US3755215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of oil-modified polymers from a polyisocyanate composition
Assignee: EIDP Inc
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Filing: 1971-11-29
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Granted: 1973-08-28
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Expires: 1991-11-29
Abstract
Abstract A polyisocyanate composition having beneficial utility in the manufacture of polyurethane foams and other polymer products, and comprising certain proportions of tolylene diisocyanate (TDI), a phosgenation residue component and a specified type of hydrocarbon oil. Also a process for making polyurethane and polyurea products by causing said polyisocyanate composition to react with a polymeric polyol or other suitable active hydrogencontaining compound.
Inventors
- 👤 B Khoury
- 👤 F Yeager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:27
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/721; C08G18/727; C08K; C08K5/00; C08K5/01
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
34 words
A process according to claim 1 wherein a stripping agent for TDI is present while at least a portion of the TDI to be removed from said mixture during operation (c) is distilled off.
Claim 2
Dependent Claim
40 words
A process according to claim 1 wherein step II comprises mixing a polyfunctional hydroxy compound with the step I composition in proportions such that the resulting mixture contains about 0.9-2 equivalents of isocyanate groups per equivalent of said hydroxy compoUnd.
Claim 3
Dependent Claim
32 words
A process according to claim 3 wherein said hydroxy compound is a polymeric polyol selected from the group: polyalkylene ether polyols, hydroxyl-terminated polyaliphatic hydrocarbons and polyesters containing a plurality of hydroxyl groups.
Claim 4
Dependent Claim
28 words
A process according to claim 4 wherein a blowing agent is added to the mixture, and the blowing agent is activated so that a polyurethane foam is formed.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |