Abrasive tool making process – material – or composition – With synthetic resin
Patent
1992-12-17
1993-12-28
Bell, Mark L.
Abrasive tool making process, material, or composition
With synthetic resin
51293, 51307, 51309, 433166, C09K 314
Patent
active
052735591
ABSTRACT:
An abrasive composition and dental articles made from same, the composition including abrasive particles dispersed throughout and entrapped within a polyurea or polyurethane urea matrix which contains soft and hard segments wherein the matrix is made from the polymerization reaction of a polyfunctional amine and a polyfunctional isocyanate. The abrasive dental articles include prophylactic cups and polishing wheels, points and discs.
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Hammar W. James
Joos Richard W.
Bell Mark L.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Thompson Willie J.
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