Wet hard fine polishing wheel polishing material and preparation method thereof

Abstract

The invention relates to a wet hard fine polishing wheel polishing material, which is prepared from the following ingredients in parts by weight: 90 to 100 parts of polyether polyol, 40 to 60 parts of polyisocyanates, 30 to 40 parts of abrasive materials, 6 to 10 parts of coupling agents, 8 to 10 parts of chain expanding agents, 3 to 6 parts of foaming agents, 0.1 to 0.5 part of catalysts and 1 to 2 part of water. Through a two-step method, polyurethane prepolymers and modified grinding materials are firstly prepared respectively and are then mixed to perform a foaming reaction; the problems of great foam hole distribution differences and polishing material property brittlement due to serious heat release of the one-step integrated reaction are solved. The prepared wet hard fine polishing wheel polishing material has the advantages that the foam hole distribution is uniform; the texture is soft and elastic; the fine gap grinding of objects can be realized; the contact area between the grinding materials and a workpiece can be increased; the grinding efficiency is improved; meanwhile, good heat radiation performance is realized.

Description

technical field

[0001] The invention relates to the technical field of grinding and polishing, in particular to a wet hard fine polishing wheel polishing material and a preparation method thereof. Background technique

[0002] Polishing materials with sheet-like flexible substrates such as sandpaper are not fixed in shape, so usually they can only be polished by hand or with hand tools, and the sheet-like polishing materials have poor heat dissipation, and the heat generated by friction may cause burns and discoloration of polished products and affect the overall Polished effect. Existing polishing materials can reduce the heat of friction to a certain extent, but their general volume is relatively large, and it is inconvenient to use when holding it by hand, and it is necessary to squeeze the shape of the polishing material when holding it to make the distance between the polishing surface and the workpiece The contact area between them becomes smaller, and the polishing m...