METHOD OF PRODUCING HIGH-STRENGTH FRICTIONAL MOULDING MATERIAL Russian patent published in 2013 - IPC C08J5/14 C08L61/10 C08L63/00 C08K13/02 

FIELD: chemistry.

SUBSTANCE: invention relates to production of frictional moulding materials which can be used in making brake pads, clutch plates and when producing high-strength structural materials for mechanical engineering, electrical engineering and other purposes. The method involves adding a solution of a modifier and a lubricant into a water-emulsion or water-alcohol phenol-formaldehyde resin by mixing to a homogeneous state. The obtained product is then mixed with an inorganic fibre filler and mineral powder, dried, pelleted and moulded. The modifier used is a water-soluble epoxy resin obtained by reacting epoxy diane resin with polyethylene glycol and a technical mixture of dioxane alcohols in the presence of a tertiary amine. Components are in the following ratio, pts.wt: phenol-formaldehyde resin in terms of dry mass - 100, modifier in terms of dry mass - 20-120, inorganic fibre filler - 40-300, mineral powder - 10-90, lubricant - 1-8.

EFFECT: invention improves strength properties of frictional moulding material based on phenol-formaldehyde resins and eliminates organic solvents from the production process.

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