The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 2020
Filed:
May. 13, 2016
Applicant:
Kuraray Co., Ltd., Kurashiki-shi, JP;
Inventors:
Toshiaki Sugawara, Tsukuba, JP;
Hiroshi Oshima, Tsukuba, JP;
Assignee:
KURARAY CO., LTD., Kurashiki-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F 297/02 (2006.01); C08L 53/00 (2006.01); G02B 1/04 (2006.01); C08K 5/526 (2006.01); C08L 33/12 (2006.01); C08L 33/02 (2006.01);
U.S. Cl.
CPC ...
C08F 297/02 (2013.01); C08F 297/026 (2013.01); C08K 5/526 (2013.01); C08L 33/02 (2013.01); C08L 33/12 (2013.01); C08L 53/00 (2013.01); G02B 1/04 (2013.01); G02B 1/045 (2013.01);
Abstract
The invention provides an acrylic block copolymer which has excellent transparency, profile extrusion properties and surface smoothness of shaped articles, and which is also excellent in light guiding properties. The acrylic block copolymer includes a polymer block (a1) predominantly containing methacrylic acid ester units and a polymer block (a2) predominantly containing acrylic acid ester units, and has a refractive index of 1.485 to 1.495 and an order-disorder transition temperature (ODTT) of not more than 260° C.