发明名称 |
Process for manufacture of paper |
摘要 |
A process for the manufacture of paper from pulp employs at least one graft copolymer of starch selected from the group consisting of starch graft-polymethacrylic acid, starch graft-polyacrylic acid, cationic starch graft-polymethacrylic acid and cationic starch graft-polyacrylic acid as a wet-end additive. The graft copolymer preferably has an add on amount of acid of from about 0.1 to about 50% based on the weight of the starch, and is typically added to cellulosic pulp in an amount of from about 0.1 to about 10% based on the weight of the pulp. Such wet-end additives are also useful in processes involving relatively high alum levels of up to about 15 or 25%, based on the weight of the pulp.
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申请公布号 |
US5294301(A) |
申请公布日期 |
1994.03.15 |
申请号 |
US19920889861 |
申请日期 |
1992.05.28 |
申请人 |
NATIONAL STARCH AND CHEMICAL INVESTMENT HOLDING CORPORATION |
发明人 |
KUMAR, VELAYUDHAN N. G.;JOBE, PATRICK G. |
分类号 |
D21H17/28;D21H17/37;(IPC1-7):D21H17/28 |
主分类号 |
D21H17/28 |
代理机构 |
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地址 |
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