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US 3,979,344 AGranted
Vulcanizable silicon terminated polyurethane polymer composition having improved cure speed
AssigneeInmont Corporation
InventorsEarle Ruskin Bryant, Joseph August Weis
Life of this patent
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Abstract
Room-temperature-curable silicon-terminated organic sealant compositions having improved cure speeds, and metal and glass primer compositions for use therewith. These sealant compositions comprise a blend of a small amount of N-beta-aminoethyl, gamma - aminopropyl trimethoxy silane with an organosilicon-capped, isocyanate-terminated polyurethane polymer. The composition preferably further comprises a moisture-curing catalyst such as dibutyl tin diacetate.
Claims13
A sealant composition comprising a prepolymer which is a blend of:
- a. a silicon terminated vulcanizable polyurethane polymer of the formula ##EQU2## wherein R is a lower alkyl radical of from 1 to 6 carbon atoms;
- wherein R' is a divalent bridging radical selected from the groups consisting of a divalent hydrocarbon radical, a divalent hydrocarbon ether radical and a divalent hydrocarbon amino radical;
- and wherein Z is a member selected from the group consisting of --S and --NR", where R" is H or a lower alkyl radical of from 1 to 6 carbon atoms.
- with
- b. a small amount of N-beta aminoethyl, gamma aminopropyl trimethoxy silane.
2 more elements
The process of preparing a rapidly curing sealant composition comprising mixing:
- a. a silicon terminated vulcanizable polyurethane polymer of the formula ##STR2## wherein R is a lower alkyl radical of from 1 to 6 carbon atoms;
- wherein R' is a divalent bridging radical selected from the groups consisting of a divalent hydrocarbon radical, a divalent hydrocarbon ether radical, and a divalent hydrocarbon amino radical;
- and wherein Z is a member selected from the group consisting of --S and --NR", where R" is H or a lower alkyl radical of from 1 to 6 carbon atoms.
- with
- b. a small amount of N-beta aminoethyl, gamma aminopropyl trimethoxy silane.
2 more elements
Dependencies are inferred from the claim text.