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    • 6. 发明公开
    • Hydrotalcite compound, process for producing the same, infrared absorber and agricultural film
    • 水滑石化合物,其制备方法,红外吸收剂和农用薄膜
    • EP0708056A1
    • 1996-04-24
    • EP95116359.1
    • 1995-10-17
    • Fuji Chemical Industry Co., Ltd.
    • Hosokawa, TerumasaMurakami, TatuoTakadou, Kanemasa
    • C01F7/00A01G9/14
    • C01B33/24A01G9/1438C01B25/38C01B25/385C01B25/45C01B33/20Y02A40/252
    • An infrared absorber having a high infrared absorptivity is provided which is suitable for use in an agricultural film. The infrared absorber comprises as an active ingredient a hydrotalcite compound represented by the formula:

              (Mg and/or Zn) a Al₂(condensed silicate ion and/or condensed phosphate ion) m- 2/m ·bH₂O

         wherein a satisfies the relationship 2 ≦ a ≦ 8, m is an integer of 1 or greater, b satisfies the relationship b ≦ 4 and the condensed silicate ion and/or condensed phosphate ion contains at least 2 mol of Si and/or P,
         said hydrotalcite compound having a crystal surface coated with 0.1 to 10% by weight of an anionic surfactant, and
         said hydrotalcite compound having intercalated anions composed mainly of condensed silicate ions and/or condensed phosphate ions. Infrared rays whose wavelengths are in the range of 5 to 30 µm are very effectively absorbed by virtue of the structure having silicate and/or phosphate components intercalated in high proportion.
    • 提供适用于农用薄膜的具有高红外吸收性的红外吸收剂。 该红外线吸收剂含有由下式表示的水滑石化合物作为活性成分:(Mg和/或Zn)aAl 2(缩合硅酸根离子和/或缩聚磷酸根离子)m-2 / m·bH 2 O其中a满足2≤a ≤8,m为1或更大的整数,b满足关系b≤4,并且缩合硅酸盐离子和/或缩聚磷酸盐离子含有至少2mol的Si和/或P,所述水滑石化合物具有涂覆的晶体表面 具有0.1至10重量%的阴离子表面活性剂,并且所述水滑石化合物具有主要由缩合硅酸根离子和/或缩合磷酸根离子组成的嵌入阴离子。 由于硅酸盐和/或磷酸盐组分以高比例嵌入的结构,波长在5至30μm范围内的红外线非常有效地被吸收。