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).
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 dimethylamine-epichlorohydrin polymer together with a second polymer selected from a group consisting of copolymers of acrylamide with (1) acrylic acid, (2) sodium acrylate, (3) dimethylamino ethyl methacrylate quaternary salt wherein the dosage to broke liquid is 0.96-16.8 lbs/ton of the dimethylamine epichlorohydrin polymer together with 0.14-2.24 lbs/ton of acrylamide copolymer, both dosages being based on dry weight of starch.
Claim 2
Independent Claim
89 words
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 dimethylamine-epichlorohydrin polymer together with a second polymer selected from a group consisting of copolymers of acrylamide with (1) acrylic acid, (2) sodium acrylate, (3) dimethylamino ethyl methacrylate quaternary salt wherein the dosage to broke liquid is 0.96-16.8 lbs/ton of the dimethylamine epichlorohydrin polymer together with 0.14-2.24 lbs/ton of acrylamide copolymer, both dosages being based on dry weight of starch.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the quaternary salt is dimethyl sulfate.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein the starch is oxidized starch.
Claim 5
Dependent Claim
32 words
The method of claim 1 wherein said second polymer is a copolymer of acrylamide/sodium acrylate which is a water-in-oil emulsion containing about 28% copolymer and contains from 5% to 30% acrylic acid.
Claim 6
Dependent Claim
27 words
The method of claim 1 wherein said polymer is a copolymer of 50% acrylamide and 50% acrylic acid which is a water-in-oil emulsion containing about 28% copolymer.
Claim 7
Dependent Claim
26 words
The method of claim 1 wherein said second polymer is a copolymer of polyacrylamide/dimethylamino ethyl methacrylate quaternary which is a water-in-oil emulsion containing about 28% copolymer.