公开(公告)号：EP2265652A1

公开(公告)日：2010-12-29

申请号：EP09732684.7

申请日：2009-04-14

申请人： Ticona GmbH

发明人： HAUBS, Michael ,  HOFFMOCKEL, Michael ,  LINGNAU, Jürgen ,  ROESCHERT, Horst ,  GRONNER, Robert

IPC分类号： C08G2/08 ,  C08G2/10 ,  C08G2/28 ,  C08G2/30 ,  C08G2/34 ,  C08L59/02 ,  C08L59/04 ,  C08G2/24

CPC分类号： C08G2/04 ,  C08G2/24 ,  C08G2/34 ,  C08L59/02 ,  C08L59/04 ,  C08L2666/16

摘要： The invention relates to oxymethylene polymers which are distributed bimodally or higher and have a target low-molecular part of between 1 and 5 mass percent. Moulded bodies consisting of said polymers are characterised by high low-temperature impact strength combined with a high elasticity modululus.

公开(公告)号：EP2268684A1

公开(公告)日：2011-01-05

申请号：EP09731583.2

申请日：2009-04-14

申请人： Ticona GmbH

发明人： HAUBS, Michael ,  HOFFMOCKEL, Michael ,  LINGNAU, Jürgen ,  YEARWOOD, Michael, G. ,  GRONNER, Robert

IPC分类号： C08G2/24 ,  C08G2/34

CPC分类号： C08G2/24 ,  C08G2/04 ,  C08G2/34

摘要： The invention relates to oxymethylene copolymers having a large part of alkyl ether terminal groups, and hydroxy alkylene terminal groups. Said polymers are characterised by high thermal stability and high hot water resistence. The invention also relates to a method for producing oxymethylene copolymers, according to which the polymerisation of at least one monomer forming a -CH2-O- unit is carried out in the presence of at least one acetal of formaldehyde and at least one initiator of cationic polymerisation, the quantity of initiators of the cationic polymerisation being less than 10
-4 mol %, in relation to the quantity of monomers forming -CH
2 -O- units at the beginning of the polymerisation; starting materials of the polymerisation are selected such that the water and formic acid contents at the beginning of the polymerisation are less than 40 ppm; and the initiator and/or the active polymer chains are deactivated by treating the produced polymer with a protic solvent containing a base.