US4489199A
Expired / Lapsed
US
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Room temperature vulcanizable organopolysiloxane compositions
Assignee: General Electric Co
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Filing: 1983-08-08
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Granted: 1984-12-18
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Expires: 2003-08-08
Abstract
Abstract One packages, room temperature vulcanizable organopolysiloxane compositions are provided having aluminum complex as a condensation catalyst. The room temperature vulcanizable organopolysiloxane compositions exhibit improved stability over an extended shelf period and have short tack-free times.
Inventors
- 👤 Jeffrey H. Wengrovius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:39
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0091
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
248 words
A room temperature vulcanizable organopolysiloxane composition comprising on a weight basis (A) 100 parts of a silanol or alkoxy-terminated polydiorganosiloxane (B) 0.1 to 10 parts of polyalkoxy silane (C) 0.3 to 1 part of a curing accelerator selected from the class consisting of amines, silazanes and silyl-substituted guanidines, or mixtures thereof and (D) 0.1 to 10 parts of an aluminum complex curing catalyst whose valence bonds are satisfied by at least one G radical selected from the class consisting of --OR 1 , --OSi(R 1 ) 3 and --SR 1 , R 1 is a monovalent radical selected from C.sub.(1-13) hydrocarbon radicals and substituted hydrocarbon radicals, or a divalent radical of the formula, --D--Z--D--, D is a divalent radical selected from --O--, --N-- and --S-- and mixtures thereof, Z is a divalent radical selected from C.sub.(6-13) arylene and C.sub.(1-8) alkylene, and when D is --O--, Z also can be ##STR12## where b has a value of 0 to 5 inclusive and where the balance of the valence bonds of the aluminum atom of such complex is satisfied by at least one monovalent anion selected from ##STR13## Z 1 is a divalent radical selected from C.sub.(6-13) aromatic hydrocarbon radicals, and substituted C.sub.(6-13) aromatic hydrocarbon radicals, R 2 and R 3 are the same or different monovalent radicals selected from hydrogen, R 1 , --OR 1 , OSi(R 1 ) 3 , acyl and nitrile R 4 is a monovalent radical selected from hydrogen, R 1 and OR 1 .
Claim 2
Dependent Claim
248 words
A room temperature vulcanizable organopolysiloxane composition comprising on a weight basis (A) 100 parts of a silanol or alkoxy-terminated polydiorganosiloxane (B) 0.1 to 10 parts of polyalkoxy silane (C) 0.3 to 1 part of a curing accelerator selected from the class consisting of amines, silazanes and silyl-substituted guanidines, or mixtures thereof and (D) 0.1 to 10 parts of an aluminum complex curing catalyst whose valence bonds are satisfied by at least one G radical selected from the class consisting of --OR 1 , --OSi(R 1 ) 3 and --SR 1 , R 1 is a monovalent radical selected from C.sub.(1-13) hydrocarbon radicals and substituted hydrocarbon radicals, or a divalent radical of the formula, --D--Z--D--, D is a divalent radical selected from --O--, --N-- and --S-- and mixtures thereof, Z is a divalent radical selected from C.sub.(6-13) arylene and C.sub.(1-8) alkylene, and when D is --O--, Z also can be ##STR12## where b has a value of 0 to 5 inclusive and where the balance of the valence bonds of the aluminum atom of such complex is satisfied by at least one monovalent anion selected from ##STR13## Z 1 is a divalent radical selected from C.sub.(6-13) aromatic hydrocarbon radicals, and substituted C.sub.(6-13) aromatic hydrocarbon radicals, R 2 and R 3 are the same or different monovalent radicals selected from hydrogen, R 1 , --OR 1 , OSi(R 1 ) 3 , acyl and nitrile R 4 is a monovalent radical selected from hydrogen, R 1 and OR 1 .
Claim 3
Dependent Claim
25 words
A room temperature vulcanizable organopolysiloxane composition in accordance with claim 1, where there is utilized an alkoxy terminated polydiorganosiloxane instead of the silanol terminated polydiorganosiloxane.
Claim 4
Dependent Claim
14 words
A composition in accordance wiht claim 1, where the aluminum catalyst is aluminum di(isopropoxide)ethylacetoacetonate.
Claim 5
Dependent Claim
32 words
A room temperature vulcanizable organopolysiloxane composition in accordance with claim 1, where there is utilized an alkoxy terminated polydiorganosiloxane instead of the silanol terminated polydiorganosiloxane and aluminum di(isopropoxide)ethylacetoacetonate as the aluminum complex.
Claim 6
Dependent Claim
15 words
A composition in accordance with claim 1, where the aluminum catalyst is aluminum isopropoxide di(ethylacetoacetonate).
Claim 7
Dependent Claim
14 words
A composition in accordance with claim 1, where the aluminum catalyst is aluminum di(methoxide)ethylacetoacetonate.
Claim 8
Dependent Claim
15 words
A composition in accordance with claim 1, where the aluminum catalyst is aluminum methoxide di(ethylacetoacetonate).
Claim 9
Dependent Claim
14 words
A composition in accordance with claim 1, where the aluminum catalyst is aluminum bis(trimethylsiloxide)ethylacetoacetonate.
Claim 10
Dependent Claim
13 words
A composition in accordance with claim 1, where the cross-linking silane is methyltrimethoxysilane.
Claim 11
Dependent Claim
20 words
A composition in accordance with claim 1, where the alkoxy terminated or silanol terminated polydiorganosiloxane is a silanol terminated polydimethylsiloxane.
Claim 12
Dependent Claim
17 words
A composition in accordance with claim 1, where the alkoxy terminated polydiorganosiloxane is a methyldimethoxy terminated polydimethylsiloxane.
Claim 13
Dependent Claim
15 words
A composition in accordance with claim 1, where the amine accelerator is (n-hexyl) 2 NH.
Claim 14
Dependent Claim
15 words
A composition in accordance with claim 1, where the aluminum catalyst is an aluminum tri(ethylacetoacetonate).
Claim 15
Dependent Claim
24 words
A composition in accordance with claim 1, where the aluminum catalyst is a reaction product of an aluminum methoxide chelate complex with a 1,3-polyalkoxydisiloxane.
Claim 16
Dependent Claim
19 words
A composition in accordance with claim 1, where the amine accelerator is (n-C 4 H 9 ) 2 NH.
Claim 17
Independent Claim
205 words
A method for making a room temperature vulcanizable composition which comprises utilizing under substantially anhydrous conditions an effective amount of an aluminum complex with a polydiorganosiloxane terminated with silanol radicals or alkoxy radicals, where the aluminum complex has the formula, (G).sub.a Al(Q).sub.3-a where G is a monovalent radical selected from the class consisting of --OR 1 , --OSi(R 1 ) 3 , --N(R 1 ) 2 and --SR 1 , or a divalent radical of the formula, --D--Z--D-- D is a divalent radical selected from --O--, --N-- and --S-- and mixtures thereof, Z is a divalent radical selected from C.sub.(6-13) arylene and C.sub.(1-8) alkylene, and when D is --O--, Z also can be ##STR14## where b has a value of 0 to 5 inclusive, Q is a monovalent anion selected from ##STR15## Z 1 is a divalent radical selected from C.sub.(6-13) aromatic hydrocarbon radicals, and substituted C.sub.(6-13) aromatic hydrocarbon radicals, R 2 and R 3 are the same or different monovalent radicals selected from hydrogen, R 1 , --OR 1 , OSi(R 1 ) 3 , acyl and nitrile R 4 is a monovalent radical selected from hydrogen, R 1 and OR 1 and a is a whole number equal to 0 to 3 inclusive.
Claim 18
Independent Claim
205 words
A method for making a room temperature vulcanizable composition which comprises utilizing under substantially anhydrous conditions an effective amount of an aluminum complex with a polydiorganosiloxane terminated with silanol radicals or alkoxy radicals, where the aluminum complex has the formula, (G).sub.a Al(Q).sub.3-a where G is a monovalent radical selected from the class consisting of --OR 1 , --OSi(R 1 ) 3 , --N(R 1 ) 2 and --SR 1 , or a divalent radical of the formula, --D--Z--D-- D is a divalent radical selected from --O--, --N-- and --S-- and mixtures thereof, Z is a divalent radical selected from C.sub.(6-13) arylene and C.sub.(1-8) alkylene, and when D is --O--, Z also can be ##STR14## where b has a value of 0 to 5 inclusive, Q is a monovalent anion selected from ##STR15## Z 1 is a divalent radical selected from C.sub.(6-13) aromatic hydrocarbon radicals, and substituted C.sub.(6-13) aromatic hydrocarbon radicals, R 2 and R 3 are the same or different monovalent radicals selected from hydrogen, R 1 , --OR 1 , OSi(R 1 ) 3 , acyl and nitrile R 4 is a monovalent radical selected from hydrogen, R 1 and OR 1 and a is a whole number equal to 0 to 3 inclusive.
Claim 19
Independent Claim
288 words
A method for making a substantially acid free, one-package, moisture curable organopolysiloxane RTV composition exhibiting an enhanced cure rate which is substantially maintained after a six month period or more at ambient temperatures while excluded from atmospheric moisture which comprises utilizing in combination with 100 parts by weight of a polyalkoxy terminated or silanol-terminated polydiorganosiloxane from 0.1 to 10 parts of an aluminum complex curing catalyst and 0.3 to 1 part of a curing accelerator selected from the class consisting of amines, silazanes, silyl-substituted guanidines, or mixtures thereof, 0 to 10 parts of polyalkoxy silane where the valence bonds of the aluminum in the aluminum complex are satisfied by at least one G radical selected from the class consisting of --OR 1 , --OSi(R 1 ) 3 and --SR 1 , R 1 is a monovalent radical selected from C.sub.(1-13) hydrocarbon radicals and substituted hydrocarbon radicals, or a divalent radical of the formula, --D--Z--D--, D is a divalent radical selected from --O--, --N-- and --S-- and mixtures thereof, Z is a divalent radical selected from C.sub.(6-13) arylene and C.sub.(1-8) alkylene, and when D is --O--, Z also can be. ##STR16## where b has a value of 0 to 5 inclusive and where the balance of the valence bonds of the aluminum atom of such complex is satisfied by at least one monovalent anion selected from ##STR17## Z 1 is a divalent radical selected from C.sub.(6-13) aromatic hydrocarbon radicals, and substituted C.sub.(6-13) aromatic hydrocarbon radicals, R 2 and R 3 are the same or different monovalent radicals selected from hydrogen, R 1 , --OR 1 , OSi(R 1 ) 3 , acyl and nitrile R 4 is a monovalent radical selected from hydrogen, R 1 and OR 1 .
Claim 20
Independent Claim
288 words
A method for making a substantially acid free, one-package, moisture curable organopolysiloxane RTV composition exhibiting an enhanced cure rate which is substantially maintained after a six month period or more at ambient temperatures while excluded from atmospheric moisture which comprises utilizing in combination with 100 parts by weight of a polyalkoxy terminated or silanol-terminated polydiorganosiloxane from 0.1 to 10 parts of an aluminum complex curing catalyst and 0.3 to 1 part of a curing accelerator selected from the class consisting of amines, silazanes, silyl-substituted guanidines, or mixtures thereof, 0 to 10 parts of polyalkoxy silane where the valence bonds of the aluminum in the aluminum complex are satisfied by at least one G radical selected from the class consisting of --OR 1 , --OSi(R 1 ) 3 and --SR 1 , R 1 is a monovalent radical selected from C.sub.(1-13) hydrocarbon radicals and substituted hydrocarbon radicals, or a divalent radical of the formula, --D--Z--D--, D is a divalent radical selected from --O--, --N-- and --S-- and mixtures thereof, Z is a divalent radical selected from C.sub.(6-13) arylene and C.sub.(1-8) alkylene, and when D is --O--, Z also can be. ##STR16## where b has a value of 0 to 5 inclusive and where the balance of the valence bonds of the aluminum atom of such complex is satisfied by at least one monovalent anion selected from ##STR17## Z 1 is a divalent radical selected from C.sub.(6-13) aromatic hydrocarbon radicals, and substituted C.sub.(6-13) aromatic hydrocarbon radicals, R 2 and R 3 are the same or different monovalent radicals selected from hydrogen, R 1 , --OR 1 , OSi(R 1 ) 3 , acyl and nitrile R 4 is a monovalent radical selected from hydrogen, R 1 and OR 1 .
Claim 21
Dependent Claim
32 words
A method in accordance with claim 17, were there is utilized a silanol terminated polydiorganosiloxane and from 0.1 to 10 parts of a polyalkoxysilane per 100 parts of the silanol terminated polydiorganosiloxane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |