THERMOPLASTIC ELASTOMERIC MATERIAL Russian patent published in 2012 - IPC C08L23/00 C08L27/06 C08K13/02 B82B1/00 

FIELD: chemistry.

SUBSTANCE: material is made from a composition which contains rubber, thermoplastic, a sulphur vulcanising system or a resin vulcanising system based on alkyl phenol-formaldehyde resin, stearic acid and powdered filler. The filler is selected from a group comprising natural mineral schungite which contains technical carbon in amount of 0.4-5.2 wt %, kaolin or chalk. The vulcanising systems contain zinc oxide as a vulcanisation activator. The rubber used is butadiene-nitrile rubber containing 18-50 wt % acrylonitrile. The thermoplastic used is polyvinyl chloride containing, per 100 pts.wt polyvinyl chloride, 20-100 pts.wt mixture of dioctyl adipate with 2.7-3.2 pts.wt epoxidated soya oil (ESO), or 20-100 pts.wt mixture of dibutyl sebacate with 2.7-3.2 pts.wt ESO or 20-100 pts.wt mixture of dioctyl phthalate with 2.7-3.2 pts.wt ESO. The filler has particle size ranging from 10 nm to 200 nm and outer specific surface area ranging from 20 to 40 m²/g. Components of the composition are in the following ratio, pts.wt: rubber -100, thermoplastic - 90-260, vulcanising system - 0.55-6, zinc oxide - 2-7, stearic acid - 0.7-2, filler - 1-100.

EFFECT: material has high resistance in stress-free state to liquid aggressive media, narrow range of nominal tensile strength of the material and limited relative elongation thereof, improved set of process and elastic properties, processability into an article from melt without vulcanisation by pressure casting or extrusion, and narrow range of hardness of articles.

5 cl, 2 tbl, 540 ex