Thermoplastic transparent resin composition

Patent metadata

Field	Value
Publication number	US-9657168-B2
Application number	US-201113642936-A
Country	US
Kind code	B2
Filing date	May 2, 2011
Priority date	May 7, 2010
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

To provide a highly transparent thermoplastic resin composition without requiring, for example, a special molecular design or incorporation of an additive, with the refractive index of the composition being readily controllable.
The highly transparent and refractive-index-controllable thermoplastic resin composition can be produced by blending a thermoplastic resin (A) containing a structural unit derived from a (meth)acrylic acid ester monomer represented by a specific chemical formula and a structural unit derived from an aromatic vinyl monomer represented by a specific chemical formula, with a thermoplastic resin (B) obtained by hydrogenating aromatic double bonds of a thermoplastic resin which contains a structural unit derived from a (meth)acrylic acid ester monomer represented by a specific chemical formula and a structural unit derived from an aromatic vinyl monomer represented by a specific chemical formula.

First claim

The invention claimed is:

1. A method for producing a thermoplastic transparent resin composition comprising a thermoplastic resin (A) and a thermoplastic resin (B) by blending the resins (A) and (B) in a ratio of mass of the resin (A) to the resin (B) of from 10/90 to 90/10:
the thermoplastic resin (A) being a thermoplastic resin comprising a methyl methacrylate structural unit and a styrene structural unit, wherein the amount of the methyl methacrylate structural unit of the resin (A) is 25 to 35 mol % on the basis of the total amount of all the structural units of the resin (A); and
the thermoplastic resin (B) obtained by hydrogenating 95% or more of aromatic double bonds of styrene structural unit of a thermoplastic resin which comprises a methyl methacrylate structural unit and the styrene structural unit, wherein the amount of the methyl methacrylate structural unit of the resin (B) is 55 to 73 mol % on the basis of the total amount of all the structural units of the resin (B);
wherein a piece molded from the composition and having a thickness of 3.2 mm exhibits a haze of 5% or less as measured through the transmission method.

2. The method according to claim 1 , which comprises the amount of the methyl methacrylate structural unit of the resin (B) 55 mol % to less than 65 mol % on the basis of the total amount of all the structural units of the resin (B).

Assignees

• Aoki Yoshio
• Sato Kazuya
• Oguro Hiroki
• Koike Nobuyuki
• Mitsubishi Gas Chemical Co

Inventors

• Aoki Yoshio
• Sato Kazuya
• Oguro Hiroki
• Koike Nobuyuki

Classifications

• C08F220/14

  Methyl esters {, e.g. methyl (meth)acrylate} · CPC title

• G11B7/2533

  comprising resins · CPC title

• C08F212/08

  Styrene · CPC title

• C08L33/12 Primary

  Homopolymers or copolymers of methyl methacrylate · CPC title

• C08F210/14

  Monomers containing five or more carbon atoms · CPC title