The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 08, 1998
Filed:
Jun. 09, 1997
David James Tracy, Plainsboro, NJ (US);
Ruoxin Li, Plainsboro, NJ (US);
Jiang Yang, Hightstown, NJ (US);
Rhodia Inc., Cranbury, NJ (US);
Abstract
A novel class of nonionic gemini surfactants and methods for their preparation consist of compounds with three hydrophilic heads and two lipophilic tails of the general formula: ##STR1## wherein R.sub.1 and R.sub.3 independently represents a C.sub.1 to C.sub.22 straight or branched chain alkyl, alkylene, aryl or alkylaryl, or hydrogen, with the proviso that both cannot be hydrogen; R.sub.2 represents a C.sub.1 to C.sub.5 straight or branched chain alkyl, alkylene or hydrogen, (Y) represents ##STR2## wherein R.sub.4 represents C.sub.1 to C.sub.3 alkyl or hydrogen and may be the same or different; X represents --(CH.sub.2).sub.a -- wherein a is a whole number of from 1 to 5; --S--, --S--S--, --SO.sub.2, --(CH.sub.2).sub.a SO.sub.2 (CH.sub.2).sub.a --,--O--, --C.dbd.O, or --CH.sub.2 --NR--CH.sub.2 -- wherein R is a C.sub.1 to C.sub.3 straight or branched chain alkyl, alkylene or hydrogen and x, y, and z are whole numbers of from about 6 to about 300. The surfactants exhibit excellent surface active functionality, low cmc and pC.sub.20 values and provide superior efficacies when combined with conventional single chain surfactants.