US 6,143,826 AGranted

Polymer blend

AssigneeKuraray Co., Ltd.

InventorsTakashi Ohnaga, Katsunori Takamoto, Yukihiro Fujieda, Katsuei Takahashi, Kenichi Hamada

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Abstract

A polymer blend comprising: (A) an acrylic resin; (B) a block copolymer consisting essentially of a polymer block of a polymerized aromatic vinyl compound and/or a polymer block of a polymerized methacrylate monoester and a polyolefin polymer block; and (C) a polymer miscible with the acrylic resin (A) and immiscible with the block copolymer (B), wherein the absolute value (.vertline..eta..sub.AC -.eta..sub.B .vertline.) of the difference between the refractive index (.eta..sub.AC) of the blend of the acrylic resin (A) and the polymer (C) and the refractive index (.eta..sub.B) of the block copolymer (B) is 0.01 or less. This polymer block has excellent transparency, softness and other properties.

Claims18

Dependent claims

A polymer blend with good softness comprising:

(A) an acrylic resin having a methyl methacrylate unit content ranging from 80 to 100% by weight;
(B) A block copolymer consisting essentially of a polymer block of a polymerized aromatic vinyl compound and/or a polymer block of a polymerized methacrylate monoester and a polyolefin polymer block;
and
(C) at least one polymer selected from the group consisting of styrene/acrylonitrile copolymer, a phenoxy resin and a styrene/maleic anhydride copolymer miscible with acrylic resin (A) and immiscible with block copolymer (B), wherein the absolute value (.vertline..eta..sub.AC -.eta..sub.B .vertline.) of the difference between the refractive index (.eta..sub.AC) of the blend of the acrylic resin (A) and the polymer (C) and the refractive index (ROB) of the block copolymer (B) is 0.01 or less;
and
wherein said blend is obtained by melt mixing of components (A), (B) and (C).

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/936,599Filed 24 Sep 1997
Priority: JP 8-27870030 Sep 1996
Granted: 7 Nov 2000
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

C08L 53/005
Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated…:…
C08L 33/06
Homopolymers or copolymers of esters: of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the…
C08L 53/00
Compositions of block copolymers containing at least one sequence of a polymer
C08L 101/00
Compositions of unspecified macromolecular compounds