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发明授权
CN105431299B 热透明层合供体元件 有权

热透明层合供体元件
摘要：
一种具有聚合载体的热转移供体元件，所述聚合载体的至少一部分涂布有热可转移保护性透明膜。此膜包含：(1)至少50‑70重量％的量的聚(乙烯基缩乙醛)，(2)第二聚合物和(3)胶态二氧化硅。另外，(a)所述第二聚合物的分子量大于所述(乙烯基缩乙醛)的分子量，(b)所述聚(乙烯基缩乙醛)与所述第二聚合物的重量比为至少5:1并且至多并且包括12:1，(c)胶态二氧化硅与所述第二聚合物的重量比为至少1.5:1并且至多并且包括3:1，且(d)按总热可转移保护性透明膜干燥重量计，胶态二氧化硅的量为至少10重量％并且至多并且包括20重量％。
摘要（英）：

A thermal transfer donor element has a polymeric support having at least a portion thereof coated with a thermal transferable protective transparent film. This film comprises: (1) a poly(vinyl acetal) in an amount of at least 50-70 weight %, (2) a second polymer, and (3) colloidal silica. In addition, (a) the molecular weight of the second polymer is greater than the molecular weight of the poly(vinyl acetal), (b) the weight ratio of the poly(vinyl acetal) to the second polymer is at least 5:1 and up to and including 12:1, (c) the weight ratio of colloidal silica to the second polymer is at least 1.5:1 and up to and including 3:1, and (d) the amount of colloidal silica is at least 10 weight % and up to and including 20 weight %, based on total thermal transferable protective transparent film dry weight.

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