C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/4022, 400/41
C08L 83/00 (2006.01) C08F 2/50 (2006.01) C08G 77/388 (2006.01) C08J 3/28 (2006.01) C08L 83/06 (2006.01) C08L 83/07 (2006.01) C08L 83/08 (2006.01)
Patent
CA 2013012
ULTRAVIOLET CURED GELS WITH CONTROLLED MODULUS AND VISCOSITY ABSTRACT Gels which are useful for coating, encapsulating or potting fragile electronic devices can be made to have specified viscosities in the uncured state and specified hardnesses in the cured state by varying the number of endblocking groups which are acryl functional and the number of endblocking groups which are non-functional. The gel compositions are made from combining a photosensitization system and a blend of 4 to 90 mole percent of an acryl functional polydiorganosiloxane which has acryl functionality on both ends, 9 to 50 mole percent of a polydiorganosiloxane which has an acryl functionality on one end and a non-functional group on the other end and 0 to 65 mole percent of polydiorganosiloxane which has non-functional groups on both ends. The total number of acryl functional ends on the polydiorganosiloxane is from 20 to 95 percent and the total number of non-functional ends on the polydiorgano- siloxane is from 5 to 80 percent.
Dow Corning Corporation
Gowling Lafleur Henderson Llp
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