US4267078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for easily degrading waste consisting of the reaction products of organic compounds containing isocyanate groups with alcohols and/or water
Assignee: Evonik Operations GmbH
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Filing: 1979-07-05
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Granted: 1981-05-12
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Expires: 1999-07-05
Abstract
Abstract A method for easily degrading wastes consisting of the reaction products of organic materials containing isocyanate groups and specifically foamed polyurethane wastes by comminuting the waste and reacting it with alkylene oxide at 120 DEG C. to 200 DEG C. and removing the unreacted alkylene oxide. The products obtained are homogeneous liquids which can be added to polyols for reaction with isocyanates to form foamed polyurethanes.
Inventors
- 👤 Werner Lidy
- 👤 Gerd Rossmy
- 👤 Hans-Joachim Kollmeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:26
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/18; C08J11/22; C08J2375/00; C08J2375/04; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A process for easily degrading waste composed of the reaction products of organic compounds containing isocyanate groups with alcohols or water, consisting essentially of mechanically comminuting the waste, reacting at least 20% by weight of an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and mixtures thereof, based on the total weight of the waste, with the waste in a closed reactor at temperatures of from 120° C. to 200° C., and then removing any unreacted alkylene oxide.
Claim 2
Dependent Claim
82 words
A process for easily degrading waste composed of the reaction products of organic compounds containing isocyanate groups with alcohols or water, consisting essentially of mechanically comminuting the waste, reacting at least 20% by weight of an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and mixtures thereof, based on the total weight of the waste, with the waste in a closed reactor at temperatures of from 120° C. to 200° C., and then removing any unreacted alkylene oxide.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein equal parts by weight of the alkylene oxide are reacted with the waste.
Claim 4
Dependent Claim
34 words
The process of claims 1 or 2 wherein the waste is dispersed in a polyol in amounts of 10 to 50% by weight, based on the polyol and then reacted with the alkylene oxide.
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) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |