US4680368A
Expired / Lapsed
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Ultraviolet curable ink composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1986-06-03
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Granted: 1987-07-14
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Expires: 2006-06-03
Abstract
Abstract An ultraviolet curable ink composition comprising, as main components, (A) a polyurethane poly(meth)acrylate obtained by reacting a polyisocyanate compound of the formula: ##STR1## wherein R 1 is a hydrogen atom or a methyl group, and n is an integer of from 1 to 20, with a hydroxyl group-containing (meth)acrylate, and having, in one molecule, at least two (meth)acryloyl groups and at least two urethane bonds, (B) a radical polymerizable low molecular weight compound, and (C) a photopolymerization initiator.
Inventors
- 👤 Hideo Nakamoto
- 👤 Fumito Aosai
- 👤 Hiroshi Fukushima
- 👤 Eriko Suda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:43
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/101; C08; C08F; C08F299/00; C08F299/02; C08F299/06; C08F299/065
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
An ultraviolet curable ink composition comprising, as main components, (A) a polyutethane poly(meth)acrylate obtained by reacting a polyisocyanate compound of the formula: ##STR4## wherein R 1 is a hydrogen atom or a methyl group, and n is an integer of from 1 to 20, with a hydroxyl group-containing (meth)acrylate, and having, in one molecule, at least two (meth)acryloyl groups and at least two urethane bonds, (B) a radical polymerizable low molecular weight compound, and (C) a photopolymerization initiator.
Claim 2
Dependent Claim
78 words
An ultraviolet curable ink composition comprising, as main components, (A) a polyutethane poly(meth)acrylate obtained by reacting a polyisocyanate compound of the formula: ##STR4## wherein R 1 is a hydrogen atom or a methyl group, and n is an integer of from 1 to 20, with a hydroxyl group-containing (meth)acrylate, and having, in one molecule, at least two (meth)acryloyl groups and at least two urethane bonds, (B) a radical polymerizable low molecular weight compound, and (C) a photopolymerization initiator.
Claim 3
Dependent Claim
40 words
The ink composition according to claim 1, which comprises from 10 to 80 parts by weight of component (A), from 20 to 90 parts by weight of component (B), and from 0.1 to 15 parts by weight of component (C).
Claim 4
Dependent Claim
38 words
The ink composition according to claim 1, wherein the molar ratio of the isocyanate groups to the hydroxyl groups in the polyisocyanate compound and the hydroxyl group-containing (meth)acrylate constituting the polyurethane poly(meth)acrylate (A), is from 1:1 to 1:1.2.
Claim 5
Dependent Claim
15 words
The ink composition according to claim 1, wherein the hydroxyl group-containing (meth)acrylate is 2-hydroxyethyl acrylate.
Claim 6
Dependent Claim
28 words
The ink composition according to claim 1, wherein the polyisocyanate compound is a compound of the formula: ##STR5## wherein n' is an integer of from 1 to 5.
Claim 7
Dependent Claim
21 words
The ink composition according to claim 1, wherein the radical polymerizable low molecular weight compound (B) contains a phosphorus-containing vinyl monomer.
Claim 8
Dependent Claim
17 words
The ink composition according to claim 1, wherein the photopolymerization initiator (C) is anthraquinone or its derivative.
Claim 9
Dependent Claim
68 words
The ink composition according to Claim 1, wherein the photopolymerization initiator (C) is a combination of (a) anthraquinone or its derivative, (b) a compound of the formula: ##STR6## wherein each of R 1 and R 2 is a hydrogen atom or an alkyl group, and (c) a compound of the formula: ##STR7## wherein each of R 3 and R 4 is a hydrogen atom or an alkyl group.
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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |