US3338873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerizing epoxides with ferric halide-propylene oxide condensate catalyst admixedwith an organic polyisocyanate
Assignee: Dow Chemical Co
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Filing: 1963-11-29
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Granted: 1967-08-29
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Gurgiolo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:20
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/269; C08G65/2645; C08G65/266
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A PROCESS FOR MAKING A POLYMERIC COMPOSITION COMPRISED OF AT LEAST A PREDOMINANT AMOUNT BY WEIGHT OF AT LEAST ONE POLYMERIZED ALIPHATIC EPOXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) 1,2-ALKYLENE OXIDES HAVING FROM 2 TO 4 CARBON ATOMS AND (B) EPICHLOROHYDRIN AND NOT MORE THAN A MINOR PROPORTION BY WEIGHT OF ANOTHER EPOXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) STYRENE OXIDE, (2) ALLYL GLYCIDYL ETHER, AND (3) DIGLYCIDYL ETHER OF BIS(4-HYDROXYPHENYL)DIMETHYL METHANE BY POLYMERIZATION OF SAID EPOXY COMPOUNDS IN CONTACT WITH A COMPLEX CATALYST CONDENSATE OF A FERRIC HALIDE AND PROPYLENE OXIDE, THE IMPROVEMENT WHICH CONSISTS IN CARRYING OUT THE POLYMERIZATION IN ADMIXTURE WITH AN ISOCYANATE SELECTED FROM THE GROUP CONSISTING OF (A) ORGANIC ISOCYANATES AND (B) ORGANIC ISOTHIOCYANATES IN AMOUNT BETWEEN 1 AND 20 PERCENT BY WEIGHT OF THE SUM OF THE WEIGHTS OF THE EPOXY COMPOUNDS.
Claim 2
Dependent Claim
143 words
IN A PROCESS FOR MAKING A POLYMERIC COMPOSITION COMPRISED OF AT LEAST A PREDOMINANT AMOUNT BY WEIGHT OF AT LEAST ONE POLYMERIZED ALIPHATIC EPOXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) 1,2-ALKYLENE OXIDES HAVING FROM 2 TO 4 CARBON ATOMS AND (B) EPICHLOROHYDRIN AND NOT MORE THAN A MINOR PROPORTION BY WEIGHT OF ANOTHER EPOXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) STYRENE OXIDE, (2) ALLYL GLYCIDYL ETHER, AND (3) DIGLYCIDYL ETHER OF BIS(4-HYDROXYPHENYL)DIMETHYL METHANE BY POLYMERIZATION OF SAID EPOXY COMPOUNDS IN CONTACT WITH A COMPLEX CATALYST CONDENSATE OF A FERRIC HALIDE AND PROPYLENE OXIDE, THE IMPROVEMENT WHICH CONSISTS IN CARRYING OUT THE POLYMERIZATION IN ADMIXTURE WITH AN ISOCYANATE SELECTED FROM THE GROUP CONSISTING OF (A) ORGANIC ISOCYANATES AND (B) ORGANIC ISOTHIOCYANATES IN AMOUNT BETWEEN 1 AND 20 PERCENT BY WEIGHT OF THE SUM OF THE WEIGHTS OF THE EPOXY COMPOUNDS.
References Cited (Backward Citations)
US2706181A
Cited
US2970984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |