Phenolic resin for coating abrasive tools and preparation method thereof

Abstract

The invention relates to a phenolic resin for coating abrasive tools and a preparation method thereof. The preparation method comprises the following steps: firstly preparing a water soluble phenolic resin through the addition polycondensation reaction of a compound of phenol, aldehyde and the like in the presence of an alkali catalys, then mixing the prepared phenolic resin with a high-strength active phenolic resin at 45-60 DEG C to constitute a major ingredient, stirring for about 10-35 minutes; cooling to 30-40 DEG C, adding at least one inorganic active additive in the major ingredient and stirring for 5-30 minutes; slowly adding at least one inorganic filler and rapidly stirring for 10-40 minutes; reducing the temperature below 30 DEG C, finally adding at least one thermal-plasticity resin to mix with a mixed solvent, mixing at high speed to carry out physical-chemical reaction, controlling the viscosity at 2000-2500 cps / 25 DEG C, and filtrating and discharging. The modified phenolic resin reduces the production cost and improves the adhesive bonding performance of products as well as the heat resistance performance, the wear resistance performance and the impact resistance performance of the products.

Description

Technical field [0001] The invention relates to a phenolic resin and a preparation method thereof, in particular to a phenolic resin for coated abrasive tools and a preparation method thereof. Background technique [0002] With the rapid development of the coated abrasives industry, the market has gradually increased the performance requirements of products. As one of the three major components of coated abrasives, the adhesive has played an important role, and its research and development have been continuous. [0003] The patent with publication number CN1377916A proposes a water-soluble phenolic resin / nano-clay composite and its preparation method. The layered nano-silicate clay is mainly used in the preparation of phenolic resin. The product has excellent bonding strength. , It is the raw material for manufacturing reinforced abrasive sheet, emery cloth, abrasive belt, sandpaper and coated abrasive tools. [0004] The patent with publication number CN1799771A proposes a manufac...

AI Technical Summary

Problems solved by technology

[0012] Although the above known phenolic resins have their own advantages, they also have shortcomings in the application of coated abrasives. The bonding performance is not very good, and the heat resistance, wear resistance and impact resistance still need to be improved.