JPS5896648A - Polyester composition - Google Patents

Abstract

PURPOSE:To obtain titled composition with high crystallization rate, capable of providing molded products with outstanding surface gloss, by incorporating a polyethylene terephthalate-based resin containing a specific amount of a sulfonic acid alkali metl salt with an inorganic compound, etc. and a modified polyolefin, etc. CONSTITUTION:The objective composition can be obtained by kneading, is molten state, (A) 100 parts by wt. of a polyethylene terephthalate-based resin which has >=95mol% of an ethylene terephthalate recurring unit and contains 0.01-0.5 equivalent, per 10,000g of the polyester, of a sulfonic acid alkali metal salt, (B) 0.01-15 parts by wt. of an inorganic compound with an average particle size <=50mu, an organic compound having a carboxylic metal salt (pref. 7-30C compound), or a polymeric compound having a carboxylic metal salt and (C) 0.5-30 parts by wt. of a modified polyolefin or modified olefinic elastomer to which 0.001-10mol% of an alicyclic carboxylic acid having, in the ring, cis- double bond or its functional derivative is added. The composition is capable of molding even at mold temperatures <=120 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polyester gauze composition that has good moldability and provides molded articles with excellent surface gloss and mechanical properties. Furthermore, the present invention relates to a polyester composition that has a high crystallization rate and provides an excellent molded product even at a mold temperature of about 120° C. or less during injection molding.

Polyethylene terephthalate has excellent mechanical properties, electrical properties, heat resistance, chemical resistance, etc.

It is used as a film in many industrial products.

In this way, when used as a film, it is usually stretched, but when it is intended to be used as an injection molded product for plastic purposes, for example, it is not stretched as described above. It is known that problems with molding and physical properties may occur due to the lack of heat. In other words, K because the crystallization rate at low temperatures is low.

Normally, when the mold temperature used when injection molding other plastics is about 120°C or lower, the crystallization rate is insufficient, resulting in a difference in crystallinity between the surface and the inside of the resulting molded product. occurs and therefore has mechanical properties.

The dimensional stability and shape stability become non-uniform, and it is extremely difficult to obtain a molded product that can withstand practical use. Conventionally, many methods have been proposed to solve these problems, such as using a high-temperature mold and adding a crystal nucleating agent or a crystallization promoter.

However, the method using a high-temperature mold is not practical because the operation for raising the temperature is complicated, the molding cycle becomes long, and the working efficiency is significantly reduced.

On the other hand, although many methods of adding crystallization nucleating agents and crystallization promoters have been studied, the crystallization speed during injection molding is still not sufficient, and compared to other plastics, molding Long cycles and in some cases crystal nucleating agents5
By adding a crystallization promoter, the surface properties such as surface gloss, mechanical properties, and ripening properties of the molded product may be significantly reduced, and additives such as the crystallization promoter may volatilize during molding, causing odor. Various problems occur, such as the generation of The reality is that there are still many points to be considered regarding the method of adding crystal nucleating agents and crystallization promoters.

Therefore, the present inventors conducted intensive research to obtain a polyethylene terephthalate composition useful as a molding material that has excellent moldability, that is, a fast crystallization rate during molding, and has excellent surface gloss and mechanical properties. A specific polyethylene terephthalate resin having a fixed amount of alkali metal salt of sulfonic acid in 9 molecules is selected as the polyethylene terephthalate IN resin, and this resin k(a) contains an inorganic compound with an average particle size of 5011 or less, and a carboxyl group. gold
A small amount (or one kind) of an organic compound having a 4-salt, a polymer compound having a metal salt of a carboxyl group, and (b) a specific amount of a specific modified polyolein or a modified olefin elastomer are blended, and further as necessary. They discovered that the above objective could be achieved by blending a specific amount of fibrous reinforcing material, and achieved YK IBJ's results.

That is, the present invention provides a polyethylene terephthalate resin (having at least 9i mol % or more of ethylene terephthalate repeating units and containing 0.01 to 0.5 equivalents of an alkali metal salt of sulfonic acid per 10000 J' of polyester in the molecule). (hereinafter abbreviated as PET-8O3M)
100 parts by weight, 0.01 to 15 parts by weight of at least one of: 0) an inorganic compound with an average particle size of 50 Jl or less, an organic compound having a metal salt of a carboxyl group, and a polymer compound having a metal salt of a carboxyl group; (Foundation) At least one compound selected from the group consisting of alicyclic carboxylic acids having a cis-type double bond in the ring or their modal derivatives is added to a polyolefin or a polyolefin elastomer in a molar ratio of 0.01 to 10. 0.5 to 30 parts by weight of modified polyolefin or modified olefin elastomer,
A flea that is added to a boi ester composition formed by combining the following ingredients: J! iE is the above-mentioned pot varnish composition 101
This invention relates to a polyester composition eyelid in which a fibrous reinforcing material is blended in an amount of 1.5.1 parts by weight per 0 parts by weight.

The inventors of the present invention have developed this method further.
No. 163221, polyethylene terephthalate or a polyester having at least 80 molar units of ethylene terephthalate repeating units is treated with specified amounts of components (
When a) and component (b) are combined, the crystallization rate of polyester increases, and surface properties such as surface gloss are improved.
Although it was shown that a composition useful as a molding material was provided, as a result of further intensive research, it was found that the polyester has at least 95 molar units of ethylene terephthalate repeating units and contains polyester 10% in the molecule.
If a polyethylene terephthalate resin containing 0.01 to 0.5 equivalents of an alkali metal salt of sulfonic acid is used, the crystallization rate will be even higher and the surface gloss will be better. The inventors have discovered that when a fibrous reinforcing material is blended, a set or material useful as a molding material with excellent mechanical properties can be obtained.

Conventionally, it has been known that adding fibrous reinforcing materials such as glass fibers to polyethylene terephthalate resin improves the mechanical and thermal properties of the polyethylene terephthalate resin. Not only that, but the crystallization speed of polyethylene terephthalate resin is slow.

The molding cycle becomes longer and the mold temperature increases to about 120°C, for example.
If the temperature is below or below, crystallization will not proceed sufficiently.
Not only does the dimensional stability of the molded product deteriorate, but it also makes it impossible to fully demonstrate its original performance in both thermal and mechanical properties.To solve these problems, crystal nucleating agents and crystallization promoters are used. Various studies have been conducted on adding agents, but in this case, crystal nucleating agents, crystallization promoters, etc. can be evenly mixed and dispersed in the resin, and they can be stably compatible even during heating during injection molding. It is necessary that it does not melt and ooze out of the molded product or volatilize and escape. however,
Conventionally used additives do not have sufficient compatibility with polyethylene terephthalate resins, causing problems as they may partially separate and ooze out when heated to <K, or may evaporate and dissipate. .

On the other hand, in the polyester composition of the present invention,
Because a specific modified polyolefin or modified olefin elastomer is used as the component (←), its compatibility with polyester resin is significantly superior to that of ordinary polyolefins and olefin elastomers, and even when heated, polyester It does not become busy or evaporate when separated from the other. 9 In the present invention, a polyethylene terephthalate resin containing a specific amount of an alkali metal salt of sulfonic acid is used as the polyester, and the component Ip
) and 5i min 0), the crystallization rate is high, and even when the mold temperature during injection molding is 120℃ or less, for example at a temperature of 100 to 70℃, excellent surface gloss can be achieved with a short cooling time. It is possible to obtain a molded product with .

Furthermore, the polyester composition of the present invention containing a specific amount of fibrous reinforcement has excellent moldability, surface properties, and mechanical properties, providing a well-balanced and useful molding material. .

In the present invention, the polyethylene terephthalate resin containing an alkali metal salt of sulfonic acid in its molecule can be prepared by simply copolymerizing a specific amount of an ester bond-forming monomer containing an alkali metal salt of sulfonic acid, or by simply copolymerizing a specific amount of an ester bond-forming monomer containing an alkali metal salt of sulfonic acid. It can be obtained, for example, by a method of melt-mixing polyester having a metal salt and polyethylene terephthalate using an extruder. Examples of ester bond-forming monomers containing an alkali metal salt of sulfonic acid include dibasic acids containing an alkali metal salt of sulfonic acid, monoesters or diesters thereof, and glycols containing an alkali metal salt of sulfonic acid. or oxycarboxylic acid derivatives are mainly used as copolymerization components, and monobasic acids or esters thereof containing alkali metal salts of sulfonic acids, monoalcohols containing alkali metal salts of sulfonic acids, etc. are used as polymerization terminators or terminals. It can also be used as a sequestering agent.

Ester-forming monomers containing such alkali metal salts of sulfonic acids include 1, for example, sodium 2.5- or 3.5-dicarboxybenzenesulfonate;
2.5- or 3.5-dicarbomethoxybenzenesulfonic acid sodium A, 2.5- or 3.5-di(7
- Sodium hydroxyethyl)benzenesulfonate,
a-Sodium sulfosuccinic acid and its dimethyl ester, β-sodium sulfoadipic acid and its dimethyl ester, 2-carbo-l-hydroxyethoxy-
Sodium 5-hydroxyethoxybenzenesulfonate, 3-sodium sulfo-1,8-naphthalene dicarboxylic acid, 4,4'-di(carbomethoxy)biphenyl-2
Specific examples include sodium -sulfonate, p-sodium sulfobenzoic acid, sodium 3-hydroxypropane-1-sulfonate, and compounds in which the sodium salt of the above compound is replaced with a potassium salt or lithium salt.

Usually, sodium or potassium 3,5-dicarboxybenzenesulfonate or its dimethyl ester, available from JK Co., Ltd., is used.

In the present invention, it is necessary to use a polyester containing 0.01 to 0.5 equivalents of an alkali metal salt of sulfonic acid per 100,000 mol of polyester in the molecule and having at least 95 molar units of ethylene terephthalate repeating units. In this case, the alkali metal salt of sulfonic acid acts as a type of crystal nucleating agent, increasing the crystallization rate of the polyester. The content of the alkali metal salt of sulfonic acid is 0.5 per 100,007 polyester.
If the amount exceeds the equivalent amount, the effect of the crystal nucleating agent will increase to some extent, but the bulky alkali metal salt of sulfonic acid will hinder molecular orientation and crystallization, and ultimately the crystallization rate will decrease. There is a tendency for this to decline. Conversely, if the content of alkali metal salt of sulfonic acid is 10,000
If the amount is less than 0.01fi per jl.

The effect as a crystal nucleating agent is insufficient, and the effect is only the same as that of ordinary polyethylene terephthalate. Therefore, the content of the alkali metal salt of sulfonic acid in the polyester is 0.01 to 0 per 10000 II of Bolier, Stell.
．． It is necessary to suppress it to 5 hit tht, preferably ゛-0,
It is preferable to have an equivalent of 0.01 to 0.3, and a content of 0.01 to 0.15 equivalent.

First, the polyester used in the present invention is 1
The amount of alkali v *is* of sulfonic acid in the molecule is 10
It is necessary to use a polyester containing at least 95 moles of ethylene terephthalate repeating units while suppressing 0.01 to 0.5 moles per 0001.If the number of ethylene terephthalate repeating units is less than 95 moles, even if the sulfone Even if the amount of the alkali metal salt of the acid is suppressed within the above range, there may be cases where it is difficult to increase the crystallization rate. Generally, when polyethylene terephthalate is produced from terephthalic acid or its ester derivative and ethylene glycol by a melt polymerization method, several moles of diethylene glycol units are introduced into the main chain of the polymer due to a side reaction of ethylene glycol. It is well known that copolymerization of an ester-forming monomer containing an alkali metal salt of sulfonic acid will further facilitate the formation of diethylene glycol. Production was kept low. It is desirable to use a polyester having at least 95 mole qb of ethylene terephthalate repeating units, preferably 97 mole qb or more.

The method for producing the polyester of the present invention includes using an ester-forming monomer containing an alkali metal salt of sulfonic acid,
A method of copolymerization with monomers that primarily produce ethylene terephthalate repeating units.

Alternatively, a method of leaving a polyester having an alkali metal salt of sulfonic acid in the molecule and mixing it with polyethylene terephthalate can be cited as an example.

In the present invention, the polyolefin or olefin elastomer used as a raw material in producing the modified polyolein or modified olefin elastomer is a homopolymer of olefins such as polyethylene, polypropylene, polybutene-1, polybenzone-1, etc. Or ethylene-propylene typical/copolymer, ethylene-butene-1 copolymer, propylene-butene-1 copolymer, ethylene-vinyl acetate copolymer, guapylene-vinyl acetate copolymer, ethylene-butadiene copolymer , ethylene-isoprene copolymer, ethylene-chloroprene copolymer, propylene-butadiene copolymer, ethylene-propylene-butadiene copolymer, etc.
Examples include copolymers with olefins or diolefins, and the copolymers may be random copolymers, block copolymers, graft copolymers, or alternating copolymers.

and especially ethylene-propylene copolymers.

Preferable examples include ethylene-butene-1 copolymer, ethylene-vinyl acetate copolymer, ethylene-propylene-butadiene copolymer, ethylene-propylene-isoprene si-polymer, and ethylene-propylene-chlorobrene copolymer.

Two or more types of polyolefins or olefin elastomers can also be used as a mixture.

The alicyclic carboxylic acid having a cis-type double bond in the ring as used in the present invention includes 1, for example, cis-4-cyclohexene-1
, 2-dicarboxylic acid, endo-bicyclo-[λ2,1)
-5-hebden-2,3-dicarboxylic acid, methyl-endo-cis-bicyclo-[2゜2,1) -5-hebutene-2,3-dicarboxylic acid, endo-bicyclo-C2,
2,13-1,2,3,4,7,7-hexachloro-2
-hebutene-46-dicarboxylic acid, etc., and functional derivatives thereof include acid anhydrides, esters, acid amides, acid halides, metal salts, and the like. and preferably endo-bicyclo-[2,
2,1]-5-hebutene-2,3-dicarboxylic acid or its acid anhydride. Note that the # functional derivative does not necessarily need to be converted into a functional derivative before being added to the polyolefin or olefin elastomer, and can be converted, for example, during the process of adding polyolefin or olefin elastomer or after forming a polyester composition.

The universal polyolefin or modified olefin elastomer of the present invention refers to at least one polyolefin or olefin elastomer selected from the group consisting of alicyclic carboxylic acids or functional derivatives thereof having a cis-type double bond within the polyolefin or olefin elastomer. It means a modified polyolein or a modified olefin elastomer obtained by adding a cypress compound, or a mixture thereof with an untreated polyolefin or an unmodified olefin elastomer.

Modified polyolefins and modified olefin elastomers can be produced by various methods, but desirably, the above-mentioned polyolefin or olefin-based elastomer and the above-mentioned alicyclic carboxylic acid or functional derivative having a cis-type double bond in the ring are used. Radical generators, such as di-tertiary
Adding and melting an organic peroxide such as butyl peroxide, dichloromethane, benzoyl peroxide, or the like, or dispersing the polyolefin or olefin elastomer and the carboxylic acid or its functional derivative in water, This is carried out by heating in the presence of the above-mentioned radical generator or water-soluble peroxide.

Here, the addition ratio of the carboxylic acid or its functional derivative to be added to the polyolefin or olefin elastomer depends on the intended use of the polyester composition, the type of polyolefin or olefin elastomer, and the mixing ratio thereof.

Although it varies depending on the amount of the carboxylic acid or its functional derivative, usually 0.001 to 10 molar addition of the carboxylic acid or its functional derivative to the polyolefin or olefin elastomer is used.
Preferably o, o 1-in mol%.

It is preferable to use 0.05 to 2.0 molar additions.

The amount of the carboxylic acid or functional derivative added is 0.001
If the amount is less than 10%, the compatibility with PET-8O3M and interfacial adhesion will be poor, and therefore the effect as a crystallization promoter will not be fully demonstrated. In the step of blending with PET-8O3M, side reactions such as lowering of the molecular weight of the Bov7 olefin or olefinic enstomer and gluing occur, which is not preferable.

Regarding the blend of modified polyolefin or modified olefin elastomer, i.e. ←),
←) The amount of ingredients is polyester (PET-8O3M)
If it is less than 0.51 parts by weight per 100 parts by weight, the effect as a crystallization promoter will be insufficient and a molded product with excellent surface properties will not be obtained.On the other hand, if it is more than 30 parts by weight, heat Since other performances such as physical properties are deteriorated, the amount of component (←) is 0.5 to 30 parts by weight, preferably 0.5 to 20 parts by weight, per 100 parts by weight of PET-SO3M.
More preferably, it is 1 to 10 parts by weight.

The inorganic compound used as component (a) of the present invention is as follows.

70 The effectiveness as a crystal nucleating agent varies depending on the particle size.

If the average particle size exceeds about 50 tones, the effect becomes small, so inorganic compounds with an average particle size of 50 tones or less are generally useful.

Specific examples of inorganic compounds with an average particle size of 50 tones or less used in the present invention include carbon black, silica, calcium carbonate, synthetic silicic acid and silicates, zinc white, hallosite clay, kaolin, and bases. Charcoal I
IIIi Gnesium, Mica.

Examples include Merck powder, quartz powder, diatomaceous earth, carbon dioxide powder, titanium oxide, zinc oxide, zinc oxide, antimony, barium sulfate, calcium sulfate, alkalinity, calcium silicate, etc., and these inorganic compounds Although one or more of these can be used.

Among them, mica, kaolin, Merck, and silica are useful in the present invention.

In addition, as the organic compound having a metal salt of a carboxyl group used in the present invention, gold J of a carboxyl group is used.
Any compound having i [9 can be used, but usually metal salts of higher fatty acids and aromatic acids having about 7 to 30 carbon atoms are used, such as hebutanoic acid and pelargon. acid.

Lauric acid, myristic acid, pallic acid, stearic acid, behenic acid, heptatinic acid, montanic acid.

Metal salts of higher fatty acids such as melisic acid, benzoic acid.

Terephthalic acid, terephthalic acid monomethyl ester.

Nine specific examples include metal salts of aromatic acids such as monomethyl ester of isophthalic acid and in-7thalic acid.

I did. As a polymer compound having a metal salt of a carboxyl group, poly! has a metal salt of a carboxyl group at the end or side chain of the polymer. There are no particular restrictions if -, but two examples are carboxyl group-containing polyethylene obtained by oxidizing polyethylene, carboxyl group-containing polypropylene obtained by oxidizing polypropylene, olefins such as ethylene, propylene, butene-1, etc. Specific examples include metal salts such as copolymers of meth)acrylic acid, copolymers of olefins and maleic anhydride, copolymers of styrene and (meth)acrylic acid, and copolymers of styrene and maleic anhydride. 2 Usually olefin and (meth)acrylic acid or styrene and (meth)
Metal salts of copolymers of acrylic acid are used. As metals that form salts with carboxyl groups, alkaline earth metals, alkali metals, etc. are usually used, and alkali metals have excellent effects as crystal nucleating agents, with sodium and potassium being particularly useful.

The amount of component (2) to be blended depends on the type of ingredients used, but inorganic compounds with an average particle size of 5011 or less, metal salts with carboxyl groups, organic compounds with carboxyl groups, gold JIi with carboxyl groups, etc. The blending amount of at least one of the polymer compounds having #i is PET-8OsM
If it is less than 0.001 parts by weight relative to 10 parts by weight, the effect as a crystal nucleating agent is insufficient; , the extra one acts only as a filler. Therefore, the amount of component (a) to be blended is 0.01 to 15 parts by weight, preferably 0.05 to 10 parts by weight, and more preferably 0.1 to 5 parts by weight, based on PET-803M.

Examples of fibrous reinforcing materials used in the present invention include glass fiber, carbon lI fiber, aromatic polyamide fiber,
Although specific examples include silicon carbide fibers and #1 titanate fibers, glass fibers are usually used. In addition, it is difficult to mix and disperse the fibers evenly with the diameter of each wood fiber, i.e., the component (B) or the component (B).
If the length of the fiber is too short, the effect as a reinforcing material will be insufficient.9 Usually, fibers with a length of 0.1-10 are used, especially when the fibrous reinforcing material is glass fiber. The fiber length is preferably 0.1 to 7 mm, more preferably 0.3 to 4 mm. In addition, the fibrous reinforcement is PE
In order to improve the interfacial adhesive strength with T-8O3M and increase the reinforcing effect, it is possible to use materials treated with various compounds as necessary, but when using glass fiber as a fibrous reinforcing material, There are various surface treatment agents.

Examples include vinyltriethoxysilane, r-methacryloxypropylmethoxysilane=/(3,4-xpoxycyclohexyl)-ethyltrimethoxysilane, r-glycidoxypropyltrimethoxysilane, r-aminopropyltriethoxysilane .

Those treated with a silane treatment agent such as r-chloropropylmethoxysilane or r-mercaptoglobil trimethoxysilane, or a chromium treatment agent such as methacrylate chloride are used.

Regarding the blending amount of the mm-shaped reinforcing material, if the blending amount is less than 5 parts by weight with respect to 100 parts by weight of the polyester composition consisting of PET=s03M, component (a), and component (←), mechanical properties of And, if the effect of improving thermal properties is insufficient and the reverse K exceeds 150, it becomes difficult to mix uniformly into the Ill-shaped reinforcement composition. Therefore, the blending amount of the H-cone reinforcement is 5% for 100 heavy lids of the polyester composition before adding the twill reinforcement.
~150 parts by weight.

Preferably it is 20 to 100 parts by weight.

The composition of the present invention may further contain various rootless to organic compounds such as antioxidants, ultraviolet absorbers, colorants, mold release agents, and fillers, as required.

The polyester composition of the present invention can be produced by mixing in various methods, and the production method is not particularly limited.9 Usually, each component or additive is melted using an extruder or kneader. Manufactured by mixing.

The composition of the present invention can be molded in the form of citron, such as citrus molded products, films, sheets, fibrous materials, etc.

Next, the present invention will be specifically explained by referring to Examples and Comparative Examples. It should be noted that the "circle" shown in Examples and Comparative Examples indicates "parts by weight."

Examples 1-8. Comparative Examples 1 and 2 Various polyolefins or olefinic elastomers were treated with endo-bicyclo-[''2.2.1]-]5-heptene-2.3-dicarboxylic anhydride, hereinafter referred to as a modifier (4)] or endo-bicyclo- −[2,2,1)−
5-heptene-2,3-dicarboxylic acid methyl ester [
Modifier (hereinafter abbreviated as "modifier")] was added in various proportions, and to this was added 1 part by weight of ditertiary butyl (-oxide) per 1,000 parts by weight of the polyolefin or olefin elastomer, and the mixture was mixed with a Henschel mixer at room temperature. The mixture was fed to an extruder and extruded at about 200°C to produce pellets of modified polyolefins or habit-forming olefin elastomers shown in Table 1.

IPR: Ethylene tape copolymer, terephthalic acid, ethylene glycol.

5-Sodium sulfoinphthalic acid was melt-polymerized in a conventional manner to obtain a sulfonic acid sodium salt content of 2.5 mol%,
Cyethylene crico + included! Polyethylene terephthalate-based polymer (hereinafter referred to as PET-8O3N) containing 3.0 moles and 94.5 moles of ethylene terephthalate repeating units.
(abbreviated as &) was synthesized. The sodium salt content of sulfonic acid in this polyester is 100007'f
i91.28 equivalents. This PET-8O3N&,
Contains diethylene glycol! 2.0 mol of polyethylene terephthalate (hereinafter abbreviated as PET) and P
ET-8O3N&/PET-5/95.3/97 (
(weight ratio), and this was melt-extruded to produce pellets. The sodium salt content of sulfonic acid in Kowara pellets is 0 per 10,000 I of polyester, respectively.
．． 0.065 equivalent and 0.03 g equivalent.

Next, polyethylene terephthalate polymers 1o having different contents of alkali metal salts of sulfonic acid were prepared.

In the section, talc (manufactured by Nippon Merck Co., Ltd., Micro Ace -1)
1 part of modified polyolefin or 3 parts of modified olefin elastomer were mixed using a tumbler, and the mixture was melt-extruded using a 65 φ extruder to form pellets.

Differential calorimeters (Model DSC-1, manufactured by PerkinElmer) were used for various samples manufactured in this way.
The melting point (Tm') was determined by increasing the temperature at a rate of 28 C/min.
After holding at 0° C. for 5 minutes, cooling crystallization temperature (Tee) was measured from exothermic beeping when cooling at a rate of 20° C./min. The crystallization rate was evaluated from the TCC value, peak shape, and Δ'l'Kobata-'i'ec. In addition,
It can be said that the larger the value of 'l'cc, the sharper the peak of 'rcc, and the smaller ΔT, the higher the crystallization rate.

The results are shown in Table 2.

Table 2 Examples 9 to 13 Polyethylene terephthalate pellets 1 containing 0.03 g equivalent of sodium salt of sulfonic acid in the molecule per 10oo II of the polyester produced in Examples 1 to 8
00 copies, glass IIi miscellaneous [Made by Asahi Fiberglass @ 2
Product number 429, 3 ■ long strands], monopolyolefin (1), and specified amounts of each crystal nucleating agent were tumbled.
After mixing, the mixture was melt-extruded using a 65Wφ extruder to produce pellets. After drying the obtained pellets, the cylinder temperature was 240-270-280°C, the mold temperature was 96°C, the injection pressure was 10 seconds, and the injection pressure was 300-60°C.
172 inches x 172 inches x 2.5 under 0Ved conditions
Inch specimens were molded. At that time, the cooling time was adjusted and the minimum cooling time was determined from the mold releasability. All molded articles had excellent surface appearance. The results are shown in Table 3.

Table 3 t-9y1555: Manufactured by De Bonn Co., Ltd., ethylene=metaata 9# acid typical combination: Nato ν rim salt Kaolin: Manufactured by Jōtari Kaolin Co., Ltd., N,N-kaolin Kreme I: Manufactured by Kuraray, Sujirite 200 HK
Shi1tsuka = Effect J1s fixed form Siri★Patent applicant
Continued from Unitika Co., Ltd. Page 1 0 Inventor Minoru Mitsui 3-131 Miyanohira Terada, Joyo City 0 Inventor Osamu Doi 12-28 Mukaigawara, Joyo City

Claims (1)

[Scope of Claims] (1) has at least 95 molar units of ethylene terephthalate repeating units, and has polyester 10 in the molecule;
000I To 100 parts by weight of a polyethylene terephthalate resin containing 0.01 to 0.5 equivalents of an alkali metal salt of sulfonic acid, 0) an inorganic compound with an average particle size of 50 s or less, an organic compound having a metal salt of a carboxyl group. , 0.01-15 parts by weight of at least one kind of polymer compound having a metal salt of a carboxyl group, (b) cis-type 0,
Modified polyolefin or modified olefin elastomer with 0.001 to 10 molar addition of at least one compound selected from the group consisting of alicyclic carboxylic acids having a double bond in the ring or functional derivatives thereof 0.5 to 30 A polyester composition formed by blending parts by weight. (2) A polyester composition comprising 5 to 150 parts by weight of a twill reinforcing material to 100 parts by weight of the polynisder composition according to claim 1. (8) As the inorganic compound with an average grain size of 415,011 or less, one or more types of inorganic substances selected from the group of talc, mica, kaolin, and silica are used, Claims 1 and U: 2 The polyester composition described. (41) The polyester composition according to claim 1 and claim 2, wherein the metal salt of a carboxyl group is a sodium salt or potassium salt of a carboxyl group. (6) Organic compound having a metal salt of a carboxyl group The polyester composition according to claims 1 and 2, wherein is a compound having 7 to 30 carbon atoms. (6) The polymer compound having a metal salt of a carboxyl group has an olefin and (meth) The polyester composition according to claims 1 and 2, which is a copolymer of acrylic acid or a copolymer of styrene and (meth)acrylic acid.A claim in which the Cγ111 miscellaneous reinforcing material is glass m-fiber. The polyester composition according to item 2.