US3944689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glossy coating compositions from copolymers of vinylidene fluoride
Assignee: PPG Industries Inc
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Filing: 1971-10-22
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Granted: 1976-03-16
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Expires: 1991-10-22
Abstract
Abstract Continuous, glossy coatings are provided by compositions comprising a copolymer of vinylidene fluoride and tetrafluoroethylene or perfluoropropene and an acrylate polymer dispersed in a gloss enhancing solvent comprising 2-nitropropane, cyclohexanone or dimethylacetamide, or a combination of such solvents. The coatings obtained have the outstanding resistance and weatherability properties characteristic of fluoropolymer coatings.
Inventors
- 👤 Glenn W. Luckock
- 👤 William V. Warnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:20
CPC Classifications
C; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/16; C09D133/00; C09D133/04; C09D133/06; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; C08L33/00; C08L33/04; C08L33/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
116 words
A coating composition which dries in air at ambient temperature to form a high gloss, continuous film, comprising: A. from about 20 percent to about 70 percent, based on the total weight of (A) and (B), of a fluorocarbon polymer comprising from about 95 percent to about 60 percent by weight of vinylidene fluoride and from about 5 percent to about 40 percent by weight of tetrafluoroethylene or perfluoropropene; B. from about 30 percent to about 80 percent, based on the total weight of (A) and (B), of an acrylate polymer; wherein Components (A) and (B) are dissolved in gloss-enhancing solvent comprising a member selected from the class consisting of 2-nitropropane, cyclohexanone, dimethylacetamide, and combinations thereof.
Claim 2
Dependent Claim
116 words
A coating composition which dries in air at ambient temperature to form a high gloss, continuous film, comprising: A. from about 20 percent to about 70 percent, based on the total weight of (A) and (B), of a fluorocarbon polymer comprising from about 95 percent to about 60 percent by weight of vinylidene fluoride and from about 5 percent to about 40 percent by weight of tetrafluoroethylene or perfluoropropene; B. from about 30 percent to about 80 percent, based on the total weight of (A) and (B), of an acrylate polymer; wherein Components (A) and (B) are dissolved in gloss-enhancing solvent comprising a member selected from the class consisting of 2-nitropropane, cyclohexanone, dimethylacetamide, and combinations thereof.
Claim 3
Dependent Claim
58 words
The composition of claim 1 in which said gloss-enhancing solvent is a solvent mixture comprising: a. from about 10 percent to about 100 percent by weight, based on solvent, of a solvent blend of 90 parts 2-nitropropane and 10 parts cyclohexanone; and b. from about 0 percent to about 90 percent by weight, based on solvent, of dimethylacetamide.
Claim 4
Dependent Claim
24 words
A composition as in claim 1 wherein components (A) and (B) each comprise about 50 percent of the total weight of (A) and (B).
Claim 5
Dependent Claim
25 words
A composition as in claim 3 wherein said acrylate polymer is comprised of 70 percent by weight of methyl methacrylate and 30 percent ethyl acrylate.
Claim 6
Dependent Claim
18 words
A composition as in claim 3 wherein said acrylate polymer is comprised of methyl methacrylate and aminoethyl methacrylate.
Claim 7
Dependent Claim
23 words
A composition as in claim 1 wherein said gloss-enhancing solvent system is comprised of a 90/10 blend by weight of 2-nitropropane and cyclohexanone.
Claim 8
Dependent Claim
34 words
A composition as in claim 1 wherein said gloss-enhancing solvent system is comprised of a 90/10 blend of 2-nitropropane and cyclohexanone and from about 1 percent to about 25 percent by weight of dimethylacetamide.
Claim 9
Independent Claim
138 words
A method of coating a substrate to form a high gloss, continuous film thereon consisting of: 1. applying to said substrate a composition comprising: A. from about 20 percent to about 70 percent, based on the total weight of (A) and (B), of a fluorocarbon polymer comprising from about 95 percent to about 60 percent by weight of vinylidene fluoride and from about 5 percent to about 40 percent by weight of tetrafluoroethylene or perfluoropropene; B. from about 30 percent to about 80 percent, based on the total weight of (A) and (B), of an acrylate polymer; wherein components (A) and (B) are dissolved in a gloss-enhancing solvent selected from the class consisting of 2-nitropropane, cyclohexanone and dimethylacetamide, and combinations thereof; and 2. drying said composition in air at ambient temperature to form said high gloss, continuous film.
Claim 10
Independent Claim
138 words
A method of coating a substrate to form a high gloss, continuous film thereon consisting of: 1. applying to said substrate a composition comprising: A. from about 20 percent to about 70 percent, based on the total weight of (A) and (B), of a fluorocarbon polymer comprising from about 95 percent to about 60 percent by weight of vinylidene fluoride and from about 5 percent to about 40 percent by weight of tetrafluoroethylene or perfluoropropene; B. from about 30 percent to about 80 percent, based on the total weight of (A) and (B), of an acrylate polymer; wherein components (A) and (B) are dissolved in a gloss-enhancing solvent selected from the class consisting of 2-nitropropane, cyclohexanone and dimethylacetamide, and combinations thereof; and 2. drying said composition in air at ambient temperature to form said high gloss, continuous film.
Claim 11
Dependent Claim
59 words
The method as in claim 8 in which gloss-enhancing solvent system is a solvent mixture comprising: A. from about 10 percent to about 100 percent by weight, based on a solvent, of a solvent blend of 90 parts 2-nitropropane and 10 parts cyclohexanone; and B. from 0 percent to about 90 percent by weight, based on solvent, of dimethylacetamide.
Claim 12
Dependent Claim
24 words
A method as in claim 8 wherein component (A) and (B) each comprises about 50 percent of the total weight of (A) and (B).
Claim 13
Dependent Claim
26 words
A method as in claim 8 wherein said acrylate polymer is comprised of 70 percent by weight methyl methacrylate and 30 percent by weight ethyl acrylate.
Claim 14
Dependent Claim
18 words
A method as in claim 8 wherein said acrylate polymer was comprised of methyl methacrylate and amino-ethyl methacrylate.
Claim 15
Dependent Claim
23 words
A method as in claim 8 wherein said gloss-enhancing solvent system is comprised of a 90/10 blend by weight of 2-nitropropane and cyclohexanone.
Claim 16
Dependent Claim
36 words
A method as in claim 8 wherein said gloss-enhancing system is comprised of a 90/10 blend of 2-nitropropane and cyclohexanone and about 1 percent to about 25 percent by weight based on total solvent, of dimethylacetamide.
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) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |