申请人:Asahi Kasei Kabushiki Kaisha
公开号:EP3795632A1
公开(公告)日:2021-03-24
The present invention provides a methacrylic resin composition comprising
100 parts by mass of a methacrylic resin comprising 50 to 97% by mass of a methacrylic acid ester monomer unit (A), 3 to 30% by mass of a structural unit (B) having a ring structure in the backbone, and 0 to 20% by mass of an additional vinyl monomer unit (C) copolymerizable with a methacrylic acid ester monomer, and
0.001 to 0.2 parts by mass of a compound (D) having a predetermined structure,
the methacrylic resin composition satisfying the following conditions (I) and (II):
(I): a weight-average molecular weight of the methacrylic resin composition as measured by gel permeation chromatography (GPC) is 65,000 to 300,000, and
(II): a mass ratio between the component (D) and the structural unit (B) having a ring structure in the backbone is 25 ≤ (B)/(D) ≤ 1000.
本发明提供了一种甲基丙烯酸树脂组合物,该组合物包括
100 份(质量)的甲基丙烯酸树脂,其中包括 50% 至 97% (质量)的甲基丙烯酸酯单体单元 (A)、3% 至 30% (质量)的结构单元 (B)(骨架中具有环状结构)和 0% 至 20% (质量)的可与甲基丙烯酸酯单体共聚的额外乙烯基单体单元 (C),以及
0.001 至 0.2 质量份具有预定结构的化合物 (D)、
甲基丙烯酸树脂组合物满足以下条件(I)和(II):
(I):经凝胶渗透色谱法(GPC)测定,甲基丙烯酸树脂组合物的重量平均分子量为 65,000 至 300,000,以及
(II): 成分(D)与骨架中具有环状结构的结构单元(B)的质量比为 25 ≤ (B)/(D) ≤ 1000。