JPH0711079A - Aromatic vinyl resin composition - Google Patents

Abstract

(57) [Summary] [Structure] Aromatic vinyl resin (A) such as styrene-methacrylic acid copolymer, rubber resin (B) such as methyl methacrylate-butadiene-styrene copolymer, and stearyl alcohol. And higher alcohols and / or phenols such as bisphenol A. [Effect] Excellent impact resistance and appearance of molded products.

Description

Detailed Description of the Invention

[0001]

The present invention relates to electric, electronic, OA, communication, audio, video, automobile, vehicle, machine, sports equipment,
The present invention relates to a thermoplastic resin composition useful in various fields such as daily sundries and civil engineering.

[0002]

2. Description of the Related Art Polystyrene is excellent in transparent moldability and used in a large amount in many fields, but it has a problem of poor heat resistance and impact resistance. Therefore, conventionally, for example, in JP-A-62-163949, a styrene-methacrylic acid copolymer resin obtained by polymerizing styrene and methacrylic acid, and methyl methacrylate and styrene in the presence of a rubber-like polymer are disclosed. There is disclosed a technique for obtaining a styrene-based resin composition having excellent heat resistance and impact resistance by mixing with a graft copolymer resin obtained by polymerizing and.

On the other hand, when a styrene-methacrylic acid copolymer resin is used, there is a problem that the carboxylic acid of methacrylic acid is dehydrated and condensed, and the resulting water causes a silver streak in the molded article. Japanese Unexamined Patent Publication No. 59-230043 discloses a technique of adding an alcohol to a styrene-methacrylic acid copolymer to solve a defective appearance such as silver.

[0004]

However, the above-mentioned Japanese Patent Application Laid-Open No. 62-62
The styrene resin composition described in JP-A-163949,
Although excellent in heat resistance and impact resistance, as described above,
Since the styrene-methacrylic acid copolymer is used as one component thereof, there is a problem that silver streak is likely to occur in a molded product and a defective appearance is likely to occur.
The impact resistance improving effect was also not sufficient.

Further, although the resin composition described in JP-A-59-230043 is certainly excellent in appearance characteristics, it has no impact resistance at all.

That is, up to now, no one having both impact resistance and appearance of the molded product has been obtained at present. The problem to be solved by the present invention is to provide a resin composition having excellent impact resistance and excellent appearance of a molded product.

[0007]

Means for Solving the Problems As a result of intensive studies, the present invention has revealed that an aromatic vinyl resin (A) and a rubber resin (B) are blended with a higher alcohol and / or a phenol compound. The inventors have found that the above problems can be solved and completed the present invention.

That is, the present invention is an aromatic vinyl resin (A).
And a rubber-based resin (B) and a higher alcohol and / or a phenol (C).

First, the resin (A) used in the present invention is obtained by polymerizing an aromatic vinyl monomer as an essential component. Examples of the aromatic vinyl monomer include styrene and
α-methylstyrene, o-, m-, p-methylstyrene, vinylxylene, monochlorostyrene, dichlorostyrene, monobromostyrene, dibromostyrene, p-
Examples thereof include tert-butylstyrene, ethylstyrene, vinylnaphthalene, and the like.

Further, the resin (A) has not only impact resistance and appearance of a molded article, but also extremely high impact resistance of the resin composition of the present invention, by reacting the aromatic vinyl monomer with an unsaturated carboxylic acid. Excellent heat resistance can also be imparted. Further, the copolymer of the aromatic vinyl monomer and the unsaturated carboxylic acid may be one obtained by reacting another monomer copolymerizable therewith, if necessary.

When the above-mentioned copolymer of an aromatic vinyl monomer and an unsaturated carboxylic acid is used as the resin (A), styrene, α-methylstyrene and p-tert-butylstyrene are used as the aromatic vinyl monomer. Among them, styrene and a mixture of styrene and α-methylstyrene are preferable because of excellent reactivity with unsaturated carboxylic acid.

Examples of the unsaturated carboxylic acid include polymerizable unsaturated fatty acids such as itaconic acid, maleic acid, fumaric acid, crotonic acid and cinnamic acid, acrylic acid, methacrylic acid or a mixture of acrylic acid and methacrylic acid. Among them, (meth) acrylic acid is preferable, and among them, (meth) acrylic acid is preferable from the viewpoints that a molded product having excellent heat resistance and appearance can be obtained and that the copolymer resin (A) can be easily produced.

In this copolymer (A), the polymerization rate of the aromatic vinyl monomer and the unsaturated carboxylic acid is not particularly limited, but it is excellent in improving the impact strength and fluidity of the molded product. From the viewpoint, the aromatic vinyl monomer / unsaturated carboxylic acid is preferably in the range of 97/3 to 70/30.

Examples of the above-mentioned aromatic vinyl monomer and other monomer copolymerizable with the unsaturated carboxylic acid include vinyl-cyan compounds represented by acrylonitrile and methacrylonitrile; N-methylmaleimide, N-ethylmaleimide, N- Butyl maleimide, N-octyl maleimide, N-isopropyl maleimide, N-phenyl maleimide, N-p-bromophenyl maleimide, N
Maleimides typified by -o-chlorophenylmaleimide and N-cyclohexylmaleimide; unsaturated carboxylic acid anhydrides typified by maleic anhydride, itaconic anhydride, citraconic anhydride and the like; allyl glycidyl ether, glycidyl methacrylate Unsaturated compounds containing an epoxy group represented by: Allylamine, aminoethyl methacrylate, aminopropyl methacrylate, amino group-containing unsaturated compounds represented by aminostyrene; Acrylamide, represented by N-methylacrylamide Compounds: 2-hydroxyethyl-acrylate, 3-hydroxypropyl methacrylate, 4-
Examples thereof include, but are not limited to, a hydroxyl group-containing unsaturated compound such as hydroxy-2-butene. These other monomers can be used alone or in combination of two or more.

By copolymerizing these other monomers, the compatibility with the rubber resin (B) can be improved, and the heat resistance and the like can be further improved.

The proportion of these other monomers used is not particularly limited, but is usually 100 parts by weight or less with respect to 100 parts by weight of the resin component comprising the aromatic vinyl monomer and the unsaturated carboxylic acid. Can be used in.

Thus, the resin (A) used in the present invention comprises an aromatic vinyl monomer and an unsaturated carboxylic acid,
Alternatively, it may be a copolymer with another monomer copolymerizable therewith, but a rubber-based resin (B) described later.
Are not included in these.

The resin (A) can be manufactured by a commonly used manufacturing method, and the method is not particularly limited. For example, as a method for manufacturing a copolymer of an aromatic vinyl monomer and an unsaturated carboxylic acid. Is JP-A-60-10
No. 6818, No. 60-168710, No. 61-43612, No. 61-16394.
It can be easily produced by the methods exemplified in JP-A No. 9 and JP-A No. 62-74908.

Specifically, in the presence or absence of a commonly used radical catalyst or ionic catalyst,
Emulsion polymerization, suspension polymerization, bulk polymerization, solution polymerization, or emulsion-suspension polymerization, emulsion-solution polymerization, suspension-solution polymerization method, etc., batch, continuous or batch-continuous production method. be able to. For example, one or more kinds of aromatic vinyl monomers may be used alone, or these aromatic vinyl monomers and unsaturated carboxylic acids may be added with other monomers copolymerizable with them, if necessary. Using a transfer agent, 60-
The method is, for example, suspension polymerization or bulk polymerization at 180 ° C., preferably 75 to 120 ° C., and granulating with an extruder or the like.

The polymer chain structure of the resin (A) produced by these production methods is not particularly limited, and examples thereof include an isotactic structure, an atactic structure, a syndiotactic structure, and the like. In the case of a copolymer with an unsaturated carboxylic acid or a copolymer with an unsaturated carboxylic acid and another copolymerizable monomer, either a random copolymer, a block copolymer or a graft copolymer. May be The weight average molecular weight (Mw) of this resin (A) is usually 30,000.
0 to 500,000, particularly preferably 180,000 to 350,000 in terms of excellent moldability and strength when formed into a molded product.

When the resin (A) thus obtained is used as a copolymer, glutaric acid, which is a polymer obtained by further pretreating a part of the carboxyl groups present in the molecule into an acid anhydride, is used. Modified polymer used as an anhydride group, polymer ionically cross-linked with alkali metal, alcal earth metal, etc. by taking advantage of the characteristics of carboxy group, or obtained by forming amide bond or ester bond with amide group-containing compound, hydroxyl group-containing compound, etc. The modified polymer thus obtained is also included in the above-mentioned copolymer.

The rubber resin (B) used in the present invention is a copolymer resin obtained by copolymerizing an aromatic vinyl monomer and a rubber polymer as an essential component. Examples of aromatic vinyl monomers include, but are not limited to, styrene, α-methylstyrene, tert-butylstyrene, and the like.

Examples of the rubbery polymer include rubber and thermoplastic elastomers.

As the rubber, for example, natural rubber (NR),
Styrene butadiene rubber (SBR), butadiene rubber (BR), isoprene rubber (IR), chloroprene rubber (CR), butyl rubber (IIR), ethylene-propylene rubber (EPDM, EPM), acrylic rubber (ACM,
ANM), chlorinated polyethylene rubber (CSR), fluororubber (FKM), silicone rubber (Q), urethane rubber (AU, EU), polysulfide rubber (T), epichlorohydrin rubber (CO, ECO), chlorosulfonated polyethylene (CSM), norbornene rubber and / or their vulcanized polymeric materials.

Of these, styrene-butadiene rubber (SBR) and butadiene rubber (BR) are preferable from the viewpoint of excellent impact resistance, and ethylene-propylene rubber (EPDM, EPM) and acrylic rubber (from the viewpoint of excellent weather resistance). ACM) is preferred.

On the other hand, a polymer material which does not require vulcanization as a thermoplastic elastomer, exhibits plasticity in a high temperature range, and exhibits rubber elasticity at around room temperature, has a property intermediate between rubber and a thermoplastic resin or has both properties. It is shown. These thermoplastic elastomers are characterized by having both a soft segment having elasticity in the polymer chain and a hard segment, which is a crystalline or glassy component that prevents plastic change near room temperature, and which are incompatible with each other. It is a thing.

The soft segment is typically an amorphous polymer having a low glass transition temperature such as polybutadiene, polyether, polyester, etc., and the hard segment is typically polystyrene or polyurethane due to its constrained form and form. Non-crosslinked hard segments and crosslinked hard segments (ionomers) represented by alkali and alkaline earth metals are typical.

More specifically, styrene-butadiene, styrene-isoprene block or graft copolymers, butadiene and / or isoprene-styrene-methylmethacrylate-acrylonitrile block or graft copolymers and those shown in Table 1. A typical example is a polymer material having a hard segment and a soft segment.

[0029]

[Table 1] The rubber-based resin (B) can be obtained by copolymerizing the aromatic vinyl monomer and the rubber-like polymer with another monomer copolymerizable with the aromatic vinyl monomer and the rubber-like polymer in order to further improve the compatibility with the copolymer (A). .

Other monomers include unsaturated carboxylic acid alkyl esters such as methyl (meth) acrylate, ethyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate; acrylic acid, methacrylic acid, maleic anhydride. And unsaturated carboxylic acids such as acrylonitrile, methacrylonitrile, phenyl or cyclohexyl, and mariimide. These can be used alone or in combination of two or more.

Among these, unsaturated carboxylic acid alkyl esters are preferable because they are remarkably excellent in impact resistance improving effect.

The rubber-based resin (B) is obtained by polymerizing the above-mentioned components. For example, the rubber-like polymer 30-80.
In the presence of 1 part by weight, preferably 40-70 parts by weight,
100% by weight, preferably 20-60% by weight of aromatic vinyl monomer and 99-0% by weight, preferably 80-4
It is obtained by polymerizing 70 to 20 parts by weight, preferably 60 to 30 parts by weight, of a monomer component consisting of 0% by weight of another monomer.

The method of polymerization is not particularly limited, but examples thereof include bulk-suspension polymerization, solution polymerization and bulk polymerization.

Among the rubber-based resins (B) thus obtained, styrene, (meth) acrylic acid and methyl (meth) acrylate are added to diene rubbers such as polybutadiene and polyisoprene because of their remarkable effect of improving impact resistance. , A copolymer resin obtained by copolymerizing one or more kinds of monomers selected from maleic anhydride and acrylonitrile is preferable, and a copolymer resin (MBS) obtained by graft-copolymerizing styrene and methyl methacrylate with polybutadiene is more preferable. Is preferable from the viewpoint of further increasing

The mixing ratio of the above-mentioned component (A) and component (B) is usually (A) / (B) = 50/50 to 90 by weight.
/ 10, in particular, the range of (A) / (B) = 60/40 to 80/20 is preferable from the viewpoint of excellent heat resistance and impact resistance.

The present invention not only improves the appearance of molded articles by using the above-mentioned resins (A) and (B) in combination with higher alcohols and / or phenols as the component (C). The impact resistance can be further improved. These higher alcohols and phenols can be used alone or in combination,
It is preferable to use phenols alone or in combination with higher alcohols because the effect of the present invention becomes remarkable.

The higher alcohol is not particularly limited, but it is preferable that the appearance of the molded product is particularly excellent, and specific examples thereof include a monovalent higher aliphatic alcohol having 6 or more carbon atoms, Preferred examples include stearyl alcohol, cetyl alcohol, olein alcohol, octyl alcohol, decyl alcohol, and lauryl alcohol.

The phenols are not particularly limited, and examples thereof include mononuclear phenols such as phenol, cresol, t-butylphenol, 2,4-di-t-butylphenol, catechol and resorcin, bisphenol A, bisphenol F, Examples thereof include bisphenols such as bisphenol S, phenol novolacs, cresol novolacs, resorcinol novolacs, and novolac compounds such as bisphenol A novolacs. Among them, bisphenols are preferable from the viewpoint of excellent appearance or impact resistance improving effect of the molded product.

The ratio of the above-mentioned higher alcohol and / or phenols used is not particularly limited,
It is preferable to use 0.05 to 0.5 parts by weight based on 100 parts by weight of the total of the components (A) and (B).

In the present invention, the impact resistance and the like can be further improved by adding an organic polysiloxane as the component (D). The organic polysiloxane used in the present invention has a general formula:

[0041]

[Chemical 1] (Provided that R1 and R2 represent an alkyl group, an aryl group or an aralkyl group, and R1 and R2 may be the same or different.) And indicate a polymer having a structural unit. Thus, a so-called homopolymer type organic polysiloxane having only one such structural unit or a random type, block type or graft type copolymer type organic siloxane obtained by combining two or more types may be used.

As such an organic polysiloxane,
Examples thereof include dimethyl polysiloxane, methylphenyl polysiloxane, diphenyl polysiloxane, and methylbenzyl polysiloxane.

When the thermoplastic resin composition of the present invention is obtained, these organopolysiloxanes are hard to volatilize under the thermal conditions such as heat-melt extrusion, and are not easily volatilized under the conditions. It is preferable that the change is unlikely to occur, and the content of the organic polysiloxane used in the present invention is 0.001 to 0.5% by weight, particularly 0.001 to 0.3% by weight. It is preferable to do so from the viewpoint of further improving the impact resistance.

The aromatic vinyl resin composition of the present invention can be manufactured by a manufacturing method usually used. That is, a method of mixing the components (A) to (C) using a tumbler, a heating roll, a Banbury mixer, a single-screw extruder, a twin-screw extruder, a single-screw-coupled extruder, or the like, (A)-
It can be produced by a method in which a mixture obtained by dry blending the component (C) with a tumbler is mixed using a heating roll, a Banbury mixer, a single screw extruder, a twin screw extruder, a single screw-two screw connecting extruder, or the like. . Further, it may be blended with a mixture of the resin (A) and the rubber resin (B) and used as a so-called masterbatch.

When the organic polysiloxane is used in combination, it can be added simply by blending it as a compounding agent. However, it may be blended with the resin (A) or the rubber-based resin (B) or the resin (A). It may be blended with a mixture of the rubber-based resin (B), higher alcohol and / or phenol, and used as a so-called masterbatch during resin production.

When the master batch is used in this way,
The impact resistance of the obtained thermoplastic resin composition is further improved. Particularly in the case of particles, higher impact resistance can be obtained by previously blending with a tumbler and then blending with another polymer.

The reason why the impact resistance of the thermoplastic resin composition obtained by adding the organic polysiloxane is remarkably improved is that the addition of the organic polysiloxane enables the dispersion state of the rubber component. As far as possible, the particles are dispersed in a shape close to a sphere, and it is presumed that the component of the organic polysiloxane plays a role as a surface coating layer of the sphere dispersion.

In the present invention, the components (A) to (C) or the components (A) to (C) blended with an organic polysiloxane may be used in combination with a resin having compatibility therewith. .

As such a resin, for example, polymethylmethacrylate or styrene-methylmethacrylate copolymer resin is preferable among (meth) acrylic acid esters, but the resin is not limited to this, and examples thereof include polyethylene, polypropylene, polyvinyl chloride and AS. Resin, ABS resin, polyvinyl alcohol, polyphenylene ether,
Vinylidene chloride resin, AAS resin, AES resin, fiber derivative resin, polyvinyl butyral, polymethylpentene-1, polybutene, polyisobrene, fluororesin, polyamide, polyacetal, polyester, polycaprolactone, polyphenylene sulfide, polysulfone, polyether, ether ketone , Cyclohexane resins, petroleum resins, thermoplastic resins such as (meth) acrylic acid modified polyethylene and acrylic acid modified polypropylene;
Or epoxy resin, phenol resin, urea resin,
It may be a thermosetting resin such as a melamine resin, a diaryl phthalate resin, a silicone resin, an unsaturated polyester resin, an alkyd resin or a urakid resin.

In the present invention, addition of an antioxidant can prevent thermal deterioration and prevent gelation.
As a result, the impact resistance and the appearance of the molded product can be made more remarkable. The antioxidant is not particularly limited, and any known and commonly used antioxidant can be used. For example, "Latest Technology of Polymer Additives" issued by CMC (1988).
Published in January of the year). The mixing ratio of the antioxidant is not particularly limited, but it is usually preferable to use it in a range of 0.05 to 1% by weight of the entire composition.

Further, by additionally using mineral oil, the fluidity is increased and the impact resistance is improved. The mineral oil is not particularly limited, and examples thereof include those described in JP-A-61-19648. The blending ratio of this mineral oil is not particularly limited, but it is usually preferable to use it in a range of 0.01 to 5% by weight of the entire composition.

The thermoplastic resin composition of the present invention thus obtained may further contain compounding agents such as UV absorbers, lubricants, flame retardants, antistatic agents and foaming agents which are usually used.

Among these compounding agents, the preferred compounding agents include saturated fatty acids and / or their esters described in JP-A-58-96641; JP-A-59-23004.
Hydroxyl compounds described in Japanese Patent Publication No. 3; triphenyl phosphate, tri (nonylphenyl) phosphate and their oligomers, polymer type phosphorus flame retardants; and others published by Taisei Co. (Feb. 62) Flame retardants described in "; and flame retardants such as tetrabromobisphenol A / epichlorohydrin copolycondensation polymer.

In addition to these, glass fiber, carbon fiber, metal fiber, glass beads, glass powder, glass flakes, asbestos, welllastonite, mica, talc, clay, calcium carbonate, calcium titanate,
A filler such as barium sulfate can be used alone or in combination.

These fillers are used in the thermoplastic resin composition 10
It is preferable to fill 1 to 150 parts by weight with respect to 0 parts by weight. The thermoplastic resin composition of the present invention thus obtained is further subjected to injection molding; film, sheet by axial, uniaxial stretching, biaxial stretching, etc .; board extrusion molding, vacuum molding, pressure molding, modified molding, extrusion. It can be used by molding into various molded products by foam molding, blow molding and the like.

The thermoplastic resin composition of the present invention has a wide range of uses and includes, for example, connectors, switches, timer parts, terminal blocks, adapters, relay parts, transformer parts,
Motor parts, volume shafts, and other parts in the electrical and electronic fields and cases; radio cassettes, video cameras, video tape recorders, audio players, air conditioners, humidifiers, rice cookers, humidifiers, telephones, etc. Parts, skins and housings; copiers,
OA for printer, facsimile, CRT disc play, personal computer, word processor, computer, register, etc.
Various parts and housings of equipment; instrument panel, upper garnish, radiator grill, cluster, speaker grill, curl vent grill, looper, hubcap, oil pipe, reservoir tank, pedal bush, wheel cap, headlamp lifter, air conditioner valve, Automotive interior and exterior parts such as crankcase covers, heater core tanks, rear spoilers, and body parts; cameras, slide projectors, watches,
Parts of precision machinery such as measuring instruments, etc .; parts and cases of general machinery such as pumps, fans, electric tools, spray nozzles, hoses, tubes, etc .; parts and housings of seawater desalination equipment, foam insulation sheets and Equipment for civil engineering / construction fields such as boards; films, foam sheets / boards, boards, audio cassettes and halves, video cassette cases and herbs, helmets, foam containers, tableware, baby bottles, toys , Chocolate types,
Daily sundries such as armor surfaces; medical equipment parts and cases, pharmaceuticals such as medicines, containers; window glass, greenhouse materials, machine safety covers, sheets and boards such as lead plates; food packaging Films such as materials and laminating materials; useful as foam sheets and boards such as food containers, cushioning materials, automobile ceiling materials, and heat insulating materials.

[0057]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.

The parts and% shown below are based on weight unless otherwise specified. Further, various physical properties were determined by the methods described below. Heat distortion temperature: ASTM D-648 Impact resistance: DuPont impact strength was measured according to JIS K7211. (Hit core, pedestal 1/2 inch φ) Measured value is 50% impact fracture value Appearance of molded product: A test piece was molded using a vertical type 10z injection molding base, and the cylinder temperature and in the cylinder were measured. The generation state of silver streaks on the surface of the molded product when the residence time was changed was visually evaluated.

⊚: Silver streak was not observed at all, and the appearance was very excellent. ○: The silver streak is not noticeable and the appearance is good.

X: Silver streak was conspicuous and the appearance was poor. [Preparation of Aromatic Vinyl-Based Resin (A)] Reference Example 1 A 5 liter stainless steel reactor equipped with a turbine-type stirring blade was charged with 2,000 ml of distilled water, and 10 g of partially saponified polyvinyl alcohol as a suspension stabilizer and After dissolving 0.05 g of sodium dodecylbenzene sulfonate,
Styrene 870 g, methacrylic acid 130 g, liquid paraffin 10 g, peroxyhexahydroterephthalic acid di-
4 g of tert-butyl and 1 g of tert-butyl perbenzoate were sequentially charged. After replacing the inside of the container with nitrogen gas, 5
The temperature was raised under stirring at 00 rpm, suspension polymerization was carried out at 90 ° C. for 10 hours, and further reaction was carried out at 120 ° C. for 3 hours. The produced granular styrene-methacrylic acid copolymer resin was washed, dehydrated and then dried.

Reference Example 2 Reference Example 1 except that each monomer was used in the composition shown in Table 2.
In the same manner as above, copolymer resins (A-2) to (A-3) were obtained.

Table 2 shows the measurement results of the weight average molecular weight (Mw) of (A-1) to (A-3).

[0063]

[Table 2]

Examples 1 to 12 and Comparative Examples 1 to 3 Components of the compositions shown in Tables 3 to 6 were mixed in a tumbler, and then melted, kneaded and extruded by a 30 mmφ extruder at a temperature of 220 ° C. to 250 ° C. After that, it was pelletized, and various physical properties were measured using this. In addition, the compounding amounts of the components (A) and (B) in Tables 3 to 4 are weight ratios with respect to 100 parts by weight of the total of the components (A) and (B), and the compounding ratios of the other components are resin. The weight ratio is shown when the total weight of the composition is 100%.

[0065]

[Table 3]

[0066]

[Table 4]

[0067]

[Table 5]

[0068]

[Table 6] In Tables 3 to 6, "MBS" is a polybutadiene-graft-styrene-tylmethacrylate copolymer (polymerized at a weight ratio of styrene / methacrylate = 20/80 and a rubber content of 60% by weight), "C-3" is stearyl alcohol ("NAA-45" (trade name) manufactured by NOF CORPORATION) "C-2" is cetyl alcohol ("NAA-44" (trade name)
Nippon Oil & Fats Co., Ltd. "C-1" is lauryl alcohol ("NAA-42" (trade name) Nippon Oil & Fats Co., Ltd.) "C-4" is bisphenol A organic polysiloxane is "SH-200" ( Product name, manufactured by Asahi Denka Kogyo Co., Ltd. "E-1" is "ADEKA ARGUS AO-50" (product name,
Asahi Denka Kogyo Co., Ltd. "E-2" is ("Sumilyzer GM" (trade name, manufactured by Sumitomo Chemical Co., Ltd.) "E-3" is "Sumilyzer GM" and "Sumilyzer T"
PD ”(trade name, manufactured by Sumitomo Chemical Co., Ltd.), respectively, and HDT represents heat distortion temperature.

[0069]

According to the present invention, it is possible to provide a resin composition having excellent impact resistance and excellent appearance of a molded product.

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Claims (11)

[Claims] 1. An aromatic vinyl resin (A), a rubber resin (B), a higher alcohol and / or a phenol (C).
An aromatic vinyl-based resin composition comprising: 2. The composition according to claim 1, wherein the higher alcohol and / or phenol (C) is a monovalent alcohol having 6 to 20 carbon atoms. 3. The composition according to claim 1, wherein the rubber-based resin (B) is a rubber-based resin containing an aromatic vinyl-based monomer as one component. 4. The composition according to claim 1, wherein the aromatic vinyl resin (A) is a copolymer of an aromatic vinyl monomer and an unsaturated carboxylic acid. 5. The composition according to claim 4, wherein the rubber-based resin (B) is a copolymer having styrene and rubber as essential components. 6. The composition according to claim 4, wherein the rubber resin (B) is a graft copolymer of polybutadiene, methyl (meth) acrylate and styrene. 7. The blending ratio of the higher alcohol and / or the phenols (C) is 1 in total of the components (A) and (B).
The composition according to claim 1, which is 0.05 to 0.5 parts by weight with respect to 00 parts by weight. 8. The composition according to claim 1, further comprising an organic polysiloxane. 9. The composition according to claim 8, wherein the content of the organic polysiloxane is in the range of 0.001 to 0.2% by weight based on the whole. 10. The total amount of the antioxidant is 0.05 to 1.
The composition according to any one of claims 1 to 9, which is contained in a range of wt%. 11. Further, 0.01 to 5% by weight of the total amount of mineral oil is added.
The composition according to any one of claims 1 to 10, which is contained in the range of.