US3890255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cure catalyzed polyurethane composition
Assignee: Olin Corp
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Filing: 1973-05-31
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Granted: 1975-06-17
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Expires: 1993-05-31
Abstract
Abstract An improvement is disclosed in the preparation of fast-curing polyurethane elastomers and foams. The improvement is in the use of an oxyalkylated alkanolamine as a cross-linking agent. The resulting polyurethanes are useful in coatings and in various cushioning applications.
Inventors
- 👤 Leuwen Bruce G Van
- 👤 Donald G Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:46
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/4804; C08G18/482
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
181 words
IN A FLELXIBLE POLYURETHANE FOAM PREPARED BY THE PROCESS WHICH COMPRISES REACTING, IN THE PRESENCE A REACTION CATALYST, A FOAMING AGENT, AND A DURING AGENT, AN ORGANIC POLYISOCYANATE WITH AN OXYPROPYLATED OXYETHYLATED POLYETHER TRIOL CHARACTERIZED BY (1) A MOLECULAR WEIGHT OF ABOUT 5,800-6,600, (2) AN ALIPHATIC TRIOL NUCLEUS, (3) POLYOXPROPYLENE CHAIN SEGMENTS ATTACHED THROUGH ONE END THEREOF TO SAID NUCLEUS, AND (4) POLYOXYETHYLENE CHAIN SEGMENTS ATTACHED THROUGH ONE END THEREOF TO SAID POLYOXYPROPYLENE CHAIN SEGMENTS, WITH THE PROVISO THAT SAID POLYETHER TRIOL CONTAINS ABOUT 7-18 MOLES OF SAID ETHYLENE OXIDE PER EVERY MOLE OF SAID ALIPHATIC TRIOL, THE IMPROVEMENT OF EMPOLYING AS SAID CURING AGENT AN OXYALKYLATED ALKANOLAMINE, IN A PROPORTION OF ABOUT 1-6 PARTS PER EVERY 100 PARTS BY WEIGHT OF SAID POLYETHER TRIOL, SAID OXYALKYLATED ALKANOLAMINE BEING SUBSTANTIALLY FREE OF PRIMARY HYDROXY GROUPS, HAVING A HYDROXYL NUMBER OF ABOUT 390-570, AND BEING THE PRODUCT OF CONDENSING AN ALKYLENE OXIIDEM, SELECTED FROM THE GROUP CONSISTING OF PROPYLENE OXIDE, BUTYLENE OXIDE AND A MIXTURE THEREOF, WITH AN ALKANOLAMINE SELECTED FROM THE GROUP CONSISTING OF AN ETHANOLAMINE, A PROPANOLAMINE AND AN ETHANOLPROPANOLAMINE.
Claim 2
Dependent Claim
181 words
IN A FLELXIBLE POLYURETHANE FOAM PREPARED BY THE PROCESS WHICH COMPRISES REACTING, IN THE PRESENCE A REACTION CATALYST, A FOAMING AGENT, AND A DURING AGENT, AN ORGANIC POLYISOCYANATE WITH AN OXYPROPYLATED OXYETHYLATED POLYETHER TRIOL CHARACTERIZED BY (1) A MOLECULAR WEIGHT OF ABOUT 5,800-6,600, (2) AN ALIPHATIC TRIOL NUCLEUS, (3) POLYOXPROPYLENE CHAIN SEGMENTS ATTACHED THROUGH ONE END THEREOF TO SAID NUCLEUS, AND (4) POLYOXYETHYLENE CHAIN SEGMENTS ATTACHED THROUGH ONE END THEREOF TO SAID POLYOXYPROPYLENE CHAIN SEGMENTS, WITH THE PROVISO THAT SAID POLYETHER TRIOL CONTAINS ABOUT 7-18 MOLES OF SAID ETHYLENE OXIDE PER EVERY MOLE OF SAID ALIPHATIC TRIOL, THE IMPROVEMENT OF EMPOLYING AS SAID CURING AGENT AN OXYALKYLATED ALKANOLAMINE, IN A PROPORTION OF ABOUT 1-6 PARTS PER EVERY 100 PARTS BY WEIGHT OF SAID POLYETHER TRIOL, SAID OXYALKYLATED ALKANOLAMINE BEING SUBSTANTIALLY FREE OF PRIMARY HYDROXY GROUPS, HAVING A HYDROXYL NUMBER OF ABOUT 390-570, AND BEING THE PRODUCT OF CONDENSING AN ALKYLENE OXIIDEM, SELECTED FROM THE GROUP CONSISTING OF PROPYLENE OXIDE, BUTYLENE OXIDE AND A MIXTURE THEREOF, WITH AN ALKANOLAMINE SELECTED FROM THE GROUP CONSISTING OF AN ETHANOLAMINE, A PROPANOLAMINE AND AN ETHANOLPROPANOLAMINE.
Claim 3
Dependent Claim
14 words
The polyurethane foam of claim 1 wherein said curing agent is an oxypropylated triethanolamine.
Claim 4
Dependent Claim
23 words
The polyurethane foam of claim 1 wherein said reaction catalyst is a mixture of an organo-metallic salt and one or more tertiary amines.
Claim 5
Dependent Claim
51 words
A one-shot polyurethane foam as claimed in claim 3 wherein said organo-metallic salt is stannous octoate and said tertiary amine is selected from the group consisting of triethylenediamine, a mixture of triethylenediamine and dipropylene glycol, a mixture of bis(dimethylaminoethyl ether) and dipropylene glycol, dimethylcyclohexylamine, and a mixture of demethylcyclohexylamine and 2-(3-pentyl)-1-dimethylaminocyclohexane.
Claim 6
Dependent Claim
18 words
The polyurethane foam of claim 4 wherein said foam is prepared in the presence of a polydimethylsiloxane surfactant.
Claim 7
Dependent Claim
25 words
The polyurethane foam of claim 5 wherein said polyether triol contains about 14-16 moles of said ethylene oxide per every mole of said aliphatic triol.
Claim 8
Dependent Claim
12 words
The polyurethane foam of claim 6 wherein said foaming agent is water.
Claim 9
Dependent Claim
48 words
The polyurethane foam of claim 7 wherein said aliphatic triol is glycerin and said polyether triol has a molecular weight of about 6,000 and is the product of sequentially condensing glycerin first with about 90 moles of propylene oxide and then with about 15 moles of ethylene oxide.
Claim 10
Dependent Claim
14 words
The polyurethane foam of claim 8 wherein said curing agent is an oxypropylated triethanolamine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |