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US 5,643,864 AGranted
Anionic surfactants having multiple hydrophobic and hydrophilic groups
AssigneeRhone-Poulenc Inc.
InventorsJi Li, Manilal Dahanayake, Robert Lee Reierson, David James Tracy
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Abstract
According to the invention, an improved class of anionic surfactants having improved surfactant properties characterized as mild and environmentally safe have been provided comprising compounds of the formula: ##STR1## The anionic surfactants of the invention have at least two hydrophobic chains and at least two hydrophilic groups per molecule and are useful as emulsifiers, detergents, dispersant and solubilizing agents.
Claims14
Anionic surfactants comprising compounds of the formula:
- ##STR7## wherein R.sub.1 represents R.sub.4 --B--R.sub.5 wherein R.sub.4 can be alkyl or hydroxy substituted or perfluorinated alkyl of from 1 to about 22 carbon atoms and the hydroxy-substituted derivative thereof;
- B represents an amide group, wherein R.sub.6 independently represents lower alkyl or hydroxy-substituted alkyl from 1 to about 6 carbons or hydrogen;
- R.sub.2 can independently represent C.sub.1 to about C.sub.10 alkylene and the hydroxy-substituted derivatives thereof, an amide group, a polyether group or R.sub.8 --D.sub.1 --R.sub.8 wherein R.sub.6 has been hereinbefore defined and R.sub.7 independently represents about C.sub.2 to about C.sub.4 alkyl with x being a number between 1 and 20 and R.sub.8 can independently be C.sub.1 to about C.sub.6 alkylene and the hydroxy-substituted derivatives thereof and D.sub.1 represents --O--, --S--, an amide group or --N(R.sub.9)-- wherein R.sub.9 independently represents C.sub.1 to about C.sub.12 alkyl and the hydroxy-substituted derivatives thereof or hydrogen;
- R.sub.3 can independently be alkylene or alkylaryl of 1 to about 10 carbon atoms and the hydroxy-substituted derivatives thereof or R.sub.10 --D.sub.2 --R.sub.10 wherein R.sub.10 can independently be alkylene of from 1 to about 6 carbon atoms and the hydroxy-substituted derivatives thereof as well as aryl, and D.sub.2 represents --O--, --S--, --SO.sub.2 --, a carbonyl group, a polyether group, or aryl wherein R.sub.11 represents a carbon chain of from 1 to about 12 carbon atoms and the hydroxy-substituted derivatives thereof or hydrogen, R.sub.7 being as defined hereinabove with x being a number between 1 and 20 and z is a number from 1 to about 4;
- "A" independently represents --N.dbd. and Y independently represents hydrogen, --SO.sub.3 H, --OSO.sub.3 H, --OP(O)(OH).sub.2, --P(O)(OH).sub.2, --COOH, --CO.sub.2 --C.sub.6 H.sub.4 --SO.sub.3 H and the salts thereof.
2 more elements
Dependencies are inferred from the claim text.