公开(公告)号：DE102007046686A1

公开(公告)日：2008-04-30

申请号：DE102007046686

申请日：2007-09-28

Applicant: BASF AG

Inventor： BUERKLE JOCHEN ,  WISSEL KATHRIN ,  HERBEL JUERGEN ,  WETTLING THOMAS ,  BODE ANDREAS ,  BECHTLOFF BERND ,  HOFFNER BERNHARD

IPC: C08F6/00 ,  C08F6/12 ,  C08J3/14 ,  F17D1/17

Abstract: Precipitation method involves utilizing a non-polar solvent or solvent mixtures. The solution is removed with a polar solvent selectrd from hydroxyl group containing compound, has a general formula (I) and carbonyl group containing compound has general formula (II). The precipitated polymer is isolated. A replacement with the polar solvents and the separation of volatile solution components from the polymers are carried out by degassing in a stirred tank, kneading machine, thin film vaporizer, falling film evaporator or coil tube evaporator. The hydroxyl group containing compound having general formula (I), is R1>(O-A)n-OH. R1>H, 2-20C alkyl or alkenyl residue, 5-20C cycloalkyl residue or 6-20C aryl, alkyl aryl or aryl alkyl residue; A : 2-4C alkylene; and n : 0-10. The carbonyl group containing compound having general formula (II) is R2>-CO-X-R3>. R2>H, 2-20C alkyl or alkenyl residue, 5-20C cycloalkyl residue or 6-20C aryl, alkylaryl or arylalkyl residue; X : S or O and R3>2-20C alkyl or alkenyl residue, 5-20C cycloalkyl residue or 6-20C aryl, alkylaryl or arylalkyl residue.