Granted Patent B2

US 12,428,557 · App. 17/622,221 · Granted Sep 30, 2025

Inventors: Kazushige Ideta (Chiba, JP); Yasuhiro Ishikawa (Ichihara, JP); Hirotoshi Ishii (Kisarazu, JP)

Assignee: IDEMITSU KOSAN CO., LTD.

C08L69/00B29C45/0001C08G64/186C08G77/448C08K5/3475C08L83/04B29K2069/00B29K2083/00C08K5/42C08L33/06C08L63/00C08L71/02

Abstract

Claims (19)

1. A molded body, comprising a polycarbonate-based resin composition consisting of:

a polycarbonate-polyorganosiloxane copolymer (A); and

at least one kind of compound (B) selected from the group consisting of an antioxidant, a dye, a release agent, a light-diffusing agent, a flame retardant, a UV absorber, a silicone-based compound, an epoxy compound, and a polyether compound,

wherein the polycarbonate-polyorganosiloxane copolymer (A) consists of a polycarbonate block (A-1) consisting of a repetition of a unit represented by the following general formula (I) and a polyorganosiloxane block (A-2) containing a unit represented by the following general formula (V) and optionally, a terminal stopper derived unit,

wherein the molded body has a durometer hardness of from 40 or more to 72 or less, which is measured with a type D durometer in conformity with JIS K 6253-3:2012,

wherein a content of the polyorganosiloxane block (A-2) in the molded body is from 25 mass % or more to 70 mass % or less:

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, 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 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 , R 4 , R 5 , or R 6 may be identical to or different from each other,

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,

“a” and “b” each independently represent an integer of from 0 to 4, and

n-1 represents an integer of 1 or more representing the number of repetitions of the polyorganosiloxane unit.

2. The molded body according to claim 1 , wherein the polycarbonate-based resin composition contains 0.001 part by mass to 0.5 part by mass of the antioxidant, 0.00001 part by mass to 0.05 part by mass of the dye, 0.001 part by mass to 0.5 part by mass of the release agent, 0.1 part by mass to 5 parts by mass of the light-diffusing agent, 0.001 part by mass to 20 parts by mass of the flame retardant, 0.01 part by mass to 1 part by mass of the UV absorber, 0.01 part by mass to 0.25 part by mass of the silicone-based compound, more than 0 parts by mass to 0.2 part by mass of the epoxy compound, and/or 0.2 part by mass to 1 part by mass of the polyether compound with respect to 100 parts by mass of the polycarbonate-polyorganosiloxane copolymer (A).

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 polycarbonate-polyorganosiloxane copolymer (A) has a viscosity-average molecular weight of from 10,000 or more to 23,000 or less.

5. The molded body according to claim 1 , wherein the content of the polyorganosiloxane block (A-2) in the molded body is from more than 40 mass % to 70 mass % or less.

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

7. 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 45.

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-guiding plate, a housing, a water- and 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 cushioning material for an on-vehicle battery, a wiper blade, a convex traffic mirror at a road curve, a side mirror, a rearview mirror, a lamp cover, a bumper, a window, an exterior material, an interior material, a sound-absorbing material, a steering wheel cover, a sensor cover, a watch part, stationery, a cosmetic container, a water tank for breeding an aquatic organism, a shoe sole, a cup, nail art, a toy, a lure, a suction cup, a cooking utensil, 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 intermediate layer, a tent, a mirror, a show window case, a plastic greenhouse, a medical equipment casing, an infusion bag, an infusion tube, a syringe, a baby bottle, a mask, a face belt, a filter part, a damping part, a robot casing, a drone casing, a shield, a bulletproof shield, a sport cushion, a window for an aircraft, a resin compatibilizer, a lighting cover, a light guide, a light-guiding panel, a lighting unit, a prism panel, a flat-plate lens, a Fresnel lens, a microlens array, and a collimator lens.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (57)