ORGANOSILOXANES, METHOD OF THEIR SYNTHESIS AND POLYMERIC COMPOSITION ON THEIR BASIS Russian patent published in 1995 - IPC

FIELD: polymeric compositions. SUBSTANCE: organosiloxanes of the general formula where m whole number from 3 to 10; n 1; A and B are similar or different radicals: H, Si(CH₃)₃; p 0 or 1; if p 0 then A and B direct bond forming cyclic structure; R₁=CH₃, R₂=CH=CH-, CH₂=C-CH₃COO(CH₂)₃, , H₂N-(CH₂)₃, , R₅=H,CH₃. Organosiloxanes were synthesized by interaction of dialkoxysiloxane of the general formula (OR₆)₂SiR₂ and dialkoxysilane of the general formula (OR₆)₂SiR₁R₃ where R₁, R₂, R₃ as indicated above, R₆-CH₃, C₂H₅ with water at boiling point of reaction mixture for 2-10 hr in the presence of tin butyldilaurate, or by interaction of organosiloxane of the general formula H(OSiR₁ R₂)_n-(OSiR₁ R₃)_mOH where R₁, R₂, R₃, n, m, have indicated above meaning with hexamethyldisiloxane at 20-120 C for 1-5 hr. Synthesized organosiloxanes at concentration 0.1-0.5 wt.-% were used for stabilization of polyolefins, copolymers of acrylic acid and maleic anhydride, polyamides. EFFECT: improved method of synthesis. 6 cl, 5 tbl