发明名称 |
Method of making a conductive polymer composition |
摘要 |
A conductive polymer composition which has a resistivity at 20 DEG C. of at most 1.0 ohm-cm and a PTC anomaly of at least 104 contains at most 64% by volume of a crystalline polymeric component and at least 36% by volume of a particulate conductive filler. A preferred conductive filler is carbon black having a DBP number of 60 to 120 cm3/100 g. Compositions of the invention, as well as other conductive polymer compositions are preferably prepared by a method in which the polymeric component and the filler are blended in a first step at a temperature greater than the melting temperature of the polymer, the mixture is then cooled, and the mixture is then mixed in a second step. The resulting composition has a PTC anomaly that is at least 1.2 times the PTC anomaly of the first mixture.
|
申请公布号 |
US5985976(A) |
申请公布日期 |
1999.11.16 |
申请号 |
US19970968634 |
申请日期 |
1997.11.12 |
申请人 |
RAYCHEM CORPORATION |
发明人 |
WARTENBERG, MARK F.;LAHLOUH, JOHN G.;TOTH, JAMES |
分类号 |
H01C7/02;(IPC1-7):C08K3/00 |
主分类号 |
H01C7/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|