US4483759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Actinic radiation cured polyurethane acrylic copolymer
Assignee: Thermo Fisher Scientific Inc
•
Filing: 1982-07-02
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Granted: 1984-11-20
•
Expires: 2002-07-02
Abstract
Abstract The actinic radiation cured composition of this invention comprises a polyurethane acrylic copolymer containing a light scattering or fluorescing material. The polyurethane acrylic copolymer is fully cured and is flexible and elastomeric.
Inventors
- 👤 Michael Szycher
- 👤 Donald J. Dempsey
- 👤 Jonathan L. Rolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:41
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/06; C08F299/065; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C08G18/672
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
A process for forming a polyurethane acrylic composition comprising: (A) providing reactants comprising: (1) a diisocyanate; (2) a glycol having a molecular weight between the range of 500-5,000 molecular weight units; (3) an acrylyl chain terminator having a molecular weight between the range of 40-200 molecular weight units; (4) a catalyst capable of catalyzing urethane bond formation; and (5) a photosensitizer; and wherein there are 2 diisocyanate units for each glycol unit; and there is only one acrylyl group terminator at each end of the polyurethane chain; (B) mixing the reactants to form a reactive mixture; (C) degassing the reactive mixture to remove entrained air; and (D) actinic radiation curing the reactive mixture to form a polyurethane composition.
Claim 2
Dependent Claim
118 words
A process for forming a polyurethane acrylic composition comprising: (A) providing reactants comprising: (1) a diisocyanate; (2) a glycol having a molecular weight between the range of 500-5,000 molecular weight units; (3) an acrylyl chain terminator having a molecular weight between the range of 40-200 molecular weight units; (4) a catalyst capable of catalyzing urethane bond formation; and (5) a photosensitizer; and wherein there are 2 diisocyanate units for each glycol unit; and there is only one acrylyl group terminator at each end of the polyurethane chain; (B) mixing the reactants to form a reactive mixture; (C) degassing the reactive mixture to remove entrained air; and (D) actinic radiation curing the reactive mixture to form a polyurethane composition.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein in step (D) actinic radiation comprises ultraviolet radiation.
Claim 4
Dependent Claim
13 words
Th process of claim 1 wherein in step (A) the diisocyanate is aliphatic.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein the catalyst is dioctyl tin dilaurate.
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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) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |