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:
Sep. 14, 1999
Filed:
Nov. 26, 1997
Ruoxin Li, Plainsboro, NJ (US);
David James Tracy, Plainsboro, NJ (US);
Rhodia Inc., Cranbury, NJ (US);
Abstract
The present invention comprises a new, improved class of anionic gemini surfactants consisting of two hydrophilic groups and two hydrophobic moieties joined by a bridge that possess improved surfactant functionalities yet may be characterized as mild for use in personal care products and environmentally benign. These compounds may be represented by the general structural formula as follows: ##STR1## wherein R, R.sub.1, R.sub.2, and R.sub.3 are selected from the group consisting of straight or branched chain C.sub.1 to C.sub.22 alkyl, aryl or hydrogen, and each R moiety can be the same or different; R.sub.4 and R.sub.5 are selected from the group comprising a straight or branched chain C.sub.1 to C.sub.6 alkyl with the further proviso that when either is a C.sub.6 it may exist as a cyclohexyl ring; R.sub.6 and R.sub.7 are selected from the group consisting of straight or branched chain C.sub.2 to C.sub.6 alkyl or aryl with the further proviso that R.sub.6 and R.sub.7 may be the same or different and wherein X is selected from the group comprising --S--, --S--S--, --D.sub.1 --R.sub.8 --D-- or --R.sub.8 --D.sub.1 --R.sub.8 -- wherein R.sub.8 is a straight or branched chain C.sub.1 to C.sub.10 alkyl or aryl and D.sub.1 is selected from the group consisting of --O--, --S--, --S--S--, --SO.sub.2 --; Y is --PO.sub.4 or --SO.sub.3 and can be the same or different and Z is selected from the group consisting of Na, K, alkali or alkaline earth metals, ammonium, their salts and mixtures thereof.