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1.发明授权Method of improving the drainage of cellulose fiber suspensions with polymers of n-vinyl-n-methyl-formamide 失效用N-乙烯基-N-甲基 - 酰胺聚合物改进纤维素纤维悬浮液排出的方法
公开(公告)号：US3597314A
公开(公告)日：1971-08-03
申请号：US3597314D
申请日：1968-11-27
Applicant: HOECHST AG
Inventor： LAUBE KARLHEINZ , ULMSCHNEIDER DIETER , NISCHWITH EHRENFRIED
CPC classification number: D21H17/45
Abstract: DEWATERING OF AQUEOUS CELLULOSE FIBER SUSPENSION IN THE FORMATION OF PAPER IS IMPROVED BY ADDING TO THE SUSPENSION FROM 0.05 TO 4% OF A WATER SOLUBLE POLYMER CONSISTING ESSENTIALLY OF UNITS DERIVED FROM N-VINYL-N-METHYLFORMAMIDE, SUCH AS N-VINYL-N-METHYL FORMAMIDE, HAVING 60-100% OF THE FORMIC ACID RADICALS OF THE POLYMER SPLIT OFF BY ACID HYDROLYSIS.
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