公开(公告)号：DE2941978A1

公开(公告)日：1981-04-30

申请号：DE2941978

申请日：1979-10-17

Applicant: BASF AG

Inventor： MESSMER KARLHEINZ DIPL CHEM DR ,  STEDEFEDER JOACHIM DIPL CHEM D ,  FISCHER HERMANN DIPL CHEM DR ,  HARTMANN HEINRICH DIPL CHEM DR

IPC: C08F2/00 ,  C08F2/06 ,  C08F2/14 ,  C08F2/34

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：DE2636243A1

公开(公告)日：1978-02-16

申请号：DE2636243

申请日：1976-08-12

Applicant: BASF AG

Inventor： KAST BERND DIPL ING ,  STEDEFEDER JOACHIM DIPL CHEM D ,  SANNER AXEL DIPL CHEM DR ,  SCHENCK HANS-UWE DIPL CHEM DR ,  THOMA RICHARD DIPL ING DR ,  FISCHER HERMANN DIPL CHEM DR

IPC: C08F2/00 ,  C08F2/16 ,  C08F291/00 ,  C08F20/56 ,  C08F20/18

公开(公告)号：DE2714897A1

公开(公告)日：1978-10-05

申请号：DE2714897

申请日：1977-04-02

Applicant: BASF AG

Inventor： SCHENK WOLFGANG DIPL CHEM DR ,  STEDEFEDER JOACHIM DIPL CHEM D ,  LEITNER HEINZ ,  SCHENCK HANS-UWE DIPL CHEM DR

IPC: C08F220/00 ,  C08F220/04 ,  C08F220/06 ,  C08F220/42 ,  D06M15/263 ,  D06M15/285 ,  D06M15/38

Abstract: A process for sizing staple fiber yarns by applying an aqueous sizing liquor which contains an alkaline earth metal salt of a copolymer containing from 90 to 30% by weight of acrylic acid and/or methacrylic acid and from 10 to 70% by weight of acrylonitrile and/or methacrylonitrile, which copolymer has a viscosity of from 50 to 1,000 cp in 15% strength aqueous solution at 85 DEG C., and drying the treated yarns. The sized films obtained are moisture-insensitive and have good heat stability.

公开(公告)号：DE2622463A1

公开(公告)日：1977-12-08

申请号：DE2622463

申请日：1976-05-20

Applicant: BASF AG

Inventor： STEDEFEDER JOACHIM DIPL CHEM D ,  DORN INGO H DIPL CHEM DR ,  KUHN HORST ,  KASTENHUBER WALTER ING GRAD ,  LINKE WOLFGANG DIPL CHEM DR

IPC: C08F6/00 ,  C08F6/24 ,  C08F20/04

Abstract: Copolymers of crotonic acid are purified, to remove monomeric crotonic acid, by extracting the copolymers with water at from 50 DEG to 120 DEG C and stirring the system, the flow energy of the water and the energy of stirring being chosen so that the polymer particles just remain suspended.