Claims
- 1. A stable, moisture curable room temperature vulcanizable organopolysiloxane composition substantially free of organic solvent and scavenger for hydroxy functional material which is capable of substantially maintaining the same tack-free time as when freshly mixed after and extended shelf period at ambient conditions in a moisture-resistant moisture free container, comprising by weight:
- (A) 100 parts of a polydiorganosiloxane having terminal polyalkoxy siloxy units,
- (B) 0.1 to 10 parts of a polyalkoxy silane,
- (C) 0.05 to 5 parts of an amine accelerator selected from the class consisting of primary amines, secondary amines, silyl-substituted alkyl guanidines and alkyl-substituted guanidines,
- (D) up to 700 parts of filler, and
- (E) an effective amount of a tin carboxylate condensation catalyst selected from the class consisting of di-n-butyltindiethylmalonate, di-n-octyltindiethylmalonate, di-n-octyltinsuccinate, di-n-octyltinoxylate, di-n-butyltinhexahydrophthalate, di-n-butyltinglutamate, di-n-butyltin(2-cyanoglutarate), and di-n-pentyltinphthalate.
- 2. A composition in accordance with claim 1, where the carboxylate tin catalyst is di-n-butyltindiethylmalonate.
- 3. A composition in accordance with claim 1, where the tin catalyst is di-n-octyltindiethylmalonate.
- 4. A composition in accordance with claim 1, where the tin catalyst is di-n-octyltinsuccinate.
- 5. A composition in accordance with claim 1, where the tin catalyst is di-n-octyltinoxylate.
- 6. A composition in accordance with claim 1, where the tin catalyst is di-n-butyltinhexahydrophthalate.
- 7. A composition in accordance with claim 1, where the tin catalyst is di-n-butyltinglutamate.
- 8. A composition in accordance with claim 1, where the tin catalyst is di-n-butyltin(2-cyanoglutarate).
- 9. A composition in accordance with claim 1, where the tin catalyst is di-n-pentyltinphthalate.
- 10. A stable, moisture curable room temperature vulcanizable organopolysiloxane composition useful as a construction sealant and caulking compound which is substantially free of organic solvent and scavenger for hydroxy functional material consisting essentially of by weight
- (A) 100 parts of a silanol terminated polydiorganosiloxane,
- (B) 0.1 to 10 parts of a polyalkoxy silane,
- (C) 0.05 to 5 parts of an amine accelerator selected from the class consisting of primary amines, secondary amines, silyl-substituted alkyl guanidines and alkyl-substituted guanidines,
- (D) up to 700 parts of filler, and
- (E) an effective amount of a tin dicarboxylate condensation catalyst selected from the class consisting of di-n-butyltindiethylmalonate, di-n-octyltindiethylmalonate, di-n-octyltinsuccinate, di-n-octyltinoxylate, di-n-butyltinhexahydrophthalate, di-n-butyltinglutamate, di-n-butyltin(2-cyanoglutarate), di-n-pentyltinphthalate, and dimethyltinadipate.
- 11. A composition in accordance with claim 10, where the tin catalyst is di-n-butyltindiethylmalonate.
- 12. A composition in accordance with claim 10, where the tin catalyst is di-n-octyltindiethylmalonate.
- 13. A composition in accordance with claim 10, where the tin catalyst is di-n-octyltinsuccinate.
- 14. A composition in accordance with claim 10, where the tin catalyst is di-n-octyltinoxylate.
- 15. A composition in accordance with claim 10, where the tin catalyst is di-n-butyltinhexahydrophthalate.
- 16. A composition in accordance with claim 10, where the tin catalyst is di-n-butyltinglutamate.
- 17. A composition in accordance with claim 10, where the tin catalyst is di-n-butyltin(2-cyanoglutarate).
- 18. A composition in accordance with claim 10, where the tin catalyst is di-n-pentyltinphthalate.
- 19. A composition in accordance with claim 10, where the tin catalyst is dimethyltinadipate.
- 20. A stable, moisture curable room temperature vulcanizable organopolysiloxane composition substantially free of organic solvent and scavenger for hydroxy functional material which is capable of substantially maintaining the same tack-free time as when freshly mixed after an extended shelf period at ambient conditions in a moisture-resistant moisture free container, comprising by weight:
- (A) 100 parts of a polydiorganosiloxane having terminal polyalkoxy siloxy units,
- (B) 0.1 to 10 parts of a polyalkoxy silane,
- (C) 0.05 to 5 parts of an amine accelerator selected from the class consisting of primary amines secondary amines, silyl-substituted alkyl guanidines and alkyl-substituted guanidines,
- (D) up to 700 parts of filler, and
- (E) an effective amount of a tin dicarboxylate condensation catalyst having the formula
- (R).sub.2 Sn[Y],
- where Y is a dicarboxylate group having the formula, ##STR7## R is selected from C.sub.(1-18) monovalent hydrocarbon radicals and substituted C.sub.(1-18) monovalent hydrocarbon radicals, R.sup.1 is a C.sub.(3-9) dialkyl substituted methylene, and a is a whole number having a value of 0 or 1.
- 21. A stable, moisture curable room temperature vulcanizable organopolysiloxane composition useful as a construction sealant and caulking compound which is substantially free of organic solvent and scavenger for hydroxy functional material consisting essentially of by weight
- (A) 100 parts of a silanol terminated polydiorganosiloxane,
- (B) 0.1 to 10 parts of a polyalkoxy silane,
- (C) 0.05 to 5 parts of an amine accelerator selected from the class consisting of primary amines, secondary amines, silyl-substituted alkyl guanidines and alkyl-substituted guanidines,
- (D) up to 700 parts of filler, and
- (E) an effective amount of a tin dicarboxylate condensation catalyst having the formula
- (R).sub.2 Sn[Y],
- where Y is a dicarboxylate group having the formula, ##STR8## R is selected from C.sub.(1-18) monovalent hydrocarbon radicals and substituted C.sub.(1-18) monovalent hydrocarbon radicals, R.sup.1 is a C.sub.(3-9) dialkyl substituted methylene, and a is a whole number having a value of 0 or 1.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of copending application Ser. No. 788,523, filed Oct. 21, 1985, which is a continuation of application Ser. No. 644,891, filed Aug. 27, 1984, both abandoned, assigned to the same assignee as the present invention and incorporated herein by reference.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3671485 |
Marwitz et al. |
Jun 1972 |
|
4461867 |
Suprenant |
Jul 1984 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
644891 |
Aug 1984 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
788523 |
Oct 1985 |
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