公开(公告)号：US20240002566A1

公开(公告)日：2024-01-04

申请号：US18368766

申请日：2023-09-15

Applicant: KANEKA CORPORATION

Inventor： Toshiaki Ezaki ,  Kazunori Saegusa ,  Keisuke Hatano ,  Keita Hirai ,  Riru Nishikawa

IPC: C08F220/14

CPC classification number: C08F220/14 ,  C08F2800/10 ,  C08F2810/00 ,  B29C71/02

Abstract: An optical member and a method for producing this optical member are provided. The optical member is composed of an injection molded article. The injection molded article includes a glutarimide resin that contains a glutarimide unit having an imidocarbonyl group provided by the imidization of a carbonyl group deriving from (meth)acrylate ester monomer, a repeat unit deriving from (meth)acrylate ester monomer, and a repeat unit deriving from aromatic vinyl monomer. The glutarimide resin has an orientation birefringence of −0.5×10−3 to 0.5×10−3, a photoelastic constant of −3.0×10−12 Pa−1 to 3.0×10−12 Pa−1, and a glass transition temperature of at least 125° C. The average value of the phase difference of the optical member is not more than 20 nm.

公开(公告)号：US20230295362A1

公开(公告)日：2023-09-21

申请号：US18202707

申请日：2023-05-26

Applicant: KANEKA CORPORATION

Inventor： Tomoki Hiiro ,  Riru Nishikawa ,  Keita Hirai ,  Keisuke Hatano

IPC: C08F222/40 ,  C08F220/14 ,  C08F212/08 ,  C08F8/32 ,  C08K5/19 ,  C08J5/18

CPC classification number: C08F222/40 ,  C08F220/14 ,  C08F212/08 ,  C08F8/32 ,  C08K5/19 ,  C08J5/18 ,  C08J2379/08

Abstract: A glutarimide resin contains repeating units represented by formula (1), formula (2), formula (3) and formula (4). R1 and R2 are each independently hydrogen or an alkyl group having 1 to 8 carbon atoms, and R3 and R4 are each independently hydrogen or an alkyl group having 1 to 8 carbon atoms. R5 and R6 are each independently hydrogen or an alkyl group having 1 to 8 carbon atoms, and R7 is an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, or a substituent containing an aromatic ring having 5 to 15 carbon atoms. R8 is hydrogen or an alkyl group having 1 to 8 carbon atoms, and R9 is an aryl group having 6 to 10 carbon atoms.

公开(公告)号：US20230295358A1

公开(公告)日：2023-09-21

申请号：US18324447

申请日：2023-05-26

Applicant: KANEKA CORPORATION

Inventor： Tomoki Hiiro ,  Riru Nishikawa ,  Keita Hirai ,  Keisuke Hatano

IPC: C08F220/14 ,  G02B1/08

CPC classification number: C08F220/14 ,  G02B1/08

Abstract: A glutarimide resin contains repeating units of formula (1), wherein R1 and R2 are each independently hydrogen or an alkyl group having 1 to 8 carbon atoms; repeating units of formula (2), wherein R3 and R4 are each independently hydrogen or an alkyl group having 1 to 8 carbon atoms, and repeating units of formula (3), wherein R5 and R6 are each independently hydrogen or an alkyl group having 1 to 8 carbon atoms, and R7 is an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, or a substituent containing an aromatic ring having 5 to 15 carbon atoms. The glutarimide resin satisfies the following inequality: 3≤M1+M2≤20. M1 is the content (mol %) of the repeating units of the formula (1) and M2 is the content (mol %) of the repeating units of the formula (2).