US4416974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation curable ceramic pigment composition
Assignee: Hercules LLC
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Filing: 1981-11-05
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Granted: 1983-11-22
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Expires: 2001-11-05
Abstract
Abstract A radiation curable printing medium suitable for screen printing on glass, metal and ceramics which is to be cured and subsequently fired, comprising (a) 4 to 25% by weight of a polymerizable, liquid prepolymer containing at least about two ethylenically unsaturated end groups; (b) 4 to 15% by weight of at least one ethylenically unsaturated polymerizable monomer containing a polar functional group; (c) 60 to 90% by weight of a ceramic frit; and (d) 0.02 to 2% by weight of a polymerization inhibitor.
Inventors
- 👤 Bernard J. Scheve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:18
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/101; B; B41; B41M; B41M1/00; B41M1/26; B41M1/34; B41M7/00; B41M7/0045
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
A radiation curable solvent-free printing medium suitable for screen printing on glass, metal and ceramics, radiation curing and subsequent firing, comprising (a) about 2 to 25% by weight of a polymerizable liquid prepolymer comprising hydroxyl terminated polyester, polyether or polyester-polyether backbones containing at least about two ethylenically unsaturated end groups and having a number average molecular weight of from about 15,000 to about 80,000; (b) about 2 to 15% by weight of at least one ethylenically unsaturated, polymerizable monomer selected from acrylate and methacrylate containing a polar functional group; (c) about 60 to 90% by weight of a ceramic frit; and (d) about 0.02 to 2% by weight of a polymerization inhibitor.
Claim 2
Dependent Claim
112 words
A radiation curable solvent-free printing medium suitable for screen printing on glass, metal and ceramics, radiation curing and subsequent firing, comprising (a) about 2 to 25% by weight of a polymerizable liquid prepolymer comprising hydroxyl terminated polyester, polyether or polyester-polyether backbones containing at least about two ethylenically unsaturated end groups and having a number average molecular weight of from about 15,000 to about 80,000; (b) about 2 to 15% by weight of at least one ethylenically unsaturated, polymerizable monomer selected from acrylate and methacrylate containing a polar functional group; (c) about 60 to 90% by weight of a ceramic frit; and (d) about 0.02 to 2% by weight of a polymerization inhibitor.
Claim 3
Dependent Claim
23 words
A medium according to claim 1 wherein the polymerizable liquid prepolymer having at least about two ethylenically unsaturated end groups is a polyester.
Claim 4
Dependent Claim
23 words
A medium according to claim 1 wherein the polymerizable liquid prepolymer having at least about two ethylenically unsaturated end groups is a polyester-polyether.
Claim 5
Dependent Claim
23 words
A medium according to claim 1 wherein the polymerizable liquid prepolymer having at least about two ethylenically unsaturated end groups is a polyether.
Claim 6
Dependent Claim
12 words
A medium according to claim 2 wherein the polyester is isocyanate modified.
Claim 7
Dependent Claim
12 words
A medium according to claim 3 wherein the polyesterpolyether is isocyanate modified.
Claim 8
Dependent Claim
12 words
A medium according to claim 4 wherein the polyether is isocyanate modified.
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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) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |