Patent US2423103A successfully refreshed from Google Patents.
US4222835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In depth curing of resins induced by UV radiation
Assignee: Ranbar Electrical Materials Inc
•
Filing: 1978-05-25
•
Granted: 1980-09-16
•
Expires: 1998-05-25
Abstract
Abstract A composition is prepared of a liquid vinyl monomer, a UV-activated photo-initiator, a thermal initiator, and an accelerator. The composition also preferably contains a free-radical scavenger and a vinyl oligomer. Upon exposure to ultraviolet light the photo-initiator initiates polymerization in the surface layer thereby generating sufficient heat to activate the thermal initiator and cause the polymerization to proceed throughout the bulk of the monomer.
Inventors
- 👤 George D. Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C09; C09D; C09D4/00; Y; Y10; Y10S; Y10S522/00; Y10S522/901; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
117 words
A solventless liquid resinous composition curable with ultraviolet light without externally applied heat, comprising: (1) a liquid monomer having the general formula CH 2 ═CHR where R is an electron-withdrawing organic group; (2) about 0.01 to about 4% by weight of a photo-initiator capable of initiating the polymerization of said monomer when exposed to ultraviolet light; (3) about 0.01 to about 4% by weight of a thermal-initiator capable of initiating the polymerization of said monomer when activated by the exothermic heat of polymerization, said thermal-initiator being a different compound than said photo-initiator; and (4) about 0.01 to about 0.5% by weight of an accelerator capable of lowering the temperature at which said thermal-initiator is activated by heat.
Claim 2
Dependent Claim
117 words
A solventless liquid resinous composition curable with ultraviolet light without externally applied heat, comprising: (1) a liquid monomer having the general formula CH 2 ═CHR where R is an electron-withdrawing organic group; (2) about 0.01 to about 4% by weight of a photo-initiator capable of initiating the polymerization of said monomer when exposed to ultraviolet light; (3) about 0.01 to about 4% by weight of a thermal-initiator capable of initiating the polymerization of said monomer when activated by the exothermic heat of polymerization, said thermal-initiator being a different compound than said photo-initiator; and (4) about 0.01 to about 0.5% by weight of an accelerator capable of lowering the temperature at which said thermal-initiator is activated by heat.
Claim 3
Dependent Claim
15 words
A composition according to claim 1 wherein said accelerator is an amine or an amide.
Claim 4
Dependent Claim
12 words
A composition according to claim 2 wherein said accelerator is methyl diethanolamine.
Claim 5
Dependent Claim
12 words
A composition according to claim 1 wherein said monomer is an acrylate.
Claim 6
Dependent Claim
32 words
A composition according to claim 4 wherein said acrylate is selected from the group consisting of tetraethylene glycol diacrylate, 2-hydroxyethyl acrylate, hexanediol diacrylate, trimethylolpropane triacrylate, 2-ethylhexyl acrylate, ethyl methacrylate, and mixtures thereof.
Claim 7
Dependent Claim
28 words
A composition according to claim 1 which includes about 0.01 to about 1% by weight of a free radical scavenger to increase the shelf life of said composition.
Claim 8
Dependent Claim
13 words
A composition according to claim 6 wherein said free radical scavenger is hydroquinone.
Claim 9
Dependent Claim
34 words
A composition according to claim 1 which includes about 20 to about 90% by weight of an oligomer having a molecular weight of up to about 10,000 and having at least one vinyl group.
Claim 10
Dependent Claim
27 words
A composition according to claim 8 wherein said oligomer has acrylic or methacrylic functionality, is soluble in said monomer, and has a molecular weight up to 2000.
Claim 11
Independent Claim
131 words
A method of making a cured vinyl addition polymer without using an external source of heat comprising preparing a composition which comprises: (1) a liquid monomer having the general formula CH 2 ═CHR where R is an electron-withdrawing organic group; (2) about 0.01 to about 4% by weight of a photo-initiator capable of initiating the polymerization of said monomer when exposed to ultraviolet light; (3) about 0.01 to about 4% by weight of a thermal-initiator capable of initiating the polymerization of said monomer when activated by the exothermic heat of polymerization, said thermal-initiator being a different compound than said photo-initiator; (4) about 0.01 to about 0.5% by weight of an accelerator capable of lowering the temperature at which said thermal-initiator is activated by heat; and exposing said composition to ultraviolet light.
Claim 12
Independent Claim
131 words
A method of making a cured vinyl addition polymer without using an external source of heat comprising preparing a composition which comprises: (1) a liquid monomer having the general formula CH 2 ═CHR where R is an electron-withdrawing organic group; (2) about 0.01 to about 4% by weight of a photo-initiator capable of initiating the polymerization of said monomer when exposed to ultraviolet light; (3) about 0.01 to about 4% by weight of a thermal-initiator capable of initiating the polymerization of said monomer when activated by the exothermic heat of polymerization, said thermal-initiator being a different compound than said photo-initiator; (4) about 0.01 to about 0.5% by weight of an accelerator capable of lowering the temperature at which said thermal-initiator is activated by heat; and exposing said composition to ultraviolet light.
Claim 13
Dependent Claim
22 words
A method according to claim 10 wherein a motor stator is coated with said composition prior to said exposure to ultraviolet light.
Claim 14
Dependent Claim
12 words
A cured vinyl addition polymer made by the method of claim 10.
Claim 15
Dependent Claim
10 words
A composition according to claim 1 which includes a pigment.
Claim 16
Dependent Claim
12 words
A method according to claim 10 wherein said composition includes a pigment.
Claim 17
Dependent Claim
12 words
A cured vinyl addition polymer according to claim 12 which is pigmented.
Claim 18
Dependent Claim
15 words
A method according to claim 10 wherein said accelerator is an amine or an amide.
Claim 19
Dependent Claim
12 words
A method according to claim 10 wherein said accelerator is methyl diethanolamine.
Claim 20
Dependent Claim
12 words
A method according to claim 10 wherein said monomer is an acrylate.
Claim 21
Dependent Claim
32 words
A method according to claim 10 wherein said acrylate is selected from the group consisting of tetraethylene glycol diacrylate, 2-hydroxyethyl acrylate, hexanediol diacrylate, trimethylolpropane triacrylate, 2-ethylhexyl acrylate, ethyl methacrylate, and mixtures thereof.
Claim 22
Dependent Claim
28 words
A method according to claim 10 which includes about 0.01 to about 1% by weight of a free radical scavenger to increase the shelf life of said composition.
Claim 23
Dependent Claim
13 words
A method according to claim 10 wherein said free radical scavenger is hydroquinone.
Claim 24
Dependent Claim
34 words
A method according to claim 10 which includes about 20 to about 90% by weight of an oligomer having a molecular weight of up to about 10,000 and having at least one vinyl group.
Claim 25
Dependent Claim
27 words
A method according to claim 10 wherein said oligomer has acrylic or methacrylic functionality, is soluble in said monomer, and has a molecular weight up to 2000.
References Cited (Backward Citations)
US2529315A
Cited
US3876518A
Cited
US3784524A
Cited
US4071424A
Cited
US4071424B1
Cited
US3948740A
Cited
US3937855A
Cited
US4022855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |