COMPOSITION FOR PRODUCTION OF SEMI-FINISHED PRODUCT OF PRESS MATERIAL AND METHOD OF MAKING SEMI-FINISHED PRODUCT Russian patent published in 2016 - IPC C08L61/10 C08K7/02 C08K13/02 

FIELD: chemistry.

SUBSTANCE: invention relates to polymer compositions based on phenol-formaldehyde resin, butadiene-nitrile rubber in butyl acetate, powdered and fibrous fillers for production of semi-finished product of press material for general industrial purposes. Composition contains following components, pts.wt: resol type phenol-formaldehyde resin (Resol 300) in form of a solution with concentration (65±5)% per dry residue in alcohol - 35.0÷65.0; butadiene-nitrile rubber in form of a solution with concentration of 11 %÷16 % per dry residue in butyl acetate or acetone - 5.0÷10.5; magnesium oxide - 2.0÷3.0; zinc oxide - 1.0÷2.0; boric acid - 0.3÷0.4; sulphur - 1.0÷2.0; captax in form of a suspension in butyl acetate in ratio of 1 pts.wt of captax to 5 pts.wt butyl acetate - 1.0÷2.0; calcium stearate or zinc stearate in form of a slurry (suspension) in ratio 1 part stearate to 5 parts alcohol in an amount of 1 % of weight of dry residue of impregnating compound - 0.4÷0.5; fibrous filler - 50.0÷70.0. Method of making semi-finished product based thereon includes making an impregnating compound, preparation of fillers, their impregnation, drying semi-finished product and moulding samples therefrom.

EFFECT: technical result is stabilisation of physical and processing properties of moulding material, higher quality of impregnation, uniform distribution of all ingredients in volume of press material, improved fluidity of material during pressing of complex shape articles.

11 cl, 2 tbl, 6 ex