US3943082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting powder coatings
Assignee: Union Carbide Corp
•
Filing: 1974-12-04
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Granted: 1976-03-09
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Expires: 1994-12-04
Abstract
Abstract Powder coating compositions of copolymers of vinyl chloride and a glycidyl acrylyl compound containing a crosslinker for the oxirane groups of the acrylyl compound and the epoxy resin and a minor amount of a plasticizing epoxy resin have been produced having improved flow properties.
Inventors
- 👤 Oliver Wendell Smith
- 👤 Joseph Victor Koleske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:52
CPC Classifications
B; B29; B29C; B29C37/00; B29C37/0067; C; C09; C09D; C09D127/00; C09D127/02; C09D127/04; C09D127/06; C08; C08L; C08L63/00; Y; Y10; Y10S; Y10S524/00; Y10S524/904; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
168 words
A powder coating composition which comprises a mixture of: A. a vinyl polymer of (a) from 50 to 90 weight per cent of vinyl chloride, (b) from 1 to 25 weight per cent of glycidyl acrylate or methacrylate compound, (c) from 0 to 40 weight per cent of vinyl acetate and (d) from 0 to 40 weight per cent of other ethylenically unsaturated polymerizable monomers having the >C=C< group; said polymer having a number average molecular weight of from 2,500 to 40,000; B. an epoxy resin plasticizer at a concentration of from 1 to 15 weight per cent of said vinyl polymer; said plasticizer selected from the group consisting of bisphenol epoxide resins, cycloaliphatic epoxides and resins thereof, aliphatic diglycidyl ethers and esters and epoxidized fatty oils; and C. a crosslinker for the oxirane moiety in said vinyl polymer and said epoxy resin plasticizer, said crosslinker being present at a concentration of from 0.1 to 1 mole equivalent of reactive group thereof per mole equivalent of oxirane group.
Claim 2
Dependent Claim
168 words
A powder coating composition which comprises a mixture of: A. a vinyl polymer of (a) from 50 to 90 weight per cent of vinyl chloride, (b) from 1 to 25 weight per cent of glycidyl acrylate or methacrylate compound, (c) from 0 to 40 weight per cent of vinyl acetate and (d) from 0 to 40 weight per cent of other ethylenically unsaturated polymerizable monomers having the >C=C< group; said polymer having a number average molecular weight of from 2,500 to 40,000; B. an epoxy resin plasticizer at a concentration of from 1 to 15 weight per cent of said vinyl polymer; said plasticizer selected from the group consisting of bisphenol epoxide resins, cycloaliphatic epoxides and resins thereof, aliphatic diglycidyl ethers and esters and epoxidized fatty oils; and C. a crosslinker for the oxirane moiety in said vinyl polymer and said epoxy resin plasticizer, said crosslinker being present at a concentration of from 0.1 to 1 mole equivalent of reactive group thereof per mole equivalent of oxirane group.
Claim 3
Dependent Claim
33 words
A powder coating composition as claimed in claim 1, wherein said vinyl polymer has a molecular weight of from about 5,000 to about 25,000 and a glass transition temperature of at least 40°C.
Claim 4
Dependent Claim
31 words
A powder coating composition as claimed in claim 1, wherein said epoxy resin plasticizer is present at a concentration of from 2 to 5 weight per cent of said vinyl polymer.
Claim 5
Dependent Claim
34 words
A powder coating composition as claimed in claim 1, wherein said crosslinker is present at a concentration of from 0.2 to 0.6 mole equivalent of reactive group thereof per mole equivalent of oxirane group.
Claim 6
Dependent Claim
20 words
A powder coating composition as claimed in claim 1, wherein said vinyl polymer is a vinyl chloride/vinyl acetate/glycidyl methacrylate terpolymer.
Claim 7
Dependent Claim
18 words
A powder coating composition as claimed in claim 1, wherein said resin plasticizer is diglycidyl ether of bisphenol-A.
Claim 8
Dependent Claim
17 words
A powder coating composition as claimed in claim 1, wherein said resin plasticizer is epoxidized soybean oil.
Claim 9
Dependent Claim
18 words
A powder coating composition as claimed in claim 1, wherein a catalytic amount of catalyst is additionally present.
Claim 10
Dependent Claim
17 words
A powder coating composition as claimed in claim 1, wherein a colorant or pigment is additionally present.
Claim 11
Dependent Claim
17 words
A powder coating composition as claimed in claim 1, wherein a flow control agent is additionally present.
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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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |