TW201726B - - Google Patents

Description

A6 B6 £ 01 * 726 5. Description of the invention () The present invention relates to an injection-compression composition for preparing a sintered body. The composition contains an inorganic powder and a specific organic adhesive; in particular, the invention can The injection compression composition has good injection compressibility and the performance of removing the adhesive from the compressed initial embryo during sintering is good, so that the resulting sintered body hardly has defects such as warpage and cracking, and at high output It has good structural stability; the invention also relates to a sintered body prepared from the composition. The sintering system compresses the mixture of inorganic powder and organic adhesive and then sinters it; in recent years, the ceramic industry prepares ceramic products by first mixing ceramic powder and organic adhesive to make the mixture plastic, and then ejecting and compressing it to form a compressed initial embryo , Remove the scavenger and sinter M; this ceramic product is gradually used in automotive engine parts, and its characteristic is that some products with complex shapes can be mass produced in industry. The organic scavenger is related to the uniform dispersion of the ceramic powder, and is also related to the fluidity of the powder mixed with it, the strength of the compressed initial embryo, and the ease of removing the adhesive from the natural color compression sleep (adhesive removal); Therefore, if the type and amount of the adhesive are not properly selected, a good sintered body cannot be produced. For example, if the ceramic powder cannot be sufficiently uniformly dispersed in the organic adhesive, the resulting compressed body or sintered body is likely to occur. The defects of warpage and cracking, meanwhile, the strength of the press-knitted body will also decrease; meanwhile, if the organic adhesive has poor thermal stability, it will deteriorate in the cylinder of the injection molding machine, and the fluidity of the compressed composition will not It is stable, so it can not produce good injection compression body, and sometimes ceramic powder and organic adhesive may even separate; if excessive adhesive is used, it is difficult to avoid the occurrence of foaming and cracking. The surface paper ruler is applicable to the Chinese National Standard (CNS ) A.1 specifications (210 X 297 male) _ 3-81.9.25,000 (please read the precautions on the back before filling out this page). 装 _ Order in the Ministry of Economic Affairs Standards Bureau Employee Consumer Cooperative Yinxi Ministry of Economic Affairs Central Standards Bureau Employee Consumer Cooperative printed A6 B6__ 5. Description of the invention () This is because a large amount of gas is generated inside the compression body during the step of removing the adhesive aat »Body 0 is used for compression Organic powders for ceramic powders are used in forging and polymers. Polymers include, for example, ethylene-ethyl acrylate copolymer (EVA), polystyrene, irregular polypropylene (APP>, polyethylene, acrylic and methyl Acrylic polymer; the organic adhesive used to prepare the sintered body must have good hospitality, such as compressibility (such as compression stability, mold release characteristics M, and powder rolling when the inorganic powder is combined with the scintillator), initial compression embryo The strength, the removability of the adhesive before thermal decomposition and compression of the initial embryo before sintering, as well as the shape maintenance during sintering and the amount of breakage remaining, but each of these adhesives has its own shortcomings and cannot all meet the above needs. In general, polymer scavengers have better compressibility, but have poorer removability, for example, ethylene-vinyl acetate copolymer ( EVA) has excellent powder fluidity, and makes the formed compressed skull with high strength. When mixed with ceramic powder, it has appropriate plasticity and does not damage its fluidity; however, when the thermal decomposition is removed from the compressed body In 2001, acetic acid gas will be generated, which may cause foaming and cracking. It is likely to be generated. Similar to EVA ethylene-ethyl acrylate copolymer, it also has high strength, and when it is mixed with ceramic powder or gold powder, the compressed body has Appropriate plasticity without compromising its fluidity; however, if it is used in large quantities, when the adhesive is removed by thermal decomposition, the compressed product will have obvious foaming phenomena and cracks. Therefore, if you want to remove the adhesive It is very hard not to damage the compressed material. At the same time, polystyrene, acrylic and methacrylic polymers (such as the Chinese National Standards (CNS) A 4 specifications (210 X 297 conversion) _ 4 _ 81 -9.25,000 (please read the precautions on the back before writing this page) to install _ order. 201726 A6 B6 issued by the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 5. Description of the invention () Isobutyl methacrylate) and Porcelain powder and metal powder also have excellent adhesion effect, and the formed primary woven embryos have high strength; in other words, they can effectively prevent damage to the thin layer and maintain the compressed primary embryos in an excellent shape; The agent also has excellent thermal decomposition properties, making it easier to break away from the compression body; however, when it is used in large amounts, the mixture formed with the metal powder has poor fluidity, and it will produce a shortage of filler and injection molding Welding line. The irregular polypropylene and ceramic powder mixture has good fluidity; and it is easier to injection mold, and the resulting K shrinkage embryo has sufficient strength to be easily handled (Japanese Patent Application Kokoku No. 51-29170); however, it is The removability of the scavenger is poor. Compared with polymer adhesives, wax adhesives such as Shipan have better removal properties, but their fluidity under high pressure is unstable, making them less compressible; and because they are lower molecular weight compounds, The strength of the obtained compressed initial embryo is low. In order to obtain adhesives with satisfactory properties, we will combine two or more adhesives with different properties in a good distribution ratio, but because these adhesives have different types and softening points, and their solubility and compatibility It is also unsatisfactory, making it impossible to obtain a homogeneous mixture, or requiring a long mixing time; in general, if two or more adhesives are not enough to form a homogeneous mixture, it takes more time to determine the compression conditions Because the fluidity of the mixture is not stable; at the same time, because the uniformity of the formed compressed material is not uniform, the use of a non-uniform mixture of corrosion agents can easily cause the sintered body to crack and affect the stability of the compressed body structure. (Please read the precautions on the back before writing this page) 丨 Installation_ The paper ruler / t is applicable to China National Standards (CNS) A 4 gauge pile (2〗 0 X 297 y Chu) -5-81.9. 25,000 A6 B6 £ 01728 5. Description of the invention () (Please read the precautions on the back before filling in this page) The purpose of the present invention is to provide an injection moldable composition suitable for the preparation of sintered bodies of inorganic powder, the inorganic powder Including ceramic powder or metal powder is injection molded by injection molding, which has uniform standby distribution, including injection compressibility, strength of compressed initial embryo, removal of adhesive by thermal decomposition method before sintering; meanwhile At high output rates, the resulting sintered body does not suffer from defects such as warpage, cracking, and dents. Another object of the present invention is to provide a sintered body of ceramic powder or gold powder without defects. The purpose of the present invention will be better understood from the following. Printed by β-Consumer Cooperative Society, Central Bureau of Standards, Ministry of Economic Affairs-According to the present invention, an injection moldable composition suitable for the preparation of sintering is provided, the composition comprising an inorganic powder and an organic scavenger, the scavenger Contains 45 ~ 80wt.% Synthetic acrylic polymer and 10 ~ 50wt.% Flats, the melting point of the flats is at most 100C and is compatible with the synthetic acrylic polymer; the ratio of the inorganic powder to organic adhesive 0.65 / 0.35 to 0.25 / 0.75; the synthetic acrylic polymer is a suspension polymerization product * is a polymer component U) selected from the group consisting of ethylene-vinyl acetate copolymer and ethylene-ethyl acrylate copolymer dissolved in acrylate The monomer or methacrylate monomer or the mixture of the two monomers M and the monomer component (b) of the styrene compound, and then the resulting solution is stirred in a vehicle liquid containing a dispersant, and then the dispersion is suspended polymerization. Figures 1 to 4 are miniatures of acrylic polymers. The polymer is first etched by a solvent, and then its internal structure is examined using a scanning electron magnification of 5,000; Figures 1 and 3 are synthesized by the present invention Acrylic polymer miniature film; Figures 2 and 4 are blended with two or more polymers. The size of the paper is applicable to the Central Park National Standard (CNS) A 4 specification (2 丨 0 X 297%) — 6 81.9. 25,000

Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs ¾ 'Instruction for Invention () Prepared hybrid polymer shrink film. The inorganic powder capable of injecting the compressed composition of the present invention in combination with a specific organic adhesive is not particularly limited as long as it is an inorganic powder suitable for beetle bodies, to be otherwise stated, the gold powder is preferably a ball The particle type or spherical shape, the average particle size is about 0.1 ~ 50 / um, from the viewpoint of the packing density of the M inorganic powder and the fluidity of the compressed composition, the average particle size is particularly preferably 0.1 ~ 20 // m. Representative examples of inorganic powders include gold powders such as iron, iron alloys (such as iron-nickel alloys), iron-cobalt alloys or stainless dysprosium, aluminum alloys, or copper alloys; and oxide ceramic powders such as alum, zircon, and aluminum-rich , Andalusite Uullite), ilmenite or ferrite; nitrided ceramic powders such as silicon nitride, aluminum or boron; carbonized ceramic powders such as master silicon, aluminum sulfonate or sulfonate; and a Jinyi intermetallic compound such as titanium-aluminum alloy; a batch of phosphate powder such as apatite and the like. The inorganic powder can also contain 1-50% by volume of golden noodles or inorganic materials such as koji or crystal wires; for example, metals include mesh, stainless dysprosium, dysprosium, magnesium, nickel, titanium, beryllium, and tungsten. , Molybdenum and boron; non-golden inorganic substances include alum, zircon, sulfonated silicon, carbonized solar, silicon nitride, boron nitride and aluminum nitride. The inorganic scavenger used in the present invention contains at least two components, generally including 45 ~ 80wt.% Of synthetic acrylic polymer and 10 ~ 50wt.% (Preferably 15 ~ 40wt ·%) of the flats, the The melting point of waxes is at most 100 It is compatible with synthetic acrylic polymers; the above-mentioned mixed organic scavengers also contain 0 ~ 40wt ·%, preferably 〇 ~ 25wt.% Of additives, including the paper size applicable China National Standards (CNS) Grade A 4 (210 X 297 conversion) _ 7-81.9.25,000 (please read the precautions on the back before filling out this page) _ order.-MT consumption of the Central Bureau of Standards of the Ministry of Economic Affairs Cooperative Society Printed 3 Clothing V. Description of Invention (! ^ L · Plasticizers such as esters, lubricants or mold release agents such as higher-grade fats, surfactants to improve the wettability of inorganic powder surfaces, and surfaces Treatment agent (coupling agent). Synthetic acrylic polymer, pupa and optional additives can be mixed to form an organic adhesive before adding to the inorganic powder, or its value is added to the inorganic powder. Synthetic acrylic polymer and blending polymerization The object has an excellent uniform structure; at the same time Compressed composition also has better rolling properties, and better removal of compressed primary embryos. In addition, it also has excellent effects on the bonding of Jinluo tablets; if the synthetic acrylic polymer is used, the resulting composition will have Sufficient rollability, and the compressed primary embryos prepared at the same time have sufficient strength and plasticity. Synthetic acrylic polymer is based on polymer component (d), including ethylene-ethylene vinyl ester copolymer and / or ethylene-propylene vinyl acetate The ester copolymer and a polymerization initiator are dissolved in the monomer component (b), including acrylate or methacrylic acid ester or a mixture of the two monomers M and styrene, and then stirred in a solution medium containing a dispersant The resulting solution is then resuspended to form a dispersion liquid; if occasionally necessary, a chain transfer agent can be added to the above-mentioned liquid solution. Because synthetic acrylic polymer first dissolves EVA and / # ΕΕΑ in the monomer component and then in the medium Stir in the solution. It is like a polymer alloy, in which the compound formed by the monomer component (b) is uniformly dispersed in the polymer component (a), as shown in the first garden and the third painting The shrinking film of the synthetic acrylic polymer withdrawing the particles, the polymer is etched by the solvent to show its internal structure; the synthetic acrylic polymer is easier to determine than the blended polymer (please read the precautions on the back before filling in this Page) _Set · Order · Clothing paper size Mao applies to the Chinese prisoner National Standard (CNS) A 4 specifications (210 X 297 male seams) 1 8 — 81.9.25,000 Printed by Beigong Consumer Cooperatives, Central Bureau of Standards, Ministry of Economic Affairs *-| Agricultural 01726 Λ6 __B6__ V. Description of the invention () The conditions required to compress the composition (compare Figures 2 and 4), and the fluidity of the composition is relatively stable, so it will only be slightly spread at high output rates. Good sintered body. The ethylene-vinyl acetate copolymer (EVA) used in the present invention is not particularly limited, and may be any commercially produced type; the weight ratio of ethylene and vinyl acetate to form a copolymer is 85/15 to 50/50, preferably It is 80/20 to 60/40; if the weight ratio exceeds 85/15, it is difficult to dissolve in the monomer component (b>); if it is less than 50/50, it is not easy to form a useful copolymer and will reduce the compression of the embryo Strength; from the viewpoint of the viscosity of the copolymer solution dissolved in the single pus (M copolymer, EVA preferably has a melting rate of about 10 to 500; from the viewpoint of the fluidity of the compressed squat and the strength of the compressed initial embryo, EVA is better It has a melting rate of about 20 to 400. The ethylene-propylene ethyl acetate copolymer (EEA) used in the present invention is not particularly limited, and can be any of the commercially produced types; the weight ratio of the copolymer formed by ethylene and ethyl acrylate 85/15 to 50/50, especially M 80/20 to 60/40; because the weight ratio exceeds 85/15, it is difficult to dissolve in the monomer (b); if it is less than 50/50, it is not easy to form Useful copolymer and will reduce the strength of the compressed initial embryo; copolymer formed by dissolving in the monomer component (b> From a liquid perspective, EEA preferably has a melting rate of about 10 to 2000; from the viewpoint of fluidity and initial compression strength of the compressed body, EEA preferably has a melting rate of about 100 to 1500. Monomer composition ( The acrylic acid ester and methacrylic acid ester in b) are not particularly limited; however, from the viewpoint of powder fluidity during compression, strength of compressed primary embryos and adhesive removal rate, alcohols having 1 to 8 carbons are preferred Formed (please read the precautions on the back before filling the nest page) .-— 丨 Packing. Ordering. This paper size is applicable to China® National Standard (CNS) A 4 specifications (2〗 0 \ 297 2: Redeem) 1. 9 — 81.9.25,000 201728 A6 1. __B6__ 5. Description of the invention () (Please read the precautions on the back before writing this page) Acrylic acid ester or methacrylic acid ester is better, for example, it has l-. Alkyl (meth) acrylic acid n-alkylate, isopropyl (meth) acrylate, isobutyl (meth) acrylate, tertiary butyl (meth) acrylate, 2-ethyl (meth) acrylate Hexyl ester, 2-methoxyethyl (meth) acrylate, 2-ethoxyethyl (meth) acrylate, etc. (Meth) acrylic acid n-alkylate having LC * alkyl group, isopropyl (meth) acrylate and (meth) acrylic acid isobutyl ester are preferred, and they can also be mixed or used alone. (Methyl) Acrylic esters can be used in combination with styrenates. Representative examples are styrene, α-methyl stupid ethylene, p-methyl styrene and vinyl styrene, the content of which is preferably not more than (meth) acrylate and The weight of the mixture is 80%, the more the stupid vinyl compound content, the worse the flowability of the adhesive, so the use of a high proportion of styrene compound is easy to reduce the compressibility. Other monomers such as acrylic acid, methacrylic acid, vinyl acetate, and vinyl chloride can also be placed in component (b) as long as they do not impair the properties required by the polymer used as a scavenger. The weight ratio of the polymer component U) and the monomer component (b) printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs is about 5/95 to 80/20, preferably 20/80 to 70/30; when the weight ratio is low On 5/95, the fluidity of the powder during compression is insufficient, which leads to compression failure; if it exceeds 80/20, there will be foaming when the pyrolysis agent is removed by thermal decomposition, which reduces the strength of the knot body and makes The removal and handling of the adhesive becomes difficult. It is preferable to use a polymerization initiator soluble in oil, so that the polymerization reaction is carried out under the condition that the oil droplets are dispersed in the vehicle solution. Thus, the polymer formed by the polymer component (d) and the monomer component (b) The polymer is thoroughly blended; this paper scale is applicable to the Chinese National Standard (CNS) A.1 specification (210 X 297) 8i.9.25,000 5. Description of the invention () Representative polymerization initiators include organic peroxides such as Benzoyl peroxide, dodecyl peroxide or tertiary butyl 2-ethylperoxyhexanoate, or azoides such as corner-nitroisobutyrase or azobisdimethylpentyl M and other soluble It is used as the polymerization initiator in oils, or these initiators are used alone or in combination, and its content is about 0.05 ~ 1-5 parts, preferably 0.1 ~ 0.6 parts, which is 100 parts of monomer component ( b) The weight shall prevail. Representative examples of chain transfer agents used to control molecular placement in polymerization reactions are mercaptans such as dodecyl mercaptan, tertiary octylbenzyl alcohol, α-methylstyrene, and their dimers. These transfer agents can be Mixed or used alone, the content is about 0.01 ~ 1 part, preferably 0.03 ~ 0.5 part, the weight of the monomer component (b) of Μ100 part shall prevail. The ideal situation is that the polymer component < d > is completely dissolved in the monomer component (b) to allow the reaction to proceed uniformly to produce a polymer of uniform composition; the dissolution method is not particularly limited; when the polymerization initiator dissolves, dissolves The temperature should be lower than the decomposition temperature of the initiator, the solution is stirred in the medium containing the dispersant, and then the suspension formed is polymerized in suspension. Printed by the Employee Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs-Representative examples of known dispersants for use in the present invention include water-soluble organic compounds such as polyvinyl alcohol, hydroxyethyl ketone or polyvinyl quin Five Yuan ketone, and a combination of an anionic interfacial agent and a fine powder of a slightly soluble inorganic compound such as a-based apatite or magnesium pyrophosphate; the content of the dispersant 3 is about 0.1 ~ 1 part, preferably 0.2 ~ 0.5 part, M100 part of the weight of the medium shall prevail. The polymer component (d> and the starter may sometimes contain a transfer agent dissolved in the monomer component (b >) and the solution formed in the medium liquid is stirred in the medium liquid, which can be 81.9.25.000 (please read the back page first Matters needing attention will be written on this page) This paper ruler is suitable for the prisoner housekeeper's standard (CNS) T .ί specification (210 X 297 λ '%) 201728 Afi A6 Γ— --- B6 Α, invention description () ( Please read the precautions on the back before filling the nest.) It is water, although it contains about 30 ~ 120 parts, hinged 50 ~ 100 parts, M100 part of the medium liquid weight is subject to. Suspension polymerization reaction conditions are not dependent It is not limited, and it can be about a general method. The polymerization temperature is determined according to the decomposition temperature of the polymerization initiator used, and it is generally carried out at 501 ~ 130¾ for 2 ~ 10 hours. The resulting suspension polymerization product is a synthetic polymer, in which the single The polymer formed by the body component (b> is uniformly dispersed in the polymer component (a), as shown in FIGS. 1 and 3 in the microcosm Η. The polymer pellet is prepared according to the present invention, and is subjected to a solvent etching treatment to It shows its internal structure. The synthetic polymer prepared according to the present invention is used as a Prepare the sintering agent of the inorganic powder sintered body. The inorganic powder contains gold powder or ceramic powder, and the polymer has the above advantages; in the present invention, the synthetic acrylic polymer is combined with wax; the effect of the wax is to make the polymer easy Knead with the inorganic powder to make the inorganic powder evenly dispersed in the synthetic propylene oxide polymer, and make the formed compressed composition have plasticity; at the same time, if we use a synthetic acrylic polymer and flat and inorganic powder combination, this situation and unicast Using the comparison between the two can reduce the amount of organic adhesives. The melting point of the scorpions printed by the Sigong Consumer Cooperative of the Central Bureau of Samples of the Ministry of Economic Affairs is at most 100 =, and is compatible with the synthetic acrylic polymers used in the present invention ; If its melting point is away from 100Ό, the organic binder formed by combining it with a synthetic acrylic polymer will have a melting point, and its fluidity will be insufficient, so it is not easy to reduce the amount of adhesive agent; In addition, if the liquid The melting point of the wax is lower than the normal temperature and the solid hoe is not compatible with the synthetic acrylic resin, so the above effects will not be obtained; because Those who are unable to obtain good compression body strength and mold releasability during compression; and the latter makes the 81.9.25,000 paper size not applicable to China National Standard (CNS) A 4 specifications (210 X 297 parent) A6 B6% oine V 2. Description of the invention () (Please read the precautions on the back before filling in this page) Machine powder is not easy to disperse in the organic scavenger. The content of the hoe in the organic scavenger of the present invention is 10 ~ 50wt.%, Preferably 15 ~ 40wt.%, Based on the weight of the organic scavenger; if it is less than 10wt.%, The above effects cannot be obtained; if it exceeds 50wt.%, The serious disadvantage of the lack of strength of the pan will obviously appear, so When the compressed primary embryo is released from the wedge, it is easy to break, and the strength of the compressed primary embryo formed is not enough to withstand the general handling. The present invention can be used in combination with natural beetles and synthetic panties, for example, stone pancreas, microcrystalline seed, polyethylene seed, bees wax, carnan-ba wax, and brown media (montan) wax) and the like. The injectable shrinkage composition of the present invention contains an inorganic powder and an organic adhesive. The organic adhesive contains the basic components of a synthetic acrylic polymer and a pan. The volume ratio of the powder to the adhesive is 0.65 / 0.35 to 0.25 / 0.75. ; The calculation formula is as follows: WP / DPW b / D b volume ratio =--WP / DP + Wb / Db Wp / Dp + Wb / Db where Wp is the weight of inorganic powder and Dp is the weight of inorganic powder; employees of the Central Bureau of the Ministry of Economic Affairs Consumer Cooperative Print "

Wb-based organic adhesive weight, Db-based organic adhesive specific gravity. If the product ratio exceeds 0.65 / 0.35, the K-shrinkable composition lacks fluidity and cannot be shrunk to the desired shape; if it is less than 0.25 / 0.75, the density of the compressed initial embryo is too low, so the sintered compressed body is sintered There is a great shrinkage, the structure is quite unstable, and a large amount of gas is generated when the adhesive is removed by thermal decomposition, so that the defects of fracture and foaming are obviously produced. This paper scale is applicable to C.NS A4 specifications (2) 0 X 29) 13 81.9.25,000 201728 Afi

Ab _ B6 Five 'Description of the invention () (Please read the precautions on the back before writing this page) The sintering system for preparing ceramics or metals from the injection-compression composition of the present invention is according to the following method, but it is not particularly limited; first , Inorganic powders such as ceramic or metal powders, and organic scavengers are sufficiently kneaded under heating, the reaction is by a kneader such as a pressure kneader to uniformly disperse the inorganic powder in the organic scintillator; the resulting mixture is formed as small The shape of pellets or pulverized coarse particles is used to make an injection-compression composition; the composition is injected into a desired shape using a known method such as plastic molding and an injection molding machine; S is thermally decomposed or other Method Remove the organic adhesive in the compressed body, and sinter it into a sintered body of the desired shape under an appropriate temperature environment. The following examples will explain the present invention in more detail, where% and parts are expressed by weight unless otherwise proven. It should be understood that the present invention is not limited to the following examples. Reference Example 1 (Preparation of Synthetic Acrylic Acid Polymerization) The Central Standards Bureau of the Ministry of Economic Affairs and Industry Co., Ltd. of India took 700 grams of n-butyl methacrylate (BMA), 500 grams of styrene, and 0.35 grams of n-dodecyl thiolease. In a 5 liter reactor; add 300 grams of ethylene vinyl acetate (EVA) [manufactured by Tosoh Corporation, commercially available as "Ultracen" 722], and stir it, heating to 75TC to dissolve EAV in the monomer mixture, Then dissolve 4.8 g of benzyl peroxide gasifier and 0.25 g of benzoic acid tertiary butyl vinegar in it; mix 1,840 ml of deionized water and 160b1 of 3% polyethylene leaven to 80% to prepare a dispersion containing dispersion _ The solution was added to the reactor and stirred to form a suspension; after replacing the polymerization system with nitrogen, the polymerization reaction was carried out at 80 C for 5 hours and then at 110 C for 2 hours; the mixture after cooling the reaction was taken out and the resulting polymerization was taken out Material, washed and dried with Μ water to form white spheres, the particle size of which is 0.3 ~ 1.0mm; the size of the solid paper that produces the polymer is suitable for the Chinese Gardener Kneading Standard (CNS) A 4 specifications (210 X 2fJ7 conversion) -14-8] 9.25, 〇〇〇A6 B6 201728 V. Description of the invention () (Please read the precautions on the back before filling in this page) The cobalt degree [η] is 0.70 (same as 30 toluene solution), the polymer is listed in the table below under “Synthetic Acrylic Polymer (Α)”. Samhuang. Example 2 (Preparation of Synthetic Acrylic Polymer) 600 g of n-butyl methacrylate (BMA) and 0.3 g of n-dodecyl mercaptan were placed in a 5 liter reactor, heated to 75T and stirred; Add 900 grams of ethylene-vinyl acetate copolymer (EVA) [manufactured by Tosoh Corporation, commercially available as "Ultracen" 722] and as a polymerization initiator 2.4 grams of jasmonic peroxide, which is dissolved in BMA to form EVA- BMA solution; mix 1,840 deionized water and 160ml of 3% polyethylene fermentation solution to form a solution containing a dispersant and add it to the reactor to stir, so that EVA-BMA is suspended in the solution; replace the polymerization with deuterium gas After the system, the polymerization reaction was carried out at 80C for 3 hours, then at 100t: for 2 hours; the reaction mixture was cooled, the resulting polymer was taken out, washed with M water and dried; the produced polymer was in the form of spherulites, particle size It falls within 0.3 ~ 1mm, and its intrinsic viscosity [τι] is 0.85 (same as 30¾ in toluene solution), which is called "Synthetic Acrylic Polymer (B)" later. Reference Fan. M 3 and 4 (Preparation of Mixed Acrylic Polymer) ) Employee consumption of the Central Bureau of Samples of the Ministry of Economic Affairs Zuosha Printing and Burning will mix the EVA of Example 1 and polybutyl methacrylate and polystyrene with a molecular weight of 300,000 by mixing rolling (mixing rlls) at 150 ° C for 30 minutes to form a mixed propylene oxide polymer. (Α>, the polymer and the synthetic polymer (Α) have approximately the same composition and intrinsic viscosity. Then, the EVA M of the same example 2 and the polybutyl methacrylate with a molecular weight of 300,000 are mixed and rolled at 1401C Blending for 30 minutes to form a mixed acrylic polymer (B), the polymer and the synthetic polymer (B) have about the size of the paper and apply to the S home standard (CNS) A. 丨 specifications (210 X 297 public translation ) _1S- 81-9.25,000 A6 B6 V. Description of the invention () Slightly the same composition and inherent viscosity. The suspension polymerization products produced in Examples 1 and 2 and the blends obtained in Examples 3 and 4 are immersed in hexane 2 Etching treatment for hours to observe its internal structure. We use a scanning electron microscope with a magnification of 5,000 to observe the etched products and admixtures. The thumbnail images are shown in Figures 1 to 4, where Figure 1 is the synthetic polymer of Example 1. (A), the second picture is the mixed polymerization of example 3 Compound (A), Figure 3 is the synthetic polymer (B) of Example 2, and Figure 4 is the mixed polymer (B> of Example 2). From Figures 1 and 2, we observed the EVA of Example 1. -The BMA-styrene suspension polymerization product has a uniformly dispersed threshing, and the dispersion state of the blend of the product of Example 1 and Example 3 is obvious; from Figure 3 and Figure 4, the EVA-BMA of Example 2 A similar difference can also be observed between the floating polymer product and the Example 4 blend. Example 1 Printed in 100 parts of Cinnamon powder (manufactured by Sumitano Chemical Co., Ltd., sold under the name "Alumina AES-ΙΓ") of 100 pieces of Cinnamon powder with an average particle size of 0.4wm, added 12.35 parts of synthetic acrylic acid Polymer (B > and 4.75 parts of crystalline wax (melting point of 84%) and 1.90 parts of stearic acid; the mixture was fully kneaded at 140T with a pressure kneader for 1 hour and cut into small particles with a particle size of 2 ~ 4ββ To form a ceramic composition with a volume ratio of alumite powder and organic scavenger of 0.59 / 0.41, which is used for injection compression. When the injection pressure is 500 ~ 1300kg / cmB and the compression temperature is 120 ° ~ 160, the ceramic The composition is compressed to form a screw-type compression body (according to JIS B-176 method). The height of the compression body is 50mm and the maximum wall thickness is 5mm 81.9.25,000 (please read the precautions on the back and fill in this page) The paper size Applicable to China National Standards (CNS) Grade 4 specifications (2) 〇X 297 W points) 201726 A6 B6 Central Ministry of Economic Affairs W Industrial and Consumer Cooperation Du Printing V. Description of invention () 〇The formed compressed body is embedded in alum powder , And M 3〇r / hr The heating rate is from 20 to 140. The M4t: / hr heating rate is from 140T3 to 350¾, then 1010 / hr to 4501C, and then 30¾ / hr to 600¾ to decompose and remove the scavenger; then, Place the compressed skull in a knot kiln and heat it to 16201C for sintering. Maintain the temperature for 1 hour; the resulting sintered compressed body has no defects. Section 2 10.4 parts of synthetic acrylic polymer (B>, 4.0 parts of stone pan (melting point Add 500 and 1.6 parts of stearic acid to 100 parts of partially stabilized zircon powder with a specific surface area of 6 ma / g (product of Dai_Ichi Kigenso Kagaku Kogyo Kabushiki Kaisha, suitable for commercial sassafras as "HSY-3.0"); The mixture was fully kneaded at 140¾ for 60 minutes and then cut into small spheres with a particle size of 2 to 4 bmd to form a ceramic composition with a volume ratio of 0.51 / 0.49 of zircon powder and organic scavenger, which was used for compression injection. The ceramic composition is compressed into a screw type, which is heated and removed by the same method as in Example 1 and sintered. The only change is that the compressed body must be maintained at this temperature for 2 hours after being heated to 1500 * 0 in the sintering kiln. Sintered compact body without Defects such as warping and cracking. Section 3 Add 9.5 parts of synthetic acrylic polymer (Α), 5.0 parts of stone pan (melting point of 581C) and 1.3 parts of dibutyl oxalate to 100 parts of stone powder of Example 2 ; After 150 = fully kneaded for 6 () minutes, cut into small spheres with a particle size of 2 ~ 4ππβ to form a volume ratio of zircon powder and organic scavenger of 0.5 1 / 0.49 (please read the note on the back first Please fill out this page again) 丨 Installation and ordering. / F Applicable a a Jiajia Jiazhun (CNS) A 4 specifications (210 X 297 'Α') -11-81.9.25,000 shellfish consumption of the Central Standards Bureau of the Ministry of Economic Affairs Printed by the cooperative. V. Description of the invention () The ceramic composition for injection compression. The ceramic composition is compressed into a screw shape. The adhesive is heated and removed in the same way as in Example 1. The only change is that the compressed body is heated to 1500T in the sintering kiln: after that, it must be maintained at this temperature for 2 hours. The well-formed sintered compression skull does not have defects such as warpage and cracking. Tendon example 4. Add 6.6 parts of synthetic acrylic polymer (A), 1 · 8 parts of stone pan (melting point 69¾) and 2.6 parts of dibutyl peptidate to 100 parts of an average particle size of 8. In the powder (product of Mitsubishi Seiko Kabushiki Kaisha, commercialized as "SUS 304L"): fully kneaded at 150Ό for 60 minutes to form a metal composition for injection compression, a stainless dysprosium powder of the composition and an organic scaffold The product ratio is 0.53 / 0.47. The Jin-Yu composition was compressed into a borer type in the same manner as in Example 1. The resulting compressed body was embedded in alum powder and heated at a heating rate of M / hr in nitrogen from room temperature to 120Ό, and then heated at a rate of M / hr to 450 " C, and maintained at this temperature for 2 hours to remove the contained connections. Scrap agent; The compressed body is then placed in a vacuum sintering kiln, heated to 13501C, and maintained at this temperature for 1 hour to form a good sintered body with a sintered density of 98% and no cracks. Reeds B and ft 70 parts of synthetic acrylic polymer (B), 20 parts of stone pan (melting point 47Ό), M and 10 parts of stearin were uniformly mixed to prepare an organic scavenger. Add 12 parts of the organic adhesive to 100 parts of the fumed silicon powder (manufactured by Ube Industrial Co., Ltd., "SN-ESP"), the powder contains the paper and the standard is applicable to the national standard (CNS) A 4Specifications < 210 X 297 _ 18 _ 81.9.25,000 (please read the precautions on the back before writing this page)--Pack · Order · 201 ^ 26 A6 B6 Printed by the Employee Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs Description of the invention () There are 5% of Ya〇a and 5% of AU03, and its particle size is 0.1 ~ 0-6 / _tm: then add 12 parts of the organic adhesive to 100 parts of Mn-Zn soft ferric acid In the salt powder (product of Toda Kogyo Kabushiki Kaisha), the average particle size of the powder is 1.5wm; the kneading, compression and adhesive removal steps are carried out in the same way as in Example 1; the bet ratio of silicon nitride and cement is 0.63 /0.37; The volume ratio of ferrite and adhesive is 0.62 / 0.38. The sintered compressed body is sintered by a general sintering technique, and the formed sintered compressed body does not have defects such as warpage and cracking. Reed 7 ft 45 parts of synthetic acrylic polymer (A), 40 parts of stone pan (69t of melt) and 15 parts of dioctyl oxate are evenly mixed to prepare an organic scavenger. Add 9 parts of the organic adhesive to each of 100 parts of tungsten phosphide powder with an average particle size of 1.0 W «η and iron carbonyl powder with an average particle size of 2 to 5 wm; knead the mixture with the method of Example 4, The volume ratio of the tungsten carbide and the adhesive forming the composition is 0.50 / 0.50; the volume ratio of the iron carbonylation of the other composition and the adhesive is 0.58 / 0.42; the composition is compressed and moved in the same way as Example 4 In addition to the adhesive contained in the compressed body. The sintered compact is sintered by the general sintering technology to form a good sintered body with a sintered density of 98% and no defects. kh repeats the steps of Example 1 more than Example 1, except that Η mixed acrylic polymer (B) replaces the synthetic acrylic polymer (B); Comparing its output rate dropped by about 12 (please read the precautions on the back before writing this page).

JS This paper scale is applicable to the National Standards (CNS) A 4 specifications (2Η) X 297 7 ^)-1 9-81-9.25,000 A6 B6 Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy 53 V. Description of invention ( ) HL compared with Example 2 is the same as Example 3, except that the M mixed acrylic polymer (A) replaces the synthetic acrylic polymer (Α>; the results show that it will break during injection pressure and shrinkage, and at the same time remove the cement This phenomenon will also occur; its output rate is about 22% lower than that of Example 3. wm mm 9. In addition to 14 parts of stone seed (melting point 58l!), 2 parts of EVA and 1 part of peptide acid diacid Butyl ester is added to 100 parts of alum powder, and the rest of the injection compression steps are the same as in Example 1; when the formed compression body is taken out from the mold, it will be damaged, because the strength of the compressed snakehead is very low, so it is not well formed Compressed skeleton. 卜卜. 酧 Example 4. Prepare the compressed primary embryo in the same way as Example 1, the only change is that only synthetic acrylic polymer is added to the alumina powder) B), while still maintaining the same volume ratio of alumina powder and adhesive (0.59 / 0.41); due to its lack of liquidity, M cannot be satisfied It means to compress the initial embryo. In addition to the ingredients used in the above examples, other ingredients as described in the patent application scope can also be used, and the results are roughly the same. (Please read the precautions on the back before filling in this page) This paper size is applicable to the standard of the Sa Family Standard (CNS) A.1 (210 X 297 γ) 81.9.25,000

Claims (1)

Α7 Β7 C7 D7 VI. Application for Patent Scope No. 80 103 477 Application for Patent Scope Amendment Date of this amendment: December 81, 1_ An injection moldable composition suitable for preparing a sintered body, the composition containing an inorganic powder And an organic scavenger, the scavenger contains 45 ~ 80wt_% synthetic acrylic polymer and 10 ~ 50wt.% Flats, the melting point of the flats is at most ιοου and compatible with the synthetic acrylic polymer; The volume ratio of the inorganic powder and the organic adhesive is 0.65 / 0.35 to 0.35 / 0.65; the synthetic acrylic polymer is a suspension polymerization product, which is selected from copolymers containing ethylene-vinyl acetate copolymer and ethylene-ethyl acrylate copolymer The polymer component (a) is dissolved in the acrylate monomer or methacrylate monomer or the mixture of the two monomers and the monomer component (b) of the styrene compound, and then searched in the vehicle liquid containing the dispersant Accompanying the resulting solution, the dispersion is then suspended and polymerized. 2. The composition as described in item 丨 of the patent application park, wherein the inorganic powder is a ceramic powder or gold powder. 3. The composition as described in item 1 of the Shenhua patent scope, wherein the organic scavenger contains up to 40 wt.% Of additives, which are selected from plasticizers, lubricants, surfactants and coupling agents . 4. The composition as described in item 1 of the patent application scope, wherein the wax content of the organic adhesive is 15-40 wt.%. 5. The composition as described in item 1 of the scope of patent application, wherein the solution of component U) dissolved in component (b) contains an oil-soluble polymerization initiator. 6. The composition as described in item 1 of the scope of the patent application, in which the paper dissolved in the cost paper is applicable to the Chinese National Standard (CNS) A 4 specifications (2) 〇X 2 (j7 乂-seam) (please read the back (Notes are to be filled in this page) 丨 Installed '' Ordered by the Ministry of Economic Affairs Central Bureau of Industry and Consumer Cooperation Du Printed 81.9.10,000 ^ 017S6 A7 B7 C7 D7 a, apply for a patent model group (please read the notes on the back before the show (This page is written) The component (a) solution of sub- (b) contains a bond transfer agent. The composition as described in item 1 of the patent application, wherein the ratio of the weight g of the polymer component U> and the monomer component (b) is It is 5/95 to 80/20. 8. A kind of sintered body, which is obtained by compressing the initial embryo of the composition as described in item 1 of the patent application scope and then knotting. Central Ministry of Economic Affairs m quasi-M, industrial consumption Cooperative Society Printed Paper, Ruler, Universal, General, Family, Home, Standard (CNS), Grade A (210 x 297)