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. 08, 2019
Filed:
Jul. 18, 2018
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Shoji Ichinohe, Annaka, JP;
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
Abstract
One of the purposes of the present invention is to provide a polysiloxane macromonomer which has high hydrophilicity and a narrow molecular weight distribution and is usable as a material for ophthalmic lenses. The present invention provides a both-terminal modified polysiloxane macromonomer represented by the following average structural formula [I']:R′MeSiO(MeSiO)SiMeR′  [I′]wherein R′ represents —CHO(CHO)C(═O)NH(CHO)C(═O)C(Q)═CH, Me is a methyl group, p is an integer of from 40 to 100, q is an integer of from 5 to 10, r is an integer of from 2 to 3 and Q is a methyl group or a hydrogen atom. The both-terminal modified polysiloxane macromonomer according to claim, having a molecular weight distribution, Mw/Mn, of 1.3 or less.