C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/1, 204/91.38
C08F 2/46 (2006.01) A61K 6/10 (2006.01) C08K 5/56 (2006.01) C08L 83/04 (2006.01) C08L 83/07 (2006.01)
Patent
CA 1338813
This invention relates to a hydrosilation process involving the reaction of a compound containing silicon-bonded hydrogen with a compound containing aliphatic unsaturation. This invention provides a process for the addition of compounds containing silicon-bonded hydrogen to compounds containing aliphatic unsaturation and compositions suitable for said process. The process is activated by visible radiation and is conducted in the presence of a platinum complex having one cyclopentadienyl group that is eta-bonded to the platinum atom and three aliphatic groups that are sigma-bonded to the platinum atom and a sensitizer that is capable of absorbing visible light and is capable of transferring energy to said platinum complex such that the hydrosilation reaction is initiated upon exposure to visible light. The invention further relates to polysiloxane compositions, prepared by said process, which compositions are useful for preparing dental impressions, adhesives, release liners, and caulking materials.
608967
Boardman Larry D.
Oxman Joel D.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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