Compositions of alkanolamine salts of alkyl phosphate esters
US6821944B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Jun 3, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K23/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed are pumpable surfactant compositions of alkanolamine salts of alkyl phosphate esters. The compositions have a solids content of about 60% by weight or more. Alkanolamines useful in preparation of the alkyl phosphate ester salts of the compositions of the present invention have the following formula III: wherein R4 to R6 are, individually, hydrogen or C1-8, linear or branched alkyl, alkenyl, alkaryl or aralkyl hydrocarbon moieties, which optionally may contain carbocyclic rings. At least one of the amine substituents is different from the other two. For at least one of the three substituents on the amine nitrogen, the sum of s and t (s+t) or v and w (v+w) or x and y (x+y) is equal to or greater than 1 and the corresponding R (R4, R5 or R6) is hydrogen. The subscripts p and q, individually, may be the same or different and are integers from 2 to 4. The subscripts s, t, v, w, x, and y, individually, may be the same or different and are integers of from 0 to 10, with the proviso that the sum of all six of the subscripts is less than or equal to 12.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.