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:
Sep. 17, 1996
Filed:
Jul. 06, 1995
Tokuyama Corporation, Yamaguchi-ken, JP;
Abstract
A polymerizable composition comprising at least two di(meth)acrylate compounds of the specific general formula (I), e.g., dimethacrylate compounds of polyethylene glycol adduct of 2,2-bis(4-hydroxyphenyl)propane, wherein the content of di(meth)acrylate compound of the general formula (I) in which m+n is 2 to 3 is 30 to 80 mol % and the content of di(meth)acrylate compound of the general formula (I) in which m+n is 6 to 12 is 20 to 50 mol %, and organic glass formed of a polymer from the polymerizable composition, the polymerizable composition being suitable as a transparent resin, particularly as a raw material for an ophthalmic lens which is free of optical strain, has sufficient hardness and is excellent in impact resistance and light resistance.