Polycarbonate resin composition

Patent metadata

Field	Value
Publication number	US-2016355678-A1
Application number	US-201515118048-A
Country	US
Kind code	A1
Filing date	Feb 13, 2015
Priority date	Feb 13, 2014
Publication date	Dec 8, 2016
Grant date	—

Abstract

Provided is a polycarbonate resin composition, including: a polycarbonate resin (A) containing a polycarbonate-polyorganosiloxane copolymer (A-1) having a specific structure; a copolymer (B) having constituent units derived from acrylonitrile and styrene, and being free of a constituent unit derived from methyl methacrylate; and a copolymer (C) having constituent units derived from butadiene and methyl methacrylate, in which a content of the polyorganosiloxane block moiety in the entire resin composition is from 0.50 mass % to 10 mass %, and a content of the constituent unit derived from butadiene in the entire resin composition is from 3 mass % to 10 mass %.

First claim

1 . A polycarbonate resin composition, comprising:
a polycarbonate resin (A) containing a polycarbonate-polyorganosiloxane copolymer (A-1) having a polycarbonate block comprising a repeating unit represented by the general formula (I) and a polyorganosiloxane block comprising a repeating unit represented by the general formula (II); a copolymer (B) having constituent units derived from acrylonitrile and styrene, and being free of a constituent unit derived from methyl methacrylate; and a copolymer (C) having constituent units derived from butadiene and methyl methacrylate, wherein a content of the polyorganosiloxane block moiety in the entire resin composition is from 0.50 mass % to 10 mass %, and a content of the constituent unit derived from butadiene in the entire resin composition is from 3 mass % to 10 mass %:

wherein R 1 and R 2 each independently represent a halogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms, X represents a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, a fluorenediyl group, an arylalkylene group having 7 to 15 carbon atoms, an arylalkylidene group having 7 to 15 carbon atoms, —S—, —SO—, —SO 2 —, —O—, or —CO—, R 3 and R 4 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms, a and b each independently represent an integer of from 0 to 4, and n represents an average number of repetitions.

2 . The polycarbonate resin composition according to claim 1 , wherein a content of the polyorganosiloxane block moiety in the polycarbonate resin (A) is from 0.75 mass % to 15 mass %.

3 . The polycarbonate resin composition according to claim 1 , wherein the component (B) contains an acrylonitrile-butadiene-styrene terpolymer (B-1).

4 . The polycarbonate resin composition according to claim 3 , wherein the component (B) further contains an acrylonitrile-styrene bipolymer (B-2).

5 . The polycarbonate resin composition according to claim 1 , wherein the component (C) contains one or more selected from a methyl methacrylate-butadiene-styrene terpolymer and a methyl methacrylate-butadiene bipolymer.

6 . The polycarbonate resin composition according to claim 4 , wherein a content of the component (B-1) is from 8 parts by mass to 100 parts by mass, a content of the component (B-2) is 25 parts by mass or less, and a content of the component (C) is from 0.5 part by mass to 8 parts by mass with respect to 100 parts by mass of the component (A).

7 . The polycarbonate resin composition according to claim 3 , wherein a content of the constituent unit derived from butadiene in the component (B-1) is from 8 mass % to 75 mass %.

8 . The polycarbonate resin composition according to claim 4 , wherein a melt volume rate (MVR) of the component (B-2) measured at a temperature of 200° C. and a load of 10 kgf is from 3 cm 3 /10 min to 150 cm 3 /10 min.

9 . The polycarbonate resin composition according to claim 1 , further comprising a flame retardant (D).

10 . The polycarbonate resin composition according to claim 9 , wherein the component (D) comprises a phosphorus-based flame retardant.

11 . The polycarbonate resin composition according to claim 10 , wherein the phosphorus-based flame retardant comprises a condensed phosphate.

12 . The polycarbonate resin composition according claim 9 , wherein a content of the flame retardant (D) is from 10 parts by mass to 40 parts by mass with respect to 100 parts by mass of the component (A).

13 . A molded body, comprising the polycarbonate resin composition of claim 1 .

Assignees

• Idemitsu Kosan Co

Inventors

• Murakami Tsuyoshi
• Okamoto Yoshio

Classifications

• C08K5/523

  with hydroxyaryl compounds · CPC title

• C08G77/448

  containing polycarbonate sequences · CPC title

• C08L69/00 Primary

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title

• C08L35/06

  Copolymers with vinyl aromatic monomers · CPC title

• C08L51/04

  grafted on to rubbers · CPC title