Alkoxysilane functionalized acrylic polymer composition

Details Alkoxysilane functionalized acrylic polymer composition Alkoxysilane functionalized acrylic polymer composition

C - Chemistry, Metallurgy

09

K

C09K 3/10 (2006.01) C08L 43/04 (2006.01) C09J 143/04 (2006.01) C08L 83/04 (2006.01)

Patent

CA 2111415

ABSTRACT A one-part, moisture curable sealant composi- tion which upon exposure to ambient moisture and at ambient temperature will cure to form a crosslinked silicone-acrylic polymer network includes an alkoxy- silane functionalized acrylic polymer, a silanol, and a silane crosslinker. The alkoxy silane functionalized acrylic polymer is the free radical polymerization product of one or more monomers of acrylic or meth- acrylic acid, or alkyl esters thereof, and at least one other vinyl addition monomer either having an alkoxy- silane moiety or having an amino, mercapto, hydroxyl or isocyanato functionality which reacts with a compound having an appropriate reactive functional group and an alkoxysilane moiety. The alkoxysilane functionalized acrylic polymer which is polymerized in a water free environment is mixed with a silanol solution containing hydroxy terminated siloxane polymers and optional polyfunctional silane crosslinkers. The compositions of the invention are useful as caulks, sealants and adhe- sives and can be used on a variety of substrates includ- ing those having glass, metal, ceramic or concrete surfaces.

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