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. 27, 1994
Filed:
May. 22, 1992
Applicant:
Inventors:
Elizabeth A Kerr, Knutsford, GB;
Jan Rideout, Bolton, GB;
Assignee:
FMC Corporation (UK) Limited, Manchester, GB;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; C08F / ;
U.S. Cl.
CPC ...
525340 ; 525367 ; 5253278 ; 5253285 ; 5253298 ; 5253302 ; 5253268 ; 5253266 ; 5253282 ; 5253288 ; 5253289 ; 5253294 ; 5253295 ; 5253296 ; 5253273 ; 5253306 ; 5253333 ; 526193 ; 526208 ; 526233 ; 526287 ; 5263171 ; 526240 ; 5263185 ; 526271 ; 562-8 ; 562 24 ;
Abstract
Phosphonic (co) telomers of the type described in U.S. Pat. Nos. 4,046,707 and 4,681,686 and European Patent Application 360746 may be produced by an aqueous process comprising (a) reacting hypophosphorous acid with a carbonyl compound which is preferably an aldehyde, a ketone or an imine, (b) reacting the product of (a) with an olefin or olefins in the presence of a suitable initiator especially a free radical initiator, and (c) converting the product obtained from (b) to a phosphonic (co) telomer, e.g., by reaction with hypochlorite. The (co) telomer products are useful as scale inhibitors in aqueous systems.