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:
Jul. 18, 2000
Filed:
Aug. 07, 1996
Showa Denko K.K., Tokyo, JP;
Abstract
A high-flow concrete additive comprises a polymer of 10-100 wt % of an N-vinylacetamide, 0-50 wt % of a compound CH.sub.2 .dbd.CR.sup.3 X.sup.1 R.sup.4 SO.sub.3 X.sup.2 wherein R.sup.3 is hydrogen or methyl, R.sup.4 is alkylene of 1 to 4 carbon atoms, X.sup.1 is CONH or COO, and X.sup.2 is hydrogen, an alkali metal, ammonium salt or organic ammonium salt, and 0-40 wt % of a compound CH.sub.2 .dbd.CR.sup.5 X.sup.3 wherein R.sup.5 is hydrogen or methyl and X.sup.3 is CN, COOR.sup.6, CONH.sub.2, CONHR.sup.7, CONR.sup.8 R.sup.9, COR.sup.10, OCOR.sup.11 or OR.sup.12, in which R.sup.6 is hydrogen, an alkali metal, ammonium salt, organic ammonium salt or alkyl group of 1 to 4 carbon atoms, R.sup.7, R.sup.8 and R.sup.9 are alkyl groups of 1 to 4 carbon atoms, and R.sup.10, R.sup.11 and R.sup.12 are alkyl groups of 1 to 4 carbon atoms.