Curable organopolysiloxane compositions containing titanium esters
AssigneeSWS Silicones Corporation
InventorsJohn C. Getson, Wendell L. Johnson
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Abstract
An organopolysiloxane composition which is stable under anhydrous conditions, but when exposed to atmospheric moisture cures to an elastomeric solid comprising (1) a hydrocarbonoxy terminated linear organopolysiloxane having at least two hydrocarbonoxy groups per molecule, (2) an organosilicon compound or partial hydrolyzates thereof containing at least two hydrocarbonoxy groups and (3) a titanium ester or partial hydrolyzates thereof in which the hydrocarbonoxy groups linked to the organopolysiloxane, organosilicon compound and the titanium ester groups are the same.
Claims20
An organopolysiloxane composition which is stable under anhydrous conditions but when exposed to atmospheric moisture cures to an elastomeric solid at room temperature comprising
- (1) an organopolysiloxane of the formula ##STR6## (2) an organosilicon compound selected from the group consisting of silanes of the formula
- R".sub.n Si(OR').sub.4-n
- and siloxanes of the formula ##STR7## and (3) a titanium compound of the formula
- Ti(OR').sub.4
- and hydrolyzates thereof in which R is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and cyanoalkyl radicals, R' is an aliphatic hydrocarbon radical having up to 10 carbon atoms, R" is selected from the group consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals, a has an average value of from 1.9 to 2.0, b has a value greater than 10, m has a value of at least 1, n has a value of 0, 1 or 2, y has a value of from 0 to 10 and z has a value of 1, 2 or 3, with the proviso that the R' radicals in the siloxane, the organosilicon compound and the titanium compound must be identical.
Dependencies are inferred from the claim text.