Dow Corning Corporation

Carol A Hoag

Steven Walter Wilson

Michael A Lutz

Ronald Paul Gee

Carl J Bilgrien

A process for permanent waving of hair by a reaction in which cystine bridges are reduced to cysteine, the hair reshaped, and the reaction reversed. The improvement in the process resides in the step of reducing or reversing the reaction by applying to hair a composition which includes an emulsion polymerized mercapto functional silicone. Permanent hair waving with waving lotions, neutralizing solutions, or both, containing such emulsion polymerized mercapto functional silicones, provide waved hair with improved conditioning benefits.

Permanent waving with mercaptosilicones

The inability of organosiloxane compositions containing an organohydrogensiloxane as the curing agent and a platinum group metal-containing catalyst to cure completely on substrates containing residues of solder fluxes or other cure-inhibiting materials can be remedied by coating at least that portion of the substrate containing the residue with a layer of an organosilicon compound containing at least two silicon-bonded hydrogen atoms per molecule prior to application of the curable organosiloxane composition.

Method for curing organosiloxane compositions in the presence of cure

Curable polyorganosiloxanes prepared using a base-catalyzed equilibration reaction involving at least one organosiloxane are treated with a composition that includes a triorganohalosilane to neutralize the catalyst. The silane can be used alone or in combination with other Lewis acids. Curable compositions containing polyorganosiloxanes prepared using the present method exhibit improved thermal stability relative to compositions containing polyorganosiloxanes prepared using prior art neutralizing agents.

Neutralization of polyorganosiloxanes using triorganosilanes and curable

Catalyst compositions suitable for use in one-part storage stable organosiloxane compositions that cure by a platinum-catalyzed hydrosilation reaction are prepared by blending a liquid complex of a platinum group metal compound and an ethylenically unsaturated organosiloxane compound with an alkylenediamine, and then combining the resultant mixture with an acetylenic alcohol. The catalyst compositions also contain at least one organohydrogensiloxane that is present prior to or during blending of said alkylene diamine with said acetylenic alcohol.

Growing community of inventors

Midland, MI, United States of America

Carol A Hoag