发明授权
- 专利标题: Process for the preparation of alpha-methylstyrene polymers
- 专利标题(中): 制备α-甲基苯乙烯聚合物的方法
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申请号: US859056申请日: 1992-03-27
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公开(公告)号: US5266642A公开(公告)日: 1993-11-30
- 发明人: Karl-Erwin Piejko , Ralph Ostarek , Christian Lindner
- 申请人: Karl-Erwin Piejko , Ralph Ostarek , Christian Lindner
- 申请人地址: DE Leverkusen
- 专利权人: Bayer Aktiengesellschaft
- 当前专利权人: Bayer Aktiengesellschaft
- 当前专利权人地址: DE Leverkusen
- 优先权: DEX4111388 19910409
- 主分类号: C08F2/22
- IPC分类号: C08F2/22 ; C08F2/24 ; C08F2/44 ; C08F4/40 ; C08F212/10 ; C08F212/12 ; C08F220/42 ; C08F220/44 ; C08F257/02 ; C08F285/00 ; C08F265/04 ; C08F283/12
摘要:
An improved process for the preparation of .alpha.-methylstyrene polymers by aqueous emulsion polymerization in which a styrene monomer mixture is first polymerized in a quantity of from 0.5 to 8% by weight of the total quantity of monomers and thereafter an .alpha.-methylstyrene monomer mixture is polymerized batchwise or semi-continuously.
公开/授权文献
- US5911361A Viscous heater 公开/授权日:1999-06-15
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