C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/5317, 400/72
C08L 83/00 (2006.01) C08G 77/08 (2006.01) C08G 77/10 (2006.01) C08G 77/18 (2006.01) C08L 83/04 (2006.01)
Patent
CA 2011364
Solventless liquid silicone resin compositions are prepared by first reacting a mixture of (A) a polydimethylsiloxane and (B) a methyltrialkoxysilane in the presence of (C) an equilibrating amount of a perfluoroalkane sulfonic acid; hydrolyzing the reaction product formed with sufficient water to provide from about 0.48 to about 0.81 mole of residual alkoxy functionality per 100 parts by weight of said liquid silicone resin; and neutralizing the acid catalyst. Alternatively, the above components can be simultaneously reacted and then neutralized to form the resins of the present invention. The liquid silicone resins are storage stable, have low viscosities and can be cured to form heat-resistant protective coatings on substrates.
Fillmore Danielle M.
Price John G.
Swihart Terence J.
Dow Corning Corporation
Gowling Lafleur Henderson Llp
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