发明名称 |
PRODUCTION OF PAPER, BOARD AND CARDBOARD IN THE PRESENCE OF COPOLYMERS CONTAINING N-VINYLFORMAMIDE UNITS |
摘要 |
Paper, board and cardboard are produced by draining a paper stock in the presence of a nonhydrolyzed copolymer which contains, as polymerized units, a) from 99 to 1 mol % of N-vinylformamide and (b) from 1 to 99 mol % of one or more water-soluble basic monomers of the formula (I) or (II) where R1 is H, CH3 or C2H5, R2, R3 and R4 are each H, CH3, C2H5 or (-CH2-CH2-O-)nH, R5 and R6 are each C1-C10-alkyl, A is C1-C6-alkylene, n is from 1 to 6 and Y6 is an anion, in an amount of from 0.01 to 3.5% by weight, based on dry paper stock.
|
申请公布号 |
CA2030540(A1) |
申请公布日期 |
1990.09.19 |
申请号 |
CA19902030540 |
申请日期 |
1990.03.14 |
申请人 |
MOENCH, DIETMAR;HARTMANN, HEINRICH;FREUDENBERG, ENRIQUE;STANGE, ANDREAS |
发明人 |
MOENCH, DIETMAR;HARTMANN, HEINRICH;FREUDENBERG, ENRIQUE;STANGE, ANDREAS |
分类号 |
D21H17/34;D21H17/45;D21H21/06;D21H21/10;(IPC1-7):D21H17/45 |
主分类号 |
D21H17/34 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|