C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 69/48 (2006.01) C08G 69/30 (2006.01) C08G 73/02 (2006.01) D21H 17/54 (2006.01) D21H 21/20 (2006.01)
Patent
CA 2328842
A water-soluble thermosetting resin giving high wet-strength of paper and excellent preservation stability which comprises 20 % by weight or less of components having a molecular weight of 10,000 or less: and a water-soluble thermosetting resin giving high wet-strength of paper in which, in a reverse mutation test carried out for the resinas the object to be tested using histidine-requiring Salmonella typhimurium TA1535 strain, the number of reversant colonies generated is less than twice the number of reversant colonies in the solvent control, treated only the solvent as a reference liquid, are provided: and a process for producing an aqueous cationic thermosetting resin solution giving excellent preservation stability of the solution which comprises a step of reacting polyamidepolyamine and epihalohydrin, and a step wherein the solution obtained by reacting polyamidepolyamine and epihalohydrin is held at a temperature of about 30 to about 70°C for a period, while adjusting the pH to about 2 to about 3.8 is also provided.
Asano Satoshi
Kurumatani Masahiko
Ota Mika
Yamamoto Satoshi
Yoshida Yoshifumi
Marks & Clerk
Sumitomo Chemical Co. Ltd.
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