Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Compositions to be polymerized by wave energy wherein said...
Reexamination Certificate
2008-11-20
2011-10-25
Seidleck, James J (Department: 1765)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Compositions to be polymerized by wave energy wherein said...
C522S118000
Reexamination Certificate
active
08044111
ABSTRACT:
The invention provide a new class of silicone-containing prepolymers containing poly(oxyalkylene) blocks, polysiloxane blocks, and actinically-crosslinkable groups which are acryl groups, thiol groups, ene-containing groups or combinations thereof. A prepolymer of the invention is prepared in a one-pot procedure according to the Michael addition of thiol to electron deficient alkenes, such as α,β-unsaturated carbonyl compounds, without need for additional reaction step(s) to introduce actinically crosslinkable groups. The present invention is also related to silicone hydrogel contact lenses made from this class of silicone-containing prepolymers and to methods for making the silicone hydrogel contact lenses.
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Chang Frank
Wang Guigui
Novartis AG
Salamon Peter A
Seidleck James J
Zhou Jian
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