Patent US4052280A successfully refreshed from Google Patents.
US4052280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uv curing of polymerizable binders
Assignee: SCM Corp
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Filing: 1975-11-06
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Granted: 1977-10-04
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Expires: 1995-11-06
Abstract
Abstract An improved polymer and process for ultraviolet (UV) curing of ethylenically unsaturated polymer binders containing UV sensitizers wherein the improvement comprises incorporating the UV photosensitizer into the polymer backbone. The photosensitizer is spaced in the polymer structure from the ethylenic double bond by the intervening polymer chain. The predetermined spacing of UV sensitizer from the double bond in the polymer provides excellent substrate adhesion as well as improved UV curing.
Inventors
- 👤 Vincent D. McGinnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:18
CPC Classifications
C; C08; C08F; C08F8/00; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31725; Y10T428/31786; Y10T428/31855
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
A protective coating composition for application of a protective coating surface film to a substrate, the coating composition containing an ultraviolet curable polymeric binder of ethylenically unsaturated polymer being reactive to ultraviolet energy and photocurable by free-radical induced addition polymerization of the ethylenic double bonds, the improvement comprising: said ethylenically unsaturated polymer containing at least about 2% of an ultraviolet photosensitizer attached to the polymer structure; and said ultraviolet photosensitizer being connected to the polymer structure in a spaced relationship with said ethylenic unsaturation by an intervening polymer chain having a molecular weight of at least about 100, and said intervening polymer chain having between 2 and 50 repeating polymer units.
Claim 2
Dependent Claim
111 words
A protective coating composition for application of a protective coating surface film to a substrate, the coating composition containing an ultraviolet curable polymeric binder of ethylenically unsaturated polymer being reactive to ultraviolet energy and photocurable by free-radical induced addition polymerization of the ethylenic double bonds, the improvement comprising: said ethylenically unsaturated polymer containing at least about 2% of an ultraviolet photosensitizer attached to the polymer structure; and said ultraviolet photosensitizer being connected to the polymer structure in a spaced relationship with said ethylenic unsaturation by an intervening polymer chain having a molecular weight of at least about 100, and said intervening polymer chain having between 2 and 50 repeating polymer units.
Claim 3
Dependent Claim
57 words
The composition in claim 1 wherein said polymer is a tri-functional branched polymer structure having at least two pendant polymer chains, the first pendant polymer chain having the photosensitizer attached thereto, and the second pendant polymer chain containing the ethylenic unsaturation whereby the tri-functional branching component forms intervening polymer chains between said photosensitizer and said ethylenic unsaturation.
Claim 4
Dependent Claim
63 words
The composition in claim 1 wherein said polymer is a tetra-functional branched polymer structure having at least two pendant polymer chains connected to a tetra-functional branching component, the first pendant polymer chain having the photosensitizer attached thereto, and the second pendant polymer chain containing the ethylenic unsaturation whereby the tetra-functional branching component forms intervening polymer chains between said photosensitizer and said ethylenic unsaturation.
Claim 5
Dependent Claim
31 words
The composition in claim 1 wherein the photosensitizer attached to the polymer is selected from carboxylated phenyl nuclear ketones, aromatic amino carbonyl compounds, halogenated polynuclear ketones, and organic carbonyl photosensitizer compounds.
Claim 6
Dependent Claim
38 words
The composition in claim 1 wherein the intervening polymer chain has a molecular weight between about 300 to 3,000 and is represented by (X) n wherein X is repeating polymer units and n is between 2 and 50.
Claim 7
Dependent Claim
100 words
In a process for ultraviolet curing of protective coating films onto substrates, the protective coating compositions containing ethylenically unsaturated polymers cross-linkable by free-radical induced addition polymerization through said ethylenic double bonds activated by ultraviolet energy and ultraviolet sensitizers, the improvement in the process comprising: step-wise processing of said polymer to produce said ethylenically unsaturated polymer with an ultraviolet photosensitizer attached to the polymer structure and spaced from said ethylenic double bonds by an intervening polymer chain having between about 2 to 50 repeating polymeric units and a molecular weight of at least 100 whereby a random polymer structure is avoided.
Claim 8
Dependent Claim
100 words
In a process for ultraviolet curing of protective coating films onto substrates, the protective coating compositions containing ethylenically unsaturated polymers cross-linkable by free-radical induced addition polymerization through said ethylenic double bonds activated by ultraviolet energy and ultraviolet sensitizers, the improvement in the process comprising: step-wise processing of said polymer to produce said ethylenically unsaturated polymer with an ultraviolet photosensitizer attached to the polymer structure and spaced from said ethylenic double bonds by an intervening polymer chain having between about 2 to 50 repeating polymeric units and a molecular weight of at least 100 whereby a random polymer structure is avoided.
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) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |