MANUFACTURE OF PAPER, PAPER BOARD AND BOXBOARD

    公开(公告)号:JPH05106193A

    公开(公告)日:1993-04-27

    申请号:JP260691

    申请日:1991-01-14

    Applicant: BASF AG

    Abstract: PURPOSE: To obtain paper, board and cardboard from which a product having good retention, coagulation and dehydration is formed by draining a paper stock contg. undesirable substances in the presence of a specified fixing agent and a cationic retention aid. CONSTITUTION: A paper stock contg. undesirable substances (such as unbleached pulp) is polymerized with up to 90 molar % of an ethylenic unsatd. monomer from the group of vinyl acetate, vinyl propionate, 1-4C alkyl vinyl ether, N- vinylpyrrolidone, ester, nitrile, and acrylic or methacrylic amide. The paper stock is drained in the presence of the introduced N-vinylformamide homo- and/or co-polymer (preferably with a K value of 60-90) having a hydrolytic degree of not less than 60% (preferably 70-100%) as a fixing agent and preferably a cationic retention aid such as polydiallyldimethyl ammonium chloride, to obtain the objective paper.

Patent Agency Ranking