Polyvinyl alcohol-polyurethane elastic polishing grinding wheel and preparation method thereof

Abstract

The invention discloses a polyvinyl alcohol-polyurethane elastic buffing wheel and a preparation method of the polyvinyl alcohol-polyurethane elastic buffing wheel. The preparation method comprises the steps that firstly, polyvinyl alcohol is mixed with distilled water, and the mixture is dissolved for 20-30 minutes under the condition of 50-95 DEG C water bath and at the rotation speed of 400-600r / min to obtain a polyvinyl alcohol aqueous solution; then, the polyvinyl alcohol aqueous solution is heated up to 30-100 DEG C, grinding materials are firstly added into the polyvinyl alcohol aqueous solution, after the mixture of the grinding materials and the polyvinyl alcohol aqueous solution is stirred and mixed evenly at the rotation speed of 400-600r / min, polyurethane pre-polymers, catalysts and air hole generating agents are added, and all the components are stirred and mixed evenly at the rotation speed of 400-600r / min and react for 5-10min; solidification is conducted for 2-4h under the condition of 30-100 DEG C, and then the buffing wheel which is good in elasticity, good in water resistance, good in heat-dissipating performance and high in mechanical strength is obtained. The elastic buffing wheel is even in foam hole, good in abrasion resistance and grinding force, not prone to deforming or curling in humid environment and applicable to long-time grinding work.

Description

technical field [0001] The invention relates to a polishing grinding wheel, in particular to a polyvinyl alcohol-polyurethane elastic polishing grinding wheel and a preparation method thereof; the elastic polishing grinding wheel has high cross-linking density, good elasticity, good water resistance, excellent heat dissipation performance, and mechanical strength high feature. technical background [0002] Polishing technology is an emerging technology and a complex frontier subject, belonging to the field of grinding and polishing technology. Polishing grinding wheel integrates grinding and polishing, has excellent grinding and polishing performance, and is widely used in various fields such as aviation, machinery, automobile, shipbuilding, metallurgy, chemical industry, construction, furniture, decoration and daily necessities. [0003] The preparation method of the traditional polishing wheel is usually a dry preparation process, that is, mixing abrasives, binders, wetti...

AI Technical Summary

Problems solved by technology

[0008] However, although polyvinyl acetal elastic polishing wheels are widely used, their performance is not ideal, and their applications are limited. They also have the following disadvantages: 1) aldehydes are toxic and highly volatile, and the production and production It is unsafe to use, endangers health and seriously pollutes the environment; 2) The ratio of abrasive to binder is difficult to control, if the ratio is too large, the bond is not strong, and it is easy to fall off; if the ratio is too small, the slurry is difficult to mix, and even coagulation and precipitation may occur; 3) The density and cell structure of the finished product are quite different; 4) The degree of acetalization is difficult to control, and the acetalization time is long; 5) The brittleness is relatively large; 6) It is difficult to modify and apply to other fields

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