Loctite Corp., the United States, is patenting a non-ozone depleting, non-inflammable co-solvent composition useful as a carrier for actives such as accelerators, catalysts, initiators, activators and other primer materials for use as adhesive promoter formulations together with adhesive compositions. The co-solvent compositions include an azeotropic solution of a perfluorocarbon and an alkylsiloxane. The perfluorocarbon may be selected from the group consisting of perfluoro-methylmorpholine, perfluoroalkanes having from 5 to 8 carbon atoms, and mixtures thereof. The alkylsiloxane may be selected from the group of compounds having the formula "STR1" where R is an alkyl group having from 1 to 10 carbon atoms and T is an integer from 1 to 5. It has been discovered that the aforementioned alkyl-siloxanes when combined with a perfluorocarbon unexpectedly results in a co-solvent composition which has the desired traits necessary to serve as replacements for CFCs in adhesive promoter compositions.
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