Dow Corning Corporation

Terence J Swihart

John Donald Blizzard

Daniel J Halloran

Kenneth A Kasprzak

Andrew H Ward

Stefano G Savastano

Jeffrey A Kosal

Dipak B Narula

Sunny J Lo

Maris J Ziemelis

Kenneth Christopher Fey

Anh Be

Dennis W Broderick

James E Jones

John G Price

Danielle M Fillmore

Robert D Rivet

Donald F Sprygada

Radar attenuating compositions comprising a low viscosity siloxane polymer, a resinous crosslinker therefor and carbonyl iron powder have improved thermal stability when exposed to temperatures as high as 450.degree. F. The particular crosslinker that is used in the compositions of this invention provides improved stability for the compositions at room temperature storage conditions and also in the cured form. The compositions can be sprayed and/or molded and cured at room temperature and/or elevated temperatures, as desired.

Silicone compositions containing carbonyl iron powder

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 reversing the reaction by applying to hair a composition which includes a vinyl functional silicone, a solvent, and a catalyst. The catalyst is either a carboxylic acid salt of a metal or a metal carbonyl compound. Both cyclic and linear vinyl functional silicones can be employed. Permanent hair waving neutralizer compositions are also described.

Permanent waving with silicones

A method of treating hair in which a formulation is applied to the hair which includes an organosilicon compound. The improvement resides in incorporating into the formulation as the organosilicon compound an amine carboxylate zwitterionomeric polysiloxane having the formula ##STR1## Q in the formula is preferably an organofunctional group represented by ##STR2## in which R' is an alkylene radical of from one to twelve carbon atoms; and R' is ethylene, vinylidene or phenylene.

Hair treatment with zwitterionomeric siloxanes

The invention relates to a method of contacting two components to form a pressure-sensitive adhesive (PSA) construction, wherein the first component comprises a conventional PSA and an aminoxysilicon compound and a second component comprises the same PSA and an amidosilicon compound. The method provides improved adhesive bond strength over an unmodified PSA construction.

Pressure-sensitive composition containing an aminoxysilicon compound

The invention relates to a method of contacting two components to form a pressure-sensitive adhesive (PSA) construction, wherein the first component comprises a conventional PSA and an aminoxysilicon compound and the second component comprises the same PSA and an amidosilicon compound. The method provides improved adhesive bond strength over an unmodified PSA construction.

Method for forming a crosslinkable pressure-sensitive adhesive

The invention relates to a method of contacting two components to form a pressure-sensitive adhesive (PSA) construction, wherein the first component comprises a conventional PSA and a hydroxy-functional diorganopolysiloxane and the second component comprises the same PSA and an acyloxysilane. The method provides improved adhesive bond strength over an unmodified PSA construction.

Silicone primer compositions comprising the reaction product of a resinous copolymeric siloxane and an organosilane are disclosed. The compositions find particular utility in promoting the adhesion of curable silicone coating compositions, comprising a liquid copolymeric organopolysiloxane and a polydiorganosiloxane, to solid substrates. Priming metal substrates with the certain compositions of the present invention additionally imparts improved corrosion resistance thereto when the substrates are subsequently coated with the above mentioned silicone coating compositions.

Silicone primer compositions

The invention relates to a method of contacting two components to form a pressure-sensitive adhesive (PSA) construction, wherein the first component comprises a conventional PSA and a liquid copolymeric organopolysiloxane and the second component comprises the PSA and a cure agent for the liquid copolymeric organopolysiloxane. The method provides improved adhesion over the unmodified PSA as measured by bond strength and/or the percentage of cohesive failure of the construction, which bond strength generally increases with the passage of time.

Crosslinkable pressure-sensitive adhesives containing a liquid

A polish formulation containing as components at least one member selected from the group consisting of waxes, solvents, surfactants, thickening agents, abrasives, dyes, odorants, and other ingredients normally used in making polishes, and as an improvement incorporating a composition which is the reaction product of an acid anhydride and an aminofunctional siloxane. The resulting zwitterionic aminofunctional siloxane can, if desired, be further reacted with a strong acid to provide an equilibrium of the zwitterion and a conjugate acid base pair of the zwitterion and the acid. The invention also includes a method of sheeting water on a surface with the polish, a method of making an aminofunctional siloxane zwitterionomer, and an aminofunctional zwitterionomeric siloxane compound which is the reaction product.

Water sheeting zwitterionomeric aminofunctional siloxanes

An oxygen bleach composition which includes a peroxy bleach component selected from the group consisting of perborates, persulfates, persilicates, perphosphates, and percarbonates, and an organic oxygen bleach activator component capable of reacting with the peroxy bleach component to produce an active peroxy acid, the activator being selected from the group consisting of acetamide functional organosilicon compounds and succinimide functional organosilicon compounds.

Organosilicon oxygen bleach activators

A polish formulation containing as components at least one member selected from the group consisting of waxes, solvents, surfactants, thickening agents, abrasives, dyes, odorants, and other ingredients normally used in making polishes, and as an improvement incorporating a composition which is the reaction product of an acid anhydride and an aminofunction siloxane. The resulting zwitterionic aminofunctional siloxane can, if desired, be further reacted with a strong acid to provide an equilibrium of the zwitterion and a conjugate acid base pair of the zwitterion and the acid. The invention also includes a method of sheeting water on a surface with the polish, a method of making an aminofunctional siloxane zwitterionomer, and an aminofunctional zwitterionomeric siloxane compound which is the reaction product.

Solventless liquid silicone resin compositions are prepared by first reacting a mixture of (A) a polydimethylsiloxane and (B) a methyltrialkoxysilane in the presence of (C) an equilibrating amount of a perfluoroalkane sulfonic acid; hydrolyzing the reaction product formed with sufficient water to provide from about 0.48 to about 0.81 mole of residual alkoxy functionality per 100 parts by weight of said liquid silicone resin; and neutralizing the acid catalyst. Alternatively, the above components can be similtaneously reacted and then neutralized to form the resins of the present invention. The liquid silicone resins are storage stable, have low viscosities and can be cured to form heat-resistant protective coatings on substrates.

Liquid silicone resin compositions

There are disclosed solventless silicone coating compositions comprising a homogeneous mixture of (A) a liquid silicone resin reaction product prepared by hydrolyzing an equilibrated mixture of (i) a first silane and (ii) a first diorganopolysiloxane, (B) a second silane and (C) a second diorganopolysiloxane. The compositions find utility as protective coatings, particularly in corrosion resistant high temperature paint applications. Coatings having excellent humidity resistance are formed when the compositions of the present invention are further modified with a minor portion of an amine-functional polydimethylsiloxane.

Solventless silicone coating composition

An oxygen bleach composition which includes a peroxy bleach component selected from the group consisting of perborates, persulfates, persilicates, perphosphates, and percarbonates, and an organic oxygen bleach activator component capable of reacting with the peroxy bleach component to produce an active peroxy acid, the activator being selected from the group consisting of acetamide functional organosilicon compounds and succinimide functional organosilicon compounds. The activator is a compound selected from the group consisting of compounds having the formulas: ##STR1## wherein R=an alkyl group having 1-4 carbon atoms,

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Essexville, MI, United States of America

Terence J Swihart