JPS63156850A - Thermoplastic resin composition - Google Patents

Abstract

PURPOSE:To obtain a thermoplastic resin composition, containing an aromatic polycarbonate, ABS resin and unsaturated carboxylic acid (derivative) and having excellent chemical as well as impact resistance, molding processability, etc. CONSTITUTION:A composition consisting of (A) 40-80pts.wt. aromatic polycar bonate and (B) 20-60pts.wt. blend of (i) 100-10wt.% conjugated diene based rubber-aromatic vinyl-vinyl cyanide graft copolymer with (ii) 0-90wt.% aromatic vinyl-vinyl cyanide graft copolymer and (C) 1-15pts.wt. olefinic polymer, prefer ably obtained by modifying a copolymer, prepared by copolymerizing ethylene with a 3-12C alpha-olefin in the presence of a catalyst containing Mg, Ti and an organoaluminum compound and having specific properties with 0.05-10wt.% unsaturated carboxylic acid or a derivative thereof, preferably maleic anhydride.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a thermoplastic resin containing an aromatic polycarbonate resin, an A, BS resin, and a modified olefin copolymer modified with an unsaturated carboxylic acid or a derivative thereof. It is a plastic resin composition that exhibits various mechanical properties, particularly excellent impact resistance at low temperatures, and good appearance and moldability.

[Conventional technology and its problems]

As is well known, aromatic polycarbonate resins are used as useful engineering plastics because they are tough, have excellent impact resistance, electrical properties, and good dimensional stability. However, the melt viscosity is high and the moldability is poor.
Its range of applications is limited because of its drawbacks, such as its impact resistance being thickness-dependent and its chemical resistance being susceptible to cracking when it comes into contact with aromatic solvents or gasoline. is the actual situation.

In order to improve these drawbacks, proposals have been made to blend various resins into aromatic polycarbonate resins. For example, ABS resin is used in Japanese Patent Publication No. 38 (Sho 38) (5225), MBS resin is used in Japanese Patent Publication No. 39-71 (Japanese Patent Publication No. 42-11),
No. 496 teaches incorporating MABS resin. However, AB in polycarbonate resin
Although the thickness dependence of impact resistance and moldability are somewhat improved when S resin or MABS resin is blended, the impact resistance at low temperatures is low, and the improvement is not necessarily sufficient to meet recent market demands. I can't say that. Furthermore, when MBS resin is blended with polycarbonate resin, the improvement in moldability is insufficient and it is difficult to mold large-sized molded products.

[Means for solving problems]

The present invention enables molding of an aromatic polycarbonate resin-ABS resin composition by further blending a modified olefin copolymer obtained by modifying a composition of a polycarbonate resin and an ABS resin with a novel unsaturated carboxylic acid or a derivative thereof. We have found and completed a thermoplastic resin composition that has improved processability, impact resistance at low temperatures, and the thickness dependence of impact strength, as well as a well-balanced variety of properties such as mechanical strength, heat resistance, and appearance. It is.

That is, the present invention comprises (a) 40 to 80 parts by weight of aromatic polycarbonate resin, (b) 100 to 1 part by weight of conjugated diene rubber-aromatic vinyl-vinyl cyanide graft copolymer.
and (c) a modified olefin copolymer obtained by modifying an olefin polymer with an unsaturated carboxylic acid or a derivative thereof. Combine 1-15
It is a thermoplastic resin composition with excellent chemical resistance and impact resistance.

The present invention will be explained in detail below.

The aromatic polycarbonate resin (a) of the present invention is an optionally branched thermoplastic aromatic polycarbonate resin produced by reacting an aromatic dihydroxy compound or a small amount of a polyhydroxy compound with a diester of phosgene or carbonic acid. It is a combination. Examples of aromatic dihydroxy compounds include 2゜2-bis(4-hydroxyphenyl)propane (=bisphenol A), tetramethylbisphenol A1 tetrabromobisphenol A1 bis(
Examples include 4-hydroxyphenyl)-P-diisopropylbenzene, hydroquinone, resorcinol, and 4,4'-dihydroxydiphenyl, with bisphenol A being particularly preferred. In addition, to obtain a branched aromatic polycarbonate resin, phloroglucin, 4,6-dimethyl-2.4.6-)li(4-hydroxyphenyl)hebutene-2,4,6-dimethyl-2.4.6- ) ri (4-
hydroxyphenyl)hebutane, 2,6-cymethyl-2
．． 4.6-)li(4-hydroxyphenyl)hebutene-3,4,6-dimethyl-2.4.6-)li(4-hydroxyphenyl)hebutane, 1.3.5-)li(4
-hydroxyphenyl)benzene, 1.1.1-)ri
Poly, hydroxy compounds exemplified by (4-hydroxyphenyl)ethane, 3,3-bis(4-hydroxyaryl)oxindole (= isatin (bisphenol)), 5-chloroisatin, 5,7-dichloroisatin, 5 - Substituting a part of the dihydroxy compound, such as bromoisatin, for example 0.1 to 2 mol%, with a polyhydroxy compound. Furthermore, aromatic monohydroxy compounds suitable for adjusting the molecular weight include m- and p-methylphenol, m- and p-propylphenol, p-
-bromophenol, p-tert-butylphenol, p-long chain alkyl substituted phenol, and the like are preferred. Typical aromatic polycarbonate resins include bis(4-hydroxyphenyl)alkane-based dihydroxy compounds, particularly polycarbonates whose main raw material is bisphenol A. polycarbonate copolymer,
Branched polycarbonate obtained by using a small amount of a trivalent phenol compound can also be mentioned. Aromatic polycarbonate resins may be used as a mixture of two or more types.

Conjugated diene rubber-aromatic vinyl-vinyl cyanide graft copolymer as component (b) of the present invention 100 to 10w
t% and aromatic vinyl-vinyl cyanide copolymer 0-90
The mixture with wt% is usually called ABS resin.

The conjugated diene rubber-aromatic vinyl-vinyl cyanide graft copolymer is a graft polymer obtained by graft polymerizing an aromatic vinyl compound and vinyl cyanide as essential components to a rubbery polymer containing a conjugated diene as an essential component. It is a polymer. The composition ratio of the conjugated diene rubber and the graft polymerization compound in the graft polymer is not particularly limited, but it is preferably 5 to 70 wt% of the conjugated diene rubber and 95 to 30 wt% of the graft polymerization compound. Furthermore, the composition ratio of aromatic vinyl and vinyl cyanide in the graft polymerization compound is not particularly limited, but aromatic vinyl 50~
80 wt% and vinyl cyanide 50 to 20 wt%.

Further, there is no particular restriction on the composition ratio of aromatic vinyl and vinyl cyanide in the aromatic vinyl-vinyl cyanide copolymer, but it should be 55 to 85 wt% of aromatic vinyl and 45 to 15 wt% of vinyl cyanide. is preferable, and the viscosity is also 0.60 to 0.60 at 30°C in dimethylformamide.
A range of 1.50 is preferred.

The conjugated diene rubber in the above graft copolymer or copolymer includes polybutadiene, butadiene-styrene copolymer, butadiene-acrylonitrile copolymer,
Examples include butadiene-based rubbery polymers such as butadiene-acrylic acid ester copolymers. Examples of aromatic vinyl include styrene, halogenated styrene, vinyltoluene, α-methylstyrene, vinylnaphthalene, etc., with styrene being particularly good; examples of vinyl cyanide include acrylonitrile, methacrylonitrile, α-methylstyrene, and α-methylstyrene.
- Examples include halogenated acrylonitrile, and acrylonitrile is particularly good. It is also preferable to substitute a part of the aromatic vinyl or vinyl cyanide with another vinyl compound, such as (meth)acrylic esters, vinyl acetate, vinyl chloride, and especially (meth)acrylic esters.

The modified olefin polymer which is component (c) of the present invention is:
It is obtained by heating and adding 0.05 to 10% by weight of an unsaturated carboxylic acid or a derivative thereof to an olefin polymer in the presence of an organic peroxide.

Examples of olefin polymers include homopolymers such as low, medium, and high density polyethylene, polypropylene, polybutene-1, poly-4-methylpentene-1, ethylene, other α-olefins containing propylene as a main component, or polar monomers. copolymers with, for example, ethylene-butene-1 copolymers,
Ethylene-4-methylpentene-1 copolymer, ethylene-octene-1 copolymer, propylene-ethylene copolymer, propylene-butene-1 copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer Examples include polymers such as chlorinated polyethylene and sulfonated polyethylene, and/or mixtures thereof.

Among these olefin polymers, preferably a copolymer of ethylene and an α-olefin having 3 to 12 carbon atoms, more preferably a catalyst consisting of a solid catalyst component containing at least magnesium and titanium and an organoaluminum compound. Preferably, those obtained by copolymerizing ethylene and α-olefin and having the following properties (1) to (2) are suitable.

■Ml: 20g/10min or less, preferably 0.
05~5g/10min, especially 0.2~4g/10m
in.

■Density: 0.86 (1-0,9108/cm
'.

(2) Temperature at its maximum peak measured by differential scanning calorimetry (DSC): 100°C or higher, preferably 110 to 124°C.

■ Boiling n-hexane insoluble matter: 10 wt% or more, preferably 20 to 94 wt%.

The conditions for these ■ to ■ are as follows: ■, MI (JIS K 6760) is 20g/1
If it exceeds 0 min, the appearance of the molded product will deteriorate, which is not preferable.

■Density (JIS K 6760) is 0.860 g
If it is less than /cm', the melting point will be lowered, so it cannot be used at high temperatures, and the mechanical strength will also be poor, which is not preferable.

(2) The maximum peak temperature (Tm) of DSC is a value that correlates with the crystal form, and if Tm is less than 100°C, the heat resistance and surface strength of the composition will be insufficient, and when the molded product is used at high temperatures, This is not preferable as it tends to cause plastic deformation.

■The boiling n-hexane insoluble content is a guideline for the proportion of amorphous parts and the content of low molecular weight components.When the insoluble content is less than 10 wt%, the amorphous parts and low molecular weight components are This results in problems such as poor performance due to reduced strength, a sticky surface, and a tendency for dust to adhere.

It is necessary to satisfy the following characteristics.

In addition, boiling n-hexane insoluble matter and DS in the present invention
The method for measuring C is as follows.

[Boiling n-hexane insoluble matter]

20mmX from a heat press molded sheet with a thickness of 200ρ
Three 30 mm sheets are cut and each is extracted with boiling n-hexane for 5 hours using a Soxhlet extractor. n
- Remove hexane-insoluble matter and vacuum dry (7 hours, 50
°C), then calculate using the following formula.

[Measurement by DSC] Approximately 5 mg from a 100p thick heat press molded film
Precisely weigh the sample, set it in the DSC device, and
℃ and held at that temperature for 15 minutes, cooled to 0℃ at a cooling rate of 2.5℃/min, and then raised from this state to 170℃ at a heating rate of 10℃/min. Take measurements. The temperature at the apex position of the maximum peak that appears during the temperature increase from 0°C to 170°C is defined as Tm.

The α-olefins having 3 to 12 carbon atoms used in the production of the above ethylene-α-olefin copolymer include propylene, butene-1,4-methylpentene-1, hexene-1, octene-1, decene-1, 1, dodecene-1, etc.

The solid catalyst component is made by supporting a titanium compound on an inorganic solid compound containing magnesium by a known method.

Inorganic solid compounds containing magnesium include metal magnesium, magnesium hydroxide, magnesium carbonate, magnesium oxide, magnesium chloride, etc., and double salts and complex oxides containing magnesium atoms and metals selected from silicon, aluminum, and calcium. Carbonates, chlorides or hydroxides, as well as these inorganic solid compounds, can be combined with organic oxygen-containing compounds such as water, alcohols, phenols, ketones, aldehydes, carboxylic acids, esters, polysiloxanes, acid amides, and metal alkoxides. , inorganic oxygen-containing compounds such as metal oxy-acid salts; organic sulfur-containing compounds such as thiols and thioethers; inorganic sulfur-containing compounds such as sulfur dioxide, sulfur trioxide, and sulfur; benzene, toluene, xylene, anthracene, phenanthrene, etc. monocyclic and polycyclic aromatic hydrocarbon compounds; treated or reacted with halogen-containing compounds such as chlorine, hydrogen chloride, metal chlorides, and organic halides.

The titanium compounds supported on this inorganic solid compound include titanium halides, alkoxy halides,
These include alkoxides, halogenated oxides, etc., and tetravalent or trivalent titanium compounds are preferred. Specifically, the tetravalent titanium compound has the general formula Ti(OR), X4
-r, (wherein R represents an alkyl group, aryl group, or aralkyl group having 1 to 20 carbon atoms, X represents a halogen atom, and n represents O≦n≦4) is preferable. , titanium tetrachloride, titanium tetrabromide, titanium tetrachloride, monomethoxytrichlorotitanium, dimethoxychlorotitanium, trimethoxymonochlorotitanium, tetramethoxytitanium, monoethoxytrichlorotitanium, diethoxydichlorotitanium, triethoxymonochlorotitanium, tetraethoxy Titanium, monoisopropoxytrichlorotitanium, diisopropoxydichlorotitanium, triisopropoxymonochlorotitanium, tetraisopropoxytitanium, monobutoxytrichlorotitanium, dibutoxydichlorotitanium,
Examples include tetravalent titanium compounds such as monopentoxytrichlorotitanium, monophenokiditrichlorotitanium, diphenoxydichlorotitanium, triphenoxymonochlorotitanium, and tetraphenoxytitanium. In addition, trivalent titanium compounds include trivalent titanium compounds obtained by reducing titanium tetrahalides such as titanium tetrachloride and titanium tetrabromide with hydrogen, aluminum, titanium, or organometallic compounds of metals from groups I to II of the periodic table. titanium compound; general formula Ti(OR),
X...

(Here, R represents an alkyl group, an aralkyl group, or an aralkyl group having 1 to 20 carbon atoms, and X represents a halogen atom,
m is Q<m<4. Examples include trivalent titanium compounds obtained by reducing tetravalent alkoxy titanium halide, which is ), with an organometallic compound of a metal of Groups 1 to 2 of the Periodic Table. Among these titanium compounds, tetravalent titanium compounds are particularly preferred. Specifically, the components constituting the solid catalyst system of the present invention include those disclosed in Japanese Patent Publications No. 51-3514, Japanese Patent Publications No. 23864-1982, Japanese Patent Publications No. 152-1982, Japanese Patent Publications No. 15111-1980, Kaisho 49-10
Examples thereof include those specifically exemplified in Japanese Patent Publication No. 6581, Japanese Patent Publication No. 52-11710, Japanese Patent Publication No. 51-153, and Japanese Patent Application Laid-Open No. 56-95909.

In addition, as other solid catalyst components, for example, reaction products of Grignard compounds and titanium compounds can also be used; Showa 57-7
Examples include those specifically described in Publication No. 9009, etc.
In addition, JP-A-56-47407, JP-A-57
A solid catalyst component in which an inorganic oxide is used together with an optionally used organic carboxylic acid ester as described in Japanese Patent Laid-open No. 187305 and Japanese Patent Application Laid-Open No. 58-21405 can also be used.

The organoaluminum compound of the present invention has the general formula R
3AL, R2AIX, RAIX2. R2AlOR
, RAI(OR)X and R3AL2X3 (where R
is an alkyl group, aryl group, or aralkyl group having 1 to 20 carbon atoms, X is a halogen atom, and R may be the same or be a stationery). Examples include isobutylaluminum, trihexylaluminum, trioctylaluminum, diethylaluminium chloride, diethylaluminum ethoxide, ethylaluminum sesquichloride, and mixtures thereof. The amount of the organoaluminum compound to be used is not particularly limited, but it can usually be used in an amount of 0.1 to 1000 times the mole of the titanium compound.

An ethylene-α-olefin copolymer is synthesized using the above catalyst system.

Prior to the polymerization reaction of the present invention, carrying out the polymerization reaction after contacting the α-olefin with the catalyst system of the present invention greatly improves the polymerization activity and allows the polymerization reaction to be performed more stably than in the case of no treatment. It is something that can be done. As for the pretreatment conditions, the contact time and temperature between the catalyst system and the α-olefin are not particularly limited.
The amount of α-olefin is 1 to 50,000 g, preferably about 5 to 30,000 g.

The polymerization reaction may be similar to the polymerization reaction of olefins using ordinary Ziegler type catalysts, and may be carried out in a gas phase, in the presence of an inert solvent, or using the monomer itself as a solvent in a state substantially free of oxygen, water, etc. , temperature 20-300°C, preferably 40-200°C, pressure normal pressure - 70kg/cI+1
-01 Preferably 2 to 60 kg/cn! - Do this with G.

Molecular weight can be adjusted to some extent by changing polymerization conditions such as polymerization temperature and catalyst molar ratio, but usually
This is effectively carried out by adding hydrogen to the polymerization system.

Of course, a two-step or more multi-step polymerization reaction with different polymerization conditions such as hydrogen concentration and polymerization temperature can also be carried out without any problem.

The ethylene-α-olefin copolymer preferably used in the present invention as described above is clearly distinguishable from conventional ethylene-α-olefin copolymers obtained using vanadium or vanadium as a main component as a solid catalyst component. It is also distinguished from LLDPB (linear density polyethylene). That is, even if the monomer components constituting the copolymer of the present invention and the conventional copolymer are the same and the density is the same, the copolymer of the present invention has a higher Tm by DSC, In addition, the copolymer of the present invention has an n-hexane insoluble content of 10 wt % or more, whereas the conventional copolymer has no insoluble content, or even if it exists, it is only in a very small amount. Also, LLDPH
Commercially available products usually have a density of 0.920 g/cm' or more, and furthermore, the dynamic viscoelastic temperature dispersion behavior of LLDPH is different from the dynamic viscoelastic temperature dispersion behavior of the one of the present invention. They are also distinguished in this respect.

Unsaturated carboxylic acids used in the present invention include monobasic acids and dibasic acids such as acrylic acid, methacrylic acid, maleic acid, fumaric acid, crotonic acid, itaconic acid, and citraconic acid. Further, as derivatives of unsaturated carboxylic acids, there may be mentioned metal salts, amides, imides, esters, anhydrides, etc. of the above-mentioned unsaturated carboxylic acids, and among these, maleic anhydride is most preferred.

The amount of the unsaturated carboxyl structure or its derivative added is 0.05 to 10 wt%, preferably 0.1 to 3 wt%, based on the olefin polymer. When the amount added exceeds lht%, there is a risk that decomposition and crosslinking reactions will occur in addition to the addition reaction, and if the amount is not vortexed at 0.05wt%, the purpose of improving the compatibility of the present invention cannot be achieved. .

The modification reaction is carried out by heating in the presence of an organic peroxide.

The reaction is carried out by melt-kneading in an extruder or a kneader such as a Banbury mixer without a solvent, or in a solvent such as an aromatic hydrocarbon such as benzene, xylene, or toluene, or an aliphatic hydrocarbon such as hexane, heptane, or octane. Although there are no particular limitations, it is preferable to carry out the reaction in an extruder for reasons such as simple operation, excellent economic efficiency, and continuity with subsequent steps.

Examples of organic peroxides include benzoyl peroxide, lauryl peroxide, azobisisobutyronitrile, dicumyl peroxide, t-butyl hydroperoxide, α, d-bis(t-butylperoxydiisopropyl) Benzene, di-t-butyl peroxide, 2,5-di(t-butylperoxy)hexyne, etc. are preferably used, and the copolymer (c)° or the copolymer (c)'' is the main component. 0.00% per 100 parts by weight of composition (c) with other olefinic polymer resins
It is used in an amount of 5 to 2.0 parts by weight, preferably 0.01 to 1.0 parts by weight. The amount of organic peroxide used is 0.005
If it is less than 1 part by weight, the modification effect will not be substantially exhibited;
Even if more than 2.0 parts by weight is added, it is difficult to obtain further effects and there is a risk of excessive decomposition or crosslinking reaction.

(a) aromatic polycarbonate resin 40 to 80 parts by weight of the present invention explained in detail above, and (ra) conjugated diene rubber-aromatic vinyl-vinyl cyanide graft copolymer 10
Mixture of 0 to 10 wt% and aromatic vinyl-vinyl cyanide graft copolymer θ to 90 wt% (ABS resin) 2
0 to 60 parts by weight and (c) 1 to 15 parts by weight of a modified olefin copolymer obtained by modifying an olefin polymer with an unsaturated carboxylic acid or its derivative, and are usually mixed in an extruder or a Banbury mixer. The thermoplastic resin composition of the present invention is prepared by melt-mixing using a roll or the like.

If the aromatic polycarbonate resin (a) is less than 40 parts by weight, the heat resistance will not reach the level required for engineering plastics, and the dimensional stability will also be poor. If the ABS resin (b) is less than 20 parts by weight, improvements in moldability, impact resistance, etc. will be insufficient, and if it exceeds 60 parts by weight, heat resistance will be insufficient. Furthermore, if the modified olefin polymer (c) is less than 1 part by weight, no improvement in impact resistance will be achieved, and if it exceeds 15 parts by weight, it will cause poor heat resistance, which is not preferred.

The thermoplastic resin composition of the present invention as described above may contain various additives such as stabilizers, pigments, dyes, flame retardants, and lubricants, reinforcing materials such as inorganic or organic fiber substances, glass beads, etc., as desired. Various fillers may be blended, and other resin components may also be blended within a range that does not impair the characteristics of the present invention. For example, polycarbonate oligomers from bisphenol A or tetrabromobisphenol A can be used to improve moldability, flame retardancy, and surface properties, and heat-resistant polyesters such as polyester carbonates and polyarylates (e.g., trade names: U Polymer, Unitika@) For improving heat resistance, it is possible to incorporate

〔Example〕

The following will be explained using reference examples, working examples, comparative examples, etc.
"%", "part" and "molecular weight" are based on weight unless otherwise specified.

[Resin used]

(a) Fli, min: aromatic polycarbonate resin.

A-1 = Aromatic polycarbonate made from bisphenol A (manufactured by Mitsubishi Gas Chemical, trade name Newpiron S-)
2000, molecular weight 25.000) Component (b): ABS resin.

B-1=Product name: JSRABS 35, manufactured by Japan Synthetic Rubber.

B-2 Part name: JSRABS 42, made by Japan Synthetic Rubber ■.

Component (e): modified olefin resin.

C-LM: substantially anhydrous magnesium chloride, 1,2-
Ethylene-butene-1 is produced by copolymerizing ethylene and butene-1 using a solid catalyst component obtained from dichloroethane and titanium tetrachloride and a catalyst consisting of triethylaluminum.
A copolymer (c-1) was obtained.

The ethylene content of C-1 is 91.5 mol%, M I
1. Og/10min, density 0.905 g/cm'
, DSC maximum peak temperature is 121°C, boiling) I! ten
-Hexane insoluble content was 90 wt%.

0.25 parts of maleic anhydride and 30.02 parts of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexyne were added to 1100 parts of Kono C-1, and the mixture was heated to 200 t' in a Banbury mixer for 15 minutes. The mixture was kneaded for a minute to obtain a modified ethylene-butene-1 copolymer.

C-2M: An ethylene-propylene copolymer (c- 2) was obtained.

C-2(7) Ethylene content is 81.5 mol%, M
IO, 5g/10min, density 0.890g/c
m3, DSC maximum peak temperature is 121.6℃, boiling n
-Hexane insoluble content was 60 wt%.

A modified ethylene-propylene copolymer was obtained in the same manner as C-LM except that this copolymer was used.

Examples 1 to 3 and Comparative Examples 1 to 7 Using the components (a), (b), and (c) described above, they were mixed in a blender for 30 minutes at the ratios shown in Table 1, and the mixture was transferred to an extruder with a vent. (40mmφ, L/D=25, melt extruded pellets at a cylinder temperature of 250°C, dry the pellets in a hot air dryer at 120°C for 5 hours or more, and mold test pieces for physical property measurement using an injection molding machine, Physical properties were tested and the results are shown in Table 1.

For comparison, aromatic polycarbonate resin alone (Comparative Example 1
), Composition of aromatic polycarbonate resin and ABS resin (Comparative example 2), Composition of aromatic polycarbonate resin and unmodified olefin polymer (c-1, -2) (Comparative example 3.4), Aromatic Group polycarbonate resin and MBS resin (
Composition (comparative example 5) with aromatic polycarbonate resin and M
AS resin (manufactured by Mitsubishi Rayon ■, product name: Metablane Il
Table 1 also shows the results of the same procedure as above for a composition with 1529) (Comparative Example 6) and a composition in which ABS resin was added to the composition components of Comparative Example 6 (Comparative Example 7).

Note that the descriptions in the table are as follows.

*4 σT (= tensile strength): Unit, Kg/c *6
C1σp (=CC14 medium bending strength) 2 units, Kg
/cnJ [Operations and Effects of the Invention] As explained above in the detailed explanation, the modified ethylene/α-olefin copolymer used in the present invention is clearly different from that produced by conventional methods, and therefore, the copolymer It is clear that the composition of the present invention using the above compound also exhibits excellent properties in terms of fluidity, chemical resistance, heat resistance, and impact resistance.

Claims (1)

[Scope of Claims] 1 (a) 40 to 80 parts by weight of aromatic polycarbonate resin, (b) 100 to 10 wt% of conjugated diene rubber-aromatic vinyl-vinyl cyanide graft copolymer and aromatic vinyl-cyanide Contains 20 to 60 parts by weight of a mixture with 0 to 90 wt% of a vinyl graft copolymer and (c) 1 to 15 parts by weight of a modified olefin copolymer obtained by modifying an olefin polymer with an unsaturated carboxylic acid or a derivative thereof. A thermoplastic resin composition with excellent chemical resistance and impact resistance. 2. The thermoplastic resin composition according to claim 1, wherein the olefin polymer is an ethylene-α-olefin copolymer. 3. The ethylene-α-olefin copolymer is obtained by copolymerizing ethylene and α-olefin in the presence of a catalyst consisting of a solid catalyst component containing at least magnesium and titanium and an organoaluminum compound (1) Melt Index 20g/10min or less (2
) Density: 0.860 to 0.910 g/cm^3 (3) The maximum peak temperature measured by differential scanning calorimetry (DSC) is 100°C or higher (4) Boiling n-hexane insoluble content must be 10 wt% or higher The thermoplastic resin composition according to claim 1 or 2, characterized in that: 4. The thermoplastic resin composition according to claim 2 or 3, wherein the α-olefin has 3 to 12 carbon atoms. 5 The amount of the unsaturated carboxylic acid or its derivative used is 0.05 to 10 wt relative to the olefin copolymer (c).
%, the thermoplastic resin composition according to claim 1, 2, 3 or 4. 6. The thermoplastic resin composition according to claim 1, 2, 3, 4 or 5, wherein the unsaturated carboxylic acid or its derivative is maleic anhydride.