Patent · US Active

Chain-extended polysiloxane crosslinkers with dangling hydrophilic polymer chains

US8835525B2 · kind B2 · utility

59Cited by

187References

10Claims

0Family size

Assignee

Novartis AG · CH

Inventors

Selma Kuyu · Duluth, US
Dawn A. Smith · Rotorua, NZ
Jinyu Huang · Bolingbrook, US
Frank Chang · Cumming, US
Robert Scott · Alpharetta, US
Arturo Norberto Medina · Suwanee, US
Manivakkam J. Shankernarayanan · Alpharetta, US

Key dates

Filing date	Oct 5, 2011
Grant date	Sep 16, 2014
Priority date	—
Expiry date	Aug 2, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG02B2207/109
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention provide a class of linear chain-extended polysiloxane crosslinkers which comprises two terminal ethylenically unsaturated groups, at least two polysiloxane segments, and dangling hydrophilic polymer chains each covalently attached to a divalent organic radical separating each pair of adjacent polysiloxane segments. The present invention is also related to a polymer comprising crosslinking units derived from chain-extended polysiloxane crosslinker of the invention and to ophthalmic lenses comprising such a polymer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.