US4094843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous coating composition and process from a mercaptan containing polymer and a bis-maleimide
Assignee: Lilly Industries Inc
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Filing: 1977-03-28
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Granted: 1978-06-13
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Expires: 1997-03-28
Abstract
Abstract A curable coating composition contains a polymer having pendant mercaptan groups and a bis-maleimide cross-linking agent. The mercaptan groups of the polymer cross-link with the bis-maleimide upon curing to form a fully cured coating. In a preferred embodiment, the coating composition serves as a cathodic electrocoating composition.
Inventors
- 👤 Vincent Daniel McGinniss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:28
CPC Classifications
C; C09; C09D; C09D167/00; C09D167/02; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/83; C08G18/833; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4042; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08G63/6886; C08G75/00; C08G75/02; C08G75/04; C08G75/045; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3445; C08L; C08L63/00; C09D131/00; C09D131/02; C09D5/00; C09D5/44; C09D5/4488; C09D5/4496; Y; Y10; Y10S; Y10S524/00; Y10S524/901; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31721
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
64 words
A coating composition in aqueous dispersion for forming a curable film thereof, comprising: a water-dispersed polymer having at least about 5% by weight pendant mercaptan groups; and at least about 5% by weight of said polymer of bis-maleimide cross-linking agent; said bis-maleimide having alpha-, beta-ethylenic unsaturation for cross-linking said polymer through said mercaptan groups by addition polymerization upon subsequent curing of said curable film.
Claim 2
Dependent Claim
64 words
A coating composition in aqueous dispersion for forming a curable film thereof, comprising: a water-dispersed polymer having at least about 5% by weight pendant mercaptan groups; and at least about 5% by weight of said polymer of bis-maleimide cross-linking agent; said bis-maleimide having alpha-, beta-ethylenic unsaturation for cross-linking said polymer through said mercaptan groups by addition polymerization upon subsequent curing of said curable film.
Claim 3
Dependent Claim
33 words
The coating composition of claim 1 wherein said bis-maleimide is represented by the general structure: ##STR2## where R is alkylene, arylene, alkylene-arylene, or a polymer having a molecular weight up to about 3,000.
Claim 4
Dependent Claim
36 words
The coating composition of claim 1 wherein said polymer is rendered water-dispersible by adding acid and alkyl halide or halogen to said polymer to form sulfonium ion groups from a minor portion of said mercaptan groups.
Claim 5
Dependent Claim
31 words
The coating composition of claim 1 wherein said polymer also has a minor portion of pendant amine groups which are protonated with proton-donating acid for dispersing said polymer in said bath.
Claim 6
Dependent Claim
13 words
The coating composition of claim 1 wherein said curable film is heat curable.
Claim 7
Dependent Claim
14 words
The coating composition of claim 1 wherein said curable film is ionizing radiation curable.
Claim 8
Dependent Claim
81 words
An electrocoating composition dispersed in an aqueous electrocoating bath for electrodeposition onto a cathode substrate disposed within said bath for forming a curable electrodeposited coating on said cathode substrate, comprising: a water-dispersed electrocoating polymer having at least about 5% by weight pendant mercaptan groups; and at least about 5% bis-maleimide cross-linking agent by weight of said polymer, said bis-maleimide having alpha-, beta-ethylenic unsaturation for cross-linking said polymer by addition polymerization with said mercaptan groups upon subsequent curing of said electrodeposited coating.
Claim 9
Dependent Claim
81 words
An electrocoating composition dispersed in an aqueous electrocoating bath for electrodeposition onto a cathode substrate disposed within said bath for forming a curable electrodeposited coating on said cathode substrate, comprising: a water-dispersed electrocoating polymer having at least about 5% by weight pendant mercaptan groups; and at least about 5% bis-maleimide cross-linking agent by weight of said polymer, said bis-maleimide having alpha-, beta-ethylenic unsaturation for cross-linking said polymer by addition polymerization with said mercaptan groups upon subsequent curing of said electrodeposited coating.
Claim 10
Dependent Claim
13 words
The coating composition of claim 1 wherein said polymer is a polyester polymer.
Claim 11
Dependent Claim
13 words
The coating composition of claim 1 wherein said polymer is a polyamide polymer.
Claim 12
Dependent Claim
13 words
The coating composition of claim 1 wherein said polymer is a urethane polymer.
Claim 13
Dependent Claim
13 words
The coating composition of claim 1 wherein said polymer is an epoxy polymer.
Claim 14
Dependent Claim
13 words
The coating composition of claim 1 wherein said polymer is an acrylic copolymer.
References Cited (Backward Citations)
US3738967A
Cited
US3741942A
Cited
US4035272A
Cited
US4025409A
Cited
US4029561A
Cited
US4035273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |