COMPOSITION MATERIAL HAVING SURFACE ENRICHED BY POLYDIMETHYLSILOXANE Russian patent published in 1997 - IPC

FIELD: production of composite material. SUBSTANCE: composition material comprises polymer base having surface being enriched by polydimethylsiloxane e. g. , polyvinyl chloride or polycarbonate and polymer modifying agent, its quantity being 0.03-2 wt.%. Grafted copolymer of polymethylmethacrylate with polydimethylsiloxane wherein polydimethylsiloxane produces side chains having ratio of monomer units of polymethylmetahcryalte and polydimethylsiloxane from 1:0.125 to 1:1.6 and number of units in siloxane chain is from 50 to 250 being used as mentioned above polymer modifying agent. Thus siloxane content in surface layer of modified polymer is increased up to 60-100 %. Surface characteristics of modified polymer are as follows: hydrophobia, biocompatibility, refractoriness, resistance against abrasion, resistance against steam of atomic oxygen and oxygen plasma. EFFECT: improved quality of desired product. 2 cl, 2 tbl, 1 dwg