| 摘要 |
PURPOSE:To enhance dispersibility of carbon black and pulverization of other flame retarder mixed together with carbon black, by incorporating a polymer having a brominated aromatic compound and a brominated aromatic derivative as repeating units, as a flame retarder in an electric heat generating resistor layer. CONSTITUTION:At least an electric heat generating resistor layer and an ink layer are provided. A polymer having as repeating units a brominated aromatic compound and or a brominated aromatic derivative, having at least two aromatic groups, preferably a polymer having brominated phenol and/or a brominated phenol derivative as a repeating unit is incorporated in the resistor layer in an amount of 1-40 pts.wt. The repeating unit in the polymer is represented by formula (I), wherein (a) is an integer of 1-4, (b) is an integer of 1 or 2, (c) is an integer of 0-5, while a+b+c=5, Br is a bromine atom bonded to a carbon atom in the aromatic ring, H is a hydrogen atom bonded to a carbon atom in the aromatic ring, and Z is an oxygen atom bonded to a carbon atom in the ring and a carbon atom in another aromatic ring. |
