US4607068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation-curable coatings adapted for magnetic recording structures
Assignee: Stamicarbon BV
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Filing: 1985-06-03
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Granted: 1986-08-19
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Expires: 2005-06-03
Abstract
Abstract Radiation curable coating compositions, and especially electron beam-curable coating compositions, are disclosed in which magnetizable particles are dispersed in a liquid vehicle comprising a polyethylenically unsaturated polyurethane oligomer which includes a polycarbonate diol, and from 5% to 50%, based on the total weight of unsaturated material, of a polyethylenically unsaturated isocyanurate, such as a triacrylate of tris(2-hydroxyethyl) isocyanurate.
Inventors
- 👤 Robert E. Ansel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:56
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; G11B5/7021; C; C08; C08F; C08F299/00; C08F299/02; C08F299/06; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/44; C08G18/67; C08G18/671; C08G18/672; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
38 words
An electron beam-curable coating composition comprising a liquid medium comprising a polyethylenically unsaturated polyurethane oligomer which includes a polycarbonate diol, and from 5% to 50%, based on the total weight of unsaturated material, of a polyethylenically unsaturated isocyanurate.
Claim 2
Dependent Claim
38 words
An electron beam-curable coating composition comprising a liquid medium comprising a polyethylenically unsaturated polyurethane oligomer which includes a polycarbonate diol, and from 5% to 50%, based on the total weight of unsaturated material, of a polyethylenically unsaturated isocyanurate.
Claim 3
Dependent Claim
22 words
A coating composition as recited in claim 1 in which said oligomer includes reactive hydroxyl or carboxyl groups to aid pigment wetting.
Claim 4
Dependent Claim
18 words
A coating composition as recited in claim 1 in which magnetizable pigment is dispersed in said liquid medium.
Claim 5
Dependent Claim
19 words
A coating composition as recited in claim 3 in which said composition includes extraneous agents to aid pigment wetting.
Claim 6
Dependent Claim
81 words
A coating composition as recited in claim 1 in which said polyethylenically unsaturated polyurethane oligomer comprises the reaction product of a polycarbonate diol having the formula: ##STR2## in which R is the residue of an alkylene diol containing 2-12 carbon atoms; y is at least 1, and R and y are selected to provide a molecular weight for the polycarbonate diol of from 300 to 3000, with an organic diisocyanate, an amine or hydroxy-functional extending agent, and monohydric ethylenically unsaturated compound.
Claim 7
Dependent Claim
19 words
A coating composition as recited in claim 5 in which said monohydric ethylenically unsaturated compound is an hydroxy-functional acrylate.
Claim 8
Dependent Claim
29 words
A coating composition as recited in claim 6 in which R and y are selected to provide a molecular weight for the polycarbonate diol of from 600 to 1500.
Claim 9
Dependent Claim
15 words
A coating composition as recited in claim 6 in which said extending agent is glycerin.
Claim 10
Dependent Claim
16 words
A coating composition as recited in claim 6 in which said extending agent is monoethanol amine.
Claim 11
Dependent Claim
17 words
A coating composition as recited in claim 6 in which said extending agent is dimethylol propionic acid.
Claim 12
Dependent Claim
15 words
A coating composition as recited in claim 6 in which said extending agent is N,N-bis(2-hydroxyethyl)glycine.
Claim 13
Dependent Claim
16 words
A coating composition as recited in claim 1 in which said polyurethane oligomer contains urea groups.
Claim 14
Dependent Claim
33 words
A coating composition as recited in claim 1 in which said polyethylenically unsaturated polyurethane oligomer constitutes at least about 30% up to about 95% of the total polymerizable material in said coating composition.
Claim 15
Dependent Claim
46 words
A coating composition as recited in claim 13 in which the proportion of said polyethylenically unsaturated polyurethane oligomer is at least about 50%, and said polyethylenically unsaturated isocyanurate is present in an amount of at least 20%, there being enough liquid present to provide coating viscosity.
Claim 16
Dependent Claim
19 words
A coating composition as recited in claim 14 in which said polyethylenically unsaturated isocyanurate is a derivative of tris(2-hydroxyethyl)isocyanurate.
Claim 17
Dependent Claim
28 words
A coating composition as recited in claim 15 in which said polyethylenically unsaturated isocyanurate is a polyacrylate containing from about 2.0 to about 3.0 acrylate groups per molecule.
Claim 18
Dependent Claim
21 words
A coating composition as recited in claim 16 in which said polyacrylate contains from 2.6 to 3.0 acrylate groups per molecule.
Claim 19
Dependent Claim
18 words
A coating composition as recited in claim 17 in which said polyacrylate is a triacrylate ester of tris(2-hydroxyethyl)isocyanurate.
Claim 20
Dependent Claim
17 words
A coating composition as recited in claim 14 in which said composition is pigmented with magnetizable particles.
Claim 21
Dependent Claim
54 words
A coating composition as recited in claim 19 in which said magnetizable particles are present in an amount of from 50% to 85% by weight based on the total weight of the coating formed by removal of volatiles, and said composition contains from 25% to 50% of total nonvolatile solids, balance volatile organic solvent.
Claim 22
Dependent Claim
82 words
An electron beam-curable coating composition comprising a liquid medium comprising a polyethylenically unsaturated polyurethane oligomer containing urea groups which comprises the reaction product of a polycarbonate diol having the formula: ##STR3## in which R is the residue of an alkylene diol containing 2-12 carbon atoms; y is at least 1, and R and y are selected to provide a molecular weight for the polycarbonate diol of from 300 to 3000, an oxypropylene diamine, an organic diisocyanate, and a monohydric ethylenically unsturated compound.
Claim 23
Dependent Claim
82 words
An electron beam-curable coating composition comprising a liquid medium comprising a polyethylenically unsaturated polyurethane oligomer containing urea groups which comprises the reaction product of a polycarbonate diol having the formula: ##STR3## in which R is the residue of an alkylene diol containing 2-12 carbon atoms; y is at least 1, and R and y are selected to provide a molecular weight for the polycarbonate diol of from 300 to 3000, an oxypropylene diamine, an organic diisocyanate, and a monohydric ethylenically unsturated compound.
Claim 24
Dependent Claim
29 words
A coating composition as recited in claim 21 in which R and y are selected to provide a molecular weight for the polycarbonate diol of from 600 to 1500.
Claim 25
Dependent Claim
17 words
A coating composition as recited in claim 22 in which said composition is pigmented with magnetizable particles.
Claim 26
Dependent Claim
54 words
A coating composition as recited in claim 22 in which said magnetizable particles are present in an amount of from 50% to 85% by weight based on the total weight of the coating formed by removal of volatiles, and said composition contains from 25% to 50% of total nonvolatile solids, balance volatile organic solvent.
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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |