US4472465A
Expired / Lapsed
US
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Siloxane polyester compositions and use thereof
Assignee: Dow Silicones UK Ltd
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Filing: 1983-08-01
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Granted: 1984-09-18
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Expires: 2003-08-01
Abstract
Abstract Siloxane-polyester compositions comprising (1) a siloxane-polyester copolymer resin (2) a silane wherein one of the groups attached to silicon is an organic group containing at least one amino group, the remaining valencies of the silicon being satisfied by alkoxy, alkoxyalkoxy, methyl or phenyl groups there being present at least two alkoxy or alkoxyalkoxy groups, (3) a solvent for the siloxane-polyester copolymer and (4) a titanium chelate. The presence of (2) and (4) improves the rate of cure of the siloxane-polyester, and the compositions are useful for providing decorative and protective coatings on metals, plastics and other substrates.
Inventors
- 👤 Peter M. Burrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:53
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/10; C08; C08G; C08G77/00; C08G77/42; C08G77/445; C08K; C08K5/00; C08K5/0091; C08K5/54; C08K5/544; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
144 words
A composition which comprises (1) a siloxane-polyester copolymer resin having an average of at least two groups per molecule selected from the .tbd.SiOH and .tbd.COH groups (2) a silane of the general formula ##STR2## wherein R represents a hydrogen atom, an alkyl group having from 1 to 4 inclusive carbon atoms or an aliphatic hydrocarbon group attached to the nitrogen atom through a carbon to nitrogen bond and containing at least one amino group, R' represents an alkylene group having 3 or 4 carbon atoms, X represents a methyl or a phenyl group, Y represents an alkyl or an alkyoxyalkyl group having less than 5 carbon atoms and a has a value of 0 or 1, (3) one or more solvents for the siloxane-polyester copolymer and (4) a titanium chelate which is selected from a group consisting essentially of dialkoxytitanium bis-(acetylacetonate) and dialkyoxytitanium bis(ethylacetoacetate).
Claim 2
Dependent Claim
144 words
A composition which comprises (1) a siloxane-polyester copolymer resin having an average of at least two groups per molecule selected from the .tbd.SiOH and .tbd.COH groups (2) a silane of the general formula ##STR2## wherein R represents a hydrogen atom, an alkyl group having from 1 to 4 inclusive carbon atoms or an aliphatic hydrocarbon group attached to the nitrogen atom through a carbon to nitrogen bond and containing at least one amino group, R' represents an alkylene group having 3 or 4 carbon atoms, X represents a methyl or a phenyl group, Y represents an alkyl or an alkyoxyalkyl group having less than 5 carbon atoms and a has a value of 0 or 1, (3) one or more solvents for the siloxane-polyester copolymer and (4) a titanium chelate which is selected from a group consisting essentially of dialkoxytitanium bis-(acetylacetonate) and dialkyoxytitanium bis(ethylacetoacetate).
Claim 3
Dependent Claim
17 words
A composition as claimed in claim 1 wherein the siloxane-polyester has been prepared employing a methylphenyl siloxane.
Claim 4
Dependent Claim
24 words
A composition as claimed in claim 1 wherein the siloxane-polyester copolymer comprises from 35-80% by weight of siloxane and 54-20% by weight of polyester.
Claim 5
Dependent Claim
45 words
A composition as claimed in claim 1 wherein the silane (2) has the general formula H.sub.2 N(CH.sub.2).sub.2 NHR'Si(OY).sub.3 or H.sub.2 NR'Si(OY).sub.3 wherein R' represents --(CH 2 ) 3 -- or --CH 2 .CH 3 CHCH 2 -- and each Y represents methyl, ethyl or methoxyethyl.
Claim 6
Dependent Claim
27 words
A composition as claimed in claim 1 wherein the solvent (3) comprises one or more of lower monohydric alcohols and ethers of ethylene glycols and propylene glycols.
Claim 7
Dependent Claim
37 words
A composition as claimed in claim 1 which contains from 6 to 20% by weight of silane (2) and from 5 to 15% by weight of the titanium chelate (4), based on the weight of the siloxane-polyester.
Claim 8
Dependent Claim
152 words
A process for the preparation of a composition which comprises mixing together (1) a siloxane-polyester copolymer resin having an average of at least two groups per molecule selected from the .tbd.SiOH and .tbd.COH groups (2) a silane of the general formula ##STR3## wherein R represents a hydrogen atom, an alkyl group having from 1 to 4 inclusive carbon atoms or an aliphatic hydrocarbon group attached to the nitrogen atom through a carbon to nitrogen bond and containing at least one amino group, R' represents an alkylene group having 3 or 4 carbon atoms, X represents a methyl or a phenyl group, Y represents an alkyl or an alkoxyalkyl group having less than 5 carbon atoms and a has a value of 0 or 1, (3) one or more solvents for the siloxane-polyester copolymer and (4) a titanium chelate which is selected from a group consisting essentially of dialkoxytitanium bis-(acetylacetonate) and dialkoxytitanium bis(ethylacetoacetate).
Claim 9
Dependent Claim
152 words
A process for the preparation of a composition which comprises mixing together (1) a siloxane-polyester copolymer resin having an average of at least two groups per molecule selected from the .tbd.SiOH and .tbd.COH groups (2) a silane of the general formula ##STR3## wherein R represents a hydrogen atom, an alkyl group having from 1 to 4 inclusive carbon atoms or an aliphatic hydrocarbon group attached to the nitrogen atom through a carbon to nitrogen bond and containing at least one amino group, R' represents an alkylene group having 3 or 4 carbon atoms, X represents a methyl or a phenyl group, Y represents an alkyl or an alkoxyalkyl group having less than 5 carbon atoms and a has a value of 0 or 1, (3) one or more solvents for the siloxane-polyester copolymer and (4) a titanium chelate which is selected from a group consisting essentially of dialkoxytitanium bis-(acetylacetonate) and dialkoxytitanium bis(ethylacetoacetate).
Claim 10
Dependent Claim
23 words
A process for coating a substrate which comprises applying thereto a composition as claimed in claim 1 and thereafter curing the applied composition.
Claim 11
Dependent Claim
12 words
A substrate having a coating of the cured composition of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |