Patent · US Active

Hydrophilic copolymer with pendant thiol groups

US10618986B2 · kind B2 · utility

0Cited by

13References

9Claims

0Family size

Assignee

ALCON INC. · CH

Inventors

Frank Chang · Cumming, US
Troy Vernon Holland · Suwanee, US
Feng Jing · Atlanta, US
Ryan DeSousa · Atlanta, US

Key dates

Filing date	Oct 12, 2017
Grant date	Apr 14, 2020
Priority date	—
Expiry date	Jun 1, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG02C7/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention is related to a class of hydrophilic copolymers comprising loosely dangling thiol-containing pendant groups. The hydrophilic copolymers are highly reactive towards azetidinium groups of an azetidinium-containing polymer upon heating and can find particular use in for producing water-soluble highly-branched hydrophilic polymeric material useful for producing water gradient contact lenses.

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