Process for producing sized paper and cardboard with...

Details Process for producing sized paper and cardboard with... Process for producing sized paper and cardboard with...

D - Textiles, Paper

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D21H 17/55 (2006.01) D21H 23/10 (2006.01) D21H 23/76 (2006.01)

Patent

CA 1126910

Case 1-11308/+ Canada PROCESS FOR PRODUCING SIZED PAPER AND CARDBOARD WITH POLYELECTROLYTES AND EPOXIDE-AMINE-POLYAMIDE REACTION PRODUCTS Abstract of the Disclosure A process for producing paper or cardboard sized in the pulp with epoxide-amine-polyamide reaction products is disclosed. This process comprises adding to the fibre suspension, which has a pH value of 5 to 8, (A) at least one water-soluble higher molecular poly- electrolyte, which is cationic if the pH value of the fibre suspension is 6.5 to 8 and anionic if the pH value of the fibre suspension is 5 to 7, followed by (B) at least one water-soluble or water-dispersible salt of an epoxide-amine-polyamide reaction product, and further processing the fibre suspension into the form of paper or cardboard.

309945

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