US4544692A
Expired / Lapsed
US
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Polysiloxane and fluorocarbon coating composition
Assignee: Material Sciences Corp
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Filing: 1983-08-29
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Granted: 1985-10-01
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Expires: 2003-08-29
Abstract
Abstract Fast curing resin coating compositions for coating metal surfaces and a one-step method are described. The coatings comprise a high molecular weight epoxy resin, although a portion thereof may be low molecular weight, an effective amount of a cross-linking agent for the epoxy resin, a polysiloxane resin system, an effective amount of a curing agent for the polysiloxane fluid system, a fluorocarbon polymer, and the balance being suitable solvents. The coatings are applied in one-step and dry in less than one minute and may be formed into various shapes and forms useful for stovetop cookware.
Inventors
- 👤 Edmund J. Kuziemka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:17
CPC Classifications
C; C09; C09D; C09D163/00; A; A47; A47J; A47J36/00; A47J36/02; C09D183/00; C09D183/04; Y; Y10; Y10S; Y10S525/00; Y10S525/93
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
144 words
A fast curing resin coating composition consisting essentially of: an epoxy resin having a molecular weight measured by gel permeation chromatography in the range of from about 300 to about 200,000 present in the range of from about 10% by weight to about 20% by weight of said composition, not less than about 85% of said epoxy resin having a molecular weight in the range of from about 50,000 to about 200,000, an effective amount of a cross-linking agent for said epoxy resin, a polysiloxane resin system present in the range of from about 2% by weight to about 7% by weight of said composition, an effective amount of a curing agent for said polysiloxane resin system, a fluorocarbon polymer present in the range of from about 4% by weight to about 15% by weight of said composition, and the balance being suitable solvents.
Claim 2
Dependent Claim
144 words
A fast curing resin coating composition consisting essentially of: an epoxy resin having a molecular weight measured by gel permeation chromatography in the range of from about 300 to about 200,000 present in the range of from about 10% by weight to about 20% by weight of said composition, not less than about 85% of said epoxy resin having a molecular weight in the range of from about 50,000 to about 200,000, an effective amount of a cross-linking agent for said epoxy resin, a polysiloxane resin system present in the range of from about 2% by weight to about 7% by weight of said composition, an effective amount of a curing agent for said polysiloxane resin system, a fluorocarbon polymer present in the range of from about 4% by weight to about 15% by weight of said composition, and the balance being suitable solvents.
Claim 3
Dependent Claim
38 words
The fast curing resin coating composition of claim 1, wherein up to 15% by weight of said epoxy resin has a molecular weight measured by gel permeation chromatography in the range of from about 300 to about 500.
Claim 4
Dependent Claim
18 words
The fast curing resin coating composition of claim 1, wherein said cross linking agent is a melamine resin.
Claim 5
Dependent Claim
20 words
The fast curing resin coating composition of claim 1, wherein said cross linking agent is an etherified resol-type phenolic resin.
Claim 6
Dependent Claim
18 words
The fast curing resin coating composition of claim 1, wherein said cross linking agent is a urea formaldehyde.
Claim 7
Dependent Claim
36 words
The fast curing resin coating composition of claim 1, wherein said cross linking agent is present in the range of from about 2% to about 25% by weight of the solids contents of said epoxy resin.
Claim 8
Dependent Claim
36 words
The fast curing resin coating composition of claim 1, wherein said cross linking agent is present in the range of from about 10% to about 12% by weight of the solids content of said epoxy resin.
Claim 9
Dependent Claim
26 words
The fast curing resin coating composition of claim 1, wherein said polysiloxane resin system includes a fluid composed of a mixture of methylphenylsiloxane, dimethylsiloxane and diphenyldimethylsiloxane.
Claim 10
Dependent Claim
16 words
The fast curing resin coating composition of claim 1, wherein said polysiloxane resin system includes organopolysiloxanes.
Claim 11
Dependent Claim
106 words
The fast curing resin coating composition of claim 1, wherein the polysiloxane resin system includes a precondensate which has one or more of the units ##STR2## wherein X is a functional group which allows cross linking at its site and a, b, c, d, e, are of a magnitude and proportions which provide the resin with a degree of substitution, measured as the ratio of phenyl plus methyl groups to silicon atoms, of at least about one and a ratio of phenyl groups to silicon atoms of at least about 0.3, and which has a silanol content above 4%, based on the weight of the precondensate.
Claim 12
Dependent Claim
23 words
The fast curing resin coating composition of claim 10, wherein the curing agent for said polysiloxane resin system is a multifunctional amine catalyst.
Claim 13
Dependent Claim
29 words
The fast curing resin coating composition of claim 1, wherein said curing agent for said polysiloxane resin system is a tin, zinc or iron salt of an organic acid.
Claim 14
Dependent Claim
19 words
The fast curing resin coating composition of claim 12, wherein said organic acid is an octoate or a naphthenate.
Claim 15
Dependent Claim
21 words
The fast curing resin coating composition of claim 1, wherein the curing agent for said polysiloxane resin system is dibutyltin dilaurate.
Claim 16
Dependent Claim
32 words
The fast curing resin coating composition of claim 1, wherein the composition has a viscosity in the range of from about 115 to about 125 seconds, #4 Ford cup, at 25° C.
Claim 17
Dependent Claim
30 words
The fast curing resin coating composition of claim 1, wherein essentially all of said epoxy resin has a molecular weight in the range of from about 50,000 to about 200,000.
Claim 18
Dependent Claim
25 words
The fast curing resin coating composition of claim 1, wherein said epoxy resin is present in the range of from about 15% to about 20%.
Claim 19
Dependent Claim
18 words
The fast curing resin coating composition of claim 1, wherein said suitable solvents include isophorone and butyl cellosolve.
Claim 20
Dependent Claim
25 words
The fast curing resin coating composition of claim 1, and further including a surface tension modifier to control foaming and surface defects in the coating.
References Cited (Backward Citations)
US3816364A
Cited
US3925276A
Cited
US3786015A
Cited
US3843577A
Cited
US4028339A
Cited
US4121000A
Cited
US4262043A
Cited
US4369268A
Cited
US4369279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |