公开(公告)号：EP0938366A1

公开(公告)日：1999-09-01

申请号：EP97943941.0

申请日：1997-10-03

申请人： RHONE-POULENC FIBRES & POLYMERES SA

发明人： CANIVENC, Edith ,  HORBEZ, Dominique

IPC分类号： B01D61 ,  C07C209 ,  C07C227 ,  C08G69 ,  C07C211 ,  C07C229

CPC分类号： C08G69/28 ,  B01D61/44 ,  C07C209/84 ,  C07C227/40 ,  C07C211/12 ,  C07C229/08

摘要： The invention concerns a method for extracting by electrodialysis a compound comprising at least amine functions capable of protonation from a liquid medium. More particularly it concerns a method for extracting, and separating at least the monomers comprising amine functions capable of protonation from a liquid medium derived from the hydrolysis of polyamides. The method of extraction from a liquid medium consists in subjecting to protonation the amine function(s) of the compounds to be extracted by adjusting the pH of the medium and in separating the compounds by passing them through a cationic membrane under the effect of an electric current. The invention is particularly applicable in processes for the chemical stabilisation of polyamides such as the PA 66, PA 6.

公开(公告)号：EP0854888A1

公开(公告)日：1998-07-29

申请号：EP96934597.0

申请日：1996-10-09

申请人： RHONE-POULENC FIBRES & POLYMERES SA

发明人： OPPERMANN, Wilhelm ,  HERMANUTZ, Frank ,  HIRT, Peter ,  SCHWEIZER, Michael ,  OESS, Oliver

IPC分类号： C08F2 ,  C08F299 ,  C08G18 ,  D01F6 ,  D06M10 ,  D06M101

CPC分类号： D01F6/70 ,  C08G18/675 ,  C08G18/676 ,  C08G18/678 ,  C08G18/679 ,  Y10S528/906

摘要： The invention concerns a polyurethane elastomer containing structural units of type (a), in which: the group -O-R1-O- is a macrodiol group with a molecular weight of approximately 500 to 10000, R2 is a bivalent aliphatic, cycloaliphatic and/or aliphatic-cycloaliphatic group; and X is a short-chain olefinically unsaturated group, Y is NH or O, n is an integer from 1 to 10 and m is an integer of at least 4. The invention also concerns a method of preparing this polyurethane elastomer which can be melt-spun to form fibres or melt-extruded to form foils. The fibres or foils can be exposed to energy-rich radiation such that crosslinking of the polyurethane occurs. Fibres according to the invention display superior properties in terms of textile-mechanical properties, in particular good tensile strength, elongation at tear, residual elongation and heat distortion temperature.