US4389433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur dioxide cured coatings
Assignee: RCA Corp
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Filing: 1981-05-06
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Granted: 1983-06-21
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Expires: 2001-05-06
Abstract
Abstract An improved method of curing compositions of a monomer containing one or more acrylate moieties coated on a substrate is provided wherein the monomer composition is exposed to sulfur dioxide gas in the presence of a free radical initiator having a hydroperoxide moiety.
Inventors
- 👤 Thomas R. Pampalone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
D; D21; D21H; D21H25/00; D21H25/02; B; B05; B05D; B05D3/00; B05D3/04; B05D3/0433; B05D3/0453; B05D3/046; C; C03; C03C; C03C17/00; C03C17/28; C03C17/32; C09; C09D; C09D4/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
52 words
A method of forming a film on a substrate consisting essentially of applying to the substrate a nonaqueous composition comprising a solution of a free radical initiator having a hydroperoxide moiety in a liquid monomer containing one or more acrylate moieties and curing said composition by exposing same to sulfur dioxide gas.
Claim 2
Independent Claim
52 words
A method of forming a film on a substrate consisting essentially of applying to the substrate a nonaqueous composition comprising a solution of a free radical initiator having a hydroperoxide moiety in a liquid monomer containing one or more acrylate moieties and curing said composition by exposing same to sulfur dioxide gas.
Claim 3
Dependent Claim
23 words
A method according to claim 1, wherein the composition is exposed to sulfur dioxide gas for from about 1 to about 30 seconds.
Claim 4
Dependent Claim
23 words
A method according to claim 1, wherein the composition is exposed to sulfur dioxide gas for from about 2 to about 5 seconds.
Claim 5
Dependent Claim
33 words
A method according to claim 1, wherein the composition contains from about 0.001 part to about 0.2 part by weight of the free radical initiator for each part by weight of the monomer.
Claim 6
Dependent Claim
33 words
A method according to claim 1, wherein the composition contains from about 0.01 part to about 0.06 part by weight of the free radical initiator for each part by weight of the monomer.
Claim 7
Dependent Claim
25 words
A method according to claim 1, wherein the free radical initiator is selected from the group consisting of hydrogen peroxide, t-butylhydroperoxide, cumene hydroperoxide and 2,4-dimethyl-2,4-hexanedihydroperoxide.
Claim 8
Dependent Claim
13 words
A method according to claim 6, wherein the free radical initiator is t-butylhydroperoxide.
Claim 9
Dependent Claim
29 words
A method according to claim 1, wherein the monomer is selected from the group consisting of acrylic acid, methacrylic acid, acrylates and methacrylates containing one or more acrylate moieties.
Claim 10
Dependent Claim
28 words
A method according to claim 8, wherein the monomer is selected from the group consisting of methacrylic acid, hexamethylenediol dimethacrylate, trimethylolpropane trimethacrylate, polypropylene glycol, tetramethacrylate and allyl methacrylate.
Claim 11
Dependent Claim
12 words
A method according to claim 9, wherein the monomer is trimethylolpropane trimethacrylate.
Claim 12
Dependent Claim
19 words
A method according to claim 1, wherein the monomer is trimethylolpropane triacrylate and the free radical initiator is t-butylhydroperoxide.
Claim 13
Dependent Claim
28 words
A method according to claim 1, wherein the monomer is selected from the group consisting of acrylic acid, hexamethylenediol diacrylate, trimethylolpropane triacrylate, polypropylene glycol tetraacrylate and allyl acrylate.
Claim 14
Dependent Claim
12 words
A method according to claim 12, wherein the monomer is allyl acrylate.
Claim 15
Dependent Claim
12 words
A method according to claim 12, wherein the monomer is trimethylolpropane triacrylate.
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) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |