Process for making pressure sensitive adhesive hydrogels

Details Process for making pressure sensitive adhesive hydrogels Process for making pressure sensitive adhesive hydrogels

2011-08-16

2011-08-16

Cheung, William K (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S377000, C524S379000, C524S318000, C524S386000, C524S556000

Reexamination Certificate

active

07999023

ABSTRACT:
A process is provided for preparing a pressure sensitive adhesive hydrogel, comprising:(A) providing an oligomeric precursor, the oligomeric precursor comprising a polyether moiety endcapped with ethylenic unsaturation, the oligomeric precursor being associated with methacrylic acid;(B) providing an ethylenically unsaturated crosslinking agent selected from the group consisting of difunctional ethylenically unsaturated monomer, trifunctional ethylenically unsaturated monomer and combinations of the foregoing;(C) free radically curing the oligomeric precursor and the ethylenically unsaturated crosslinking agent in water at a pH between about 3.5 and about 9 to provide the pressure sensitive adhesive hydrogel.

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