JPH0218439A - Thermoplastic resin composition - Google Patents

Abstract

PURPOSE:To obtain a thermoplastic resin composition having excellent impact resistance, weld strength, appearance of molded product, etc., by compounding a specific styrene copolymer, a styrene polymer, a polyamide polymer and/or a polyester polymer and an organic phosphoric or phosphorous acid compound. CONSTITUTION:The objective composition is produced by compounding (A) 5-80wt.% of a styrene copolymer copolymerized with 0.1-8wt.% of an unsaturated compound containing COOH group, (B) 5-85wt.% of a styrene polymer (e.g. ABS resin or MS resin) and (C) 10-90wt.% of a polyamide polymer and/or a polyester polymer and mixing 100pts.wt. of the obtained mixture with (D) 0.1-10pts.wt. of an organic phosphoric or phosphorous acid compound. The content of the COOH-containing unsaturated compound in the whole composition is 0.02-4wt.%, the content of rubber component is 5-40wt.%, the intrinsic viscosity of the matrix component in the components A and B is >=0.35dl/g and the average grafting ratio to the rubber component is >=30wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a thermoplastic resin composition that has excellent impact resistance, moldability, chemical resistance, and weld strength, and has a good appearance.

b. Conventional technology Polyamide resins such as nylon-6, nylon-66, nylon-12, and nylon-46, and polyester resins such as polyethylene terephthalate and polyethylene terephthalate have various excellent properties. It is used in many fields such as plastic products and films. However, polyamide resins and polyester resins do not have very good impact resistance, and have the disadvantage that impact resistance is particularly low when notches are added.

Due to these drawbacks, the above-mentioned materials have not always been satisfactory for a wider range of applications.

Therefore, many methods have been reported to blend rubber or rubber-reinforced resins in order to improve the impact resistance, but these methods cannot sufficiently improve the impact resistance of polyamide resins and polyester resins. The weld strength and molded appearance are also insufficient.

Problems to be solved by the C0 invention As described above, depending on the conventional method, polyamide resin,
It was not possible to sufficiently improve the impact resistance, weld strength, and molded appearance of polyester resin.

As a result of intensive studies to solve the above-mentioned drawbacks, the present inventors found that (A) a styrene copolymer copolymerized with a carboxyl group-containing unsaturated compound, (B) a styrene polymer, (C
) A composition comprising a polyamide resin and/or polyester resin and (D) an organic phosphorous acid compound has been found to be excellent in impact resistance, molding processability, chemical resistance, weld strength, and molded appearance, We have arrived at the present invention.

61 Means for Solving the Problems The thermoplastic resin composition of the present invention comprises (A) 5 to 80% by weight of a styrene copolymer copolymerized with a carboxyl group-containing unsaturated compound, (B) a styrene copolymer. To 100 parts by weight of a mixture consisting of 5 to 85% by weight of the combined material and 10 to 90% by weight of (C) a polyamide polymer and/or a polyester polymer, 0.1 to 0.1 to 100% of (D) an organic phosphorous acid compound is added.
10 parts by weight, and (a) the content of the carboxyl group-containing unsaturated compound in the entire composition is 0.
02 to 4% by weight, (b) the content of the rubber component in the entire composition is 5 to 40% by weight, and (c) (A) and (
It is characterized in that the matrix component in component B) has an intrinsic viscosity (30° C., methyl ethyl ketone) of 0.35 dl/g or more.

The styrenic copolymer (A) in which the carboxyl group-containing unsaturated compound is copolymerized is a carboxyl group-containing unsaturated compound in the absence or presence of a rubbery polymer,
It is a copolymer formed by polymerizing an aromatic vinyl compound and, if necessary, other monomers copolymerizable with these. From the viewpoint of heat resistance, the polymerization is preferably carried out in the absence of a rubbery polymer.

Examples of the carboxyl group-containing unsaturated compound in component (A) include acrylic acid, methacrylic acid, crotonic acid, cinnamic acid, itaconic acid, and maleic acid, with acrylic acid and methacrylic acid being preferred. These may be used alone or in combination of two or more.

As the aromatic vinyl compound of component (A), styrene,
α-Methylstyrene, methylstyrene, vinylxylene, monochlorostyrene, dichlorostyrene, monobromstyrene, dibromstyrene, p-tert-butylstyrene, ethylstyrene, vinylnaphthalene, 0-methylstyrene, P-methylstyrene, dimethyl These include styrene, and these can be used alone or in combination of two or more. Among these, a preferable aromatic vinyl compound is styrene, and when two or more types of aromatic vinyl compounds are used together, it is preferable to use styrene in a proportion of 50ffi1% or more.

Examples of monomers copolymerizable with carboxyl group-containing unsaturated compounds and aromatic vinyl compounds include maleimide compounds, vinyl cyan compounds, and other vinyl compounds.

Examples of maleimide compounds include maleimide, N-
Methylmaleimide, N-ethylmaleimide, N-phenylmaleimide, N-0-chlorophenylmaleimide, N
-cyclohexylmaleimide and the like, particularly preferably N-phenylmaleimide, No-chlorophenylmaleimide, N-cyclohexylmaleimide, etc., and these can be used alone or in combination of two or more.

Examples of the vinyl cyanide compound include acrylonitrile and metacyclonitrile, and among these, acrylonitrile is preferred.

Other copolymerizable vinyl compounds include alkyl esters of acrylic acid such as methyl acrylate, ethyl acrylate, and propylene acrylate; alkyl esters of methacrylic acid such as methyl methacrylate, ethyl methacrylate, and propylene methacrylate; One type or two or more types can be used in combination.

Moreover, although a rubbery polymer is not necessarily required, when used, the following rubbery polymers are preferable.

Copolymers of ethylene and α-olefins such as ethylene-propylene random copolymers and block copolymers, ethylene-butene random copolymers and block copolymers; ethylene-methacrylate, ethylene-butyl acrylate, etc. Copolymers of ethylene and unsaturated carboxylic acid esters; copolymers of ethylene and fatty acid vinyl such as ethylene-vinyl acetate; ethylene such as ethylene-propylene-ethylidenenorbornene copolymers and ethylene-propylene-hexadiene copolymers -Propylene-non-conjugated polymer; polybutadiene, isoprene, styrene-butadiene random copolymers and block copolymers, hydrogenated products of the block copolymers, acrylonitrile-butadiene copolymers, butadiene-isoprene copolymers There are diene rubbers such as polymers; butylene-isoprene copolymers, etc., and these can be used alone or in combination of two or more.

Among these, preferred rubbery polymers in terms of impact resistance and the like are diene rubber, ethylene-propylene rubber, and ethylene-propylene non-conjugated genter polymer. More preferred are polybutadiene and styrene-butadiene copolymers, and the styrene content in this styrene-butadiene copolymer is preferably 50% by weight or less from the viewpoint of impact resistance.

Specific examples of component (A) include the following types.

1) A copolymer containing an unsaturated compound containing a carboxyl group and an aromatic vinyl as essential components, 2) A monomer containing an aromatic vinyl and an unsaturated compound containing a carboxyl group as essential components in the presence of a rubbery polymer. A graft copolymer obtained by copolymerizing 3) l) and 2).

In 1) to 3) above, styrene is preferred as the aromatic vinyl, and acrylonitrile is preferred as the monomer copolymerized with the aromatic vinyl.

Carboxyl group-containing unsaturated compound is 0.1 in component (A)
It is preferably 8% by weight, more preferably 0.2-7% by weight, particularly preferably 0.3-7% by weight. If it is less than 0.1% by weight, impact resistance and weld strength will be low, and if it exceeds 8% by weight, impact resistance, moldability, weld strength and molded appearance will be poor. Further, the content of the carboxyl group-containing unsaturated compound in the entire composition is 0.02 to 4% by weight, preferably 0.05 to 3.5% by weight, and more preferably 0.1 to 3% by weight. It is. If it is less than 0.02% by weight, the impact resistance and weld strength will be low, and if it exceeds 4% by weight, the impact resistance, molding processability, weld strength and molded appearance will be poor.

In the composition of the present invention, the blending ratio of the styrenic copolymer (A) copolymerized with a carboxyl group-containing unsaturated compound is 5
-80% by weight, preferably 5-70% by weight, more preferably 5-65% by weight.

If it is less than 5% by weight, impact resistance will be poor; if it exceeds 80% by weight, moldability and appearance will be poor.

The styrenic polymer CB) contains an aromatic vinyl compound as an essential component, in the presence or absence of a rubbery polymer, and optionally contains a maleimide compound, a vinyl cyanide compound, and other copolymerizable vinyl monomers. A small number selected from the mass (
Both are polymers made by polymerizing a resin component consisting of one type of monomer.

The rubbery polymer, aromatic vinyl compound, maleimide compound, and other vinyl monomer copolymerizable with these are the same as those shown for component (A).

The styrenic polymer (B) is a polymer obtained by polymerizing a resin component monomer in the presence of a rubbery polymer, and a polymer obtained by polymerizing a resin component monomer in the absence of a rubbery polymer. It may also be a composition with other resins.

Specific examples of the above styrene polymer (B) include acrylonitrile-butadiene rubber-styrene resin (ABS resin), acrylonitrile-ethylene propylene rubber-
Styrene resin (IIBS resin), acrylonitrile-butadiene rubber-methyl methacrylate-styrene resin (BSM resin), acrylonitrile-styrene copolymer (
AS resin), methyl methacrylate-styrene copolymer (
MS resin), high impact polystyrene (HIPS)
, acrylonitrile-n-butyl acrylate rubber-styrene resin (AAS resin), and the like.

The proportion of the styrenic polymer (B) in the composition is 5 to 85% by weight, preferably 7 to 80% by weight, and more preferably 10 to 75% by weight. If the content of component (B) exceeds 85% by weight, the weld strength will deteriorate. If it is less than 5% by weight, impact resistance is poor. When polyamide is selected as component (C), the preferred blending ratio of component (B) is 10 to
80% by weight, and as a result, a thermoplastic resin composition having excellent impact resistance and molded appearance can be obtained.

The content of the rubber component in the entire composition is 5 to 40% by weight, preferably 6 to 38% by weight, more preferably 7 to 35% by weight.
Weight%. If it is less than 5% by weight, the impact resistance will be low;
If the amount exceeds % by weight, fluidity and gloss will deteriorate.

The average grafting rate of the monomer to the rubber component in the entire composition of the present invention is preferably 30% by weight or more, more preferably 40% by weight or more, particularly preferably 50 to 150% by weight. If it is less than 30% by weight, the appearance of the molded product will be affected by the molding temperature and the gloss will decrease.

Here, the graft ratio was measured by the following method.

Accurately weigh 1 g of the material, add 20 cc of acetone to it, shake it for 10 hours, and then shake it at a rotation speed of 20.0 OO.
The mixture was separated into a soluble portion and an insoluble portion using an rpa+ centrifuge, and the insoluble portion was dried using a vacuum dryer to obtain an insoluble portion (C).

- On the other hand, the amount of rubber (R) in the insoluble matter (C) was calculated from the polymerization composition and the polymerization conversion rate, and the grafting rate was determined from the following formula.

Further, the matrix component in the components (A) and CB) is the acetone soluble component in the components (A) and (B). The intrinsic viscosity of the matrix (solvent methyl ethyl ketone at 30"C) is greater than or equal to 0.35 dl/g, preferably between 0.4 dl/g and Ldl/g. 0.35 dl/g.
When it is less than 1/g, impact resistance and weld strength become low.

The polyamide polymer (C) of the present invention is not particularly limited, but examples include ethylenediamine, tetramethylenediamine, hexamethylenediamine, decamethylenediamine, dodecamethylenediamine, 2.24 and 2,4.
4-)limethylhexamethylenediamine, 1,3 and 1,4-bis(aminomethyl)cyclohexane, bis(
Aliphatic, alicyclic, aromatic diamines such as p-aminocyclohexyl)methane, m-xylylene diamine, p-xylylene diamine, adipic acid, superric acid, sebacic acid, cyclohexanedicarboxylic acid, terephthalic acid, isophthalic acid, etc. polyamides derived from aliphatic, alicyclic, and aromatic dicarboxylic acids; polyamides obtained by ring-opening polymerization of lactams such as ε-caprolactam and ω-dodecalactam; 6-aminocaproic acid, 1,1 aminoundecanoic acid Nylon-6 (polycaproamide), nylon-6 (polycaproamide), polyamide derived from 1,2-aminododecanoic acid, copolyamides thereof, and mixed polyamides, which are industrially produced at low cost and in large quantities.
66 (polyhexamethylene adipamide), nylon-1
Useful are nylon-2 (polydodecamide), nylon-610 (polyhexamethylene diamine), nylon-46, and copolymers and mixtures thereof.

The degree of polymerization of the polyamide polymer (C) used here is not particularly limited, and usually has a relative viscosity (1 g of polymer is 9
Any polyamide resin having a polyamide resin dissolved in 100 m of 8% HtSOa (measured at 25°C) in the range of 1.8 to 6.0 can be used, but those in the range of 2 to 5 can be used. A product with an excellent balance of impact resistance and moldability can be obtained. There is no restriction on the molecular structure of the polyamide, and it may be either a linear polyamide or a branched polyamide.

The polyester polymer (C) used in the present invention is not particularly limited, but is one obtained from a polycondensate of a dicarboxylic acid or a derivative such as an alkyl ester of a dicarboxylic acid and a diol. 70 to 100 of the portion composed of dicarboxylic acid among the constituent components of polyester
Mol% is introduced by terephthalic acid,
30 to 0 mol% was introduced by isophthalic acid, terephthalenedicarboxylic acid, adipic acid, sebacic acid, etc. The moiety composed of glycol is introduced by ethanediol, propanediol, butanediol, bentanediol, and hexanediol, and may be composed of two or more of these types. There may also be a portion introduced by oxybenzoic acid or bisphenol A, and mixed polyesters containing one or more of these polyesters are also included within the scope of the present invention. Such polyesters include polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate, and copolymers and mixtures thereof.

When component (C) in the composition is a polyamide polymer, the blending ratio is 10 to 90% by weight, preferably 10% by weight.
~80% by weight. If it is less than 10% by weight, moldability and chemical resistance are poor, and if it exceeds 90% by weight, impact resistance, weld strength and molded appearance are poor. When component (C) is a polyester polymer alone or a mixture of a polyester polymer and a polyamide polymer, the blending ratio is 10 to 90% by weight, preferably 10 to 80% by weight. If it is less than 10% by weight, molding processability and chemical resistance will be poor, and if it exceeds 90% by weight, impact resistance, weld strength and molded appearance will be poor.

Note that there is no particular restriction on the mixing ratio of the polyamide polymer and the polyester polymer, and they can be mixed and used in any ratio.

Organic phosphoric acid compound and/or organic phosphorous acid compound C
Various types of D) can be used, including phosphoric acid esters or phosphorous acid esters of organic groups, and various organic groups such as aliphatic groups and aromatic groups can be used. Among them, the most preferred organic phosphoric acid compound (D) is one represented by General 2 (1).

Specifically, distearyl pentaerythritol diphosphite, -butylphenyl pentaerythritol diphosphite, in which R and R2 are Cl1l[137,
Alternatively, -butyl-4-methylphenyl)pentaerythritol diphosphite is preferred.

The blending ratio of the organic phosphorous acid compound (D) in the composition of the present invention is (A) + (B) + (C) = too
The amount is 0.1 to 10 parts by weight, preferably 0.1 to 8 parts by weight, and more preferably 0.1 to 5 parts by weight, based on 100 parts by weight of the resin mixture. If it is less than 0.1 part by weight, impact resistance cannot be expected. Moreover, if the amount is 10 parts by weight or more, the heat resistance will be extremely reduced.

Addition of component (D) is effective in improving impact resistance, particularly at low temperatures. This is an effect that cannot be predicted from conventional techniques.

A conventional method is used to mix components (A) to (D) of the composition of the present invention. For example, the components may be mixed in a mixer, then melt-kneaded in an extruder at 200 to 320° CT and granulated. More simply, each component can be directly melt-kneaded and molded in a molding machine.

However, in order to further improve impact resistance, (8)
This can be achieved by first melt-kneading the components and the (C) component at 200 to 320°C, then adding the (B) component and the (D) component and kneading them again. The kneading temperature at this time is 200 to 320°C, and the kneading time is not particularly limited as long as it is 30 minutes or more.

The compositions of the invention may include antioxidants such as 2.6 g-L-
Butyl-4-methylphenol, 2-(1methylcyclohexyl)-4,6-dimethylphenol, 2,2-methylene-bis-(4-ethyl-6-butylphenol), tris(di-nonylphenyl) Phosphites; UV absorbers such as pt-butylphenyl salicylate, 2,2'-dihydroxy-4-methoxybenzophenone, 2-(2'-hydroxy-4'-m-octoxyphenyl)benzotriazole; lubricants such as paraffin wax , stearic acid, hydrogenated oil, stearamide, methylene bisstearamide, n-butyl stearate, ketone wax, octyl alcohol, hydroxystearic acid triglyceride; flame retardants such as antimony oxide, aluminum hydroxide, zinc oxalate, tricresyl phosphate, tris(dichloropropyl) phosphate, chlorinated paraffin, tetrabromobutane, hexabromobenzene, tetrabromobisphenol A; antistatic agents such as stearamidopropyl dimethyl-β-hydroxyethyl, ammonium drate; colorants such as titanium oxide, Carbon black; fillers such as calcium carbonate, clay, silica, glass fibers, glass spheres, carbon fibers; pigments, etc. can be added as necessary. These additives may be added to the composition at any point.

e. Examples Next, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto.

A styrenic copolymer resin copolymerized with a carboxyl group-containing unsaturated compound as component (A) was produced in the following manner.

(1) Production of styrenic copolymers copolymerized with carboxyl group-containing unsaturated compounds (A-1 to A-3, ^-5 to A
-8): 300 ml of ion-exchanged water in a 71 glass flask with a stirrer
1 part, 2.0 parts of sodium dodecylbenzenesulfonate and 0.3 parts of t-dodecylmercaptan, and Table 1
Batch polymerization components consisting of various monomers were added in the proportions shown in , and the temperature was raised while stirring. When the temperature reached 40°C, 0.1 part of potassium persulfate was added and the reaction continued for 2 hours. The resulting resin latex was coagulated using 2 parts by weight of potassium chloride, dehydrated, washed with water, and dried to recover a powdered resin.

(2) Production of styrenic copolymer copolymerized with carboxyl group-containing unsaturated compound (A-4): 7I equipped with a stirring blade! , 100 m of ion-exchanged water in a glass flask,
Sodium dodecylbenzenesulfonate 0.5 part, potassium hydroxide 0.01 part, t-dodecylmercaptan 0.
1 part and a batch polymerization component consisting of various monomers of A-4 shown in Table 1 were added, and the temperature was raised while stirring. temperature is 4
When the temperature reached 5°C, an active solution consisting of 0.1 part of ethylenediaminetetraacetic acid sodium salt, 0.003 part of ferrous sulfate, 0.2 part of formaldehyde sodium sulfoxylate trihydrate, and 15 parts of ion-exchanged water was added. and 0.1 part of diisopropylbenzene hydroperoxide were added, and the reaction was continued for 1 hour.

Next, 50 parts of ion-exchanged water, 1 part of sodium dodecylbenzenesulfonate, 0.02 parts of potassium hydroxide, t
- A mixture of incremental polymerization components consisting of 0.1 part of dodecyl mercaptan, 0.2 part of diisopropylbenzene hydroperoxide, and various monomers in the proportions shown in Table 2 was added continuously over a period of 3 hours, and the reaction was continued. Ta.

After the addition was completed, the reaction was continued for 1 hour with further stirring, and then 2,2-methylene-bis-(4-ethyl-6-t-
0.2 parts by weight (butylphenol) was added, and the reaction product was taken out from the flask. The product was coagulated using 2 parts by weight of potassium chloride, dehydrated, washed with water, and dried.
Powdered graft resin was collected.

Table 1 shows the monomer polymerization conversion rate, the grafting rate, and the intrinsic viscosity [η] measured by the method described above.

Rubbery polymer ^-4 shown in Table 1 was polymerized as follows.

A polymerization reaction was carried out using a stainless steel polymerization reactor equipped with four-stage paddle blades and having an internal volume of 1 oz under the recipe and conditions shown in Table 2. The temperature was raised with stirring at a paddle blade rotation speed of 9 Orpm, and when the temperature reached 50°C, potassium persulfate was added. From then on, the polymerization reaction was carried out while controlling the reaction temperature to be kept constant at 50°C. When the polymerization rate reached 90%, 0.1 part by weight of diethylhydroxyamine was added to stop the reaction, and the unreacted monomer was substantially distilled off by steam distillation to obtain a rubbery latex. Ta.

Table-2 [Formulation and conditions of R-1] 1, 3-butadiene (parts by weight) 100 Sodium dodecylbenzenesulfonate 1.5 Potassium chloride
1.0 potassium hydroxide
0.12 potassium persulfate
0.25 Ion-exchanged water Polymerization temperature (°C) Polymerization time (hrs) Weight percentage (%) Average particle size (λ) (*) Measured using Nanosizer (manufactured by Nippon Kagaku Kikai Co., Ltd.).

(B) Components (B-1-B-5) are shown in Table-3.

Table-3 The following was used as component (C).

C-1: Nylon 6: Toshi Amiran CM1017C-
2: PBT (polybutylene terephthalate): Polyplastic Duranex XD499 Examples 1 to 12
, Comparative Examples 1 to 7 Components (A) and (C) in Table 4 were melt-kneaded at a temperature of 250°C using a four-way extruder to produce pellets. This pellet, component (B) and component (D) were added again for 40 m
Pellets were prepared by melting and kneading at a temperature of 250°C using a /m extruder.

Example 13, Comparative Example 8 Components (A) to (D) in Table 4 were melt-kneaded using a 40 s/m extruder at a temperature of 250°C to produce pellets.

The pellets produced as described above and the pellets of Comparative Example 9 were each molded using a 50Z injection molding machine (Toshiba Is 80A) at a molding temperature of 260° C. to prepare test pieces.

The physical properties of the obtained test piece were evaluated by the following method.

The results are shown in Table 4.

Melt flow index (MFR: measurement condition: 260°C11C11O) was measured in accordance with Gokisho JISK7210.

■Izod Imp impact strength (ASTM D2561/4' notched 23°) (hereinafter referred to as Izod Imp) was measured.

Glossiness of Sokosugimasu appearance test piece (ASTM D52323°C245°
) was measured.

■A constant strain with a strain rate of 1% was applied to the Tomasu blood specimen (I/8″ x 172″ x 5#), and the deflected portion was filled with dioctyl phthalate
It's called DOP. ) and brake fluid, and
The sample was left at 3°C and the time taken to break was measured.

(○ indicates a case where no breakage or crack occurs for 100 hours or more.) Weld - ゛A mold is used to form an ASTM No. 1 dumbbell with a weld line in the center, and the tensile strength (Tn) is measured. Next, the test piece made from the mold without weld lines was pulled (T
o) was measured.

Weld strength retention was determined using (Tw/To) x 100%.

Drum test specimen (172″ x l/2″ x 5″) at 4.6 kg/c
As is clear from the results shown in Table 4 in which the heat strain temperature (HDT) was determined by increasing the temperature under a load (ASTM D648), according to Examples 1 to 13, the thermoplastic resin composition targeted by the present invention was obtained. things are being obtained. On the other hand, Comparative Example 1~
No. 9, the composition targeted by the present invention cannot be obtained.

That is, in the compositions of Comparative Examples 1 and 2, the blending ratio of component (D) was outside the range of the present invention, and in Comparative Example 1, the impact resistance (
1mρ) is low. Comparative Example 2 has low heat resistance.

In the composition of Comparative Example 3, the component (A) is a component that does not contain carboxyl group-containing unsaturation and has low impact resistance. The composition of Comparative Example 4 has low impact resistance because the (A) component and (B) component do not contain a rubbery body. The composition of Comparative Example 5 has a high blending ratio of carboxyl group-containing unsaturated compounds, so it has poor impact resistance, weld strength retention, and MF.
R and low gloss.

The composition of Comparative Example 6 has a low intrinsic viscosity [η] of the matrix component in component (A) and a low grafting rate of component (B), so the retention rate of impact resistance, glossiness, and weld strength is low.

Since the composition of Comparative Example 7 has a low [η] of the matrix in the components (A) and (B), it has low impact resistance, gloss, and weld strength retention.

The composition of Comparative Example 8 does not contain component (C) (nylon 6), and therefore has low impact resistance, MFR, chemical resistance, gloss, and heat resistance.

The composition of Comparative Example 9 uses nylon-6 alone and has low impact resistance.

f. Effects of the Invention Currently, in the molding industry that uses thermoplastic resins, the characteristics required of molded products tend to become more complex as the applications of molded products become more diverse. In order to obtain such a molded article, it is required to have better impact resistance, moldability, chemical resistance, and weld strength than conventional molded articles.

However, conventional polyamide resins, polyester resins, and compositions thereof have not been able to fully meet this demand.

The composition of the present invention has a highly balanced impact resistance, moldability, chemical resistance, and weld strength, and can fully meet the above requirements.

Furthermore, the composition of the present invention is a molding material that improves the drawbacks of conventional polyamide resins, polyester resins, etc. and satisfies the demands of the molding industry, and has great industrial value.

Claims (2)

[Claims] (1) (A) 5-80% by weight of a styrenic copolymer copolymerized with a carboxyl group-containing unsaturated compound (B) 5-85% by weight of a styrene-based polymer (C) Polyamide-based polymer and/or A composition containing 0.1 to 10 parts by weight of (D) an organic phosphoric acid compound and/or an organic phosphorous acid compound to 100 parts by weight of a mixture consisting of 10 to 90% by weight of a polyester polymer, ) (A) The content of the carboxyl group-containing unsaturated compound in the whole composition is 0.02 to 4% by weight, and (B) The content of the rubber component in the whole composition is 5 to 40% by weight. (c) The intrinsic viscosity of the matrix component in components (A) and (B) (30°C, methyl ethyl ketone) is 0.35 d.
1/g or more. A thermoplastic resin composition. (2) The content of the carboxyl group-containing unsaturated compound in component (A) is 0.1 to 8% by weight, and the average grafting rate to the rubber component in the entire composition is 30% by weight or more. A thermoplastic resin composition according to claim (1).