Treatment of metal surfaces
Abstract
Abstract Complex phosphate ester surfactants derived from a quaternary dihydroxy compound having the formula ##STR1## wherein R and R 1 represent the same or different alkyl moieties containing 1 to 22 carbon atoms, the sum of R and R 1 not being less than 7 carbon atoms; R 2 and R 3 each represent H or CH 3 ; n is an integer having an average value of from 1 to 50; X is an anion of halogen, sulfate, or alkyl sulfate; and wherein the resultant complex phosphate ester contains at least 1/3 P atom per mole of quaternary dihydroxy compound; can be made through reaction of such dihydroxy quaternary compound with a conventional phosphating agent such as P 2 O 5 , polyphosphoric acid, or POCl 3 to form interesting amphoteric surface active agents having utility as metal lubricants, heavy duty cleaners, detergents, etc.
Inventors
- 👤 Robert J. Verdicchio
- 👤 Louis J. Nehmsmann, III
Bibliographic Details
Claims Analysis
Total Claims: 8References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |