Binding agent

The bonding agents used to manufacture resin-bonded diamond grinding tools mainly include phenolic resin, epoxy resin, neophenol resin, polyimide resin, 11-10 bakelite powder, urotropine (hexamethylenetetramine) and Other newly developed varieties, etc.

Female phenolic resin

Phenolic resin is a polymer compound formed by heating and condensation polymerization of phenols (phenol, cresol, xylenol, resorcinol) and aldehydes (formaldehyde, aldehyde, aldehyde) under the action of acidic or alkaline catalysts. . Due to different processes, liquid phenolic resin and solid phenolic resin can be made. Solid phenolic resin is also called powdered phenolic resin.

(1) Raw materials for manufacturing phenolic resin

D Phenol Phenol, also known as carbolic acid, is a pure white colorless needle-shaped crystal that can be oxidized to light pink in the air. Phenol can be dissolved in hot water, alcohol, alkali, etc. It is weakly acidic and can easily penetrate into human skin and cause allergies.

2. Formaldehyde Formaldehyde is a colorless gas. The aqueous solution of formaldehyde used to make phenolic resin is used. Formaldehyde is soluble in water and alcohol. Formaldehyde stored for a long time is easy to polymerize and precipitate into white lumps. Adding 8% to 12% methanol (CH, OH) can prevent polymerization. Formaldehyde has a strong irritating odor.