POLYVINYL CHLORIDE-FREE DECORATIVE SURFACE COVERINGS Russian patent published in 2019 - IPC C08J5/18 C08J5/04 B44C5/04 C08L23/08 B32B27/02 B32B27/04 B32B27/12 B32B27/30 B32B27/32 B32B17/02 

FIELD: chemistry.

SUBSTANCE: invention relates to a polyvinyl chloride (PVC) free decorative surface covering. Decorative surface covering includes a reinforced layer comprising a carrier impregnated with PVC-free paste. PVC-free paste is characterised by a dynamic viscosity value at 200 °C and at a shear rate of 100/s from 500 to 10,000 Pa⋅s. PVC-free paste contains the following, wt. %: from 5 to 50, preferably from 10 to 40 polyolefin mixture, which is characterised by melt flow rate equal to or less than 15 g/10 minutes at 190 °C and 2.16 kg in accordance with ASTM D1238 standard, from 45 to 90 of one or more than one filler, from 0.5 to 12 of one or more lubricants. Polyolefin mixture contains the following, wt. %: from 5 to 55, preferably from 10 to 50, more preferably from 15 to 45 and most preferably from 20 to 40 homo- or copolymer of ethylene (A) containing alpha-olefins, from 5 to about 55, preferably from 10 to 50, more preferably from 15 to 45 and most preferably from 20 to 40 copolymer of ethylene (B) containing vinyl carboxylate and / or alkyl(meth)acrylate, from 5 to 55, preferably from 10 to 50, more preferably from 15 to 45 and most preferably from 20 to 40 of polyolefin elastomer (C), from 1 to 25, preferably from 3 to 20 and most preferably from 5 to 15 polyolefin (D) containing a polar group. PVC-free decorative surface coverings are produced by a calendering process.

EFFECT: technical result is providing PVC-free decorative surface coverings with sufficient flexibility and sufficient resistance to indentation.

17 cl, 1 tbl, 1 ex