Method of improving wet tensile strength of paper

Details Method of improving wet tensile strength of paper Method of improving wet tensile strength of paper

D - Textiles, Paper

21

H

9/56

D21H 17/57 (2006.01) C08G 18/08 (2006.01) C08G 18/12 (2006.01)

Patent

CA 1187659

ABSTRACT OF THE DISCLOSURE Method and composition for improving the wet tensile strength of paper. The method involves treating paper pulp with pH-adjusted polyurethane prepolymer amine salt and then producing paper from the treated pulp. The polyurethane prepolymer amine salt has an unadjusted pH of about 3.5-5.5. After adjustment, the pH of the amine salt can range from 6.0 to 9Ø

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