US4540767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers based on bicyclic amide acetals/polyepoxides/polyisocyanates
Assignee: Ashland LLC
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Filing: 1984-12-04
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Granted: 1985-09-10
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Expires: 2004-12-04
Abstract
Abstract Novel polymers having excellent physical properties including heat distortion temperatures and izod impact strengths are prepared by the interaction of bicyclic amide acetals with epoxide resins and polyisocyanates.
Inventors
- 👤 Anil B. Goel
- 👤 Timothy A. Tufts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/58; C08G18/003; C08G18/30; C08G18/38; C08G18/3819; C08G18/3823; C08G18/3825; C08G18/3827
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
163 words
The process comprising reacting a mixture of a bicyclic amide acetal, an epoxy resin and a polyisocyanate at a temperature in the range of from about room temperature up to about 200° C. and at a pressure in the range of from about atmospheric up to about 100 atmospheres, wherein there is employed from 1 to 50% by weight of the total reactants of the bicyclic amide acetal, from 5 to 50% by weight of the total reactants of an eposide resin and from 0.8:1 to 3:1 equivalents of the polyisocyanate per combined equivalents of the bicyclic amide acetal and epoxy resin and wherein the bicyclic amide acetal corresponds to the formula ##STR3## wherein R, R' and R"' each independently represents hydrogen or an alkyl, an aryl, alkaryl or an ether group having from 1 to 18 carbon atoms and R" represents an alkyl group having from 1 to 18 carbon atoms or an aralkyl group having from 7 to 20 carbon atoms.
Claim 2
Dependent Claim
163 words
The process comprising reacting a mixture of a bicyclic amide acetal, an epoxy resin and a polyisocyanate at a temperature in the range of from about room temperature up to about 200° C. and at a pressure in the range of from about atmospheric up to about 100 atmospheres, wherein there is employed from 1 to 50% by weight of the total reactants of the bicyclic amide acetal, from 5 to 50% by weight of the total reactants of an eposide resin and from 0.8:1 to 3:1 equivalents of the polyisocyanate per combined equivalents of the bicyclic amide acetal and epoxy resin and wherein the bicyclic amide acetal corresponds to the formula ##STR3## wherein R, R' and R"' each independently represents hydrogen or an alkyl, an aryl, alkaryl or an ether group having from 1 to 18 carbon atoms and R" represents an alkyl group having from 1 to 18 carbon atoms or an aralkyl group having from 7 to 20 carbon atoms.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein the epoxy resin is a polyepoxide having at least two epoxy groups per molecule.
Claim 4
Dependent Claim
18 words
The process of claim 2 wherein the polyisocyanate is one having at least two isocyanate groups per molecule.
Claim 5
Dependent Claim
42 words
The process of claim 3 wherein the bicyclic amide acetal is one in which R, R' and R'" are H and R" is CH 3 , the epoxy resin is the diglycidyl ether of bis-phenol-A, and the polyisocyanate is 4,4'-methylene bis(phenyl isocyanate).
Claim 6
Dependent Claim
43 words
The process of claim 3 wherein the bicyclic amide acetal is one in which R, R' and R'" are H and R" is CH 3 , the epoxy resin is the diglycidyl ether of polypropylene glycol and the polyisocyanate is 4,4'-methylene bis(phenyl isocyanate).
Claim 7
Dependent Claim
9 words
The composition produced 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) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |