Soft acting phenol-formaldehyde resin bonded grinding wheel

Details Soft acting phenol-formaldehyde resin bonded grinding wheel Soft acting phenol-formaldehyde resin bonded grinding wheel

1976-05-21

1980-12-16

Arnold, Donald J.

Abrasive tool making process, material, or composition

With synthetic resin

51295, 260 38, 260 39SB, C08J 514

Patent

active

042395038

ABSTRACT:
The invention is a phenol-formaldehyde resin bonded grinding wheel which has grinding characteristics like that of shellac bonded grinding wheels. This soft, mild grinding action results from the basic phenol-formaldehyde resin initially containing from 0.5 to 2.5% by weight of hexamethylenetetramine, when used in conjunction with a material such as liquid one-stage phenol-formaldehyde resin, or furfural as the bond pick-up agent.

REFERENCES:
patent: 2769700 (1956-11-01), Goepfert
patent: 2897074 (1959-07-01), Redfarn
patent: 3020254 (1962-02-01), Less et al.
patent: 3208836 (1965-09-01), Biglin et al.
patent: 3406020 (1968-10-01), D'Alessandro
patent: 3820290 (1974-06-01), Erikson

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