Patent US4377679A successfully refreshed from Google Patents.
US4377679A
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US
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Photocurable compositions based on acrylate polyester urethanes
Assignee: Northrop Grumman Innovation Systems LLC
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Filing: 1982-01-28
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Granted: 1983-03-22
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Expires: 2002-01-28
Abstract
Abstract Provided are processes for preparing compositions useful in photopolymerizable compositions, which processes comprise: A. reacting a polyether diol and an acrylic acid in about equal molar proportions; and B. 1. reacting a polyether diol and an acrylic acid in about equal molar proportions and 2. reacting the product of step B1, a hydroxyalkylacrylate and an organic diisocyanate in about equal molar proportions. Also provided are the products of these processes. These products are useful in photopolymerizable compositions which may typically contain, in addition to said products, N-vinyl-2-pyrrolidone and a photoinitiator.
Inventors
- 👤 Claude J. Schmidle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:53
CPC Classifications
C; C08; C08F; C08F290/00; C08F290/02; C08F290/06; C08F290/062; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C08G18/672; Y; Y10; Y10S; Y10S525/00; Y10S525/92
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
45 words
A process for preparing compositions for use in photopolymerizable compositions comprising: A. reacting a polyether diol and an acrylic acid in about equal molar proportions, and B. reacting the product of step A, a hydroxyalkyl acrylate and an organic diisocyanate in about equal molar proportions.
Claim 2
Dependent Claim
45 words
A process for preparing compositions for use in photopolymerizable compositions comprising: A. reacting a polyether diol and an acrylic acid in about equal molar proportions, and B. reacting the product of step A, a hydroxyalkyl acrylate and an organic diisocyanate in about equal molar proportions.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the polyether diol is a polypropylene glycol diol.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein the acrylic acid is acrylic acid.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein the polyether diol is a polypropylene glycol end-capped with ethylene oxide.
Claim 6
Dependent Claim
14 words
The process of claim 4 wherein the polypropylene glycol has the average formula: ##STR5##
Claim 7
Dependent Claim
17 words
The process of claim 1 wherein the hydroxyalkyl acrylate is selected from 2-hydroxyethyl acrylate and 2-hydroxypropyl acrylate.
Claim 8
Dependent Claim
13 words
The process of claim 1 wherein the organic diisocyanate is an aliphatic diisocyanate.
Claim 9
Dependent Claim
26 words
The process of claim 1 wherein the organic diisocyanate is selected from isophorone diisocyanate; 2,4-tolylene diisocyanate; 2,6-tolylene diisocyanate; hexamethylene diisocyanate; trimethyl hexamethylene diisocyanate and dicyclohexylmethane diisocyanate.
Claim 10
Dependent Claim
9 words
The product made by the process of claim 1.
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) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |