Molded body containing polycarbonate-polyorganosiloxane copolymer

Patent metadata

Field	Value
Publication number	US-11655326-B2
Application number	US-201816955996-A
Country	US
Kind code	B2
Filing date	Dec 27, 2018
Priority date	Dec 28, 2017
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

Provided is a molded body including a polycarbonate-polyorganosiloxane copolymer which contains a polycarbonate block (A-1) formed of a repeating unit having a specific structure and a polyorganosiloxane block (A-2) containing a repeating unit having a specific structure, and in which the content of the polyorganosiloxane block (A-2) is from 20 mass % or more to 70 mass % or less, wherein the molded body has a durometer hardness of from 25 or more to 72 or less measured with a type D durometer in conformity with JIS K 6253-3:2012.

First claim

The invention claimed is:

1. A molded body, comprising a polycarbonate-polyorganosiloxane copolymer (A) which contains a polycarbonate block (A-1) formed of a repeating unit represented by the following general formula (I) and a polyorganosiloxane block (A-2) containing a repeating unit represented by the following general formula (II), and in which a content of the polyorganosiloxane block (A-2) is from 20 mass % or more to 70 mass % or less,
wherein the polycarbonate-polyorganosiloxane copolymer (A) is the only polymer in the molded body;
the polycarbonate-polyorganosiloxane copolymer (A) has a molecular weight distribution of from 2.1 or more to 3.5 or less,
wherein the molded body has a durometer hardness of from 40 or more to 72 or less measured with a type D durometer in conformity with JIS K 6253-3:2012:

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, an arylene group having 6 to 12 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, and “a” and “b” each independently represent an integer of from 0 to 4.

2. The molded body according to claim 1 , wherein a content of a unit represented by the following general formula (III) in the polyorganosiloxane block (A-2) is 0.1 mol % or less:

wherein R 33 and R 34 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, R 31 represents 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, an arylene group having 6 to 12 carbon atoms, a fluorenediyl group, an arylalkylene group having 7 to 15 carbon atoms, or an arylalkylidene group having 7 to 15 carbon atoms, R 35 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, and “t” represents an average chain length of a polyorganosiloxane.

3. The molded body according to claim 1 , wherein the polyorganosiloxane block (A-2) has a number of repetitions of from 10 or more to less than 90.

4. The molded body according to claim 1 , wherein the polyorganosiloxane block (A-2) contains a unit represented by at least one of the following general formula (II-I), (II-II), or (II-III):

wherein R 3 to R 6 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 plurality of R 3 s, R 4 s, R 5 s, or R 6 s may be identical to or different from each other, Y represents —R 7 O—, —R 7 COO—, —R 7 NR 8 —, —COO—, —S—, —R 7 COO—R 9 —O—, or —R 7 O—R 10 —O—, and a plurality of Ys may be identical to or different from each other, the R 7 represents a single bond, a linear, branched, or cyclic alkylene group, an aryl-substituted alkylene group, a substituted or unsubstituted arylene group, or a diarylene group, R 8 represents an alkyl group, an alkenyl group, an aryl group, or an aralkyl group, R 9 represents a diarylene group, R 10 represents a linear, branched, or cyclic alkylene group, or a diarylene group, β represents a divalent group derived from a diisocyanate compound, or a divalent group derived from a dicarboxylic acid or a halide of a dicarboxylic acid, “n” represents a chain length of a polyorganosiloxane, and n−1, and “p” and “q” each represent a number of repetitions of a polyorganosiloxane unit and each represent an integer of 1 or more, and a sum of “p” and “q” is n−2.

5. The molded body according to claim 1 , wherein the polyorganosiloxane block (A-2) is represented by the following general formula (V):

wherein R 3 to R 6 and n−1 are the same as those described in the general formulae (II-I) to (II-III), and R 15 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.

6. The molded body according to claim 1 , wherein the polycarbonate-polyorganosiloxane copolymer (A) has a viscosity-average molecular weight of from 10,000 or more to 23,000 or less.

7. The molded body according to claim 1 , wherein the molded body has a total light transmittance of 75% or more measured in conformity with JIS K 7361-1:1997 when molded into a thickness of 2 mm.

8. The molded body according to claim 1 , wherein the molded body is an optical member.

9. The molded body according to claim 1 , wherein the molded body is at least one selected from a flexible display, a light guide plate, a housing, a water- or oil-repellent film, an optical adhesive, a switch cover, a heat sealing agent, a water stop material, a sealing agent, a connector, an adapter, a smartphone cover, a lens, a part for a pair of glasses or sunglasses, an optical fiber part, a cushion material for an on-vehicle battery, a wiper blade, a traffic mirror, a side mirror, a rearview mirror, a lamp cover, a bumper, a window, an exterior material, an interior material, an acoustic material, a steering wheel cover, a sensor cover, a watch part, stationery, a cosmetic container, an aquarium for rearing an aquatic organism, a sole, a cup, a nail art material, a toy, a lure, a suction cup, cooking tools including a steamer, clothes, a silicone wiping sheet, a remote controller cover, an umbrella, a metal container lining, a building material cover, a door, a window, a glass interlayer, a tent, a mirror, a shop window case, a plastic greenhouse, a medical equipment housing, a transfusion bag, a transfusion tube, an injection syringe, a feeding bottle, a mask, a face belt, a filter part, a damping part, a robot housing, a drone housing, a shield, a bulletproof shield, a sport cushion, a window for an aircraft, a resin compatibilizer, a lighting cover, a light guide, a light guide panel, a lighting unit, a prism panel, a flat lens, a Fresnel lens, a microlens array, and a collimator lens.

Assignees

• Idemitsu Kosan Co

Inventors

• IDETA Kazushige
• Ishii Hirotoshi
• Ishikawa Yasuhiro

Classifications

• C08G64/186 Primary

  containing polysiloxane sequences · CPC title

• 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

• C08G64/08

  containing atoms other than carbon, hydrogen or oxygen · CPC title

• C08G77/448

  containing polycarbonate sequences · CPC title

• C08F293/00 Primary

  Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule (on to polymers modified by introduction of unsaturated end groups C08F290/02) · CPC title