FUNCTIONAL POLYMETALLOSILOXANES Russian patent published in 2007 - IPC C08G79/00 

FIELD: organosilicon polymers.

SUBSTANCE: invention provides novel functional polymetallosiloxanes that could find use in modifying polymers and imparting new properties to materials. Novel functional polymetallosiloxanes are characterized by having statistic cyclolinear structure depicted by general formula I: (I), where M represents bi- or trivalent metal selected from series: Zr, Zn, Fe(II), Fe(III), Ce, Cu, Cr, Sm, Eu and t corresponds to valence of metal; Alk is substituent CH₃, C₆H₅, or NH₂ (CH₃)₃-; R' is substituent CH₂=CH-; n=0 or 1; R" represents at least one unit from following series of units: -OSiR'n(OAlk)_2-n, -OSiR'R"(OAlk)_1-nO_1/2, and -OSiR'R"_n(O_1/2-)_2-n; k ranges from 2 to 500; and A represents at least one ordinary bond and/or Alk. Functional polymetallosiloxanes are prepared via hydrolytic polycondensation of functional metallosiloxane selected from those having general formula II: (II), where M, m, R', R", A;k, and n are as defined above, whereas metallosiloxane-to-water molar ratio ranges from 1:0.05 to 1:1.

EFFECT: expanded synthetic possibilities in organosilicon polymer area.

24 cl, 3 dwg, 1 tbl, 9 ex