Binding agents and binding agent compositions containing alkoxy silyl groups, methods of production and use

A foam-generating binder composition comprising a propellant and:

• a) a polymer bearing alkoxysilyl groups obtained by
• a1) reaction of a polymer containing at least two reactive functional groups X with an alkoxysilane compound of the formula:
• Y—R3—Si(R1)m(OR2)3-m (II)
• in which R1 is a linear or branched alkyl group containing 1 to 6 carbon atoms, R2 is a linear or branched alkyl group containing 1 to 6 carbon atoms, R3 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, m is an integer of 0 to 2 and Y is at least one functional group which can react with the functional group X to form a covalent bond or Y and R3 together represent hydrogen;
• or by
• a2) radical or ionic polymerization of a mixture of at least two monomers containing at least one olefinically unsaturated double bond, at least one olefinically unsaturated monomer containing at least one alkoxysilyl group of the formula:
• —Si(R1)m(OR2)3-m (I)
• in which R1 is a linear or branched alkyl group containing 1 to 6 carbon atoms, R2 is a linear or branched alkyl group containing 1 to 6 carbon atoms and m is an integer of 0 to 2,
• or a mixture of two or more such polymers, and
• b) at least one other polymer with or without an alkoxysilyl group which has a softening point of 30° C. to 250° C. (as measured by the ring and ball method),
• wherein the polymer bearing alkoxysilyl groups comprises at least one polymer selected from the group consisting of polyesters, polyethers, polyether esters, polyamides, polyurethanes, polycarbonates, polyacrylates, polymathacrylates, and polyvinyl esters.