US4386191A
Expired / Lapsed
US
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Compositions for forming poly(oxazolidone/urethane) thermosets and products therefrom
Assignee: Stauffer Chemical Co
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Filing: 1981-10-08
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Granted: 1983-05-31
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Expires: 2001-10-08
Abstract
Abstract Reaction of a polyol, acid anhydride and diepoxide, preferably in a single step, yields a prepolymer composition containing a prepolymer containing terminal epoxy and non-terminal, secondary hydroxy groups. Reaction of this prepolymer with a polyisocyanate yields a poly(oxazolidone/urethane) thermoset composition which is essentially free of isocyanurate linkages. The thermoset contains oxazolidone linkages in the backbone of its recurring unit and urethane linkages which are present in a side chain of the unit.
Inventors
- 👤 Anthony L. DiSalvo
- 👤 Chung-Chieh Tsai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:02
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/02; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/58; C08G18/581; C08G2120/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
27 words
The reaction of polyol, acid anhydride and diepoxide, in a single step, to form a prepolymer containing two terminal epoxide groups and two nonterminal, secondary hydroxy groups.
Claim 2
Dependent Claim
27 words
The reaction of polyol, acid anhydride and diepoxide, in a single step, to form a prepolymer containing two terminal epoxide groups and two nonterminal, secondary hydroxy groups.
Claim 3
Dependent Claim
26 words
The reaction of claim 1 wherein the polyol is selected from the group consisting of polyethylene glycol, polypropylene glycol, ethylene glycol, propylene glycol, and polytetramethylene glycol.
Claim 4
Dependent Claim
22 words
The reaction of claim 1 wherein the acid anhydride is selected from the group consisting of the aromatic and aliphatic acid anhydrides.
Claim 5
Dependent Claim
47 words
The reaction of claim 1 wherein the diepoxide is selected from the group consisting of the diglycidyl ethers of dihydric mononuclear and fused ring phenols, the diglycidyl ethers of novolac resins, dicyclopentadiene dioxide, vinylcyclohexene dioxide, the dicyclohexyl oxide carboxylates, and the diglycidyl derivatives of aromatic primary amines.
Claim 6
Dependent Claim
43 words
The reaction of claim 1 wherein the amount of equivalents of polyol hydroxyl is 2, the molar amount of acid anhydride is not in excess of about 2 and the molar amount of diepoxide is not less than that of the acid anhydride.
Claim 7
Dependent Claim
56 words
A non-cured prepolymer composition which is produced by any of the processes of claims 1-5 in which the composition is a mixture of prepolymers of the formulae: ##STR5## wherein any of R 1 -R 5 are independently alkylene, arylene, and alkylene/arylene, and where R is the same as R 1 -R 5 and also includes hydrogen.
Claim 8
Dependent Claim
48 words
A composition for the production of thermoset compositions containing oxazolidone and urethane linkages which comprises a polyisocyanate and a prepolymer composition containing a prepolymer with two terminal epoxy groups, two non-terminal, secondary hydroxy groups and ester linkages obtained by reacting a polyol, an acid anhydride, and a diepoxide.
Claim 9
Dependent Claim
48 words
A composition for the production of thermoset compositions containing oxazolidone and urethane linkages which comprises a polyisocyanate and a prepolymer composition containing a prepolymer with two terminal epoxy groups, two non-terminal, secondary hydroxy groups and ester linkages obtained by reacting a polyol, an acid anhydride, and a diepoxide.
Claim 10
Dependent Claim
21 words
A composition as claimed in claim 7 wherein the prepolymer composition contains a prepolymer of formula (b) shown in claim 6.
Claim 11
Dependent Claim
27 words
A composition as claimed in either of claims 7 or 8 which also contains in the prepolymer composition a prepolymer of formula (a) shown in claim 6.
Claim 12
Dependent Claim
15 words
A thermoset composition formed by the reaction of the composition in any of claims 7-8.
Claim 13
Dependent Claim
26 words
A thermoset composition formed by reaction of the composition in any of claims 7-8 which also contains a prepolymer of formula (a) shown in claim 6.
Claim 14
Dependent Claim
50 words
A thermoset composition containing oxazolidone and urethane linkages in its recurring unit which is essentially free of isocyanurate linkages, said oxazolidone linkages being present in the polymer backbone and separated from one another by ester linkages, said urethane linkages being present in a side chain attached to the polymer backbone.
Claim 15
Dependent Claim
50 words
A thermoset composition containing oxazolidone and urethane linkages in its recurring unit which is essentially free of isocyanurate linkages, said oxazolidone linkages being present in the polymer backbone and separated from one another by ester linkages, said urethane linkages being present in a side chain attached to the polymer backbone.
Claim 16
Dependent Claim
22 words
A composition as claimed in claim 12 wherein the molar amount of oxazolidone to urethane ranges from about 90:10 to about 2:98.
Claim 17
Dependent Claim
15 words
A composition as claimed in claim 12 which further comprises at least one reinforcing agent.
Claim 18
Dependent Claim
46 words
A composition as claimed in claim 12 which contains a recurring unit having the formula: ##STR6## where R and R 1 -R 5 are independently alkylene, arylene, and alkylene/arylene, and R 6 -R 17 are the same as R 1 -R 5 and also include hydrogen.
Claim 19
Dependent Claim
43 words
The composition of claim 12 which also contains a recurring unit of the formula: ##STR7## where R and R 1 -R 3 are independently alkylene, arylene, and alkylene/arylene, and R 4 -R 9 are the same as R-R 3 and also include hydrogen.
Claim 20
Dependent Claim
16 words
A composition as claimed in any of claims 12-16 formed in a reaction injection molding process.
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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) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |