OLIGOALKYLHYDRIDESILOXANES AND SYNTHESIS METHOD THEREOF Russian patent published in 2010 - IPC C08G77/08 C08G77/12 C08G77/18 

FIELD: chemistry.

SUBSTANCE: invention relates to chemistry and technology of obtaining siloxane oligomers. Proposed are new (organoalkoxysilyl)oligoalkylhydridesiloxanes of general formula R_a(R¹O)_3-aSiO[R²HSiO]_nR¹ (R - alkyl C₁-C₁₂, phenyl, vinyl, methyltrifluoropropyl and 3-(fluoroalkoxy)propyl of general formula H(CF₂)_pCH₂O(CH₂)₃ where p=4, 6, 8; R¹ - alkyl C₁-C₈; R² - methyl, ethyl; n=3-30; a=1-3) and a method of obtaining the said compounds via catalytic rearrangement between organoalkoxysilane of general formula R_aSi(OR¹)_4-a, (R, R¹, a assume values given above) and linear or cyclic oligoalkylhydridesiloxane of general formula [R²HSiO]_m (R² assumes values give above, m=4-60). Molar ratio of R_aSi(OR¹)_4-a to R²HSiO equals 1:(3-30). The process is carried out while heating at temperature 60-95°C in the presence of an acid catalyst. At the end of the rearrangement reaction, the product is neutralised with alkali-earth metal carbonates with subsequent removal of the solid phase. Product output is equal to 94-97%. The obtained products may be components of mixtures for hydrophobisation of construction materials, lacquer coatings, paper, textile products, etc.

EFFECT: design of a method for obtaining new organosilicon oligomers containing functional alkoxy-, SiH-groups in a linear chain.

4 cl, 10 ex