# US 11,111,386 B2 · Polycarbonate-polyorganosiloxane copolymer, polycarbonate resin composition including same, and molded product thereof

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- Number: US 11,111,386 B2
- Document ID: US11111386B2
- Status: Granted
- Kind: B2
- Application number: 16/490,048
- Filed: 2018-03-01
- Published: 2020-01-09
- Granted: 2021-09-07
- Earliest claimed: 2017-03-01
- Assignees: Idemitsu Kosan Co., Ltd.
- Applicants: Idemitsu Kosan Co., Ltd.
- Inventors: Yasuhiro Ishikawa; Tomoko Abe; Takafumi Akimoto
- Web page: https://patentgrep.com/patent/US11111386B2

## CPC

- C08L 83/04: Polysiloxanes
- C08G 64/18: Block or graft polymers
- C08G 64/186: {containing polysiloxane sequences}
- C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence)
- C08L 69/00: Compositions of polycarbonates; Compositions of derivatives of polycarbonates
- C08G 63/183: Terephthalic acids
- C08G 64/06: not containing aliphatic unsaturation
- C08G 77/448: containing polycarbonate sequences
- C08L 67/00: Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers
- C08L 2203/20: use in electrical or conductive gadgets
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

Provided is a polycarbonate-polyorganosiloxane copolymer including polycarbonate blocks (A-1) each formed of a specific repeating unit and polyorganosiloxane blocks (A-2) each containing a specific repeating unit, wherein the polycarbonate-polyorganosiloxane copolymer satisfies the following expression (F1a): 15≤wM1 (F1a) wherein wM1 represents the average content of the polyorganosiloxane blocks (A-2) in polycarbonate-polyorganosiloxane copolymers each having a molecular weight determined by using a polycarbonate as a conversion reference of from 56,000 or more to 200,000 or less among polycarbonate-polyorganosiloxane copolymers obtained through the separation of the polycarbonate-polyorganosiloxane copolymer by gel permeation chromatography.

## Claims

### Claim 1

A polycarbonate-based resin composition, comprising:
a polycarbonate-polyorganosiloxane copolymer (A) comprising polycarbonate blocks (A-1) each formed of a repeating unit represented by the following general formula (I); and
polyorganosiloxane blocks (A-2) each containing a repeating unit represented by the following general formula (II), wherein the polycarbonate-polyorganosiloxane copolymer satisfies the following expression (F1a):
15≤wM1 (F1a)
wherein wM1 represents an average content (mass %) of the polyorganosiloxane blocks (A-2) in polycarbonate-polyorganosiloxane copolymers each having a molecular weight determined by using a polycarbonate as a conversion reference of from 56,000 or more to 200,000 or less among polycarbonate-polyorganosiloxane copolymers obtained through separation of the polycarbonate-polyorganosiloxane copolymer by gel permeation chromatography;
an aromatic polycarbonate-based resin (B) except the polycarbonate-polyorganosiloxane copolymer (A); and
a polyester-based resin (C),
wherein the polyester-based resin (C) is blended with respect to 100 parts by mass of a total of the polycarbonate-polyorganosiloxane copolymer (A) and the aromatic polycarbonate-based resin (B), and
wherein a ratio of the polycarbonate-polyorganosiloxane copolymer (A) and the aromatic polycarbonate-based resin (B) in 100 mass % of a total amount of the polycarbonate-polyorganosiloxane copolymer (A) and the aromatic polycarbonate-based resin (B), and the polyester-based resin (C) is from 50 mass % or more to 99 mass % or less:
wherein R1 and R2 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—, —SO2—, —O—, or —CO—, R3 and R4 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, and “a” and “b” each independently represent an integer of from 0 to 4.

### Claim 2 (depends on 1)

The polycarbonate-polyorganosiloxane copolymer according to claim 1, wherein the aromatic polycarbonate-based resin (B) contains a polycarbonate block including, in a main chain thereof, a repeating unit represented by the following general formula (III):
wherein R30 and R31 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, —S—, —SO—, —SO2—, —O—, or —CO—, and “d” and “e” each independently represent an integer of from 0 to 4.

### Claim 3 (depends on 1)

The polycarbonate-based resin composition according to claim 1, wherein a mass ratio “(A)/(B)” of the polycarbonate-polyorganosiloxane copolymer (A) to the aromatic polycarbonate-based resin (B) is from 0.1/99.9 to 99.9/0.1.

### Claim 4 (depends on 1)

The polycarbonate-based resin composition according to claim 1, wherein a content of the polyorganosiloxane blocks (A-2) with respect to a total of the polycarbonate-polyorganosiloxane copolymer (A) and the aromatic polycarbonate-based resin (B) is from 0.1 mass % or more to 10 mass % or less.

### Claim 5 (depends on 1)

The polycarbonate-based resin composition according to claim 1, wherein a polycarbonate-based resin formed of the polycarbonate-polyorganosiloxane copolymer (A) and the aromatic polycarbonate-based resin (B) has a viscosity-average molecular weight (Mv) of from 9,000 or more to 50,000 or less.

### Claim 6 (depends on 1)

The polycarbonate-based resin composition according to claim 1, wherein the polyester-based resin (C) comprises at least one selected from a polyethylene terephthalate and a polybutylene terephthalate.

### Claim 7 (depends on 1)

A molded article, which is obtained by molding the polycarbonate-based resin composition of claim 1.

### Claim 8 (depends on 7)

The molded article according to claim 7, wherein the molded article comprises a casing for electrical and electronic equipment.

### Claim 9 (depends on 7)

The molded article according to claim 7, wherein the molded article comprises a part for an automobile and a building material.