METHOD FOR OBTAINING POLYMER POLYOLS Russian patent published in 2016 - IPC C08F283/06 C08F4/34 C08G18/63 

FIELD: chemistry.

SUBSTANCE: described is method for obtaining polymer polyol with content of solid polymer, which constitutes not more than 60 wt %, including mixing main polyol, one or several monomers, containing ethylene unsaturation of monomers, polymerisation initiator, possibly, macromer, as well as, possibly, chain transfer agent and carrying out polymerisation at temperature below 120°C in thus obtained mixture, wherein initiator has formula R₁-C(=O)-O-O-R₂ (I), wherein R₁ represents 1-ethylpentyl, and R₂ is alkyl group with formula -C(R₃)(R₄)-C(R₅)(R₆)(R₇) (II), where R₃ and R₄ are similar or different and represent alkyl group, including to 10 carbon atoms, R₅, R₆ and R₇ are similar or different and represent hydrogen atom or alkyl group, where polymerisation reaction takes place, in fact, in absence of preliminarily obtained stabiliser, and where main polyol represents polyetherpolyol with nominal functionality more than 2.5 and molecular weight in the range from 2000 to 14000, and where at least one of R₅, R₆ and R₇ represents alkyl group and is selected from methyl group, ethyl group or tertiary butyl group. Described is method for obtaining polymer polyol with content of solid polymer, which constitutes not more than 60 wt %, including mixing main polyol, one or several monomers, containing ethylene unsaturation, polymerisation initiator, possibly, mactomer, as well as, possibly, chain transfer agent and carrying out polymerisation at temperature from 50 to 200°C in thus obtained mixture, wherein initiator possesses formula R₁-C(=O)-O-O-R₂ (I), wherein R₁ is alkyl group, including to 10 carbon atoms, and R₂ is alkyl group with formula -C(R₃)(R₄)-C(R₅)(R₆)-C(R₇)(R₈)(R₉) (III), wherein R₃ and R₄ are similar or different and represent alkyl group, including to 10 carbon atoms, R_5' and R_6' are similar or different and represent hydrogen atom or alkyl group, including to 10 carbon atoms, R_7', R_8' and R_9' are similar or different and represent hydrogen atom or alkyl group, including to 10 carbon atoms, on condition that not all of R₇', R₈' and R₉' are hydrogen atoms in case when both R₅' and R₆' represent hydrogen atoms.

EFFECT: reduction of duration of portion obtaining, increase of process productivity.

10 cl, 1 ex