发明授权
- 专利标题: Antistatic or electrically conductive thermoplastic polyurethanes: process for their preparation and their use
- 专利标题(中): 抗静电或导电的热塑性聚氨酯:其制备方法及其用途
-
申请号: US620430申请日: 1984-06-14
-
公开(公告)号: US4526952A公开(公告)日: 1985-07-02
- 发明人: Gerhard Zeitler , Gerhard Bittner , Knud Faehndrich , Hans M. Rombrecht
- 申请人: Gerhard Zeitler , Gerhard Bittner , Knud Faehndrich , Hans M. Rombrecht
- 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: DEX3321516 19830615
- 主分类号: B29C70/88
- IPC分类号: B29C70/88 ; C08K3/04 ; H01B1/24
摘要:
Antistatic and/or electrically conductive thermoplastic polyurethanes contain carbon black whose surface area determined by the BET method is from 600 to 1200 m.sup.2 /g, have a dibutylphthalate absorption number of 300 to 450 cm.sup.3 /100 g, a pour density of less than 250 kg/m.sup.3, and an average particle size less than 50 nm.Incorporation of the carbon black into the thermoplastic polyurethane produced by the continuous sheet method takes place at temperatures under the primary melt peak for the crystalline rigid segments, measured by means of differential calorimetry, preferably in an extruder.The products are suitable for preparing films for flat heating elements, antistatic hoses, cables, and profiles.
公开/授权文献
- US5959720A Method for color balance determination 公开/授权日:1999-09-28