Patent ID: 8524441

Claim:
A polymer comprising a siloxane polymer having at least one Si—OH group and at least one Si—OR group, where R is condensation stabilizing group optionally having a reactive functional group, wherein the siloxane polymer, when placed into propylene glycol monomethyl ether solvent at 20 weight % solid, has a weight average molecular weight increase of less than or equal to 50% after aging for one week at 40° C. as measured by GPC, and wherein the siloxane polymer comprises units of M-type, D-type T-type and Q-type, such that at least one unit of trifunctional silane T-type, and one unit of tetrafunctional silane Q-type, are present, where R a , R b , and R c are selected from the group consisting of hydrocarbon, epoxy-functional, and anhydride-functional groups, and R 10 is selected from the group consisting of alkyl, alkenyl, alkynyl, cycloalkyl, aryl, alkaryl, aralkyl, (alkyl)acrylate, (alkyl)acryloxyalkyl, (alkyl)acryloxyalkenyl, an epoxy-functional group, and an anhydride-functional group; wherein p has a value of 0.5 when the associated oxygen atom is bonded to another silicon atom, and a value of 1 when the associated oxygen atom is bonded to other than a silicon atom, with the proviso that at least one p in each T and Q unit has a value of 0.5; and further where the sum of the number of T and Q units in the siloxane polymer being greater than or equal to 50% of the sum of M, D, T and Q-type units.