JPS63113067A - Thermoplastic resin composition - Google Patents

Abstract

PURPOSE:To obtain the titled composition outstanding, in particular, in low- temperature impact resistance, with chemical resistance and good molding processability, by blending an aromatic polycarbonate resin, aromatic saturated polyester resin and specific modified ethylene-alpha-olefin copolymer. CONSTITUTION:The objective composition can be obtained by blending (A) 60-90pts.wt. of an aromatic polycarbonate resin, (B) 8-39pts.wt. of an aromatic saturated polyester resin and (C) 1-15pts.wt. of a modified ethylene-alpha-olefin copolymer made by modification, with an unsaturated carboxylic acid (derivative), of either (i) a copolymer prepared by copolymerization, in the presence of a catalyst consisting of solid catalytic component containing Mg and Ti and organoaluminum compound, between ethylene and alpha-olefin, with a melt index <=20g/10min, density 0.860-0.910g/cm<3>, Differential Scanning Calorimetry (DSC) max. peak temperature >=100 deg.C and boiling n-hexane insolubles >=10wt% or (ii) its blend with another olefin polymer, consisting mainly (>=70wt%) of the copolymer (i).

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a modified ethylene-α-olefin copolymer obtained by modifying an aromatic polycarbonate resin, an aromatic polyester resin, and a novel unsaturated carboxylic acid or a derivative thereof. It is a thermoplastic resin composition containing various mechanical properties, especially impact resistance at low temperatures, chemical resistance,
It shows good 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, Japanese Patent Publication No. 40-17663 teaches blending a polyolefin, and Japanese Patent Publication No. 40-24191 teaches blending an ethylene-propylene copolymer. Although improvements in chemical properties are recognized, the effect of improving impact resistance at low temperatures is small, and there are various defects such as surface peeling caused by poor compatibility and weakness of weld parts, so improvements are not always practical. cannot be said to be sufficient. In addition, special public service
Publication No. 5 proposes improving chemical resistance by blending aromatic saturated polyester resin with aromatic polycarbonate resin, but these resins have low impact resistance, and it is difficult to improve the thickness dependence of impact resistance. Not done.

Furthermore, Japanese Patent Publication No. 39-20434 proposes a ternary composition in which an aromatic polycarbonate resin is blended with an aromatic saturated polyester resin and a polyolefin, which improves moldability, impact resistance, and chemical resistance. However, the effect of improving impact resistance at low temperatures is small, and there are various defects such as surface peeling phenomenon due to poor compatibility and weakness of weld parts, and it is not always possible to meet recent market demands. It cannot be said that the improvements are sufficient.

[Means for solving problems]

The present invention involves modifying an ethylene-α-olefin copolymer having specific properties or a composition containing this copolymer as a main component with another olefin polymer resin with an unsaturated carboxylic acid or a derivative thereof. A new modified ethylene-α-
By blending the olefin copolymer, the moldability of the aromatic polycarbonate resin-aromatic saturated polyester resin composition, impact resistance at low temperatures, and thickness dependence of impact strength are improved, as well as mechanical strength and heat resistance. He discovered and completed a thermoplastic resin composition that has a well-balanced variety of properties such as properties.

That is, the present invention has (a) 60 to 90 parts by weight of an aromatic polycarbonate resin, (b) 8 to 39 parts by weight of an aromatic saturated polyester resin, and (c) the following properties (1) to (4). An ethylene-α-olefin copolymer (c) 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.
or a modified ethylene-α obtained by modifying a composition (c)°” containing the copolymer (c)° with another olefin polymer resin with an unsaturated carboxylic acid or a derivative thereof.
- A thermoplastic resin composition containing 1 to 15 parts by weight of an olefin copolymer and having excellent chemical resistance and impact resistance.

■Melt index (Ml) 20g/10min
below.

■Density 0.86 (1-0,910g/
cm3゜■ Maximum peak temperature measured by differential scanning calorimetry (DSC) 100°C or higher.

■Boiling n-hexane insoluble matter: 10wt% or more.

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-)su(4-hydroxyphenyl)heptene-2,4,6-dimethyl-2.4.6-) (4-hydroxyphenyl)hebutane, 2.6-cymethyl-2.4
．． 6-)Su(4-hydroxyphenyl)hebutene-3
, 4,6-dimethyl-2.4.6-)su(4-hydroxyphenyl)butane, 1,3.5-)su(4-hydroxyphenyl)benzene, 1.1.1-)su(4- Polyhydroxy compounds exemplified by hydroxyphenyl)ethane, and 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, monovalent aromatic hydroxy compounds suitable for controlling the molecular weight include m- and p-methylphenol, m- and p-propylphenol, p-bromophenol, p-tert-butylphenol and p-long-chain alkyl-substituted Phenol and the like are preferred. Typical aromatic polycarbonate resins include polycarbonates whose main raw materials are bis(4-hydroxyphenyl)alkane compounds, especially bisphenol A;
Also included are polycarbonate copolymers obtained by using a combination of more than one type of aromatic dihydroxy compound, and branched polycarbonates obtained by using a small amount of a trivalent phenol compound. Aromatic polycarbonate resins may be used as a mixture of two or more types.

The aromatic saturated polyester resin of the present invention is a polymer obtained by reacting an aromatic dicarboxylic acid or its diester with a glycol or an alkylene oxide by a known method. Specifically, the aromatic saturated polyester resin etc. Examples of the component include polyethylene terephthalate and polytetramethylene terephthalate, which are obtained by reacting terephthalic acid or dimethyl terephthalate as a main component with ethylene glycol, butanediol, ethylene oxide, or the like. The aromatic saturated polyester resin may be a copolymer or a mixture of two or more thereof. The aromatic saturated polyester resin used in the present invention is prepared in a mixed solvent of phenol and tetrachloroethylene in a weight ratio of 6:4.
It is preferable that the intrinsic viscosity [η] measured at 30° C. is 0.8 or more, and if it is less than 0.8, the improvement in impact strength and chemical resistance will be insufficient.

Modified ethylene-α-olefin copolymer (c) of the present invention
Ethylene-α-olefin copolymer (c)° used for
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, and has the following properties (1) to (4). It is something.

■Ml: 20g/10min or less, preferably 0.
05~5g/10min 1 especially 0.2~4g/10m
in.

■Density: 0.860-0.910 g/cm
3゜■ Temperature of its maximum peak by differential scanning calorimetry (DSC) = 100°C or more, preferably 110-124
℃.

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

These conditions (1) to (4) are: (1) 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 insoluble matter in boiling n-hexane is a guideline for the proportion of amorphous parts and the content of low molecular weight components.When the insoluble matter is less than 1Qwt%, the amorphous parts and low molecular weight components 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]

2On++ from a heat press molded sheet with a thickness of 200cm
Three sheets of nX 30 mm are cut and each is extracted with boiling n-hexane for 5 hours using a Soxhlet extractor. After taking out the n-hexane insoluble matter and vacuum drying (7 hours, 50°C), it is calculated using the following formula.

[Measurement by DSC] Approximately 5 mg from a 100ρ 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.

Next, ethylene-α-olefin copolymer (c).

The α-olefin used in the production of
2 is preferred, propylene, butene-1,4
-Methyl-pentene-1, hexene-1, octene-1
, decene-1, dodesen-e, and the like.

The solid catalyst component is made by supporting a titanium compound on an inorganic solid compound containing magnesium using 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; 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, gold scrap chloride, 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),
Preferably, those represented by , titanium tetrachloride, titanium tetrabromide, titanium tetraiodide, monomethoxytrichlorotitanium, dimethoxychlorotitanium, trimethoxymonochlorotitanium, tetramethoxytitanium, monoethoxytrichlorotitanium, jetoxydichlorotitanium, 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 in Groups Ⅰ to Ⅲ of the periodic table. titanium compound; general formula Ti (OR)
,X,-.

(Here, R represents an alkyl group, aryl group, or aralkyl group having 1 to 20 carbon atoms, and X represents a halogen atom,
m is 0<m<4. ) is a trivalent titanium compound obtained by reducing a tetravalent alkoxy titanium halide with an organometallic compound of a metal of group 1 to group 1 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, 1X2 to R. R2A1OR
, RAI(OR)X and R,AL2X3 (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.

Using the above catalyst system, an ethylene-α-olefin copolymer (c)” is synthesized.

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 about 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/cffl
・G1 is preferably carried out at 2 to 60 kg/crl・G. Although the molecular weight can be controlled to some extent by changing polymerization conditions such as polymerization temperature and catalyst molar ratio, it is usually 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.

Ethylene-α-olefin copolymer (c)° as above
is clearly distinguished from conventional ethylene-α-olefin copolymers obtained with vanadium or vanadium as the main component as a solid catalyst component, and
It is also distinguished from lP[E (linear low density polyethylene). That is, even when the monomer components constituting the copolymer and the conventional copolymer are the same and the density is the same, the T
m is higher in the copolymer of the present invention, and the n-hexane insoluble content is 10 wt% or more in the copolymer of the present invention, whereas the conventional copolymer has no or no insoluble content. It is distinguished by the fact that it is in extremely small amounts. Also, LLDPt!
Commercially available products usually have a density of 0.920 g/cm3 or more, and the behavior of the temperature dispersion of dynamic viscoelasticity of LL[lPH is different from the behavior of the temperature dispersion of dynamic viscoelasticity of the one of the present invention. They are also distinguished in this respect.

In the present invention, the modified ethylene-α-olefin copolymer (c) described above and a composition (c) with other olefin polymer resin containing the ethylene-α-olefin copolymer (c) as a main component may also be used. It can be used as a raw material for copolymer (c).The amount of main component (c) in this composition is 60 wt% or more, preferably 70 wt% or more.Also, other olefin polymer resins Examples include polyethylene, polypropylene, polybutene-1, poly-4-
Olefin homopolymers such as methyl-pentene-1, or ethylene, propylene, butene-1,4-methyl-pentene, excluding the specific ethylene-α-olefin copolymer (co) of the present invention explained above 1. Hexene-
Examples include mutual copolymers of 1, octene-1, decene-1, dodecene-1, copolymers of ethylene and vinyl esters, unsaturated carboxylic acids, unsaturated carboxylic acid esters, and mixtures thereof.

Modified ethylene-α-olefin copolymer (c) of the present invention
is the ethylene-α-olefin copolymer (
c)° or a composition (c)” containing the copolymer (c)° and other olefinic polymer resin as a main component is modified with an unsaturated carboxylic acid or a derivative thereof.

Examples of the unsaturated carboxylic acids used in the present invention include -basic 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 carboxylic acid or derivative thereof to be added is determined based on the amount of the ethylene-α-olefin copolymer (c)" or a composition containing the copolymer (c) with another olefin polymer resin ( c)" is 0.05 to 10 wt%, preferably 0.1 to 3 wt%. The amount added is 10 wt%.
If it exceeds 0.35 wt %, there is a risk that decomposition and crosslinking reactions will occur in addition to the addition reaction, and if it is less than 0.35 wt %, the purpose of improving the moldability of the present invention cannot be achieved.

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

The reaction can be 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 dihexane, 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.

In addition, examples of organic peroxides used in the modification reaction 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 other copolymers containing the copolymer (c)'' as a main component are preferably used. Composition (c) of Olefin Polymer Resin 2 0.005 to 2.0 parts by weight, preferably 0.005 to 2.0 parts by weight, based on 100 parts by weight.
It is used in a range of 0.01 to 1.0 parts by weight. If the amount of organic peroxide used is less than 0.005 parts by weight, no modification effect is substantially exhibited, and even if it is added in excess of 2.0 parts by weight, it is difficult to obtain any further effect. At the same time, there is a risk that excessive decomposition or crosslinking reaction may occur.

The aromatic polycarbonate resin (a) of the present invention described in detail above, 60 to 90 parts by weight, the aromatic saturated polyester resin (b) 8 to 39 parts by weight, and modified ethylene-α-
The thermoplastic resin composition of the present invention is prepared by blending the olefin copolymer (c) in an amount of 1 to 15 plate parts and melt-mixing the mixture using an extruder, Banbury mixer, roll, or the like.

If the aromatic polycarbonate resin (a) is less than 60 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 aromatic saturated polycastyl resin (b) is less than 8 parts by weight, the improvement in chemical resistance will be insufficient, and if it exceeds 39 parts by weight, it will cause poor dimensional stability. Furthermore, a new modified ethylene-α
- If the olefin copolymer (c) is less than 1 part by weight, no improvement in chemical resistance or 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, while heat-resistant polyesters such as polyester carbonates and polyarylates (e.g., trade names: U Polymer, Unitika Gl) are used to improve moldability, flame retardance, and surface properties. 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.

Reference Example 1 Ethylene and butene-1 were copolymerized using a solid catalyst Jil obtained from substantially anhydrous magnesium chloride, 1,2-dichloroethane, and titanium tetrachloride, and a catalyst consisting of triethylaluminum to produce ethylene-butene-1. 1 copolymer (c)° was obtained.

The ethylene content of this copolymer was 91.5 mol%, M
I 1. Og/10min, density 0.905 g/
cm3, DSC maximum peak temperature is 121℃, boiling point 111
The n-hexane insoluble content was 90 wt%.

111 [water maleic acid 0.2
59 and 2,5-dimethyl-2,5-di(tertiary)
Butylperoxy)hexyne-30,021 was added and kneaded at 200° C. for 15 minutes in a Bamba IJ mixer to obtain a modified ethylene-butene-1 copolymer (c).

Reference Example 2 An ethylene-pro, pyrene copolymer (c )° was obtained.

The ethylene content of this copolymer is 81.5 mol%, M
I 0.5g/10min, density 0.890g/
cm3, the maximum peak temperature of DSC was 121.6°C, and the boiling n-hexane insoluble content was 60 wt%.

A modified ethylene-propylene copolymer (c) was obtained in the same manner as in Reference Example 1 except that this copolymer was used.

Examples 1 to 5 and Comparative Examples 1 to 5 Aromatic polycarbonate made from bisphenol A (manufactured by Mitsubishi Gas Chemical Co., Ltd., trade name Newpiron S-2000)
, molecular weight 25.000), polyethylene terephthalate (Nippon Unipet G-Ko Seibu, product name: Unipet RT-5
80, fq = 1.2. at30℃, phenol/
mixed solvent of tetrachloroethane = 6/dwt ratio) and polybutylene terephthalate (manufactured by Toyobo G9, trade name: Toughpet N-1200, @ = 1.2.at3
0°C, mixed solvent of phenol/tetrachloroethane = 6/dwt ratio) and the modified ethylene-α-olefin copolymer modified with maleic anhydride obtained in Reference Example 1.2 at the ratio shown in Table 1. Extruder with vent (40m
mφ, L/D=25, cylinder temperature 260°C (polyethylene terephthalate), 250°C (polybutylene terephthalate)) to melt and extrude the pellets, dry the pellets in a hot air dryer at 120°C for 5 hours or more, and then use the injection molding machine. A test piece for measuring physical properties was molded using the following method, and the physical properties were tested.

The results are shown in Table 1.

For comparison, aromatic polycarbonate resin alone (Comparative Example 1
), aromatic polycarbonate resin and polyethylene terephthalate (Comparative Example 2), high-density polyethylene (manufactured by Nippon Petrochemical Co., Ltd., product name: Staflef [
707, MI=0.7g/10min, density 0.950g
/cm') (Comparative Example 3), aromatic polycarbonate 1-resin and polybutylene lentiphthalate-1
- (Comparative Example 4) and a resin composition in which high-density polyethylene similar to Comparative Example 3 was added to the composition components of Comparative Example 4 (Comparative Example 5)
), the results were also shown in Table 1 in the same manner as above.

Note that the descriptions in the table are as follows.

Zero l Modified copolymer book 7 C1σy (=CC1-medium bending strength): Unit, Kg/cnf*8 Rockwell hardness: M scale.

[Operation and effect 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 composition of the present invention using the copolymer is also It is clear that it exhibits excellent properties in terms of fluidity, chemical resistance, heat resistance, and impact resistance.

Patent applicant: Mitsubishi Gas Chemical Co., Ltd. Japan Petrochemical Co., Ltd.

Claims (1)

[Scope of Claims] 1 (a) 60 to 90 parts by weight of an aromatic polycarbonate resin, (b) 8 to 39 parts by weight of an aromatic saturated polyester resin, and (c) having the following properties (1) to (4). and ethylene, which 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.
α-olefin copolymer (c)' or the copolymer (c
Modified ethylene-α-olefin copolymers 1 to 1 obtained by modifying a composition (c) with an unsaturated carboxylic acid or a derivative thereof with an unsaturated carboxylic acid or a derivative thereof.
A thermoplastic resin composition containing 15 parts by weight and having excellent chemical resistance and impact resistance. (1) Melt index 20g/10min or less (2
) Density: 0.860 to 0.910 g/cm^3 (3) Temperature of its maximum peak measured by differential scanning calorimetry (DSC): 100°C or higher (4) Boiling n-hexane insoluble content: 10 wt% or higher 2 Said α
- The thermoplastic resin composition according to claim 1, wherein the olefin has 3 to 12 carbon atoms. 3. The amount of the unsaturated carboxylic acid or its derivative used in the modified ethylene-α-olefin copolymer (c) is 0.
Claim 1 or 2 which is 05 to 10 wt%
The thermoplastic resin composition described in . 4. The thermoplastic resin composition according to claim 1, 2 or 3, wherein the unsaturated carboxylic acid or its derivative is maleic anhydride.