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    • 7. 发明公开
    • Benzotriazole stabilizers for polyols and polyurethane foam
    • 苯并三唑 - 稳定剂聚酯和聚氨酯泡沫塑料
    • EP0839861A2
    • 1998-05-06
    • EP98101040.8
    • 1998-01-22
    • R.T. VANDERBILT COMPANY, Inc.
    • Suhoza, Richard A.Karol, Thomas J.Talbot, James J.
    • C08K5/3475
    • C08K5/18C08K5/3475C08L75/00
    • Polyether and polyester poloyols and polyurethane foams are stabilized by including therein stabilizers selected from (1) diphenylaminomethylbenzotriazole substituted by alkyl or phenylalkyl groups or (2) synergistic compositions consisting of (a) benzotriazole or alkylbenzotriazole and (b) secondary aromatic amine substituted by alkyl or phenylalkyl groups wherein the benzotriazole and amine is present in critical ratios.
      Furthermore, a method is disclosed for preparation of polyurethane foams from polyols and polyisocyanate that have reduced discoloration due to scorch by adding diphenylamino methylbenzotriazole or compositions of benzotriazole and secondary aromatic amine as scorch inhibitors to the polyol, foaming the polyol and curing.
    • 通过在其中包括选自(1)由烷基或苯基烷基取代的二苯基氨基甲基苯并三唑的稳定剂或(2)由(a)苯并三唑或烷基苯并三唑组成的协同组合物和(b)被烷基取代的仲芳族胺,稳定聚醚和聚酯泡沫和聚氨酯泡沫, 苯基烷基,其中苯并三唑和胺以临界比存在。 此外,公开了一种从多元醇和多异氰酸酯制备聚氨酯泡沫的方法,其通过加入二苯基氨基甲基苯并三唑或苯并三唑和仲芳族胺的组合物作为焦烧剂至多元醇,使多元醇发泡和固化而引起焦烧,从而减少了变色。