Abstract: Polyorganosiloxanes are prepared from at least one organosiloxane reactant containing an average of more than one silicon-bonded hydroxyl group per molecule using novel catalyst compositions consisting essentially of (1) at least one salt formed from equimolar amounts of an amine and sulfuric acid, phosphoric acid, a carboxylic acid or an organosulfonic acid and (2) an unreacted acid selected from the group consisting of sulfuric acid and fluorinated alkanesulfonic acids.

Abstract: Polyorganosiloxanes are prepared from at least one organosiloxane reactant containing an average of more than one silicon-bonded hydroxyl group per molecule using novel catalyst compositions consisting essentially of (1) at least one salt formed from equimolar amounts of an amine and sulfuric acid, phosphoric acid, a carboxylic acid or an organosulfonic acid and (2) an unreacted acid selected from the group consisting of sulfuric acid and fluorinated alkanesulfonic acids.

Abstract: Reaction products, containing at least one vinyl group, which are obtained by mixing under anhydrous conditions ##EQU1## where u is 0 to 15, v is 0 to 7 and u + v is 1 to 15 and ##EQU2## where m is 0 to 5, and R.sup.1 is methyl, ethyl, or vinyl are adhesion promoters which are useful in primer compositions. The primer compositions are organic solvent solutions with 50 to 99.9 weight percent organic solvent, with the balance being made up of 5 to 100 weight percent of the adhesion promoter, 0 to 50 weight percent of an alkylsilicate and 0 to 50 weight percent of an organotitanate. An example of a primer composition would be a solution of 90.0 weight percent inhibited 1,1,1-trichloroethane with 10.0 weight percent of equal weight amounts of an adhesion promoter where u has an average value of 2, v has an average value 1, and m has an average value of about 0.7, ethylpoly-silicate and bis(acetylacetonyl)diisopropyltitanate.