Patent US3933607A successfully refreshed from Google Patents.
US3933607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitized vapor phase photo-grafting of monomers onto surfaces
Assignee: University of California, San Diego
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Filing: 1973-08-22
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Granted: 1976-01-20
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Expires: 1993-08-22
Abstract
Abstract A process for the vapor phase graft copolymerization of a monomer vapor onto a polymeric substrate in the presence of a source of light at low energy levels and a photosensitive vapor (e.g. a diketone) activated by such low energy. The product of said process.
Inventors
- 👤 Howard L. Needles
- 👤 Rita P. Seiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:53
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/18; C; C08; C08F; C08F283/00; C08F283/04; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
148 words
A vapor phase method for forming a graft copolymer in the presence of low energy irradiation comprising the steps of depositing a wetting agent onto the surface of a polyamide polymeric substrate; and contacting said substrate with an unhalogenated vinyl monomer from a vapor source, said monomer including substituted groups selected from the group consisting of organic acids and their derivatives, organic and inorganic esters and ethers and cyanide in the presence of light energy, the majority of which comprises photons having wavelengths over 3000 S., and contacting said wetted substrate with a volatile photosensitive compound from a vapor source, said photosensitive compound being capable of activation by exposure to said light to a state sufficient to create grafting sites on said polymeric substrate to there by graft polymerize said monomer at said sites, said wetting agent having an affinity for said polymeric substrate, monomer and photosensitive compound.
Claim 2
Dependent Claim
148 words
A vapor phase method for forming a graft copolymer in the presence of low energy irradiation comprising the steps of depositing a wetting agent onto the surface of a polyamide polymeric substrate; and contacting said substrate with an unhalogenated vinyl monomer from a vapor source, said monomer including substituted groups selected from the group consisting of organic acids and their derivatives, organic and inorganic esters and ethers and cyanide in the presence of light energy, the majority of which comprises photons having wavelengths over 3000 S., and contacting said wetted substrate with a volatile photosensitive compound from a vapor source, said photosensitive compound being capable of activation by exposure to said light to a state sufficient to create grafting sites on said polymeric substrate to there by graft polymerize said monomer at said sites, said wetting agent having an affinity for said polymeric substrate, monomer and photosensitive compound.
Claim 3
Dependent Claim
25 words
A method as in claim 1 in which said photosensitive vapor is selected from the group consisting of diketones and α, β unsaturated carbonyl compounds.
Claim 4
Dependent Claim
21 words
A method as in claim 1 in which at least 75% of said light comprises photons having wavelengths over 3000 A.
Claim 5
Dependent Claim
13 words
A method as in claim 1 in which said photosensitive vapor is biacetyl.
Claim 6
Dependent Claim
18 words
A method as in claim 1 in which said polymeric substrate is in the form of a fiber.
Claim 7
Dependent Claim
18 words
A method as in claim 1 in which said polymeric substrate is in the form of a fabric.
Claim 8
Dependent Claim
18 words
A method as in claim 1 in which said polymeric substrate is in the form of a sheet.
Claim 9
Dependent Claim
28 words
A method as in claim 1 in which said monomer is selected from the group consisting of acrylic acid, substituted acrylic acids, acrylates, substituted acrylates, acrylonitrile and acrylamides.
Claim 10
Dependent Claim
16 words
A method as in claim 1 in which said monomer is soluble in said wetting agent.
Claim 11
Dependent Claim
9 words
A product formed by the process of claim 1.
Claim 12
Dependent Claim
9 words
A product formed by the process of claim 8.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |