US4281093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst compositions and their use in the preparation of release coatings
Assignee: Imperial Chemical Industries Ltd
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Filing: 1979-12-28
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Granted: 1981-07-28
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Expires: 1999-12-28
Abstract
Abstract A catalyst composition comprising a solution of an organo-metallic complex of platinum or rhodium in a liquid allyl ether which has a b.p. of at least 150° C. at 1 bar and which is free from groups having an adverse effect on the catalytic affect of the complex; polyorganosiloxane coating compositions containing a Si--H polysiloxane and a polysiloxane containing Si--OH, Si-vinyl or Si-allyl groups, an organo-metallic complex of platinum or rhodium and an allyl ether as defined above; and the use of the compositions for preparing release coatings on substrates. In the coating of substrates, especially paper, with release coatings based on heat-curable polysiloxane compositions, organo-metallic complexes of platinum or rhodium can be used as catalysts provided they are dissolved in the composition. The low-boiling solvents hitherto used have disadvantages in causing atmospheric pollution and requiring solvent-recovery plant. The ethers defined can be used in place of the low-boiling solvents to give satisfactory coatings without the mentioned disadvantages.
Inventors
- 👤 William D. Garden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:48
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08K; C08K5/00; C08K5/04; C08K5/06; C08K5/56; C09; C09D; C09D183/00; C09D183/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/16; C08G77/20; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
75 words
A catalyst composition comprising a solution of an organo-metallic complex of platinum or rhodium in a liquid allyl ether compound which, (a) is free from groups having a deleterious effect on the catalytic activity of the organo-metallic complex as a catalyst for the condensation of polysiloxanes containing silicon bonded hydrogen with diorganopolysiloxanes containing silicon-bonded hydroxy or allyl or vinyl groups, and (b) has a boiling point of at least 150° C. at 1 bar pressure.
Claim 2
Dependent Claim
75 words
A catalyst composition comprising a solution of an organo-metallic complex of platinum or rhodium in a liquid allyl ether compound which, (a) is free from groups having a deleterious effect on the catalytic activity of the organo-metallic complex as a catalyst for the condensation of polysiloxanes containing silicon bonded hydrogen with diorganopolysiloxanes containing silicon-bonded hydroxy or allyl or vinyl groups, and (b) has a boiling point of at least 150° C. at 1 bar pressure.
Claim 3
Dependent Claim
29 words
A solution as claimed in claim 1 wherein the liquid allyl ether compound contains only carbon, hydrogen and oxygen atoms, and is free from groups containing labile hydrogen atoms.
Claim 4
Dependent Claim
22 words
A solution as claimed in claim 2 wherein the liquid allyl ether is a diallyl ether of a monoacylated aliphatic trihydroxy compound.
Claim 5
Dependent Claim
123 words
A heat-curable catalyzed polysiloxane coating composition containing at least two liquid organo polysiloxanes, at least one of which contains silicon-bonded hydrogen, and at least one of which contains silicon-bonded hydroxyl, allyl or vinyl groups, together with an organo-metallic complex of platinum or rhodium wherein the improvement comprises having present sufficient of a liquid allyl ether compound to dissolve said organo-metallic complex in the composition, said liquid allyl ether compound being (a) free from groups having a deleterious effect on the catalytic activity of the organo-metallic complex as a catalyst for the condensation of polysiloxanes containing silicon bonded hydrogen with diorganopolysiloxanes containing silicon-bonded hydroxy or allyl or vinyl groups, and (b) has a boiling point of at least 150° C. at 1 bar pressure.
Claim 6
Dependent Claim
123 words
A heat-curable catalyzed polysiloxane coating composition containing at least two liquid organo polysiloxanes, at least one of which contains silicon-bonded hydrogen, and at least one of which contains silicon-bonded hydroxyl, allyl or vinyl groups, together with an organo-metallic complex of platinum or rhodium wherein the improvement comprises having present sufficient of a liquid allyl ether compound to dissolve said organo-metallic complex in the composition, said liquid allyl ether compound being (a) free from groups having a deleterious effect on the catalytic activity of the organo-metallic complex as a catalyst for the condensation of polysiloxanes containing silicon bonded hydrogen with diorganopolysiloxanes containing silicon-bonded hydroxy or allyl or vinyl groups, and (b) has a boiling point of at least 150° C. at 1 bar pressure.
Claim 7
Dependent Claim
147 words
A process for coating a substrate with a release coating by applying to the substrate a heat curable catalyzed polysiloxane coating composition containing at least two liquid organopolysiloxanes, at least one of which contains silicon-bonded hydrogen and at least one of which contains silicon-bonded hydroxyl, allyl or vinyl groups, together with an organo-metallic complex of platinum or rhodium and heating to cure the composition wherein the improvement comprises having present in the composition sufficient of a liquid allyl ether compound to dissolve said organo-metallic complex in the composition, said liquid allyl ether compound being (a) free from groups having a deleterious effect on the catalytic activity of the organo-metallic complex as a catalyst for the condensation of polysiloxanes containing silicon bonded hydrogen with diorganopolysiloxanes containing silicon-bond hydroxy or allyl or vinyl groups, and (b) has a boiling point of at least 150° C. at 1 bar pressure.
Claim 8
Dependent Claim
147 words
A process for coating a substrate with a release coating by applying to the substrate a heat curable catalyzed polysiloxane coating composition containing at least two liquid organopolysiloxanes, at least one of which contains silicon-bonded hydrogen and at least one of which contains silicon-bonded hydroxyl, allyl or vinyl groups, together with an organo-metallic complex of platinum or rhodium and heating to cure the composition wherein the improvement comprises having present in the composition sufficient of a liquid allyl ether compound to dissolve said organo-metallic complex in the composition, said liquid allyl ether compound being (a) free from groups having a deleterious effect on the catalytic activity of the organo-metallic complex as a catalyst for the condensation of polysiloxanes containing silicon bonded hydrogen with diorganopolysiloxanes containing silicon-bond hydroxy or allyl or vinyl groups, and (b) has a boiling point of at least 150° C. at 1 bar pressure.
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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) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |