Patent US3979365A successfully refreshed from Google Patents.
US3979365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing thermosetting resins
Assignee: Hitachi Ltd
•
Filing: 1974-08-28
•
Granted: 1976-09-07
•
Expires: 1994-08-28
Abstract
Abstract Thermosetting resins are produced by blending 1 equivalent of a polyoxazolidone terminated by two vicinal epoxy groups and containing at least two oxazolidone rings with at least 1 equivalent of a polyfunctional isocyanate compound, adding 0.01 to 10% by weight of a catalyst which forms isocyanurate rings and oxazolidone rings based on the total amount of the polyoxazolidone and the isocyanate compound, and then heating the resulting composition to polymerize the composition by forming isocyanurate rings and oxazolidone rings. The resin compositions have excellent mechanical properties, and particularly excellent flexibility, and excellent thermal resistance.
Inventors
- 👤 Goro Tanaka
- 👤 Shinichi Toyoda
- 👤 Toshikazu Narahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:59
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/26; C08G18/00; C08G18/003; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4028; C08G2115/00; C08G2115/02; Y; Y10; Y10S; Y10S525/00; Y10S525/909
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
83 words
A process for producing a thermosetting resin which comprises blending 1 equivalent of a polyoxazolidone prepolymer terminated by two vicinal epoxy groups and containing at least two oxazolidone rings with at least 1 equivalent of a polyfunctional isocyanate compound, adding 0.01 to 10% by weight of a catalyst which forms isocyanurate rings and oxazolidone rings based on the total amount of the polyoxazolidone prepolymer and the isocyanate compound, and then heating to polymerize the resultant composition by forming isocyanurate rings and oxazolidone rings.
Claim 2
Dependent Claim
83 words
A process for producing a thermosetting resin which comprises blending 1 equivalent of a polyoxazolidone prepolymer terminated by two vicinal epoxy groups and containing at least two oxazolidone rings with at least 1 equivalent of a polyfunctional isocyanate compound, adding 0.01 to 10% by weight of a catalyst which forms isocyanurate rings and oxazolidone rings based on the total amount of the polyoxazolidone prepolymer and the isocyanate compound, and then heating to polymerize the resultant composition by forming isocyanurate rings and oxazolidone rings.
Claim 3
Dependent Claim
83 words
A process for producing a thermosetting resin which comprises blending 1 equivalent of a polyoxazolidone prepolymer terminated by two vicinal epoxy groups and containing at least two oxazolidone rings with at least 1 equivalent of a bifunctional isocyanate compound, adding 0.01 to 10% by weight of a catalyst which forms isocyanurate rings and oxazolidone rings based on the total amount of the polyoxazolidone prepolymer and the isocyanate compound, and then heating to polymerize the resultant composition by forming isocyanurate rings and oxazolidone rings.
Claim 4
Dependent Claim
83 words
A process for producing a thermosetting resin which comprises blending 1 equivalent of a polyoxazolidone prepolymer terminated by two vicinal epoxy groups and containing at least two oxazolidone rings with at least 1 equivalent of a bifunctional isocyanate compound, adding 0.01 to 10% by weight of a catalyst which forms isocyanurate rings and oxazolidone rings based on the total amount of the polyoxazolidone prepolymer and the isocyanate compound, and then heating to polymerize the resultant composition by forming isocyanurate rings and oxazolidone rings.
Claim 5
Dependent Claim
25 words
A process according to claim 1, wherein 1 equivalent of the polyoxazolidone prepolymer is blended with 1 to 20 equivalents of the polyfunctional isocyanate compound.
Claim 6
Dependent Claim
24 words
A process according to claim 1, wherein 1 equivalent of the polyoxazolidone prepolymer is blended with 1 to 10 equivalents of the polyfunctional compound.
Claim 7
Dependent Claim
24 words
A process according to claim 1, wherein the polyoxazolidone prepolymer is terminated by two vicinal epoxy groups and contains 2 to 50 oxazolidone rings.
Claim 8
Dependent Claim
99 words
A process for producing a thermosetting resin which comprises blending 1 equivalent of a polyoxazolidone prepolymer terminated by two vicinal epoxy groups and containing at least two oxazolidone rings with at least 1 equivalent of a polyfunctional isocyanate compound, adding 0.01 to 10% by weight of a catalyst which forms isocyanurate rings and oxazolidone rings based on the total amount of the polyoxazolidone prepolymer and the isocyanate compound, and heating the resultant composition to cause (a) formation of isocyanurate rings by effecting trimerization of said isocyanate compound and thereafter (b) polymerization of the composition by formation of oxazolidone rings.
Claim 9
Dependent Claim
99 words
A process for producing a thermosetting resin which comprises blending 1 equivalent of a polyoxazolidone prepolymer terminated by two vicinal epoxy groups and containing at least two oxazolidone rings with at least 1 equivalent of a polyfunctional isocyanate compound, adding 0.01 to 10% by weight of a catalyst which forms isocyanurate rings and oxazolidone rings based on the total amount of the polyoxazolidone prepolymer and the isocyanate compound, and heating the resultant composition to cause (a) formation of isocyanurate rings by effecting trimerization of said isocyanate compound and thereafter (b) polymerization of the composition by formation of oxazolidone rings.
Claim 10
Dependent Claim
98 words
A process for producing a thermosetting resin which comprises blending 1 equivalent of a polyoxazolidone prepolymer terminated by two vicinal epoxy groups and containing at least two oxazolidone rings with at least 1 equivalent of a bifunctional isocyanate compound, adding 0.01 to 10% by weight of a catalyst which forms isocyanurate rings and oxazolidone rings based on the total amount of the polyoxazolidone prepolymer and the isocyanate compound, and heating the resultant composition to cause formation of isocyanurate rings by effecting trimerization of said isocyanate compound and thereafter (b) polymerization of the composition by formation of oxazolidone rings.
Claim 11
Dependent Claim
98 words
A process for producing a thermosetting resin which comprises blending 1 equivalent of a polyoxazolidone prepolymer terminated by two vicinal epoxy groups and containing at least two oxazolidone rings with at least 1 equivalent of a bifunctional isocyanate compound, adding 0.01 to 10% by weight of a catalyst which forms isocyanurate rings and oxazolidone rings based on the total amount of the polyoxazolidone prepolymer and the isocyanate compound, and heating the resultant composition to cause formation of isocyanurate rings by effecting trimerization of said isocyanate compound and thereafter (b) polymerization of the composition by formation of oxazolidone rings.
Claim 12
Dependent Claim
24 words
A process according to claim 6, wherein 1 equivalent of the polyoxazolidone is blended with 1 to 20 equivalents of the polyfunctional isocyanate compound.
Claim 13
Dependent Claim
25 words
A process according to claim 6, wherein 1 equivalent of the polyoxazolidone prepolymer is blended with 1 to 10 equivalents of the polyfunctional isocyanate compound.
Claim 14
Dependent Claim
26 words
A process according to claim 6, wherein the polyoxazolidone prepolymer is prepolymer is terminated by two vicinal epoxy groups and contains 2 to 50 oxazolidone rings.
Claim 15
Dependent Claim
61 words
A process according to claim 1, wherein said catalyst is selected from the group consisting of tertiary amines, N-substituted morpholine derivatives having alkyl, alkaryl, aralkyl, cyano-alkylene or morpholino-alkylene as a substituent, quaternary ammonium salts having a long chain alkyl of 8 or more carbon atoms and imidazole derivatives having alkyl cyano-alkylene or triazinoalkylene at any one of 1-, 2- and 4-positions.
Claim 16
Dependent Claim
33 words
A process according to claim 11, wherein said catalyst is selected from the group consisting of tertiary amines, N-allyldodecyl morpholine, butylene dimorpholine, hexamethylene dimorpholine, cyanoethyl morpholine, triazino-ethyl morpholine, N-methyl morpholine, and N-ethyl morpholine.
Claim 17
Dependent Claim
61 words
A process according to claim 6, wherein said catalyst is selected from the group consisting of tertiary amines, N-substituted morpholine derivatives having alkyl, arkaryl, aralkyl, cyano-alkylene or morpholino-alkylene as a substituent, quaternary ammonium salts having a long chain alkyl of 8 or more carbon atoms and imidazole derivatives having alkyl cyano-alkylene or triazinoalkylene at any one of 1-, 2- and 4-positions.
Claim 18
Dependent Claim
33 words
A process according to claim 13 wherein said catalyst is selected from the group consisting of tertiary amines, N-allyldodecyl morpholine, butylene dimorpholine, hexamethylene dimorpholine, cyanoethyl morpholine, triazino-ethyl morpholine, N-methyl morpholine, and N-ethyl morpholine.
Claim 19
Dependent Claim
23 words
A process according to claim 1, wherein said catalyst is such that trimerization of the isocyanate compounds precedes the formation of oxazolidone rings.
Claim 20
Dependent Claim
23 words
A process according to claim 2, wherein said catalyst is such that trimerization of the isocyanate compounds precedes the formation of oxazolidone rings.
Claim 21
Dependent Claim
23 words
A process according to claim 6, wherein said catalyst is such that trimerization of the isocyanate compounds precedes the formation of oxazolidone rings.
Claim 22
Dependent Claim
23 words
A process according to claim 7, wherein said catalyst is such that trimerization of the isocyanate compounds precedes the formation of oxazolidone rings.
Claim 23
Dependent Claim
55 words
A process according to claim 11, wherein said diepoxide and said diisocyanate are reacted at 100° to 200°C. for about 0.1 to 10 hours in the presence of 0.1 to 10 parts by weight per 100 parts by weight of the mixture of the diepoxide and diisocyanate of said lithium butoxide or quaternary ammonium salt.
References Cited (Backward Citations)
US3020262A
Cited
US3494888A
Cited
US3694406A
Cited
US3793236A
Cited
US3817938A
Cited
US3721650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |