公开(公告)号：DE2903218A1

公开(公告)日：1980-08-07

申请号：DE2903218

申请日：1979-01-27

Applicant: BASF AG

Inventor： HARTMANN JUERGEN DIPL CHEM DR ,  STEDEFEDER JOACHIM DIPL CHEM D ,  DENZINGER WALTER ,  PFOHL SIGBERG DIPL CHEM DR

IPC: D21H19/20 ,  D21H17/43 ,  D21H3/38

Abstract: A process for the manufacture of paper having a high dry strength and a low wet strength, by treating the surface of the paper with an aqueous solution of an alkali metal and/or alkaline earth metal salt of a polymer of (a) from 91 to 100% by weight of acrylic acid and/or methacrylic acid and (b) from 0 to 9% by weight of acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, vinyl acetate, maleic anhydride, diisobutylene, an ester of acrylic acid and/or an ester of methacrylic acid, which has a viscosity of from 5 to 100 mPas in 2% strength aqueous solution at 20 DEG C., and drying the impregnated paper. The polymer is generally employed in an amount of from 1 to 4% by weight, based on dry paper, and increases the dry strength of the paper without substantially increasing the wet strength.

公开(公告)号：DE3135279A1

公开(公告)日：1983-03-24

申请号：DE3135279

申请日：1981-09-05

Applicant: BASF AG

Inventor： BURKERT HANS DIPL CHEM DR ,  HARTMANN JUERGEN DIPL CHEM DR ,  JUNG DIETMAR DIPL CHEM DR ,  HEIDE WILFRIED DIPL CHEM DR ,  HARTMANN HEINRICH DIPL CHEM DR ,  SPOOR HERBERT DIPL CHEM DR

IPC: C02F1/54 ,  C08F20/34 ,  D21H17/37 ,  D21H17/42 ,  D21H17/43 ,  D21H17/45 ,  C02F1/56 ,  B01D21/01 ,  C02F11/14

Abstract: Use of water-soluble homopolymers of di-C1- to C3-alkylaminoneopentyl (meth)acrylates in neutral or quaternary form and/or of water-soluble copolymers which contain at least 5% by weight of copolymerised di-C1- to C3-alkylaminoneopentyl (meth)acrylate in neutral or quaternary form and which each have a K value of 150 to 300, as flocculants for waste waters (effluents) and sludges.

公开(公告)号：DE3124011A1

公开(公告)日：1982-12-30

申请号：DE3124011

申请日：1981-06-19

Applicant: BASF AG

Inventor： LINHART FRIEDRICH DIPL CHEM DR ,  HARTMANN JUERGEN DIPL CHEM DR ,  JUNG DIETMAR DIPL CHEM DR ,  HARTMANN HEINRICH DIPL CHEM DR ,  SPOOR HERBERT DIPL CHEM DR

IPC: B01D21/01 ,  C02F1/54 ,  C08F20/00 ,  C08F20/10 ,  C08F20/34 ,  D21H17/37 ,  D21H17/42 ,  D21H17/43 ,  D21H17/45 ,  C08F120/34 ,  D21H3/38

Abstract: Water-soluble homopolymers and copolymers of di-C1-C3-alkylaminoneopentyl (meth)acrylates, the homopolymers and copolymers having a K value of from 150 to 300, are used as retention agents, drainage agents and flocculants in papermaking. Increased retention, drainage rate and flocculation are achieved in comparison with the conventional basic polyacrylates.