JPS6225148A - Thermoplastic resin composition having excellent residence heat-stability - Google Patents

Abstract

PURPOSE:To obtain a thermoplastic resin composition having remarkably improved heat-resistance and residence thermal stability, by compounding a phosphoric acid ester and an organic carboxylic acid to a composition composed of an imidated copolymer and a polyester or polycarbonate. CONSTITUTION:The objective composition can be produced by compounding (A) 100pts.(wt.) of a thermoplastic resin containing (A1) 2-98(wt)% imidated copolymer composed of 0-40% rubbery polymer, 30-90% aromatic vinyl monomer residue and 3-70% unsaturated dicarboxylic acid imide residue, (A2) 2-98% one or more polymers selected from polycarbonate and polyester and (A3) 0-70% thermoplastic polymer with (B) 0.01-1.00pts. of an organic phosphoric or phosphorous acid ester, acidic phosphoric or phosphorous acid ester and/or their metallic salts and (C) 0-5pts. of an organic carboxylic acid or its anhydride.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a thermoplastic resin composition having excellent heat resistance and retention heat stability. It can be preferably used for office equipment parts, heating appliances, etc.

(Prior Art and Problems) Conventionally, compositions made of a copolymer having an imide group in the side chain and one or more polymers selected from polycarbonate and/or polyester have excellent heat resistance and mechanical properties. It is widely known that it has the following properties.

For example, a resin composition consisting of a copolymer of styrene and maleimide and polycarbonate (U.S. Pat. No. 4,160,
No. 792), a rubber-modified imidized copolymer prepared by polymerizing a monomer mixture of styrene and maleic anhydride with ammonia and/or a primary amine in the presence of a rubbery block copolymer. Resin composition consisting of polymer and polycargonate (US Pat. No. 4,122°130)
, and an imidized copolymer obtained by reacting a copolymer of styrene and maleic anhydride with ammonia and/or a primary amine, and a copolymer of styrene, acrylonitrile, and these in the presence of a comb-like polymer. A resin composition comprising at least one polymer selected from Tobori Cargonate, a graft copolymer prepared by copolymerizing a monomer mixture comprising available vinyl monomers, and a polyester resin (JP-A-5
7-125241).

However, the better the heat resistance of these compositions, the higher the molding temperature, so if they remain in the cylinder during molding, they will decompose in a very short time, making it impossible to obtain a good molded product. It has a problem of poor retention thermal stability, which causes a significant drop in impact strength.

The present inventor has discovered that the retention heat stability during molding of a resin composition comprising a copolymer having an imide group and one or more polymers selected from polycargonates and/or polyesters,
In particular, with the aim of improving the retention thermal stability during high-44 molding, the present invention was achieved through extensive research.

(Another Means to Solve the Problems) The present invention consists of components (4): 0 to 40% by weight of a rubbery polymer, 30 to 90% by weight of aromatic vinyl monomer residues, and the remainder of unsaturated zocargen imide derivatives. 2-98% by weight of an imidized copolymer consisting of 3-70% by weight of groups and 0-40% by weight of vinyl monomer residues other than these residues, and (B) component: polycargonate and/or polyester. 2 to 98% by weight of one or more polymers selected from Component (C): 0 to 70% by weight of a thermoplastic polymer, per 1 oz part of a thermoplastic resin, an organic phosphate ester , organic phosphites, acid phosphates,
Acidic phosphate esters and/or their metal salts0.
01 to 1.0 parts by weight, and further organic cal? The present invention is a thermoplastic resin composition characterized by containing 0 to 5 parts by weight of phosphoric acid and/or organic carb/acid anhydride.

First, the imidized copolymer of component A and its manufacturing method will be explained.

(A) As a method for producing the component copolymer, in the first production method, if necessary, in the presence of a comb polymer, an aromatic vinyl monomer, an unsaturated nocarboxylic acid imide derivative, and a vinyl copolymerizable with these are used. A method of copolymerizing a monomer mixture, if necessary in the presence of a rubbery polymer as a second production method, an aromatic vinyl monomer, an unsaturated dicarboxylic acid anhydride, and a vinyl monomer mixture copolymerizable with these. A method for converting 40 to 100 moles of acid anhydride groups into imide groups by reacting ammonia and/or a primary amine with a copolymerized polymer is mentioned. can be obtained.

Aromatic vinyl monomers used in the production of the first component A copolymer include styrene monomers such as styrene, α-methylstyrene, vinyltoluene, t-butylstyrene, chlorostyrene, and substituted monomers thereof. Of these, styrene is particularly preferred.

Examples of unsaturated socarboxylic acid imide derivatives include maleimide, N-methylmaleimide, N-butylmaleimide, N-
Cyclohexylmaleimide, N-arylmaleimide (
Aryl groups include examples t haphenyl, 4-diphenyl, ■-naphthyl, 2-chlorophenyl 4y% romophenyl and other mono- and nohalophenyl isomers,
Examples include 2°4.6-toIJ bromophenyl and methoxyphenyl. ), and itaconic acid imide derivatives such as N-methyl itaconic acid imide and N-phenyl itaconic acid imide.

The aromatic vinyl monomer used in the second production method is as described above, and the unsaturated dicarzenic acid anhydride includes anhydrides such as maleic acid, itaconic acid, citraconic acid, and aconitic acid. Maleic anhydride is particularly preferred.

Vinyl monomers that can be copolymerized with these include vinyl cyanide monomers such as acrylonitrile, methacrylonitrile, and α-chloroacrylonitrile, and acrylic ester monomers such as methyl acrylate and ethyl acrylate. , methacrylic acid ester monomers such as methyl methacrylic acid ester and ethyl methacrylic acid ester, vinyl carboxylic acid monomers such as acrylic acid and methacrylic acid, acrylamide, methacrylic acid amide, etc. Among these, acrylonitrile Monomers such as , methacrylic ester, acrylic acid, and methacrylic acid are preferred.

Furthermore, ammonia and primary amines used in the imidization reaction may be in either an anhydrous or water-soluble state, and examples of primary amines include methylamine, ethylamine,
Alkylamines such as butylamine/cyclohexylamine, and aromatic amines such as chloro- or bromo-substituted alkylamines, aniline, tolylamine, naphthylamine, etc., and 7.
Examples include rhodan-substituted aromatic amines.

Furthermore, when the imidization reaction is carried out in a solution or suspension state, it is preferable to use an ordinary reaction vessel such as an autoclave, and when it is carried out in a bulk molten state, it is preferable to use an extruder equipped with a devolatilization device. Good too. Further, a catalyst may be present during imidization, and for example, a tertiary amine or the like is preferably used.

The temperature of the imidization reaction is about 50 to 350°C, preferably 100 to 300°C.

If the temperature is lower than 80°C, the reaction rate is slow and the reaction takes a long time, which is not practical. On the other hand, if the temperature exceeds 350°C, the physical properties will deteriorate due to thermal decomposition of the polymer.

The amount of ammonia and/or primary amine used is preferably 0.8 to 1.05 molar equivalents, particularly 0.9 to 1.0 molar equivalents, relative to the unsaturated dicarboxylic anhydride. If it is less than 0.8 molar equivalent, the imidized copolymer will have a large amount of acid anhydride groups, resulting in poor thermal stability and hot water resistance, which is not preferable.

Furthermore, the rubber-like polymers used in the first and second production methods include butadiene polymers, copolymers of butadiene and vinyl monomers copolymerizable, ethylene-f-propylene co-M
ethylene-propylene-tzene copolymers, block copolymers of butadiene and aromatic vinyl, acrylic ester polymers, and copolymers of acrylic esters and vinyl monomers copolymerizable with them. used.

The component A copolymer contains 0 to 40% by weight of a comb-like polymer, preferably 0 to 30% by weight, and 30 to 30% by weight of aromatic vinyl monomer residues.
90% by weight, preferably 40-70%, unsaturated...zocarganic acid imide derivative residues, 3-70% by weight, preferably 3-60% by weight, and 0-60% by weight of vinyl monomer residues copolymerizable therewith. It is an imidized copolymer consisting of 40% by weight, preferably 0 to 30% by weight, and if the amount of the rubbery polymer exceeds 40% by weight, heat resistance, moldability and dimensional stability will be impaired. If the amount of aromatic vinyl monomer residue is less than 30% by weight, moldability and dimensional stability will be impaired, and if it exceeds 90% by weight, impact strength and heat resistance will be impaired. When the amount of the unsaturated nocarboxylic acid imide derivative residue is less than 3% by weight, when a conductive substance is blended, the impact strength decreases significantly and the effect of improving heat resistance decreases. On the other hand, if the amount of unsaturated dicarboxylic acid imide residue exceeds 70% by weight, the resin composition will become brittle and its moldability will be significantly impaired. If the amount of vinyl monomer residue copolymerizable with these exceeds 40% by weight, dimensional stability and heat resistance will be impaired.

Next, as polycarbonates that can be used as component (B), bisphenol A% (4,4' hydroxynophenyl) ether and U2,2-(4,4'-dihydroxy-3,5,3', 5'- It is a polymer having a carbonate bond synthesized from bisphenols tophosdan or diphenyl carbonate such as (tetrobromodiphenyl)propane, and copolycarbonate (homobond copolymer) made from different bisphenols as raw materials. Modified polycarbonate resins such as heterobond copolymers having cargo bonds and bond bonds, such as ester bonds, urethane bonds, or siloxane bonds in the main chain, can also be used.

Polyesters that can be used as component (B) include dicarboxylic alcohols such as terephthalic acid, adipic acid, sepacic acid, inphthalic acid, naphthalene nocarboxylic acid, and 1,4-cyclohexanedicarboxylic acid, or dimethyl terephthalate, diethyl terephthalate, and Nocarboxylic acid derivatives such as dimethyl 1,4-cyclohexanenocargenate, and sool compounds such as r-f rengelicol, 1.3-7' robinediol, 1.4-f tansool and poly(tetramethylene oxide) glycol. In addition, copolyesters made from different nocarboxylic acids and their derivatives, and different nol compounds can be used as well.

The composition of the present invention contains at least one kind of polymer selected from these polycarbonates and polyesters as an essential component, but may of course contain two or more kinds of polymers.

Furthermore, the thermoplastic resin that can be used as component (C) is (
4) A resin having good compatibility with the imidized copolymer as the component and the polycarbonate and/or polyester as the component (B), such as 30 to 90% by weight of aromatic vinyl monomer and vinyl cyanide monomer. Rubber-like polymer 5, a copolymer obtained by copolymerizing a monomer mixture consisting of 0 to 50% by weight and 0 to 50% by weight of a vinyl monomer copolymerizable with these.
-80% by weight, monomers consisting of 40-80% by weight of aromatic vinyl monomers, 0-40% by weight of vinyl cyanide monomers, and 0-40% by weight of vinyl monomers copolymerizable with these. Graft copolymer copolymerized with 20 to 95% by weight of a mixture of
Examples include -nylon, 6-nylon, 12-nylon, yf liphenylene oxide, styrene graft polymerized polyphenylene oxide, and polyphenylene oxide, and one or more of these resins can be used.

Aromatic vinyl monomers used in component (C) include styrene, α-methylstyrene, vinyltol xy, t-f
+ Styrene monomers such as rustyrene and chlorostyrene, and their substituted monomers; among these, styrene/and α-methylstyrene are particularly preferred.

Examples of vinyl cyanide monomers include acrylonitrile, methacrylonitrile, and α-chloroacrylonitrile, with acrylonitrile being particularly preferred.

Vinyl monomers that can be copolymerized with these include acrylic ester monomers such as methyl acrylate, ethyl acrylate, and butyl acrylate, and methacrylic esters such as methyl methacrylate and ethyl methacrylate. Examples include vinylcarboxylic monomers such as acrylic acid and methacrylic acid, acrylic acid amide, methacrylic acid amide, acenaphthylene, N-vinylcarbazole, N-alkyl substituted maleimide, and N-aromatic substituted maleimide.

Rubbery polymers that can be used as component (C) include buta-tzene polymer, copolymerizable with butadiene 71, copolymer with vinyl monomer, ethylene-propylene copolymer, and ethylene-propylene-tzene copolymer. Polymers, block copolymers of butadiene and aromatic vinyl, acrylic ester polymers, and copolymers of acrylic esters and vinyl monomers copolymerizable therewith are used.

In the present invention, the ratio of blending the components (A), (B), and 9
8 weight percent, preferably 10 to 90 weight %, component (C) is 0
It is in the range of 70 to 70% by weight, preferably 0 to 50% by weight.

(If the proportion of component (B) exceeds 98% by weight, the impact strength will decrease, and if it is less than 2% by weight, the heat resistance will decrease. If the proportion of component (B) exceeds 98% by weight, the hot water resistance will decrease. If the proportion of component (C) is less than 2% by weight, impact strength and fluidity will be impaired.Inclusion of component (C) improves fluidity and impact strength, but the proportion of component (C) exceeds 70% by weight. and lack of heat resistance.

Examples of organic phosphoric acid esters used as stabilizers in the present invention include trimethyl phosphate, triethyl phosphate, tributyl phosphate, trioctyl phosphate, tributoxyethyl phosphate, triphenyl phosphate, triethyl phosphate, triquinrenyl phosphate, trinonylphenyl phosphate, Examples include cresyl diphenyl phosphate, xylenylnophenyl phosphate, octyldiphenyl phosphate, trilauryl phosphate, tricetyl phosphate, tristearyl phosphate, trioleyl phosphate, and halokeone-substituted phosphates thereof.

Organic phosphites include trimethyl phosphite, triethyl phosphite, tributyl phosphite,
Trioctyl phosphite, triphenyl phosphite, trioctyl phosphite, tricylenyl phosphite, trinonylphenyl phosphite, fre-solsophenyl phosphite, trilauryl phosphite, tricetyl phosphite, tristearyl phosphite,
Trioleyl phosphite, triphenyl trithiophosphite, trilauryl trithiophosphite, tristearyl trithiophosphite, and halogenated bosphites thereof.

Acidic phosphoric acid esters include monomethyl anrad phosphate, dimethyl acid bosphate, monoinopropyl anrad phosphate, diisopropyl acid phosphate, monobutyl acid phosphate, butyl acid phosphate, monooctyl acid phosphate, so-octyl acid phos7ate, Monolauryl acid phosphate 1, noburyl annodophosphate, monostearyl acid phosphate, distearyl anrad phosphate, monophenyla/rad phosphate, diphenyl acid phosphate, monobutyl acid phosphate, tsucresol acid phosphate, monononylphenyl acid phosphate,
Examples include nononylphenyl acid phosphate and these halogen-substituted acid bosphates.

Examples of acidic phosphate esters include monomethyl acid phosphite, dimethyl acid phosphite, monoisopropyl acid phosphite, diisozorobyl acid phosphite, monobutyl acid phosphite, butyl acid phosphite, monooctyl acid phosphite, and Butyl acid phosphite, monolauryl acid phosphite, dilauryl acid phosphite, monostearyl 7/tudophosphite, nostearyl acid phosphite, monophenyl acid phosphite, butyl acid phosphite, monophrenol acid phosphite, dimethyl These include acid phosphite, monononylphenyl anthophosphite, dinonylphenyl acid phosphite, and halo-substituted athophosphites thereof.

Examples of the metal salts of acidic phosphoric esters and metal salts of acidic phosphoric esters include 19 salts, Zn salts, and aluminum salts of the above-mentioned acidic phosphoric esters and acidic phosphoric esters.

These additions 1 are the above-mentioned thermoplastic injection resin acid compounds 100
0.01 to 1.0 parts by weight, preferably 0.01 to 1.0 parts by weight.
05 to 0.8 parts by weight. If the amount is less than 0.01 part by weight, the effect of improving retention thermal stability during high-temperature molding is small;
If the amount exceeds 0 parts by weight, there are disadvantages in that heat resistance decreases and retention heat stability is impaired again.

The stabilizer used in the present invention is an organic carboxylic acid and/or its anhydride, and specific examples thereof include terephthalic acid, cyclointanetetracarboxylic acid, trimellitic acid, transanicottic acid, and homophthalic acid. ,
・Diphenic acid, maleic acid, itaconic acid, ββ′β′dithiodipropionfuroic acid, etc., and their anhydrides include maleic anhydride, phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, nophene anhydride #mhydrocyclo intancarzonic acid, benzophenonetetracarboxylic anhydride,
Examples include norbornene 2,3 dicarboxylic anhydride and methylendomethylenetetrahydrophthalic anhydride.

The amount of these additives added is 0 to 5 parts by weight, preferably 0 to 3 parts by weight, per 100 parts by weight of the thermoplastic resin composition. In the second manufacturing method for component (4), the amount of ammonia and/or primary amine used is reduced. In a resin composition containing a suppressed imidized copolymer, the above-mentioned organic carboxylic acid and/or its anhydride does not necessarily have to be contained, but the component (A) contains almost no acid anhydride groups. In the case of an imidized copolymer that does not contain 0.01
part, preferably 0.05 part or more.

The present invention uses as a stabilizer at least one of an organic phosphate ester, a functional phosphate ester, an acid phosphate ester, an acid phosphate ester, and/or a metal salt thereof, and an organic carboxylic acid, an organic carboxylic acid, or an organic carboxylic acid. /acid anhydride and/or at least one type of imidized copolymer containing an acid anhydride group. In order to improve retention heat stability using only a phosphorus compound as a stabilizer, the phosphorus compound must be used in an amount exceeding 1.0 weight, which may result in a decrease in heat resistance or
A disadvantage is that flash and the like are likely to occur during molding retention. Furthermore, the use of only organic carboxylic acid and/or organic carboxylic acid anhydride as a stabilizer is insufficient to maintain impact strength during high-temperature molding retention.

The method of mixing the thermoplastic resin composition of the present invention is not particularly limited, and known means can be used. Examples of the means include a Banbury mixer, a tumbler mixer,
Examples include mixing rolls, single-screw or twin-screw extruders, and the like. Examples of the mixing form include normal melt mixing, multi-stage melt mixing using a master pellet, etc., and solution blending.

Furthermore, antioxidants, flame retardants, ultraviolet absorbers, plasticizers, lubricants, fillers such as glass fibers, carbon fibers, calcium carbonate, colorants, metal powders, etc. may be added to the composition of the present invention. It is possible.

The present invention will be further explained below with reference to Examples.

Incidentally, all parts and parts in the examples are expressed on a weight basis.

(Example of the invention) 100 parts of styrene in an autoclave equipped with a co-produced stirrer in which ludic acid anhydride was polymerized;
After adding 50 parts of methyl ethyl ketone and 24 parts of polybutadiene rubber (NF35AS, manufactured by Asahi Kasei Corporation) cut into small pieces and purging the system with nitrogen gas, the mixture was stirred at room temperature all day and night to dissolve the rubber. After bringing the temperature to 80°C, 67 parts of maleic anhydride and benzoyl/? A solution of 0.3 parts of -oxide dissolved in 400 parts of methyl ethyl ketone was added continuously over 8 hours. After addition, the mixture was kept at 80°C for an additional 3.5 hours.

A part of the viscous reaction solution was sampled and the unreacted monomer was quantified by gas chromatography, and the polymerization rate and maleic anhydride content in the polymer were calculated, and it was found that styrene was polymerized. Polymerization rate of maleic anhydride: 98%
9%, content of maleic anhydride in copolymer 35.2%
Met. Next, 63 parts of anion (100% molar equivalent of added maleic anhydride) and 2 parts of triethylamine were added to the polymerization solution.
1 part of an antioxidant and 1 part of Irganox 1076 (Chipaga Iggy Co., Ltd.) were added, and after raising the temperature to 140 DEG C., the mixture was reacted for 7 hours to perform an imidization reaction. 100% reaction solution
Cool to ℃ and pour the reaction solution into a stainless steel vat.
I did it. Further, vacuum drying was performed at 180° C. for 3 hours, and after solvent removal, pulverization treatment was performed to obtain a copolymer as a yellowish white powder.

C--C-13 part analysis showed that the conversion rate of sialic acid anhydride groups to imide groups was 95%. This copolymer was designated as Polymer A-1.

Actually, the experimental example except that 100 parts of styrene and 17 parts of acrylonitrile were used instead of 100 parts of styrene in Test-(1), 50 parts of maleic anhydride was used instead of 67 parts of maleic anhydride, and 35 parts of aniline was used instead of 63 parts. - An imidized polymer was obtained by carrying out exactly the same operation as in (1). This will be referred to as Polymer A-2.

The average polymerization rate at this time was 95%, and the conversion rate to imide groups was 74%.

An imidized polymer was obtained by carrying out exactly the same operation as in Experimental Example-(1) except that the polybutadiene in Experimental Example-(1) was not used. This will be referred to as Polymer A-3. The average polymerization rate at this time was 99%, and the conversion rate to imide groups was 98%.

Polyptazoene rubber (Asahi Kasei Tsuen NF: 35AS)
An autoclave containing 2.4 parts dissolved in 100 parts of styrene and 50 parts of methyl ethyl ketone was kept at 80°C and N-
A solution prepared by dissolving 100 parts of 7-functional nil maleimide and 0.3 part of benzoyl monooxide in 400 parts of butyl ethyl keto was continuously added over 8 hours. Further, the mixture was kept at 80° C. for 3.5 hours to carry out polymerization. The polymerization solution was vacuum dried and pulverized to obtain a powdery copolymer. This will be referred to as Polymer A-4. The average polymerization rate at this time was 95%.

Experimental example - (5) Production of component (C) niger raft copolymer 80 parts of polybutadiene latex (solid content 50%, average vertical diameter 0.35μ, cal content 90%), 1 part of sodium stearate, Um formaldehyde sulfoxylate 01 part, tetrasonorum ethylenediamine tetraacetic acid 0.03 part, ferrous sulfate 0.003 part
and 200 parts of water were charged into an autoclave purged with nitrogen gas. After heating the temperature to 65°C, 60 parts of a monomer mixture consisting of 30% acrylonitrile and 70% styrene, 0.3 part of t-dodecylmercaptaf, 0.2 part of cumene hydro/('-oxide) were added. After the addition was completed, the polymerization was continued at 65°C for 2 hours.The polymerization rate was 96%.After adding the antioxidant to the obtained latex, it was salted out with lucium chloride, washed with water, and dried. After that, a white powdery polymer C-1 was obtained.

Experimental Example-(6) Component (C): Production of copolymer with α-methylstyrene and acrylonitrile (α-methylstyrene and acrylonitrile) 70 parts, acrylonitrile 30 parts,
2.5 parts of sodium stearate, 0.6 parts of t-dodecylmercaptan, and 250 parts of water were heated to 70°C, and 0.05 parts of potassium persulfate was added to initiate polymerization.

5 hours after the start of polymerization, add 0.03 ml of potassium persulfate.
The temperature was raised to 75°C and maintained for 3 hours to complete the polymerization. The polymerization rate reached 97%. The obtained latex is coagulated with chloride, washed with water, and dried to obtain a white powder copolymer, which is referred to as copolymer C-2.

Experimental example - (7) Evaluation of physical properties of thermoplastic resin composition (4) Imidized copolymers of A-1 to A-4 as components, precursor d? as component (B) Nate (Nonn Light K manufactured by Yojin Kasei Co., Ltd.)
1300W or less (displayed as PC), Polyethylene Telewotalate (Polyplastic Co., Ltd. Noyuranex 20)
02 (hereinafter referred to as PBT), and polyester elastomer (hereinafter referred to as TPE, Belprene P70B manufactured by Toyobo Co., Ltd.), and a copolymer of C-1 to 2 as the component (C) are blended into the thermoplastic resin as a stabilizer. A composition was prepared by mixing the following, and the physical properties of each were measured and shown in Table 1.

The physical properties were measured by the following method.

(1) Vicat softening point...load 5 stain, ASTM-D-
(2) Impact 1 strength according to 1525: Notched Izot impact strength AS
According to TM D-256 (3) Retention stability: Visually evaluated molded products in high-temperature single retention molding and molded products in normal molding (4) Molding conditions Normal molding: Cylinder temperature 270°C, Retention molding with a mold clamping time of 45 seconds...High temperature residence molding with a cylinder temperature of 270°C and a mold clamping time of 180 seconds...Cylinder temperature of 300°C and mold clamping time It was molded in 180 seconds.

(Effect of the invention) An organic phosphate ester,
By using an organic phosphite, an acidic phosphate, an acidic phosphoric ester, and/or a metal salt thereof with an organic carboxylic acid and/or an organic carboxylic acid anhydride, the impact strength during high-temperature retention molding can be improved. In addition, it was possible to suppress the coloring of the molded product and the occurrence of flashing.

Patent applicant: Denki Kagaku Kogyo Co., Ltd. Handbook continuation supplementary book August 13, 1985

Claims (1)

[Claims] (1) Component (A): 0 to 40% by weight of rubbery polymer, 30 to 90% by weight of aromatic vinyl monomer residue, 3 to 70% by weight of unsaturated dicarboxylic acid imide derivative residue, and these residues. 2-98% by weight of an imidized copolymer consisting of 0-40% by weight of vinyl monomer residues other than Component (B): 2-98% of one or more polymers selected from polycarbonate and/or polyester. and (C) component: 0 to 70% by weight of a thermoplastic polymer, an organic phosphoric acid ester, an organic phosphorous ester, an acidic phosphoric ester,
Acidic phosphite ester and/or metal salt thereof 0.0
1. A thermoplastic resin composition comprising 1 to 1.0 parts by weight, and further 0 to 5 parts by weight of an organic carboxylic acid and/or an organic carboxylic acid anhydride.