MOISTURE CURABLE COMPOSITIONS
First Claim
1. A composition for forming a curable polymer composition comprising:
- (A) a polymer having at least a reactive silyl group;
(B) a crosslinker or chain extender; and
(C) a condensation accelerator comprising a guanidine-containing compound, wherein the guanidine-containing compound comprises a plurality of guanidine functional groups.
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Accused Products
Abstract
The present invention provides curable compositions comprising non-tin metal accelerators that accelerate the condensation curing of moisture-curable silicones/non-silicones. In particular, the present invention provides an accelerator comprising guanidine-containing compounds that are particularly suitable as replacements for organotin in sealant and RTV formulations. Further, the compositions employing a guanidine-containing compound is comparable or superior to organotin such as DBTDL, exhibits certain behavior in the presence of components that allow for tuning or adjusting the cure characteristics of the compositions, and provides good adhesion and storage stability.
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Citations
41 Claims
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1. A composition for forming a curable polymer composition comprising:
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(A) a polymer having at least a reactive silyl group; (B) a crosslinker or chain extender; and (C) a condensation accelerator comprising a guanidine-containing compound, wherein the guanidine-containing compound comprises a plurality of guanidine functional groups. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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- 32. A guanidine-containing compound of the formula:
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35. A method of forming a guanidine-containing compound comprising a plurality of guanidine functional groups comprising:
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reacting an amine-containing compound comprising a plurality of amine groups with a carbodiimide, the carbodiimide being provided in a molar concentration equal to the number of amine groups in the amine-containing compound, wherein the reaction is carried out at a temperature of from about 40°
C. to about 70°
C. and in the absence of a metal catalyst. - View Dependent Claims (36, 37, 38, 39, 40, 41)
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Specification