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US3993549A
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Curable solid adducts of polyene-polythiol compositions with urea
Assignee: WR Grace and Co
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Filing: 1974-07-12
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Granted: 1976-11-23
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Expires: 1994-07-12
Abstract
Abstract This invention relates to a solid curable composition formed by adding finely divided urea in amounts ranging from 10 to 70 weight percent of the composition to liquid polyene/polythiol curable systems wherein the combined polyene and polythiol contain at least 20 percent by weight of oxyethylene units. The thus formed solid compositions are readily cured by radiation, e.g., high energy ionizing radiation or U. V. radiation in the presence of a photocuring rate accelerator.
Inventors
- 👤 Richard W. Bush
- 👤 Louis L. Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:52
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/12; C08G75/02; C08G75/04; C08G75/045; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/128; Y10T; Y10T428/00; Y10T428/25; Y10T428/252; Y10T428/31504; Y10T428/31533; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
117 words
A solid radiation curable composition capable of forming, upon curing, a crosslinked, three dimensional network comprising (1) a particulate urea having a mesh size of no greater than 10 microns in an amount ranging from 10-70 weight percent of the composition, and a liquid mixture of (2) a polyene containing at least two unsaturated carbon to carbon bonds per molecule and (3) a polythiol containing at least two thiol groups per molecule, the total combined functionality of the unsaturated carbon to carbon bonds per molecule in the polyene and the thiol groups per molecule in the polythiol being greater than 4, and the combined polyene and polythiol containing at least 20 percent by weight of oxyethylene units.
Claim 2
Dependent Claim
117 words
A solid radiation curable composition capable of forming, upon curing, a crosslinked, three dimensional network comprising (1) a particulate urea having a mesh size of no greater than 10 microns in an amount ranging from 10-70 weight percent of the composition, and a liquid mixture of (2) a polyene containing at least two unsaturated carbon to carbon bonds per molecule and (3) a polythiol containing at least two thiol groups per molecule, the total combined functionality of the unsaturated carbon to carbon bonds per molecule in the polyene and the thiol groups per molecule in the polythiol being greater than 4, and the combined polyene and polythiol containing at least 20 percent by weight of oxyethylene units.
Claim 3
Dependent Claim
27 words
The composition according to claim 1 wherein 0.0005 -50 parts by weight of the polyene and polythiol of a photocuring rate accelerator is added to the composition.
Claim 4
Dependent Claim
5 words
A cured urea complexed polythioether.
Claim 5
Dependent Claim
5 words
A cured urea complexed polythioether.
Claim 6
Dependent Claim
137 words
The process of forming a cured crosslinked, three-dimensional network urea complexed polythioether which comprises admixing (1) a particulate urea having a mesh size of no greater than 10 microns in an amount ranging from 10-70 weight percent of the composition, and a liquid mixture of (2) a polyene containing at least two unsaturated carbon to carbon bonds per molecule and (3) a polythiol containing at least two thiol groups per molecule, the total combined functionality of the unsaturated carbon to carbon bonds per molecule in the polyene and the thiol groups per molecule in the polythiol being greater than 4, and the combined polyene and polythiol containing at least 20 percent by weight of oxyethylene units to form a solid and thereafter exposing said solidified admixture to high energy ionizing radiation at a dosage of 0.02-5 megarads.
Claim 7
Dependent Claim
137 words
The process of forming a cured crosslinked, three-dimensional network urea complexed polythioether which comprises admixing (1) a particulate urea having a mesh size of no greater than 10 microns in an amount ranging from 10-70 weight percent of the composition, and a liquid mixture of (2) a polyene containing at least two unsaturated carbon to carbon bonds per molecule and (3) a polythiol containing at least two thiol groups per molecule, the total combined functionality of the unsaturated carbon to carbon bonds per molecule in the polyene and the thiol groups per molecule in the polythiol being greater than 4, and the combined polyene and polythiol containing at least 20 percent by weight of oxyethylene units to form a solid and thereafter exposing said solidified admixture to high energy ionizing radiation at a dosage of 0.02-5 megarads.
Claim 8
Dependent Claim
143 words
The process of forming a cured crosslinked, three-dimensional network urea complexed polythioether which comprises admixing (1) a particulate urea having a mesh size of no greater than 10 microns in an amount ranging from 10-70 weight percent of the composition, and a liquid mixture of (2) a polyene containing at least two unsaturated carbon to carbon bonds per molecule (3) a polythiol containing at least two thiol groups per molecule, the total combined functionality of the unsaturated carbon to carbon bonds per molecule in the polyene and the thiol groups per molecule in the polythiol being greater than 4, and the combined polyene and polythiol containing at least 20 percent by weight of oxyethylene units and (4) a photocuring rate accelerator to form a solid and thereafter exposing the solidified admixture to U. V. radiation at an intensity of 0.0004-60.0 watts/cm, 2 .
Claim 9
Dependent Claim
143 words
The process of forming a cured crosslinked, three-dimensional network urea complexed polythioether which comprises admixing (1) a particulate urea having a mesh size of no greater than 10 microns in an amount ranging from 10-70 weight percent of the composition, and a liquid mixture of (2) a polyene containing at least two unsaturated carbon to carbon bonds per molecule (3) a polythiol containing at least two thiol groups per molecule, the total combined functionality of the unsaturated carbon to carbon bonds per molecule in the polyene and the thiol groups per molecule in the polythiol being greater than 4, and the combined polyene and polythiol containing at least 20 percent by weight of oxyethylene units and (4) a photocuring rate accelerator to form a solid and thereafter exposing the solidified admixture to U. V. radiation at an intensity of 0.0004-60.0 watts/cm, 2 .
Claim 10
Dependent Claim
14 words
An article comprising the composition of claim 1 as a coating on a substrate.
Claim 11
Dependent Claim
14 words
An article comprising the composition of claim 2 as a coating on a substrate.
Claim 12
Dependent Claim
11 words
A shape molded article cast from the composition of claim 1.
Claim 13
Dependent Claim
11 words
A shape molded article cast from the composition of claim 2.
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) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |