US3886228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane composition curable with polyamine/acid anhydride adduct
Assignee: WR Grace and Co
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Filing: 1974-06-03
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Granted: 1975-05-27
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Expires: 1994-06-03
Abstract
Abstract A single-package curable polyurethane resin composition containing a polyisocyanate which may or may not be blocked and as a curing agent a condensation product obtained by reacting, with removal of an equimolecular proportion of water, approximately equimolecular proportions of diethylenetriamine or triethylenetetramine with phthalic or hexahydrophthalic anhydride, maleic anhydride or succinic anhydride. Epoxy resin may also be present in the composition.
Inventors
- 👤 Justin C Bolger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:34
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6415; C08G18/6438; C08G18/08; C08G18/10; C08G18/60; C08G18/603
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
98 words
A CURABLE POLYURETHANE RESIN COMPOSITION COMPRISING A POLYISOCYANATE AND A CURING AGENT THEREFOR A CONDENSATION PRODUCT OBTAINED BY REACTING, WITH REMOVAL OF AN EQUIMOLECULAR PROPORTION OF WATER, APPROXIMATELY EQUIMOLECULAR PROPORTIONS OF AN AMINE SELECTED FROM THE GROUP CONSISTING OF DIETHYLENETRIAMINE AND TRIETHYLENETETRAMINE WITH AN ANHYDRDIDE SELECTED FROM THE GROUP CONSISTING OF PHTHALIC ANHYDRIDE, HEXAHYDROPHTHALIC ANHYDRIDE, MALEIC ANHYDRIDE AND SUCCINIC ANHYDRIDE, SAID CONDENSATION PRODUCT HAVING A MELTING POINT FROM 75* TO 130*., THE AMOUNT OF SAID CNDENSATION PRODUCT BEING AT LEAST ENOUGHT TO PROVIDE PRIMARY AND SECONDARY AMINO HYDROGEN ATOMS EQUIVALENT TO THE TOTAL NUMBER OF ISOCYANATE GROUPS PRESENT.
Claim 2
Dependent Claim
98 words
A CURABLE POLYURETHANE RESIN COMPOSITION COMPRISING A POLYISOCYANATE AND A CURING AGENT THEREFOR A CONDENSATION PRODUCT OBTAINED BY REACTING, WITH REMOVAL OF AN EQUIMOLECULAR PROPORTION OF WATER, APPROXIMATELY EQUIMOLECULAR PROPORTIONS OF AN AMINE SELECTED FROM THE GROUP CONSISTING OF DIETHYLENETRIAMINE AND TRIETHYLENETETRAMINE WITH AN ANHYDRDIDE SELECTED FROM THE GROUP CONSISTING OF PHTHALIC ANHYDRIDE, HEXAHYDROPHTHALIC ANHYDRIDE, MALEIC ANHYDRIDE AND SUCCINIC ANHYDRIDE, SAID CONDENSATION PRODUCT HAVING A MELTING POINT FROM 75* TO 130*., THE AMOUNT OF SAID CNDENSATION PRODUCT BEING AT LEAST ENOUGHT TO PROVIDE PRIMARY AND SECONDARY AMINO HYDROGEN ATOMS EQUIVALENT TO THE TOTAL NUMBER OF ISOCYANATE GROUPS PRESENT.
Claim 3
Dependent Claim
68 words
A curable polyurethane resin composition as claimed in claim 1 comprising in addition from 5% to 1900% by weight, based on the weight of polyisocyanate, of an epoxy resin containing an average of more than a single oxirane group per molecule together with an amount of said condensation product containing primary and secondary amino hydrogen atoms equivalent to 0.7 to 1.5 times the total number of oxirane groups.
Claim 4
Dependent Claim
50 words
A curable polyurethane resin composition as claimed in claim 1 in which said polyisocyanate is a prepolymer of a hydroxyl-containing organic compound having a molecular weight of at least 300 with an excess of a diisocyanate, said prepolymer having an average of more than a single isocyanate group per molecule.
Claim 5
Dependent Claim
50 words
A curable polyurethane resin composition as claimed in claim 2 in which said polyisocyanate is a prepolymer of a hydroxyl-containing organic compound having a molecular weight of at least 300 with an excess of a diisocyanate, said prepolymer having an average of more than a single isocyanate group per molecule.
Claim 6
Dependent Claim
45 words
A curable polyurethane resin composition as claimed in claim 1 in which said polyisocyanate is a blocked aromatic polyisocyanate in which at least 40% of the isocyanate groups are reacted with a blocking agent selected from the group consisting of phenols, polyphenols, and phenolic novolacs.
Claim 7
Dependent Claim
68 words
A curable polyurethane resin composition as claimed in claim 5 comprising in addition from 5% to 1900% by weight, based on the weight of polyisocyanate, of an epoxy resin containing an average of more than a single oxirane group per molecule together with an amount of said condensation product containing primary and secondary amino hydrogen atoms equivalent to 0.7 to 1.5 times the total number of oxirane groups.
Claim 8
Dependent Claim
52 words
A curable polyurethane resin composition as claimed in claim 6 in which said aromatic polyisocyanate is a prepolymer of a hydroxyl-containing organic compound having a molecular weight of at least 300 with an excess of an aromatic diisocyanate, said prepolymer having an average of more than a single isocyanate group per molecule.
Claim 9
Dependent Claim
18 words
A curable polyurethane resin composition as claimed in claim 7 in which said blocking agent is nonyl phenol.
Claim 10
Dependent Claim
18 words
A curable polyurethane resin composition as claimed in claim 7 in which said blocking agent is 2,4-dinonyl phenol.
Claim 11
Dependent Claim
16 words
A curable polyurethane resin composition as claimed in claim 1 in which said amine is diethylenetriamine.
Claim 12
Dependent Claim
31 words
A curable polyurethane resin composition as claimed in claim 1 in which said amine is diethylenetriAmine and said anhydride is selected from the group consisting of phthalic anhydride and maleic anhydride.
Claim 13
Dependent Claim
31 words
A curable polyurethane resin composition as claimed in claim 2 in which said amine is diethylenetriamine and said anhydride is selected from the group consisting of phthalic anhydride and maleic anhydride.
Claim 14
Dependent Claim
31 words
A curable polyurethane resin composition as claimed in claim 3 in which said amine is diethylenetriamine and said anhydride is selected from the group consisting of phthalic anhydride and maleic anhydride.
Claim 15
Dependent Claim
72 words
A curable polyurethane resin composition as claimed in claim 2 in which said amine is diethylenetriamine and said anhydride is selected from the group consisting of phthalic anhydride and maleic anhydride and in which said polyisocyanate is a prepolymer of a hydroxyl-containing organic compound having a molecular weight of at least 300 with an excess of a diisocyanate, said prepolymer having an average of more than a single isocyanate group per molecule.
Claim 16
Dependent Claim
30 words
A curable polyurethane composition as claimed in claim 5 in which said amine is diethylenetriamine and said anhydride is selected from the group consisting of phthalic anhydride and maleic anhydride.
Claim 17
Dependent Claim
31 words
A curable polyurethane resin composition as claimed in claim 6 in which said amine is diethylenetriamine and said anhydride is selected from the group consisting of phthalic anhydride and maleic anhydride.
Claim 18
Dependent Claim
31 words
A curable polyurethane resin composition as claimed in claim 7 in which said amine is diethylenetriamine and said anhydride is selected from the group consisting of phthalic anhydride and maleic anhydride.
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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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |