JPS60184552A - Polycarbonate resin composition - Google Patents

Abstract

PURPOSE:To provide the titled compsn. having excellent flexural modulus and resistance to chemicals and impact, by blending an arom. polyester resin and a metallic ion-contg. ethylene copolymer with an arom. polycarbonate resin. CONSTITUTION:1-100pts.wt. arom. polyester resin and 0.5-20pts.wt. metallic ion-contg. ethylene copolymer obtd. by bonding a metallic ion such as Zn or Mg ion to a copolymer of ethylene with an unsaturated carboxylic acid such as (meth)acrylic acid, are blended with 100pts.wt. arom. polycarbonate resin.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to polycarbonate resin compositions. Specifically, the present invention relates to a polycarbonate resin composition having excellent chemical resistance, impact resistance, and flexural modulus.

Aromatic polycarbonate resins have excellent mechanical properties, but their chemical resistance is not sufficient, and if this could be improved, their value would be even greater.

As a method for improving the chemical resistance of aromatic polycarbonate resins, a method of blending an aromatic polyester resin and a butadiene-based graft copolymer with an aromatic polycarbonate resin is known (Japanese Patent Publication No. Sho Yoyoichi Tag 31). When using this method, chemical resistance can be greatly improved, but the bending modulus is greatly reduced, and impact resistance, especially in terms of the occurrence of dents and cranks during a collision, is not fully satisfactory. I couldn't say yes.

The inventors of the present invention have conducted intensive research to obtain a polycarbonate resin composition that has excellent chemical resistance and mechanical properties, and have found that when a specific resin is combined with an aromatic polycarbonate resin, the objective cannot be achieved. After discovering what could be done, the present invention was completed.

That is, the purpose of the present invention is to provide a polycarbonate resin composition that has great industrial value.
The gist is: 100 parts by weight of aromatic polycarbonate resin, aromatic polyester resin) I″k /~i
oo parts by weight and 0.0 parts by weight of metal ion-containing ethylene copolymer.
This is a polycarbonate resin composition consisting of 6-20 overlapping parts.

The present invention will be explained in detail below.

The aromatic polycarbonate resin used in the present invention is a polymer obtained by a phosgene method in which various dihydroxydiaryl compounds are reacted with phosgene, or a transesterification method in which a dihydroquine diaryl compound is reacted with a carbonate ester such as diphenyl carbonate. Typical examples include λ, 2-bis(4
Examples include polycarbonate resins made from t-hydroxyphenyl) flonogen (bisphenol A).

In addition to bisphenol A, the dihydroxydiaryl compounds include bis(couhydroxyphenyl)methane, l,/-bis(couhydroxyphenyl)ethane, λ
1.2-bis(couhydroquinphenyl)butane,
2-bis(couhydroxyphenyl)octane, bis(
hydroxyphenyl)phenylmethane, 2,2-bis(≠-hydroxy-3-methylphenyl)furonogun, /, /-bis(cuhydroxy-J-g3butylphenyl)furonogun, , 2. ．． 2-bis(Hiro-hydroxy-3-promophenyl)solozone, 2.2-
Bis(II-hydroxy-3,terdibromophenyl)
Furonogun, 2,2-bis(lI-hydroxy-3,j
bis(hydroxyaryl) alkanes such as /, /-bis(couhydroxyphenyl)cyclobentane, /, /-bis(couhydroxyphenyl)cyclohexane, ) Fuchloroalkanes, ≠, q'-dihydroxydiphenyl ether, <z, dihydroxydiarylethers such as 4t'-dihydroxy-J, J'-dimethyldiphenyl ether, ≠, Hiro'-dihydroquine diphenyl sulfide, <z, Dihydroxydiaryl sulfide a, such as +'-dihydroxy-3,3'-dimethyldiphenyl sulfide, <Z+≠'
-dihydroxydiphenyl sulfoxide %l, dihydroxydiaryl sulfoxides such as dihydroxydihydroxy-3,3'-dimethyldiphenyl sulfoxide, ≠
, l/l'-dihydroxydiphenylsulfone, ≠
Examples include dihydroxydiarylsulfones such as '-dihydroxy-3°3'-dimethyldiphenylsulfone.

These can be used alone or in a mixture of two or more,
In addition to these, hydroquinone, resorcinol, ≠, ≠′−
Dihydroxydiphenyl and the like may be used in combination.

Aromatic polyester resin is polyalkylene terephthalate obtained by polycondensation reaction of terephthalic acid or its dialkyl ester with aliphatic glycols, or a copolymer mainly composed of this, and a typical example is polyethylene terephthalate. , polybutylene terephthalate, etc.

Examples of the aliphatic glycols include ethylene glycol, propylene glycol, tetramethylene glycol,
Examples include hexamethylene glycol, but together with these aliphatic glycols, a small amount of other diols or polyhydric alcohols, such as cyclohexanediol, cyclohexane dimetatool, Len glycol, co, 2-
Bis(couhydroxyphenyl)zoro/gun1. ! , Corbis (Hiro-hydroxy-3,j-cyflomophenyl)
Furo/Fn, 2.2-His(lI-hydroxyethoxyphenyl) Solo/! N, CO, 2-bis(≠-hydroxyethquin-3.!-dibromophenyl) 7″r:1/ξ
You may use a mixture of glycerin, intererythritol, etc.

In addition, together with terephthalic acid or its dialkyl ester, a small amount of other dibasic acid, polybasic acid or its alkyl ester, such as terephthalic acid or its dialkyl ester, may be used in an amount of up to 20% by weight of phthalic acid, isophthalic acid, or naphthalene dicarboxylic acid. Acid, diphenyldicarboxylic acid, adipic acid, heptanodic acid, trimesic acid, trimellitic acid, alkyl esters thereof, and the like may be used as a mixture.

The blending amount of the aromatic polyester resin is 7 to 100 parts by weight, preferably j-60 parts by weight, based on 100 parts by weight of the aromatic polycarbonate resin. If the amount is too small, the effect of improving chemical resistance will not be sufficient, whereas if it is too large, the impact resistance will be lowered, which is not preferable.

The metal ion-containing ethylene copolymer used in the present invention is
It is a copolymer of ethylene and an unsaturated carboxylic acid such as acrylic acid or methacrylic acid to which metal ions such as sodium, zinc, or magnesium are bonded, and is generally called an ionomer.For example, and DuPont's ionomer resin (trademark: Surlyn).

What is the amount of metal ion-containing ethylene copolymer?

0.0% per 100 parts by weight of aromatic polycarbonate resin.
3-20 parts by weight, preferably /~it parts by weight. If it is too small, the effect of improving impact resistance will be small. On the other hand, if the content is too high, the elastic modulus decreases, and although the chemical resistance is not adversely affected so much, the thermal stability decreases.

Further, as the metal salt, an alkali metal such as Na is preferable.

In order to prepare the composition of the present invention, the above-mentioned components may be mixed at any stage up to the production of the final molded article. For example, a method of mixing powders or pellets of the above-mentioned three components,
Examples include a method of melt-kneading the mixture using an extruder or the like and extruding it into pellets. They may be mixed during the polymerization process.

The polycarbonate resin composition of the present invention also contains fibrous reinforcing agents such as glass fibers, carbon fibers, and metal fibers, fillers such as phosphoric acid, alumina, phosphoric acid alumina, clays, glass peas, and carbon black, aromatic Known additives such as flame retardants such as halogen compounds, stabilizers such as phosphorous esters and phosphoric esters, other lubricants, ultraviolet absorbers, and coloring agents may be added.

The polycarbonate resin composition of the present invention has excellent chemical resistance, impact resistance, and flexural modulus. It can be made into molded products that are excellent as craft materials.

EXAMPLES Hereinafter, the present invention will be specifically explained with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist thereof.

In the examples, "parts" and "%" indicate "parts by weight" and "parts by weight," respectively.

In addition, the bending strength and bending modulus are ASTM D70
Accordingly, the Izot impact strength (//za”) is A13T.
These are the results measured according to M D , 2jA.

The DuPont impact test was carried out using a DuPont impact tester manufactured by Toyo Seiki.
A 1 kg copper ball is moved from a height of 1 m at ℃ with a tip radius of l//6"
The object was dropped into a cone and the state of the impact surface was observed.

Chemical resistance was determined by bending a tensile test piece specified by ASTM D 431 to a bending strain of o', zs, immersing it in gasoline in VC for 1 minute, and then immersing it in gasoline at 23°C for 2 minutes.
ASTM D for specimens left to dry for m hours
638'. The larger the elongation, the better the chemical resistance.

Example 1 and Comparative Examples/~3 Polycarbonate resin 7 with number average molecular weight of 27.00θ
00 parts, the amount shown in the table below has an intrinsic viscosity of 0.00 parts. tjc
m/? Polyethylene terephthalate and a metal ion-containing ethylene copolymer (manufactured by DuPont, trade mark: Surlyn/601) were mixed and melt-kneaded at 210° C. using a ≠Osrs 421 extruder and extruded into pellets.

The pellets are processed using a 3.6 oz injection molding machine (Toshiba Machine ■).
Injection molding was carried out using a mold for molding a test piece (Model 71S, manufactured by Manufacturer Co., Ltd.) at a resin temperature of 0° C., a mold temperature of 10° C., an injection time of 73 seconds, and a cooling time of 20 seconds.

The physical properties of the obtained molded article were as shown in Table 1 below.

For comparison, cases where only polycarbonate was used (Comparative Example/), cases where the metal ion-containing ethylene copolymer was not used (Comparative Example 2), and cases where butadiene-based graft copolymer was used instead of the metal ion-containing ethylene copolymer were used. The results obtained when a polymer (manufactured by Mitsubishi Rayon ■, methyl methacrylate-butadiene-styrene copolymer, trademark: Metaprene C, Z23) was used (Comparative Example 3) are also shown.

Claims (1)

[Claims] (1) 100 parts by weight of aromatic polycarbonate resin, ~ioo parts by weight of aromatic polyester resin, and metal ion-containing ethylene copolymer. , 5~. A polycarbonate resin composition consisting of 20 parts by weight.