Patent ID: 6918937
Filing Date: 2005-07-19
Classification: B24B,C09G,C09K

Abstract:
1. A rheopectic abrasive visco-elastic medium composition for abrasive working of a work piece comprising: A. a visco-elastic poly(boro-siloxane) polymer carrier having a static viscosity of from about η=5×10 3 Centipoise to about η=5×10 5 Centipoise; B. a particulate abrasive; C. an optional inert filler in an amount of up to about 25% by weight of said medium; an optional plasticizing lubricant for said visco-elastic polymer in an amount of up to about 25% by weight of said medium; E. said medium having a static viscosity of from about η=2×10 4 Centipoise to about η=8×10 6 Centipoise, said medium containing a total volume of said particulate abrasive and of said inert filler less than a critical particulate solids volume concentration of said medium; and F. the resulting visco-elastic abrasive medium having from 50% to about 99% of the deflection by elastic deformation, and 1 to 50% of the deflection of the medium by fluid or plastic flow, when subjected to applied strain rates greater than about 2.5 sec −1 .