PTC composition and manufacturing method therefor

Details PTC composition and manufacturing method therefor PTC composition and manufacturing method therefor

1992-09-15

1994-12-20

Berman, Susan W.

Compositions

Electrically conductive or emissive compositions

Elemental carbon containing

252512, 524113, 524495, 524543, 524563, 522 75, 522153, 522154, C08K 304, C08K 308

Patent

active

053743792

ABSTRACT:
A method for making a PTC element grafts a crystalline polymer to conductive particles to form a PTC composition. The step of grafting including solution polymerization. The PTC composition is formed into a PTC element. The PTC element is cross-linked after forming. The PTC element according to this invention exhibits superior PTC behavior when the temperature of the PTC element reaches the crystal melting point of the crystalline polymer.

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patent: 4775778 (1988-10-01), von Konynenburg et al.
patent: 5190697 (1993-03-01), Ohkita et al.
patent: 5280263 (1994-01-01), Sugaya

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