US3240730A
Expired / Lapsed
US
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Method of reacting an organic polyisocyanate with a lactone polymer in the presence of an organometallic tin catalyst
Assignee: Union Carbide Corp
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Filing: 1963-07-31
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Granted: 1966-03-15
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Expires: 1983-07-31
Abstract
No abstract record available.
Inventors
- 👤 Hostettler Fritz
- 👤 Eugene F Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:31
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/122; C; C07; C07F; C07F7/00; C07F7/22; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/24; C08G18/242; C08G18/28; C08G18/30; C08G18/38; C08G18/40; C08G18/42; C08G18/4266; C08G18/4269; C08G18/4277; C08G18/48; C08G18/62; C08G18/64; C08G18/6415; C08G18/6446; C08G18/6484; C08G18/70; C08G18/72; C08G18/77
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
THE METHOD WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANTA, WATER AND A COPOLYMER PRODUCED BY REACTING A POLYFUNCTIONAL INITIATOR HAVING REACTIVE HYDROGEN ATOMS WITH AN IPSILON-CAPROLACTONE AND ALKYLENE OXIDE OF FROM 2 TO 4 CARBON ATOMS, SAID COPOLYMER HAVING TERMINAL HYDROXYL GROUPS, IN THE PRESENCE OF A CATALYTIC AMOUNT OF AN ORGANOTIN COMPOUND HAVING AT LEAST ONE CARBON TO TIN BOND, ANY REMAINING BONDS FROM TIN BEING TO A MEMBER OF THE GROUP CONSISTING OF HALOGEN, HYDROGEN, OXYGEN, NITROGEN, SULFUR AND PHOSPHORUS ATOMS, TO FORM A POLYURETHANE FOAM.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |