METHOD OF PREPARING BETULIN-BASED POLYETHERS Russian patent published in 2001 - IPC

Abstract RU 2167892 C1

FIELD: manufacture of polymeric binders for thermoplastic composite materials. SUBSTANCE: polyether is prepared by polycondensation of betulin with dicarboxylic acid such as pimelinic or azelainic or sebacinic acids at betulin to acid molar ratio of 1:(1.01-1.04). Process is carried out in inert medium under constant stirring at 256-260 C. EFFECT: increased degree of conversion of monomers in the process of preparing polyether and lower melting temperature thereof. 2 cl, 1 tbl

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RU 2 167 892 C1

Authors

Orlova T.V.

Nemilov V.E.

Tsarev G.I.

Vojtova N.V.

Dates

2001-05-27—Published

1999-10-06—Filed