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:
Oct. 25, 1988
Filed:
May. 06, 1986
Takafumi Uemiya, Osaka, JP;
Yoshitaka Osawa, Osaka, JP;
Shin-ichiro Niwa, Osaka, JP;
Akira Nishimura, Osaka, JP;
Yutaka Shibata, Osaka, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A cross-linked optical siloxane polymer having a group for modifying a refractive index of the polymer which is introduced in a side chain of the polymer by a hydrosilyl reaction of one of the following systems: (1) a compound (A) having a carbon-carbon unsaturated bond and a group for modifying a refractive index, and a siloxane polymer (B) having a silicon hydride group wherein the molar ratio of the silicon hydride group to the carbon-carbon unsaturated bond is more than 1, and (2) a compound (A') having a silicon hydride group and a group for modifying a refractive index, and a siloxane polymer (B') having a carbon-carbon unsaturated bond wherein the molar ratio of the carbon-carbon unsaturated bond to the silicon hydride group is more than 1, the polymer being cross-linked by a hydrosilyl reaction of the unreacted silicon hydride groups of the silixane polymer (B) with a compound (C) having at least two carbon-carbon unsaturated bonds when the system (1) is used, or by a hydrosilyl reaction of the unreacted carbon-carbon unsaturated bonds of the siloxane polymer (B') with a compound (C') having at least two silicon hydride groups when the system (2) is used, the refractive index of which is easily and precisely modified.