JSC «Volzhsky Abrasive Works»

CUMI-Murugappa Group

Documentation

Bakelite bond

Bakelite bond or tar bond is produced on the basis of phenol-formaldehyde tar.

Bakelite is produced by combination of carbolic acid (phenol) and formaldehyde in different proportion. By variation of these components they produce tar with high content of phenol or varnish with high content of formaldehyde.

Apart from tars in producing of bonds are used different filling agents if inorganic origin such as cryolite, pyrite, alabaster, etc. High strength of bakelite bond allows abrasive instrument work at high stresses and high cutting speed.

Bakelite bond disadvantage - not high thermal resistance - bond destruction happens at 400º-700ºC, not sufficient resistance to alkaline solution, which limits application of cooling liquids (undesirable to apply solutions with alkali content more than 1,5%).