Molded abrasive article comprising non-foamed, friable polyurethane and process
AssigneeNational Research Development Corporation
InventorMaurice Arthur Frederick Hiles
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Abstract
A friction or abrasive composition comprises a dispersion of friction or abrasive particles in a polymeric substrate which becomes friable at a temperature below its softening point.
Claims29
A molded abrasive-containing article comprising a dispersion of abrasive particles in an unfoamed polyurethane substrate containing a multivalent metal borate, said substrate becoming friable at a temperature below its softening point.
A process for the production of a molded abrasive-containing article which comprises placing in a mold a composition comprising (i) a polymerisable mixture of a polyol and a diisocyanate, (ii) a multivalent metal borate, and (iii) abrasive particles, vibrating the composition so as to disperse the abrasive particles in the mixture while the polymerization proceeds, and continuing the polymerization until there is formed an unfoamed polyurethane substrate containing the multivalent metal borate and a dispersion of the abrasive particles, said substrate becoming friable at a temperature below its softening point.
Dependencies are inferred from the claim text.