Preparation method for green shallow-cured phenolic resin coated grinding tool

Abstract

The invention relates to a preparation method for a coated grinding tool, and discloses a preparation method for green shallow-cured phenolic resin coated grinding tool. The preparation method includes steps of treating a base fabric; preparing impregnation liquid; adding from 30 to 50 grams of water-soluble thermosetting phenolic resin and from 70 to 170 grams of water into every 100 grams of PVAC (polymer vinyl acetate) emulsion; realizing once or twice impregnation for the base fabric by the aid of the impregnation liquid, drying and ironing the base fabric after impregnation, realizing press polish, and scratching paste according to conventional process; applying primer; planting sand for a substrate according to conventional process after the primer is applied, drying the substrate planted with the sand at the temperature ranging from 50 DEG C to 60 DEG C for 20 to 25 minutes, then drying the substrate at the temperature ranging from 80 DEG C to 90 DEG C for 15 to 20 minutes and then drying the substrate at the temperature ranging from 100 DEG C to 108 DEG C for 30 to 60 minutes; and gluing again. The primer applied at first consists of components including, by weight percentage, from 20 to 25% of packing, from 45 to 50% of water-soluble thermosetting phenolic resin and from 30 to 35% of water, and primer for the step of gluing comprises components including, by weight percentage, from 50 to 60% of water-soluble thermosetting phenolic resin, from 20 to 30% of calcium carbonate, from 0 to 5% of iron oxide and from 15 to 20% of water. The preparation method has the advantages that cost can be lowered, curing temperature is reduced, curing period is shortened, an adhesion performance is improved, and color is light.

Description

Technical field [0001] The invention relates to a method for preparing coated abrasive tools, in particular to a method for preparing green light curing phenolic resin coated abrasive tools. Background technique [0002] Phenolic resin is the earliest industrialized synthetic resin. Since the German chemist Bayer discovered the condensation reaction of phenol and aldehyde in 1872, after more than 100 years of research and development, it has become one of the three most important synthetic resins today. Because of its easy-to-obtain raw materials and convenient synthesis, coupled with the high activity of phenol and formaldehyde, many chemical reactions can occur to produce many phenolic resins with different structures and properties, so as to meet different requirements for use. It is not only widely used in plastics, Film press products, adhesives, coatings, insulating materials and other traditional industries, and as instantaneous high temperature and ablation resistant comp...

AI Technical Summary

Problems solved by technology

[0003] Synthetic resin occupies a dominant position in the binder for removing abrasive tools; while water-soluble heat-curable phenolic resin occupies an absolute position in various resins, especially in the manufacture of high-grade coated abrasive tools, accounting for more than 80%. Dosage, of course, phenolic resin also has defects: 1. The curing cycle is long and the curing temperature is high; 2. The resin is brittle after curing and the peeling strength is low; Abrasives; 4. When drying and assimilating, free and harmful gases volatilize, which is harmful to the human body and the environment; 5. The storage period is limited, especially affected by the storage temperature.

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