Wacker Silicones Corporation

Sws Silicones Corporation

Roy M Griswold

Eugene R Martin

Douglas G Vanderlaan

Paul A Manis

Walter L Magee

Radiation polymerizable acrylate- or methacrylate-functional organo-polysiloxanes having the structural formula ##STR1## wherein R is a radical selected from the group consisting of monovalent hydrocarbon radicals having from 1 to 20 carbon atoms, substituted monovalent hydrocarbon radicals having from 1 to 20 carbon atoms, monovalent hydrocarbonoxy radicals having from 1 to 20 carbon atoms and a radical of the formula: ##STR2## in which at least one R is a radical of formula (I), R.sup.1 is hydrogen or a methyl radical, R.sup.2 is selected from the group consisting of a multivalent hydrocarbonoxy radical and a multivalent hydrocarbonoxy radical containing non-terminal atoms selected from the group consisting of oxygen, sulphur and nitrogen atoms, R.sup.3 is a divalent hydrocarbon radical or a divalent hydrocarbonoxy radical, a is a number having an average value of from 0.7 to 2.6, b is a number of from 1 to 5, and x is a number from 2 to 1000. The acrylate- or methacrylate-functional organopolysiloxanes are combined with a photosensitizer and/or a peroxide and cured by radiation and/or heat. High energy electrons may be used in lieu of a photosensitizer or peroxide to cure these compositions.

Acrylate- or methacrylate-functional organopolysiloxanes

This invention relates to sulfur containing organopolysiloxane waxes containing

Sulfur-containing organopolysiloxane waxes and a method for preparing

A process for preparing radiation polymerizable acrylate-functional organopolysiloxane-urethane copolymers by reacting aminofunctional polysiloxanes with acrylated urethane oligomers in the presence of a solvent.

Process for preparing acrylate-functional organopolysiloxane-urethane

Radiation polymerizable acrylate-functional organopolysiloxanes having the formula ##STR1## where R is a radical selected from monovalent hydrocarbon radicals, substituted monovalent hydrocarbon radicals having from 1 to 20 carbon atoms or monovalent hydrocarbonoxy radicals having from 1 to 20 carbon atoms, or a radical of the formula ##STR2## in which at least one R is a radical having the above formula, R.sup.1 is a divalent radical selected from a saturated divalent hydrocarbon radical having up to 20 carbon atoms, a divalent hydrocarbonoxy radical in which the oxygen is in the form of an ether linkage and an unsaturated divalent hydrocarbon radical having from 3 to 10 carbon atoms; R.sup.2 is hydrogen or a methyl radical; R.sup.3 is a linear or branched radical having 2, 3, 4, 5 or 6 valences in which the radical is selected from a substituted hydrocarbon radical, or a hydrocarbon ether or thioether radical having one or more repeating units and the terminal atoms of the R.sup.3 radical are selected from oxygen or nitrogen; R.sup.4 is a radical linked to the terminal oxygen or nitrogen atoms of R.sup.3 and is selected from the group consisting of a monovalent hydrocarbon radical having from 1 to 20 carbon atoms, an acryloyl radical, and a substituted acryloyl radical and when the terminal atom of R.sup.3 is oxygen, then R.sup.4 may also be hydrogen. R.sup.5 is a monovalent hydrocarbon radical having from 1 to 20 carbon atoms or a radical of the formula

Acrylate-functional organopolysiloxanes

Compositions which either reduce or prevent foam formation in aqueous or nonaqueous systems comprising (A) a foam destabilizing agent containing (1) a diorganopolysiloxane having the average formula ##STR1## where R is a monovalent hydrocarbon radical having from 1 to 50 carbon atoms, in which an average of at least one R group contains from 6 to 50 carbon atoms, a has an average value of from about 1.8 to 2.2, and m has an average value greater than 3, and (2) an amine containing compound selected from an aminofunctional organopolysiloxane and/or an organic amine having the formula ##STR2## where R.sup.1 is a monovalent hydrocarbon radical having from 1 to 25 carbon atoms, R.sup.2 is a divalent hydrocarbon radical having from 1 to 10 carbon atoms, with the proviso that at least one of the radicals represented by R.sup.1 or R.sup.2 must have at least 6 carbon atoms, b is 0, 1 or 2, c is 0 or 1, (B) a nonaqueous dispersing agent, (C) an inorganic filler and (D) water, if desired.

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Hudson, MI, United States of America

Roy M Griswold