Polyorganosiloxane, polycarbonate-polyorganosiloxane copolymer, and production method therefor

Patent metadata

Field	Value
Publication number	US-10189942-B2
Application number	US-201415300694-A
Country	US
Kind code	B2
Filing date	Dec 12, 2014
Priority date	Mar 31, 2014
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

Provided is a polyorganosiloxane, wherein a value obtained by integrating dw/d log(M) from 2.5≤log(M)≤3.1 is 0 to 10% of a value obtained by integrating dw/d log(M) over the entire range of log (M) in a differential molecular weight distribution curve, wherein the differential molecular weight distribution curve is determined by gel permeation chromatography using the polystyrene calibration curve, has an x-axis showing a logarithmic value log(M) of a molecular weight M and has a y-axis showing dw/d log(M) obtained by differentiating a concentration fraction w with respect to the logarithmic value log(M) of the molecular weight.

First claim

The invention claimed is:

1. A polycarbonate-polyorganosiloxane copolymer, comprising:
a polycarbonate block (A) comprising a repeating unit represented by the following general formula (I); and
a polyorganosiloxane block (B) comprising a repeating unit represented by the following general formula (II),
wherein the polyorganosiloxane block (B) has a value obtained by integrating dw/d log(M) from 2.5≤log(M)≤3.1 is 0 to 10% of a value obtained by integrating dw/d log(M) over the entire range of log (M) in a differential molecular weight distribution curve,
wherein the differential molecular weight distribution curve is determined by gel permeation chromatography using the polystyrene calibration curve, has an x-axis showing a logarithmic value log(M) of a molecular weight M and has a y-axis showing dw/d log(M) obtained by differentiating a concentration fraction w with respect to the logarithmic value log(M) of the molecular weight:

wherein, R 9 and R 10 each independently represents 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—; a and b each independently represents an integer of 0 to 4; R 1 and R 2 each independently represents 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; an average repeat number n in the range of 30 to 50 represents a sum of siloxane repeating units in the polyorganosiloxane block.

2. The polycarbonate-polyorganosiloxane copolymer according to claim 1 , wherein the dw/d log(M) value becomes maximum in the range of 3.3≤log(M)≤3.9 in the differential molecular weight distribution curve of the polyorganosiloxane block (B).

3. The polycarbonate-polyorganosiloxane copolymer according to claim 1 , wherein content of the polyorganosiloxane block (B) in the polycarbonate-polyorganosiloxane copolymer is in the range of 0.5 to 20% by mass.

4. The polycarbonate-polyorganosiloxane copolymer according to claim 1 , wherein a viscosity-average molecular weight thereof is in the range of 12,000 to 40,000.

5. A molded article, which is obtained by molding the polycarbonate-polyorganosiloxane copolymer according to claim 1 .

Assignees

• Idemitsu Kosan Co

Inventors

• Ishikawa Yasuhiro
• Abe Tomoko

Classifications

• C08L83/10

  Block- or graft-copolymers containing polysiloxane sequences (obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00) · CPC title

• C08G77/448 Primary

  containing polycarbonate sequences · CPC title

• C08G64/186 Primary

  containing polysiloxane sequences · CPC title

• C08G77/24

  halogen-containing groups · CPC title

• C08G77/20

  containing silicon bound to unsaturated aliphatic groups · CPC title