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:
May. 12, 1992
Filed:
Aug. 08, 1991
Michael C Welch, Woodhaven, MI (US);
Rudolph E Lisa, Grosse Ile, MI (US);
Joe C Wilson, Woodhaven, MI (US);
BASF Corporation, Parsippany, NJ (US);
Abstract
This invention relates to a process for preparing a sulfophenylalkylsiloxane or a sulfonaphthylalkylsiloxane having either of the following formulae: ##STR1## (a) adding an essentially equimolar ratio of chlorosulfonic acid to a phenylalkyltrichlorosilane or a naphthylalkyltrichlorosilane having either of the following formulae: ##STR2## wherein R of formulae I, II, III, and IV is individually hydrogen, halogen, or an alkyl radical having 1 to 4 carbon atoms; R.sub.1 is an alkylene radical having 2 to 5 carbon atoms; R.sub.2 is R or ##STR3## with the proviso that at least one R.sub.2 be ##STR4## R.sub.3 is --H or ##STR5## with the proviso that at least one R.sub.3 be ##STR6## R.sub.4 is R or --R.sub.1 SiCl.sub.3 with the proviso that at least one R.sub.4 be --R.sub.1 SiCl.sub.3 and