US4634602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primer composition
Assignee: PPG Industries Inc
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Filing: 1986-01-02
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Granted: 1987-01-06
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Expires: 2006-01-02
Abstract
Abstract Compositions of the invention comprise a radiation sensitive compound having ethylenic unsaturation and at least one moiety selected from the group consisting of a urea moiety, a urethane moiety and mixtures thereof, a radiation insensitive compound having a number average molecular weight of at least about 400 comprising at least about 40 percent, by weight, based on the weight of the radiation insensitive compound, of aromatic ring moieties and having a hydroxyl equivalent weight of between about 200 and 1500 and a crosslinking agent reactive with the hydroxyl groups present in said radiation insensitive compound, said crosslinking agent being selected from the group consisting of an aminoplast resin, a blocked isocyanate and mixtures thereof. The composition is capable of being cured using heat and either ultraviolet light or ionizing radiation. A process for applying and curing the composition of the invention on a substrate is also disclosed.
Inventors
- 👤 Robert J. Sirkoch
- 👤 Kenneth W. Niederst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:45
CPC Classifications
C; C09; C09D; C09D4/00; C09D4/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
135 words
A composition comprising: (a) a radiation sensitive compound having ethylenic unsaturation and at least one moiety selected from the group consisting of a urea moiety, a urethane moiety and mixtures thereof; (b) a radiation insensitive compound having a number average molecular weight of at least about 400, comprising at least about 40 percent, by weight, based on the weight of said radiation insensitive compound, of aromatic ring moieties and having a hydroxyl group equivalent weight of between about 200 and about 1500; and (c) a crosslinking agent reactive with the hydroxyl groups present in said radiation insensitive compound, said crosslinking agent being selected from the group consisting of an aminoplast resin, a blocked isocyanate and mixtures thereof, such that said composition is capable of being cured using heat and either ultraviolet light or ionizing radiation.
Claim 2
Dependent Claim
135 words
A composition comprising: (a) a radiation sensitive compound having ethylenic unsaturation and at least one moiety selected from the group consisting of a urea moiety, a urethane moiety and mixtures thereof; (b) a radiation insensitive compound having a number average molecular weight of at least about 400, comprising at least about 40 percent, by weight, based on the weight of said radiation insensitive compound, of aromatic ring moieties and having a hydroxyl group equivalent weight of between about 200 and about 1500; and (c) a crosslinking agent reactive with the hydroxyl groups present in said radiation insensitive compound, said crosslinking agent being selected from the group consisting of an aminoplast resin, a blocked isocyanate and mixtures thereof, such that said composition is capable of being cured using heat and either ultraviolet light or ionizing radiation.
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein said radiation sensitive compound comprises a urethane moiety.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein said radiation sensitive compound comprises acrylate functionality.
Claim 5
Dependent Claim
14 words
The composition of claim 2 wherein said radiation sensitive compound is a urethane acrylate.
Claim 6
Dependent Claim
12 words
The composition of claim 4 wherein said urethane acrylate is a diacrylate.
Claim 7
Dependent Claim
14 words
The composition of claim 1 wherein said radiation insensitive compound is an epoxy resin.
Claim 8
Dependent Claim
28 words
The composition of claim 1 wherein said crosslinking agent is an aminoplast resin selected from the group consisting of a melamine resin, a benzoguanamine resin and mixtures thereof.
Claim 9
Dependent Claim
30 words
The composition of claim 1 wherein said radiation sensitive compound is present at a level of from about 5 percent to about 50 percent, by weight, based on resin solids.
Claim 10
Dependent Claim
30 words
The composition of claim 1 wherein said radiation insensitive compound is present at a level of from about 15 percent to about 60 percent, by weight, based on resin solid.
Claim 11
Dependent Claim
29 words
The composition of claim 1 wherein said aminoplast resin is present at a level of from about 3 percent to about 10 percent, by weight, based on resin solids.
Claim 12
Dependent Claim
10 words
The composition of claim 1 further comprising a reactive diluent.
Claim 13
Dependent Claim
196 words
A process comprising the steps of: (a) applying to a substrate a composition comprising (i) a radiation sensitive compound having ethylenic unsaturation and at least one moiety selected from the group consisting of a urea moiety, a urethane moiety and mixtures thereof, (ii) a radiation insensitive compound having a number average molecular weight of at least about 400, comprising at least about 40 percent, by weight, based on the weight of said radiation insensitive compound, of aromatic ring moieties and having a hydroxyl group equivalent weight of between about 200 and 1500, and (iii) a crosslinking agent reactive with the hydroxyl groups present in said radiation insensitive compound, said crosslinking agent being selected from the group consisting of an aminoplast resin, a blocked isocyanate and mixtures thereof, such that said composition is capable of being cured using heat and either ionizing radiation or ultraviolet light. (b) partially curing said composition in a first curing step; and (c) further curing said composition in a second curing step; wherein one of said curing steps comprises exposing said coated substrate to either ultraviolet light or ionizing radiation and the other curing step comprises exposing said coated substrate to heat.
Claim 14
Dependent Claim
196 words
A process comprising the steps of: (a) applying to a substrate a composition comprising (i) a radiation sensitive compound having ethylenic unsaturation and at least one moiety selected from the group consisting of a urea moiety, a urethane moiety and mixtures thereof, (ii) a radiation insensitive compound having a number average molecular weight of at least about 400, comprising at least about 40 percent, by weight, based on the weight of said radiation insensitive compound, of aromatic ring moieties and having a hydroxyl group equivalent weight of between about 200 and 1500, and (iii) a crosslinking agent reactive with the hydroxyl groups present in said radiation insensitive compound, said crosslinking agent being selected from the group consisting of an aminoplast resin, a blocked isocyanate and mixtures thereof, such that said composition is capable of being cured using heat and either ionizing radiation or ultraviolet light. (b) partially curing said composition in a first curing step; and (c) further curing said composition in a second curing step; wherein one of said curing steps comprises exposing said coated substrate to either ultraviolet light or ionizing radiation and the other curing step comprises exposing said coated substrate to heat.
Claim 15
Dependent Claim
24 words
The process of claim 12 further comprising the step of applying a topcoat to said coated substrate between said first and second curing steps.
Claim 16
Dependent Claim
22 words
The process of claim 12 wherein said first curing step involves exposing said coated substrate to either ultraviolet light or ionizing radiation.
Claim 17
Dependent Claim
38 words
The process of claim 13 wherein said topcoat is thermally curable, said first curing step involves exposing said coated substrate to either ultraviolet light or ionizing radiation and said second step involves exposing said coated substrate to heat.
Claim 18
Dependent Claim
32 words
The process of claim 12 wherein said composition is applied to said substrate so that it is cured to a dry film thickness of from about 1 mil to about 3 mils.
Claim 19
Dependent Claim
10 words
The process of claim 12 wherein said substrate is metal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |