Ultraviolet blocking polysiloxane resin and process for...

Details Ultraviolet blocking polysiloxane resin and process for... Ultraviolet blocking polysiloxane resin and process for...

C - Chemistry, Metallurgy

08

L

C08L 83/04 (2006.01) C08J 3/20 (2006.01) C08K 3/36 (2006.01) C08K 5/053 (2006.01) C08K 5/07 (2006.01) C08K 13/02 (2006.01)

Patent

CA 2116097

A polysiloxane resin composition includes a blend of silanols, colloidal silica, an ultraviolet absorbing material, and a dye for correcting the color of a film formed from the resin composition. The silanols include a silanol from the group having the formula R w Si(OH)x or R y Si(OR')z where (w + x) or (y + z) = 4, and R and R' are organic radicals without any crosslinking sites, and a second silanol from the group having the formula R''Si (OR''')3 where R'' is a hydrogen atom or an organic radical and R''' is an organic radical containing a crosslinking site. The resin may be cured at 420°F. The ultraviolet-absorbing material may be a benzophenone, a benzotriazole, or a benzothiazole. A process for forming the resin composition includes reacting the silanols and the ultraviolet absorbing material under continuous agitation for about six hours.

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