C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 171/00 (2006.01)
Patent
CA 2093101
NOVEL ELECTRORHEOLOGICAL (ER) FLUID BASED ON AMINO ACID CONTAINING METAL POLYOXO-SALTS ABSTRACT The present invention relates to an electrorheological fluid composition comprising a dispersion of a plurality of solid particles in an electrically non-conducting liquid, the improvement comprising using as said solid particles a composition having the general formula: [(M)P(H2O)x(OH)y]qc[A]rd ? Bz ? nH2O wherein M is a metal cation or a mixture of metal cations at various ratios; p is the total valence of M and has a value of greater than zero; x is zero or has a value greater than zero, y is zero or has a value greater than zero, with the proviso that only one of x or y can be zero at any given time; q has a value of p minus y with the proviso that q has a value of at least one; c has a value of greater than zero; A is an anion or a mixture of anions at various ratios; r is the total valence of A with the proviso that r has a value of at least one; d has a value of greater than zero with the proviso that (q x c) is always equal to (r x d); B is an amino acid or a mixture of amino acids; z has a value of from 0.01 to 100; and n is a number from 0 to 15. The ER fluids of the present invention have greatly improved yield stress increasing potential stress transfer characteristics and good dispersion stability.
Conway Lori J.
Kadlec Donald A.
Sudbury-Holtschlag Joan
Dow Corning Corporation
Gowling Lafleur Henderson Llp
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