公开(公告)号：US20160326360A1

公开(公告)日：2016-11-10

申请号：US15216265

申请日：2016-07-21

Applicant: DENKA COMPANY LIMITED

Inventor： Tetsuo NOGUCHI ,  Takeshi OHTSUKA ,  Masanori MATSUMOTO ,  Yuichi SHINDO

IPC: C08L35/02 ,  C08J5/18 ,  G02B1/04 ,  C08L33/12

CPC classification number: C08L35/02 ,  C08F24/00 ,  C08F212/08 ,  C08F220/10 ,  C08F222/02 ,  C08J5/18 ,  C08J2333/00 ,  C08J2333/12 ,  C08J2335/02 ,  C08J2433/12 ,  C08J2435/02 ,  C08L25/14 ,  C08L33/06 ,  C08L33/08 ,  C08L33/12 ,  C09J133/06 ,  G02B1/04 ,  C08F220/14 ,  C08F222/08

Abstract: A copolymer for improving heat resistance of a methacrylic resin which can achieve preservation of excellent transparency of the methacrylic resin and improvement in heat resistance, and can provide a molded product having excellent appearance, by adding the copolymer to the methacrylic resin, is provided. According to the present invention, a copolymer for improving heat resistance of a methacrylic resin, including: 45 to 85 mass % of an aromatic vinyl monomer unit; 5 to 45 mass % of a (meth)acrylic acid ester monomer unit; and 10 to 20 mass % of an unsaturated dicarboxylic acid anhydride monomer unit; wherein the copolymer has a total light transmittance of 88% or more, the total light transmittance being measured in accordance with ASTM D1003 for a sample with 2 mm-thickness, is provided.