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    • 2. 发明授权
    • Toner binder for electrophotography
    • 电子印刷用电子胶带
    • US5242777A
    • 1993-09-07
    • US796637
    • 1991-11-22
    • Tomohisa KatoShigeo OchiaiTakashi Niinae
    • Tomohisa KatoShigeo OchiaiTakashi Niinae
    • G03G9/087
    • G03G9/08711G03G9/08706G03G9/08755
    • A toner binder for electrophotography is provided whose minimum fixing temperature is low, image offsetting temperature to the heat-roll is high, and whose stability upon storage is good.The toner binder comprises a thermoplastic resin (I) of 10 to 50% by weight, i.e., a copolymer having a structural unit consisting of a styrene series monomer and a (meth)acrylic monomer, having a molecular weight of more than 30,000 when fractionated by gel permeation chromatography, having a glass transition temperature of -20.degree. to +40.degree. C.; and a thermoplastic resin (II) of 10 to 50% by weight, i.e., a polymer selected from a copolymer (II-a) of a vinyl monomer selected from group consisting of styrene and substituted styrenes, a copolymer (II-b) having a structural unit consisting of styrene series monomers and (meth)acrylic monomers, polyester resin (II-c), and a copolymer (II-d) including a moiety of a copolymer (II-b) and a moiety of a polyester resin (II-c). The toner binder has a molecular weight up to 30,000 when fractionated by gel permeation chromatography, and a glass transition temperature of 50.degree. to 100.degree. C. These thermoplastic resins are blended to exhibit a difference of 25.degree. to 100.degree. C. between the respective glass transition temperatures thereof.
    • 提供了一种用于电子照相的调色剂粘合剂,其最低定影温度低,对热辊的图像偏移温度高,并且其储存稳定性良好。 调色剂粘合剂包含10至50重量%的热塑性树脂(I),即具有由苯乙烯系单体和(甲基)丙烯酸单体组成的结构单元的共聚物,其分子量分数大于30,000时的分子量 通过凝胶渗透色谱法,玻璃化转变温度为-20℃至+ 40℃。 以及10〜50重量%的热塑性树脂(II),即选自苯乙烯和取代苯乙烯组成的组的乙烯基单体的共聚物(II-a)中的聚合物,共聚物(II-b),具有 包含苯乙烯系单体和(甲基)丙烯酸类单体,聚酯树脂(II-c)和包含共聚物(II-b)部分和聚酯树脂部分的共聚物(II-d) II-c)。 调色剂粘合剂通过凝胶渗透色谱法分馏,分子量高达30,000,玻璃化转变温度为50至100℃。这些热塑性树脂被共混以在各自之间显示25℃至100℃之间的差异 玻璃化转变温度。