发明授权
- 专利标题: Dewatering of water-moist graft rubber
- 专利标题(中): 水湿移植橡胶脱水
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申请号: US736439申请日: 1996-10-24
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公开(公告)号: US5817266A公开(公告)日: 1998-10-06
- 发明人: Norbert Guntherberg , Jurgen Hofmann , Hilmar Ohlig , Elmar Mailahn , Friedrich Seitz , Hermann Gausepohl , Jurgen Koch , Andreas Deckers
- 申请人: Norbert Guntherberg , Jurgen Hofmann , Hilmar Ohlig , Elmar Mailahn , Friedrich Seitz , Hermann Gausepohl , Jurgen Koch , Andreas Deckers
- 申请人地址: DEX Ludwigshafen
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DEX Ludwigshafen
- 优先权: DEX4402394.4 19940127
- 主分类号: B29C47/00
- IPC分类号: B29C47/00 ; B29C47/78 ; B29C47/40 ; B29C47/76
摘要:
Essentially dry materials are obtained by mechanically dewatering water-moist rubber, prepared by emulsion polymerization and precipitation, to give a compact material having a rubber content of at least 50%, by a process in which the previously dewatered rubber is fed to the feed section of a twin-screw extruder which has screws rotating in the same direction and possesses, in succession in the conveying direction, at least two back-up zones and two associated dewatering orifices, each of which may be provided with a retaining screw, and at least one kneading zone, one devolatilization zone and finally one discharge zone, which may be closed by a die lip, and the water separated off is discharged at the dewatering orifices in liquid form.
公开/授权文献
- US5266654A Resin composition 公开/授权日:1993-11-30