Room-temperature-curing silicone sealants

Details Room-temperature-curing silicone sealants Room-temperature-curing silicone sealants

C - Chemistry, Metallurgy

09

K

402/30, 400/7218

C09K 3/10 (2006.01) C08L 83/04 (2006.01) C08L 83/14 (2006.01)

Patent

CA 1282896

IMPROVED ROOM-TEMPERATURE CURING SILICONE SEALANTS Abstract This invention is a method of improving the shelf life and oil resistance of silicone elastomeric sealants which are based upon hydroxyl endblocked polydiorgano- siloxanes, alkyltrialkoxysilane, and titanate catalyst. The improvement is accomplished by the addition of from 10 to 100 parts by weight of silethylene ended polymer of the formula Image where each R is an organic radical selected from methyl, ethyl, propyl, phenyl, and trifluoropropyl r each R" is methyl or ethyl, Z is an ethylene radical or combination of ethylene radicals and siloxane radicals, a is 0 or 1, and x is of a value such that the polymer has a viscosity of from 0.05 to 10 Pa.s at 25°C.

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