公开(公告)号：DE1720262A1

公开(公告)日：1971-06-09

申请号：DE1720262

申请日：1967-02-11

Applicant: BASF AG

Inventor： STAIGER GERHARD DR ,  STEDEFEDER JOACHIM DR

IPC: C08F4/64 ,  C08F10/00 ,  C08F3/02

公开(公告)号：AT266437B

公开(公告)日：1968-11-11

申请号：AT1069466

申请日：1966-11-18

Applicant: BASF AG

Inventor： STEDEFEDER JOACHIM DR

IPC: C08F236/06

公开(公告)号：DE2316561A1

公开(公告)日：1974-11-07

申请号：DE2316561

申请日：1973-04-03

Applicant: BASF AG

Inventor： STEDEFEDER JOACHIM DR ,  SRNA CHRISTIAN DR ,  PERNER JOHANNES DR ,  LINKE WOLFGANG DR

IPC: C08F218/00 ,  A61K8/81 ,  A61Q5/02 ,  A61Q5/06 ,  C08F218/02 ,  C08F218/04 ,  C08F220/00 ,  C08F220/04 ,  C08F220/26 ,  C08F15/40

公开(公告)号：DE1720329A1

公开(公告)日：1971-06-16

申请号：DE1720329

申请日：1967-11-30

Applicant: BASF AG

Inventor： STAIGER GERHARD DR ,  STEDEFEDER JOACHIM DR

IPC: C08F10/00 ,  C08F3/02

公开(公告)号：DE3060860D1

公开(公告)日：1982-11-04

申请号：DE3060860

申请日：1980-01-22

Applicant: BASF AG

Inventor： HARTMANN JUERGEN DR ,  STEDEFEDER JOACHIM DR ,  DENZINGER WALTER ,  PFOHL SIGBERG 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：CH623973B5

公开(公告)日：1982-01-15

申请号：CH350678

申请日：1978-03-31

Applicant: BASF AG

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

IPC: C08F220/00 ,  C08F220/04 ,  C08F220/06 ,  C08F220/42 ,  D06M15/263 ,  D06M15/285 ,  D06M15/14

公开(公告)号：AT230090B

公开(公告)日：1963-11-11

申请号：AT684161

申请日：1961-09-07

Applicant: BASF AG

Inventor： STEDEFEDER JOACHIM DR ,  LAUTENSCHLAGER HANS DR

公开(公告)号：DE3065385D1

公开(公告)日：1983-11-24

申请号：DE3065385

申请日：1980-10-10

Applicant: BASF AG

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

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

公开(公告)号：CH637714A5

公开(公告)日：1983-08-15

申请号：CH956278

申请日：1978-09-13

Applicant: BASF AG

Inventor： STEDEFEDER JOACHIM DR ,  GUENDER WOLF DR ,  PFOHL SIGBERG DR

IPC: D21H19/20 ,  D21H17/43 ,  D21H1/38 ,  D21H5/00

公开(公告)号：DE2058122A1

公开(公告)日：1972-05-31

申请号：DE2058122

申请日：1970-11-26

Applicant: BASF AG

Inventor： HERBECK RUDOLF DR ,  SCHOLL RICHARD ,  STAIGER GERHARD DR ,  STEDEFEDER JOACHIM DR ,  WISSEROTH KARL DR

IPC: C08F10/06 ,  C08F110/06 ,  C08F3/10

Abstract: Propylene opt. together with other monomers is polymerised in the gas phase in presence of Ziegler catalysts by introducing liquid propylene into the reaction zone, vaporising and polymerising, at catalyst activity is not 3000 pts. polymer/pt. catalyst-hr, using catalyst with molar ratio of Ti to al cpd. in 1:0.5-6 range, as in DT1720292, the process being modified by carrying out continuous polymerisation in presence of H2 as mol. wt. regulator and using mixt. of AlEt3 and AlEt2Cl in 4-1:1 molar ratio as reducing component of the Ziegler catalyst. This process can be used to produce polymer with intrinsic viscosity 3, i.e. 1.8-3.0 dl/g. in free-running, powder form, which can be processed conveniently in the fused state.