Nonionic gemini surfactants

US6204297A · kind A · utility

Assignee

• Rhodia, Inc. · US

Inventors

• David J. Tracy · Plainsboro, US
• Ruoxin Li · Plainsboro, US
• Manilal S. Dahanayake · Princeton, US
• Jiang Yang · Missouri City, US

Key dates

• Filing date: Nov 26, 1996
• Grant date: Mar 20, 2001
• Expiry date: Nov 26, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S516/92
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Novel nonionic gemini surfactants are extremely effective emulsifiers for oil-in-water emulsions that provide improved detergency at even low concentration levels. The surfactants are characterized by the formula: ##STR1## wherein R.sub.1 is independently H or a C.sub.1 to C.sub.22 alkyl, R.sub.2 is H or C.sub.1 to C.sub.22 alkyl and R3 is D.sub.1 --R.sub.4 --D.sub.1 or R.sub.4 --D.sub.1 --R.sub.4 wherein R.sub.4 is independently a C.sub.1 -C.sub.10 alkyl group, --C(O)--, --R.sub.5 [O(EO).sub.a (PO).sub.b ]--, --O--R.sub.5 --O--, or aryl, e.g. phenyl, and D.sub.1 is independently --O--, --S--, --S--S--, --SO.sub.2 --, --C(O)--, a polyether group [--O(EO).sub.a (PO).sub.b --], an amide group [--C(O)N(R.sub.6)--], an amino group [--N(R.sub.6)--], --O--R.sub.5 --O--, or aryl. (EO).sub.a (PO).sub.b is a polyether group and Z is a C.sub.1 -C.sub.4 alkyl, or an alkylaryl or hydrogen wherein EO represents ethyleneoxy radicals, PO represents propyleneoxy radicals, a and b are numbers of from 0 to 100, a is preferably from about 0 to about 30 and b is preferably from about 0 to 10, wherein a plus b is at least one, and the EO and PO alkyl or alkylaryl.