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. 19, 2002
Filed:
Nov. 18, 1999
Applicant:
Inventors:
John Bernard Clarke, West Yorkshire, GB;
Christopher Robert Walker, West Yorkshire, GB;
Assignee:
Ciba Specialty Chemicals Water Treatments Ltd., Bradford, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D 7/02 ; C09D 5/02 ;
U.S. Cl.
CPC ...
C09D 7/02 ; C09D 5/02 ;
Abstract
A pigment dispersant, for instance for incorporation in an emulsion paint containing non-reactive or reactive pigment, is a water-soluble copolymer of monomer units derived from two or more monomers of the formula CH ═CR —COOR wherein R is methyl in 75 to 85 mol % of the monomer units and is hydrogen in the remainder, and R is hydrogen or a cation in 75 to 85 mol % of the monomer units and is C alkyl in the remainder of the monomer units and wherein at least 80% of the R alkyl groups are butyl groups.