Polyfunctional organosiloxanes, compositions containing same, and methods for the preparation thereof

A method for preparing a product comprising:

• 1) combining
• A) a boron containing Lewis acid;
• B) a hydroxyl terminated polydiorganosiloxane of formula
• subscript n is 2 to 2,000, and each R1 is independently selected from the group consisting of monovalent hydrocarbon groups and monovalent halogenated hydrocarbon groups;
• and
• C) a polyorganohydrogensiloxane of formula
• where each subscript d is independently 0 to 995, and each R is an independently selected monovalent hydrocarbon group, thereby preparing the product, where the product comprises a polyfunctional organohydrogensiloxane and a by-product comprising H2.

An adhesive composition comprising:

• A) clustered functional organosiloxane of unit formula:
• where subscript n is 2 to 2,000, each subscript d is independently 0 to 995, subscript o′=0 to 100, subscript n′=(o′+1), each R is an independently selected monovalent hydrocarbon group, each R1 is independently selected from the group consisting of monovalent hydrocarbon groups and monovalent halogenated hydrocarbon groups, and each R8 is a hydrogen atom or a curable group, with the proviso that at least one R8 per molecule is a curable group other than hydrogen;
• B) a reactive resin and polymer,
• C) a condensation reaction catalyst, and
• D) a free radical initiator;
• and
• optionally, an additional starting material selected from the group consisting of E) a dual cure compound, F) an adhesion promoter, G) a corrosion inhibitor, H) a rheology modifier, I) a drying agent, J) a crosslinker, K) a filler, L) a spacer, M) an acid scavenger, N) a silanol functional polydiorganosiloxane, O) a fluorescent optical brightener, P) a chain transfer agent, Q) a (meth)acrylate monomer, R) a poly-alkoxy terminated polydiorganosiloxane, S) a colorant, and two or more of E), F), G), H), I), J), K), L), M), N), O), P), Q), R), and S).