Production of paper, board and cardboard from paper stocks conta

Details Production of paper, board and cardboard from paper stocks conta Production of paper, board and cardboard from paper stocks conta

1991-01-09

1992-03-24

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621646, D21H 1745

Patent

active

050985213

ABSTRACT:
Paper, board and cardboard are produced from paper stocks containing foreign substances by drainage in the presence of a polymer which contains, as typical polymerized constituents, units of the formulae ##STR1## where R.sup.1 and R.sup.2 are each H, C.sub.1 -C.sub.3 -alkyl, and which have K values of not less than 130, the polymers containing less than 10 mol % of units of the formula II.

REFERENCES:
patent: 4421602 (1983-12-01), Brunnmueller et al.
patent: 4772359 (1988-09-01), Linhart et al.

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