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    • 2. 发明授权
    • Modifying a wood material utilizing formaldehyde polymer and sulfur
dioxide
    • 用甲醛聚合物和二氧化硫改性木材
    • US5318802A
    • 1994-06-07
    • US49293
    • 1993-04-20
    • Hiroyuki IshikawaArihiro AdachiHiroaki Usui
    • Hiroyuki IshikawaArihiro AdachiHiroaki Usui
    • B27K3/15B27K5/00B05D7/06
    • B27K3/153C08L97/02C08K3/30C08L61/02
    • In a method of treating a raw wood material with a formaldehyde polymer in the presence of sulfur dioxide at a reaction temperature within a reaction vessel to obtain a modified wood material, sulfur dioxide is supplied into the reaction vessel when a gas pressure of the formaldehyde polymer within the reaction vessel is 4.00.times.10.sup.4 Pa or more. In addition, a concentration of the formaldehyde polymer is in a range of 30 to 350 mol/m.sup.3 of formaldehyde monomer, and a molar ratio of the formaldehyde polymer to sulfur dioxide is in a range of 10 to 350. As the formaldehyde polymer, for example, trioxane, tetraoxane, or paraformaldehyde is used. The modified wood material manufactured by the method including the above conditions shows excellent dimensional stability while a discoloration thereof is effectively prevented. Therefore, the modified wood material is particularly fit to use for an interior furniture, musical instrument and a bath tub, etc.
    • 在二氧化硫存在下,在反应容器内的反应温度下用甲醛聚合物处理生木材的方法来获得改性木材,当甲醛聚合物的气体压力 在反应容器内为4.00×10 4 Pa以上。 此外,甲醛聚合物的浓度在30〜350mol / m 3的甲醛单体的范围内,甲醛聚合物与二氧化硫的摩尔比在10〜350的范围内。作为甲醛聚合物,对于 使用三恶烷,四氧杂环己烷或多聚甲醛。 通过包括上述条件的方法制造的改性木材材料显示出优异的尺寸稳定性,同时有效地防止了其变色。 因此,改性木材特别适用于室内家具,乐器和浴缸等。