公开(公告)号：DE58900872D1

公开(公告)日：1992-04-02

申请号：DE58900872

申请日：1989-05-30

Applicant: BASF AG

Inventor： BUNG RICHARD ,  LAUN MARTIN ,  LOUIS GERD ,  SCHMIDT FRANZ

IPC: B60K17/34 ,  B60K17/346 ,  B60K17/35 ,  C10M145/04 ,  C10M145/14 ,  C10N20/00 ,  C10N40/08 ,  F16D35/00

Abstract: Fluid friction coupling for automatic engagement and disengagement of torque transmission, when the input or output side of the clutch exceeds or falls below a difference in speed, in particular for automatic engagement and disengagement of multiple-wheel drives of motor vehicles, with a working fluid consisting of a dilatant fluid, characterized in that the working fluid is an extremely dilatant copolymer dispersion whose characteristic dilation values, namely critical shear rate gamma k and maximum transmissible shearing strain tau max, are stabilized to permanent loading by emulsion polymerization with an additional 5 to 30 wt. %, preferably 8 to 18 wt. %, referred to the finished polymerizate, of (meth)alkyl compounds with at least 2 polymerizable double bonds in the molecule, e.g. dialkylephthalate and/or (meth)alkyl(meth)acrylates as comonomers.

公开(公告)号：AT72888T

公开(公告)日：1992-03-15

申请号：AT89906095

申请日：1989-05-30

Applicant: BASF AG

Inventor： BUNG RICHARD ,  LAUN MARTIN ,  LOUIS GERD ,  SCHMIDT FRANZ

IPC: B60K17/346 ,  F16D35/00

公开(公告)号：CA1267485A

公开(公告)日：1990-04-03

申请号：CA490250

申请日：1985-09-09

Applicant: BASF AG

Inventor： BUNG RICHARD ,  HAAS KLAUS ,  LAUN MARTIN ,  SCHMIDT FRANZ ,  WELZEL GERHARD

IPC: C08K3/20 ,  C08J3/02 ,  C08J3/03 ,  C08K3/00 ,  C08K3/105 ,  C08K3/16 ,  C08K3/22 ,  C08K3/24 ,  C08K3/26 ,  C08L101/08

Abstract: A dispersion, having highly dilatant flow, of a carboxyl-containing copolymer of monoolefinically unsaturated monomers, wherein the temperature dependence of the critical shearing rate is greatly reduced by incorporation of from 0.1 to 30% by weight of oxides, hydroxides, carbonates and/or water soluble salts of monovalent or divalent metals.