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:
Jan. 22, 2019
Filed:
Dec. 24, 2014
Applicant:
Kaneka Corporation, Osaka, JP;
Inventors:
Assignee:
KANEKA CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 220/18 (2006.01); C08F 220/14 (2006.01); C08J 5/18 (2006.01); G02B 1/04 (2006.01); C08K 3/013 (2018.01);
U.S. Cl.
CPC ...
C08F 220/18 (2013.01); C08F 220/14 (2013.01); C08J 5/18 (2013.01); C08K 3/013 (2018.01); G02B 1/04 (2013.01); C08F 2220/185 (2013.01); C08J 2333/10 (2013.01); C08J 2333/12 (2013.01);
Abstract
An object of the present invention is to provide an optical thermoplastic resin having excellent transparency and color tone, and also excellent heat stability, as well as being extremely low in both orientation birefringence and photoelastic birefringence; and a formed body made of said resin. This optical thermoplastic resin has a rate of reduction in melt viscosity of less than 20%, an orientation birefringence of −1.7×10to 1.7×10, a photoelastic constant of −2×10to 2×10Pa, and, when formed into a 2 mm-thick formed body, has a haze of 1% or less.