发明名称 |
Verfahren zur Herstellung von Copolymerisaten aus Alkylmethacrylat, Vinylaromaten und Maleinsäureanhydrid |
摘要 |
In a process for preparing copolymers through bulk polymerisation, from monomer mixtures made up of: (m1) 50 to 90 wt.% of alkylmethacrylate having 1 to 6 carbon atoms in the ester group, (m2) 5 to 25 wt.% of at least one vinyl aromatic substance, (m3) 1 to 25 wt.% of of maleic acid anhydride, as well as optionally (m4) O to 5 wt.% of alkylacrylate having 1 to 6 carbon atoms in the ester group, the sum of the monomer units (m1), (m2), (m3) and, optionally, (m4) being 100 wt.%, in the presence of polymerisation initiators and molecular weight regulators, the maleic acid anhydride (m3) is added, in the liquid state, to the other monomers before polymerisation. Preferably, in a first stage before polymerisation, mixtures of monomer units (m1) / (m3) are prepared in weight ratios of between 75/1 and 75/25 which are added in a second stage to the other monomer units (m2) and, optionally (m4). Methylmethacrylate is preferred as monomercomponent (m1) and styrene and/or alpha -methyl-styrene is preferred as monomer component (m2).
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申请公布号 |
DE4440219(A1) |
申请公布日期 |
1996.05.15 |
申请号 |
DE19944440219 |
申请日期 |
1994.11.10 |
申请人 |
ROEHM GMBH, 64293 DARMSTADT, DE |
发明人 |
BECK, JUERGEN, 64625 BENSHEIM, DE;RUEPPEL, MONA, 64739 HOECHST, DE;SIOL, WERNER, DR., 64297 DARMSTADT, DE;WICKER, MICHAEL, DR., 64342 SEEHEIM, DE |
分类号 |
C08F2/02;C08F220/12;(IPC1-7):C08F220/18;C08F222/06 |
主分类号 |
C08F2/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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