HIGH-POROSITY POLYMER ABRASIVE COMPOSITION Russian patent published in 2013 - IPC B24D3/32 C08L63/04 

FIELD: chemistry.

SUBSTANCE: invention relates to polymer compositions intended for making porous high-elasticity abrasive and diamond tools for machining articles from steel and nonferrous metals. Proposed composition comprises epoxy-novolac block copolymer resin, butadiene-nitrile resin, gas forming agent, hardener, stearin, cryolite, silicon carbide or electrocorundum. Said epoxy-novolac block copolymer resin includes the product of copolymerisation of epoxy diane resin and phenol-formaldehyde resin with the products of alcoholysis of secondary PETF while gas-forming agent represents izoisobutyronitrile while tri-ethanolamine makes the hardener, at the following ratio of components in wt %: product of copolymerisation of epoxy diane resin and phenol-formaldehyde resin with the products of alcoholysis of secondary PETF - 100, butadiene-nitrile resin - 30-100, izoisobutyronitrile - 3-10, tri-ethanolamine - 0.3-0.7, stearin - 1-3, cryolite - 25-65, silicon carbide or electrocorundum - 300-700.

EFFECT: homogeneous structure, density and elasticity of abrasive tool, better working qualities.

2 tbl, 1 ex