Patent ID: 7067563

Claim:
A foam-generating composition comprising a propellant and a binder that comprises: a graft polymer bearing at least two alkoxysilyl groups of the formula: —Si(R 1 ) m (OR 2 ) 3-m (I) in which R 1 is a linear or branched alkyl group containing 1 to 6 carbon atoms, R 2 is a linear or branched alkyl group containing 1 to 6 carbon atoms and m is an integer of 0 to 2, having graft branches on a graft base, the graft polymer containing at least 0.5% by weight, based on the graft base, of graft branches, wherein the graft polymer is obtained by reaction of a graft base or graft polymer bearing at least two reactive functional groups X with an alkoxysilane compound of the formula: Y—R 3 Si(R 1 ) m (OR 2 ) 3-m (II) in which R 1 , R 2 , and m are as defined in the formula (I), R 3 is a linear or branched alkyl group containing 2 to 24 carbon atoms, an optionally alkyl-substituted cycloalkyl group containing 4 to 24 carbon atoms, an optionally substituted aralkyl group containing 6 to 24 carbon atoms, an alkoxy group containing 2 to 10 carbon atoms, a polyoxyalkylene group containing 4 to 44 carbon atoms or an optionally alkyl-substituted aryl group containing 6 to 24 carbon atoms, and Y is at least one functional group which can react with the functional group X to form a covalent bond or Y and R 3 together represent hydrogen, and wherein the graft polymer comprises at least one polymer selected from the group consisting of polyesters, polyethers, polyether esters, polyamides, polyurethanes, polycarbonates, polyacrylates, polymethacrylates, and polyvinyl esters.