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US4530989A
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Room temperature stable organopolysiloxane compositions
Assignee: Wacker Chemie AG
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Filing: 1984-03-16
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Granted: 1985-07-23
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Expires: 2004-03-16
Abstract
Abstract Room temperature stable organopolysiloxane compositions containing organosilicon compounds having Si-bonded hydrogen atoms and aliphatic multiple bonds, a platinum catalyst which promotes the addition of Si-bonded hydrogen atoms to the aliphatic multiple bonds and an inhibitior which prevents premature crosslinking at room temperature selected from the group consisting of a maleinimide and a maleic acid derivative of the formula ##STR1## where R 1 is a hydroxyl group or a trimethylsiloxy group and R 2 is a monovalent hydrocarbonoxy radical having from 1 to 20 carbon atoms per radical, which is bonded to the carbon atom of the ##STR2## group or a monovalent hydrocarbonoxy radical having from 1 to 20 carbon atoms per radical, which is bonded to the carbon atom of the ##STR3## group and which is substituted with at least one triorganosilyl group.
Inventors
- 👤 Ulrich Michel
- 👤 Josef Radecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:43
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/44382; C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/11; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415; C08K5/54; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/20; C08G77/22; C08G77/24; C08G77/26; C08G77/70
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
293 words
A crosslinkable organopolysiloxane composition comprising an organosilicon compound having Si-bonded hydrogen atoms, in organosilicon compound having aliphatic multiple bonds, a platinum catalyst capable of promoting the addition of the Si-bonded hydrogen atoms to the aliphatic multiple bonds and an inhibitor which delays or prevents crosslinking at room temperature which is selected from the group consisting of maleinimide and a maleic acid derivative selected from the group consisting of ##STR25## and R 6 (SiR 2 7 O) x (SiR 7 R 6 O) y SiR 2 7 R 6 , where R 1 is selected from the group consisting of a hydroxyl group and a trimethylsiloxy group, R 2 is a radical selected from the group consisting of a hydrocarbonoxy radical which is bonded to the carbon atom of the ##STR26## group and a hydrocarbonoxy radical which is bonded to the carbon atom of the ##STR27## group and is substituted with at least one triorganosilyl group, at least one R 6 is a radical of the formula ##STR28## and the other R 6 radicals are selected from the group consisting of the formula --O(CR.sub.2.sup.4).sub.n OH and R 7 , where R 1 is the same as above, R 4 is selected from the group consisting of hydrogen and an alkyl radical having from 1 to 6 carbon atoms per radical, R 7 is selected from the group consisting of phenyl and alkyl radicals having 2 or 3 carbon atoms per radical and halogenated phenyl and alkyl radicals having 2 or 3 carbon atoms per radical, n is an integer having a value of from 3 to 19, x is 0 or an integer having a value of from 1 to 200 and y is an integer having a value of from 1 to 10.
Claim 2
Dependent Claim
293 words
A crosslinkable organopolysiloxane composition comprising an organosilicon compound having Si-bonded hydrogen atoms, in organosilicon compound having aliphatic multiple bonds, a platinum catalyst capable of promoting the addition of the Si-bonded hydrogen atoms to the aliphatic multiple bonds and an inhibitor which delays or prevents crosslinking at room temperature which is selected from the group consisting of maleinimide and a maleic acid derivative selected from the group consisting of ##STR25## and R 6 (SiR 2 7 O) x (SiR 7 R 6 O) y SiR 2 7 R 6 , where R 1 is selected from the group consisting of a hydroxyl group and a trimethylsiloxy group, R 2 is a radical selected from the group consisting of a hydrocarbonoxy radical which is bonded to the carbon atom of the ##STR26## group and a hydrocarbonoxy radical which is bonded to the carbon atom of the ##STR27## group and is substituted with at least one triorganosilyl group, at least one R 6 is a radical of the formula ##STR28## and the other R 6 radicals are selected from the group consisting of the formula --O(CR.sub.2.sup.4).sub.n OH and R 7 , where R 1 is the same as above, R 4 is selected from the group consisting of hydrogen and an alkyl radical having from 1 to 6 carbon atoms per radical, R 7 is selected from the group consisting of phenyl and alkyl radicals having 2 or 3 carbon atoms per radical and halogenated phenyl and alkyl radicals having 2 or 3 carbon atoms per radical, n is an integer having a value of from 3 to 19, x is 0 or an integer having a value of from 1 to 200 and y is an integer having a value of from 1 to 10.
Claim 3
Dependent Claim
49 words
The composition of claim 1, wherein the maleic acid derivative has the formula ##STR29## where R 1 is selected from the group consisting of a hydroxyl group and a trimethylsiloxy group and R 2 is a hydrocarbonoxy radical which is bonded to the carbon atom of the ##STR30## group.
Claim 4
Dependent Claim
36 words
The composition of claim 1, wherein R 1 is selected from the group consisting of a hydroxyl group and a trimethylsiloxy group and R 2 represents a hydrocarbonoxy radical which is substituted with a triorganosilyl group.
Claim 5
Dependent Claim
68 words
The composition of claim 1, wherein R 2 is a radical of the formula --O(CR.sub.2.sup.4).sub.n SiR.sub.3.sup.5, where R 4 is selected from the group consisting of hydrogen and an alkyl radical having from 1 to 3 carbon atoms per radical, R 5 is an alkyl radical having from 1 to 3 carbon atoms per radical, and n is an integer having a value of from 3 to 19.
Claim 6
Dependent Claim
173 words
The composition of claim 1, wherein the maleic acid derivative has the formula R.sup.6 (SiR.sub.2.sup.7 O).sub.x (SiR.sup.7 R.sup.6 O).sub.y SiR.sup.7 R.sup.6 and at least one of the R 6 radicals has the formula ##STR31## where R 1 is selected from the group consisting of a hydroxyl group and a trimethylsiloxy group, and the other R 6 radicals are selected from the group consisting of a radical of the formula --O(CR.sub.2.sup.4).sub.n OH and R 7 , where R 7 is selected from the group consisting of phenyl and alkyl radicals having 2 or 3 carbon atoms per radical and halogenated phenyl and alkyl radicals having 2 or 3 carbon atoms per radical, R 4 is selected from the group consisting of hydrogen and an alkyl radical having from 1 to 6 carbon atoms per radical, n is an integer having a value of from 3 to 19, x represents 0 or an integer having a value of from 1 to 200 and y is an integer having a value of from 1 to 10.
Claim 7
Dependent Claim
32 words
The composition of claim 1, wherein the maleic acid derivative is present in an amount of from 0.001 to 1 percent by weight, based on the total weight of the organosilicon compounds.
Claim 8
Independent Claim
296 words
A method for inhibiting premature crosslinking of organopolysiloxane compositions at room temperature, which comprises mixing an organosilicon compound having Si-bonded hydrogen atoms with an organosilicon compound containing aliphatic multiple bonds, a platinum catalyst capable of promoting the addition of the Si-bonded hydrogen to the aliphatic multiple bonds and an inhibitor selected from the group consisting of maleinimide and a maleic acid derivative selected from the group consisting of ##STR32## and R 6 (SiR 2 7 O) x (SiR 7 R 6 O) y SiR 2 7 R 6 , where R 1 is selected from the group consisting of a hydroxyl group and a trimethylsiloxy group, R 2 is a radical selected from the group consisting of a hydrocarbonoxy radical which is bonded to the carbon atom of the ##STR33## group and a hydrocarbonoxy radical which is bonded to the carbon atom of the ##STR34## group and is substituted with at least one triorganosilyl group, at least one R 6 is a radical of the formula ##STR35## and the other R 6 radicals are selected from the group consisting of a radical of the formula --O(CR.sub.2.sup.4).sub.n OH and R 7 , where R 1 is the same as above, R 4 is selected from the group consisting of hydrogen and an alkyl radical having from 1 to 6 carbon atoms per radical, R 7 is selected from the group consisting of phenyl and alkyl radicals having 2 or 3 carbon atoms per radical and halogenated phenyl and alkyl radicals having 2 or 3 carbon atoms per radical, n is an integer having a value of from 3 to 19, x is 0 or an integer having a value of from 1 to 200 and y is an integer having a value of from 1 to 10.
Claim 9
Independent Claim
296 words
A method for inhibiting premature crosslinking of organopolysiloxane compositions at room temperature, which comprises mixing an organosilicon compound having Si-bonded hydrogen atoms with an organosilicon compound containing aliphatic multiple bonds, a platinum catalyst capable of promoting the addition of the Si-bonded hydrogen to the aliphatic multiple bonds and an inhibitor selected from the group consisting of maleinimide and a maleic acid derivative selected from the group consisting of ##STR32## and R 6 (SiR 2 7 O) x (SiR 7 R 6 O) y SiR 2 7 R 6 , where R 1 is selected from the group consisting of a hydroxyl group and a trimethylsiloxy group, R 2 is a radical selected from the group consisting of a hydrocarbonoxy radical which is bonded to the carbon atom of the ##STR33## group and a hydrocarbonoxy radical which is bonded to the carbon atom of the ##STR34## group and is substituted with at least one triorganosilyl group, at least one R 6 is a radical of the formula ##STR35## and the other R 6 radicals are selected from the group consisting of a radical of the formula --O(CR.sub.2.sup.4).sub.n OH and R 7 , where R 1 is the same as above, R 4 is selected from the group consisting of hydrogen and an alkyl radical having from 1 to 6 carbon atoms per radical, R 7 is selected from the group consisting of phenyl and alkyl radicals having 2 or 3 carbon atoms per radical and halogenated phenyl and alkyl radicals having 2 or 3 carbon atoms per radical, n is an integer having a value of from 3 to 19, x is 0 or an integer having a value of from 1 to 200 and y is an integer having a value of from 1 to 10.
Claim 10
Dependent Claim
21 words
The method of claim 7, wherein the composition is crosslinked by heating to a temperature of from 60° to 180° C.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |