PRELIMINARILY CROSS-LINKED PARTICLES OF ORGANOSILICON ELASTOMER WITH ORGANOPOLYMER SHELL AS POWDERED VARNISH CONSTITUENT Russian patent published in 2000 - IPC

FIELD: polymer materials. SUBSTANCE: powdered varnish composition based on thermoplastic or thermoreactive binders containing preliminarily cross-linked particles of organosilicon elastomer with organic polymer shell is distinguished by that mentioned particles contain (i) 5 to 95 wt.% of core polymer having general formula (R₂SiO_2/2)_x•(RSiO_3/2)_y•(SiO_4/2)_z, wherein x= 5-99.5 mol %, y=0.5-95 mol %, and z=0-20 mol %, and R, identical or different, are alkyls or alkenyls with 1-6 carbon atoms, aryls, or substituted hydrocarbon residues; and (ii) 5-95 wt.% of shell made from organic polymer prepared from ethylenically mono- or polyunsaturated monomers. EFFECT: improved impact and atmosphere resistance values. 6 cl, 1 tbl, 4 ex