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公开(公告)号：EP1753797B1
公开(公告)日：2007-11-07
申请号：EP05750544.8
申请日：2005-05-17
发明人： SCHWITTAY, Claudius , STÖCKELMANN, Elmar , HEINEMANN, Johannes , ZÖLLNER, Knut , STAMMER, Achim
摘要： The invention relates to a method for removing residual monomers from polyoxymethylene homo- or copolymers with the following method steps: a) in a degasifying device, the residual monomers are drawn out in the form of vapors from the polymers; b) the residual monomer vapors are led away via a vapor line; c) in a condensation device, the residual monomers are condensed out of the vapors at 1.09 to 102.4 bar and at 102 to 230 DEG C, during which a temperature of at least 102 DEG C must be maintained at every point on the condensation device, and the surfaces of the condensation device that come into contact with the vapors are covered with a liquid film comprised of condensed residual monomers.
摘要翻译： 本发明涉及一种通过以下方法步骤从聚甲醛均聚物或共聚物中除去残留单体的方法：a）在脱气装置中，将残余单体以来自聚合物的蒸汽的形式抽出; b）残余单体蒸气通过蒸汽管线排出; c）在冷凝装置中，残余单体在1.09-102.4巴和102-230℃下从蒸气中冷凝出来，在此期间必须在冷凝装置上的每个点保持至少102℃的温度， 并且与蒸气接触的冷凝装置的表面覆盖有由冷凝的残余单体构成的液体膜。
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公开(公告)号：EP1395620A2
公开(公告)日：2004-03-10
申请号：EP02747321.4
申请日：2002-05-24
CPC分类号： C08F110/10 , C08F10/00 , C08F110/06 , Y10S526/918 , C08F2/38 , C08F4/00 , C08F2/01 , C08F4/16 , C08F2500/02 , C08F2500/03
摘要： The invention relates to a method for producing homopolymers and copolymers of isobutene by the continuous cationic polymerization of isobutene or mixtures of isobutene with ethylenically unsaturated comonomers in the presence of an initiator system comprising: i) a Lewis acid selected among covalent metal-halogen compounds and covalent semimetal-halogen compounds; ii) at least one aprotic organic compound (I) having at least one functional group (FG) which, under polymerization conditions, forms a carbocation or a cationogenic complex with the Lewis acid, in an organic solvent that is inert to the Lewis acid. The inventive method is characterized in that the polymerization is carried out in a tubular continuous flow reactor that has a number of bends with an alternating bending direction.
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公开(公告)号：EP1819745A1
公开(公告)日：2007-08-22
申请号：EP05815897.3
申请日：2005-11-28
CPC分类号： B01J19/0053 , B01J19/2415 , C08G2/08 , C08G2/10 , C08G2/22 , C08G2/30
摘要： The invention relates to a method for producing polyoxymethylenes by the polymerisation of monomers in the presence of cationically active initiators and optionally in the presence of chain transfer agents and by the subsequent deactivation and isolation of the polymers. Said method is characterised in that the polymerisation takes place in a tubular reactor comprising static mixing elements, said reactor having a mixing zone, a polymerisation zone and a deactivation zone and that the diameter of the tubular reactor in the mixing zone is
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公开(公告)号：EP1753797A1
公开(公告)日：2007-02-21
申请号：EP05750544.8
申请日：2005-05-17
发明人： SCHWITTAY, Claudius , STÖCKELMANN, Elmar , HEINEMANN, Johannes , ZÖLLNER, Knut , STAMMER, Achim
摘要： The invention relates to a method for removing residual monomers from polyoxymethylene homo- or copolymers with the following method steps: a) in a degasifying device, the residual monomers are drawn out in the form of vapors from the polymers; b) the residual monomer vapors are led away via a vapor line; c) in a condensation device, the residual monomers are condensed out of the vapors at 1.09 to 102.4 bar and at 102 to 230 °C, during which a temperature of at least 102 °C must be maintained at every point on the condensation device, and the surfaces of the condensation device that come into contact with the vapors are covered with a liquid film comprised of condensed residual monomers.
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公开(公告)号：EP1395620B1
公开(公告)日：2007-08-15
申请号：EP02747321.4
申请日：2002-05-24
CPC分类号： C08F110/10 , C08F10/00 , C08F110/06 , Y10S526/918 , C08F2/38 , C08F4/00 , C08F2/01 , C08F4/16 , C08F2500/02 , C08F2500/03
摘要： The invention relates to a method for producing homopolymers and copolymers of isobutene by the continuous cationic polymerization of isobutene or mixtures of isobutene with ethylenically unsaturated comonomers in the presence of an initiator system comprising: i) a Lewis acid selected among covalent metal-halogen compounds and covalent semimetal-halogen compounds; ii) at least one aprotic organic compound (I) having at least one functional group (FG) which, under polymerization conditions, forms a carbocation or a cationogenic complex with the Lewis acid, in an organic solvent that is inert to the Lewis acid. The inventive method is characterized in that the polymerization is carried out in a tubular continuous flow reactor that has a number of bends with an alternating bending direction.
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公开(公告)号：EP1353882A1
公开(公告)日：2003-10-22
申请号：EP02702249.0
申请日：2002-01-10
发明人： KELLER, Harald , JAHNS, Ekkehard , LACH, Christian , HÜFFER, Stephan , STÖCKELMANN, Elmar , THOMANN, Yi , FRECHEN, Thomas
CPC分类号： C09D1/00 , C03C17/007 , C03C2217/42
摘要： The invention relates to a method for rendering surfaces resistant to soiling. The method is characterized in that the surfaces are coated with particles, which have an average diameter ranging from 3 nm to 5 νm and which are comprised of a material that has a surface energy of at least 20 mN/m.
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