C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/24 (2006.01) B01J 38/02 (2006.01) C07F 7/22 (2006.01) C08G 18/48 (2006.01)
Patent
CA 2421138
An improvement in a process wherein an organotin compound is used as a catalyst is disclosed, wherein the improvement comprises: A) employing a latent catalyst that is substantially catalytically ineffective at room temperature, wherein said latent catalyst is selected from the group consisting of unsymmetrically substituted tetrahydrocarbyl tin compounds of the formula: R x R'4-x Sn wherein R' is a hydrocarbyl group that is substantially inert under usual conditions of storage and use, R' is a hydrocarbyl group that is more reactive than R under conditions of use, x is l, 2, or 3; and B) then heating the curable mixture to a temperature in the range of from about 30 up to about 99°C to activate the catalyst.
Gerkin Richard M.
Schumacher Oliver
Crompton Gmbh
Marks & Clerk
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