公开(公告)号：AT225502T

公开(公告)日：2002-10-15

申请号：AT98114022

申请日：1998-07-27

Applicant: BASF AG

Inventor： WILLENBACHER NORBERT DR ,  HANCIOGULLARI HARUTYUN DR ,  RAEDLE MATTHIAS DR ,  ETTMUELLER JUERGEN

IPC: G01N11/14 ,  G01N33/26 ,  G01N33/32 ,  G01N33/34

Abstract: In a proposed method for determining the immobilization of a colloidal coating dispersion which is applied to a porous substrate, the colloidal coating dispersion is applied to the porous substrate which forms a bounding surface of the measuring gap of a rheometer, and the change in the viscosity as a function of time is measured. The method is particularly suitable for measuring the immobilization of a paper coating slip on base paper.

公开(公告)号：DE4445140A1

公开(公告)日：1996-06-20

申请号：DE4445140

申请日：1994-12-17

Applicant: BASF AG

Inventor： NIESNER NORBERT DR ,  SKUPIN GABRIEL ,  DUESTER ERICH ,  LOTH WOLFGANG DR ,  HOVE ARNOLD VAN DEN ,  WILLENBACHER NORBERT DR ,  HENN ROLF DR

IPC: C08J9/12 ,  B29C67/20

Abstract: The invention pertains to a styrene polymer foam produced from a styrene homo- or copolymer that is foamed by extrusion and optionally processed further and a foaming agent that consists essentially of carbon dioxide, and containing impact-resistant polystyrene.

公开(公告)号：DE19601695A1

公开(公告)日：1997-07-24

申请号：DE19601695

申请日：1996-01-18

Applicant: BASF AG

Inventor： WILLENBACHER NORBERT DR ,  WAGNER NORMAN PROF DR

IPC: G01N29/032 ,  G01N15/10 ,  G01N27/60

Abstract: The process is used to determine the high frequency limiting value of the dynamic storage modulus of dispersions of charged colloidal particles. The determination is carried out at a given dispersive medium viscosity. The medium may include electrolyte solutions, emulsions and optionally soluble polymers with given volume concentrations of dispersed particles. A torsion resonator is oscillated at given frequency and the damping is measured. The dynamic storage modulus is determined solely from the damping, caused by the dispersion immediately surrounding the resonator. Also claimed are corresponding devices for measuring the cited modulus, the use of the signal developed in process control, and several related processes and devices for determining the surface charge of dispersion particles at given viscosity of the dispersant.

公开(公告)号：DE19732877A1

公开(公告)日：1999-02-04

申请号：DE19732877

申请日：1997-07-30

Applicant: BASF AG

Inventor： WILLENBACHER NORBERT DR ,  HANCIOGULLARI HARUTYUN DR ,  RAEDLE MATTHIAS DR ,  ETTMUELLER JUERGEN

IPC: G01N11/14 ,  G01N33/26 ,  G01N33/32 ,  G01N33/34 ,  G01N11/00 ,  G01N21/47 ,  C09J5/00

Abstract: To determine the immobilising of a colloid dispersion on application to a porous substrate, a rheometer is formed at the limit surface of a measurement gap where the colloid coating dispersion (9) has been applied on to the porous substrate (5). The times of viscosity changes are measured.

公开(公告)号：DE59805773D1

公开(公告)日：2002-11-07

申请号：DE59805773

申请日：1998-07-27

Applicant: BASF AG

Inventor： WILLENBACHER NORBERT DR ,  HANCIOGULLARI HARUTYUN DR ,  RAEDLE MATTHIAS DR ,  ETTMUELLER JUERGEN

IPC: G01N11/14 ,  G01N33/26 ,  G01N33/32 ,  G01N33/34

Abstract: In a proposed method for determining the immobilization of a colloidal coating dispersion which is applied to a porous substrate, the colloidal coating dispersion is applied to the porous substrate which forms a bounding surface of the measuring gap of a rheometer, and the change in the viscosity as a function of time is measured. The method is particularly suitable for measuring the immobilization of a paper coating slip on base paper.