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:
Mar. 25, 1997
Filed:
Mar. 26, 1996
Applicant:
Inventor:
Edward T Shawl, Wallingford, PA (US);
Assignee:
ARCO Chemical Technology, L.P., Greenville, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
106823 ; 106728 ; 106810 ; 524-5 ; 524558 ; 526318 ; 526332 ;
Abstract
Substances useful as water reducing and superplasticizer additives for cement compositions are formed by reaction of carboxylic acid polymers with polyethers of C.sub.2 -C.sub.4 epoxides wherein partial cleavage of the polyether and esterification of the polyether and the cleavage products thereof by the other reactant are achieved. In one embodiment, a sulfonic acid is used to catalyze the reaction of poly(acrylic acid) and a monofunctional ethylene oxide-propylene oxide copolymer at a temperature in excess of 140.degree. C.