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. 19, 1981
Filed:
May. 30, 1979
David R Cosper, Downers Grove, IL (US);
Patricia R Soll, Buffalo Grove, IL (US);
Nalco Chemical Company, Oak Brook, IL (US);
Abstract
This invention is a method of increasing the amount of retention of deposited starch and pigment on fibers in broke liquid which consists of adding to said liquid a combination dosage of a DMA-epichlorohydrin polymer together with a second polymer consisting of acrylamide/acrylate. Such a polymer may be anionic, such as an acrylamide/sodium acrylate 5% or 30% acrylic acid, or it may be cationic, such as acrylamide/dimethylamino ethyl methacrylate dimethyl sulfate quaternary. The polymers may be applied to the broke directly and preferably in the form of an inverted water-in-oil emulsion. The dosage based on dry weight of starch (T) ranges from 2-35 lbs/T of the DMA-epichlorohydrin polymer product (48% polymer, 0.96-16.8 lbs/T polymer) and 0.5-8 lbs/T based on the second polymer product (28% polymer, 0.14-2.24 lbs/T polymer) selected from the group consisting of copolymers of acrylamide/acrylic acid; copolymers of acrylamide/alkali metal acrylate (e.g., sodium acrylate); copolymers of acrylamide/dimethylamino ethyl methacrylate dimethyl sulfate quaternary (DMAEM.DMS quat).