US3567664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foams stabilized against scorch with a mixture of butylated hydroxy toluene and p,p'-dioctyl diphenyl amine
Assignee: Olin Corp
•
Filing: 1968-10-15
•
Granted: 1971-03-02
•
Expires: 1988-10-15
Abstract
Abstract POLYURETHANE FOAMS ARE STABILIZED AGAINST SCORCHING WHEN A MIXTURE OF 2,6-DITERTIARY-BUTYL-4-METHYL PHENOL AND A P,P''-DIALKYL DIPHENYL AMINE CONTAINING BETWEEN ABOUT 3 AND ABOUT 18 CARBON ATOMS IN THE ALKYL, IS PRESENT IN A FOAM FORMING REACTION MIXUTRE OF AN ORGANIC DIISOCYANATE, THE REACTION PRODUCT OF A 1,2-OXIDE AND AN ALIPHATIC POLYHYDRIC ALCOHOL CONTAINS BETWEEN 2 AND 6 HYDROXYL GROUPS AND 2 AND 8 CARBON ATOMS PER MOLECULE, A REACTGION CATALYST AND A FOAMING AGENT. THE PROPORTION OF THE AMINE IN THE STABILIZING MIXTURE IS BETWEEN ABOUT 15 AND 90 PERCENT BY WEIGHT.
Inventors
- 👤 Robert C Haring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:17
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/16; C08K5/17; C08K5/18; C08J2375/00; C08J2375/04; C08J2375/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |