Fixed abrasive grinding media

Details Fixed abrasive grinding media Fixed abrasive grinding media

1982-09-16

1984-07-17

Derrington, James H.

Abrasive tool making process, material, or composition

Pore forming

51298, B24D 332

Patent

active

044597797

ABSTRACT:
The grinding media is formed of a concentration of agglomerate free hard particles exceeding 50 percent by weight of the media, wherein the particles are chelated by a dispersing agent, surface treated with a surfactant, mixed with polyether polyol and polyisocyanate plus a catalyst and water and thereafter rapidly cured in a closed mold which has been preheated to a temperature exceeding 50.degree. C. and a pressure of 60 to 120 PSIG. The water reacts during curing to create a polyurea linkage and release CO.sub.2 as a blowing agent. The resulting media has a low elastic modulus with particles retained in a polyurethane-urea binder system. The media composition may also include an inorganic filler such as glass fibers not exceeding 30 percent by weight of the media.

REFERENCES:
patent: 3773480 (1973-11-01), Hall et al.
patent: 3850589 (1974-11-01), Charvat
patent: 4011063 (1977-03-01), Johnston
patent: 4138228 (1979-02-01), Hartfelt et al.
patent: 4221572 (1980-09-01), Torimae et al.
patent: 4264337 (1981-04-01), Fenster et al.
patent: 4331453 (1982-05-01), Dau et al.
patent: 4343910 (1982-08-01), Busch et al.

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