Method of sizing polyester yarn
AssigneeRohm and Haas Company
InventorHal C. Morris
Life of this patent
Estimating the term…
Abstract
Taught is a method of sizing polyester yarn for weaving comprising the steps of applying thereto a latex having an acid pH and of a free radical initiated vinyl polymer having a weight average molecular weight of from about 300,000 to about 2,500,000, said polymer in dried film form being hydrophobic and not redispersible in a solution at a pH of from about 2 to 7 but redispersible by an aqueous alkaline medium, said polymer being prepared from monomers consisting essentially of by weight, 45-65% butyl acrylate a total of 28-45% styrene and/or methyl methacrylate and a total of 8-14% acrylic acid and/or methacrylic acid, and drying the yarn.
Claims12
A method of sizing polyester yarn for weaving comprising the steps of (1) applying thereto a free radical initiated vinyl polymer latex having an acid pH and a weight average molecular weight from about 300,000 to 2,500,000;
- said polymer in dried film form being hydrophobic and not redispersible in a solution at a pH from about 2 to 7 but redispersible by an aqueous alkaline medium, said polymer being prepared from monomers consisting essentially of, by weight, 45 to 65% butyl acrylate, 28 to 45% styrene and/or methyl methacrylate, and 8 to 14% acrylic acid and/or methacrylic and (2) drying the yarn.
Dependencies are inferred from the claim text.