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    • 46. 发明公开
    • One component thermoset composition
    • 一种组分热固性组合物
    • EP0130389A3
    • 1986-08-13
    • EP84106262
    • 1984-06-01
    • W.R. GRACE & CO.
    • Shiow, Ching Lin
    • C08G18/62C08G18/10C08G18/08C08L75/04C09J05/06C09K03/10C09J03/16C09D03/72C08F283/00C08L63/00C08L29/00C08L63/10
    • C09K3/1021C08G18/08C08G18/10C08G18/6212C08G18/6216C08G18/63C08G2190/00C08G2270/00C08L63/00C08L75/00C09J175/00C09K3/10C09K2200/0622C09K2200/0625C09K2200/0627C09K2200/0647C08L63/10C08G18/62C08L2666/14
    • @ This invention relates to a one component thermosettable reactive plastisol composition comprising
      (1) at least one thermoplast in powder form containing at least two active hydrogen groups, e.g., polyvinyl acetals, polyvinyl alcohol, acrylic or methacrylic acid copolymers, acrylamides, hydroxyethyl acrylate or methacrylate copolymer; (2) a liquid plasticizer having isocyanate or blocked isocyanate terminal groups, either per se or in combination with a plasticizer group member selected from the group consisting of
      (a) an acrylate terminated monomer, oligomer or propolymer, (b) an epoxide resin containing more than one epoxide group per molecule, and (c) a mixture of (a) and (b). The composition can optionally also contain a conventional accelerator for the reaction between isocyanate and active hydrogen groups as well as latent curing agents for the epoxide resin and free radical thermal initiators for the acrylate terminated monomer, oligomer or prepolymer. The composition is useful as an adhesive, sealant or coating and when heated at or above its fluxing temperature acquires good handling strength due to plasticization and good structural strength after heat curing. Further curing on aging is obtained through the reaction of moisture with any isocyanate residue.
    • 本发明涉及单组分可热固反应性增塑溶胶组合物,其包含(1)至少一种含有至少两个活性氢基团的粉末形式的热塑性塑料,例如聚乙烯醇缩醛,聚乙烯醇,丙烯酸或甲基丙烯酸共聚物,丙烯酰胺,丙烯酸羟乙酯或甲基丙烯酸羟乙酯 共聚物; (2)具有异氰酸酯或封端的异氰酸酯端基的液体增塑剂本身或与选自(a)丙烯酸酯封端的单体,低聚物或聚合物的增塑剂基成员组合,(b)含有 每分子多于一个环氧基,和(c)(a)和(b)的混合物。 组合物还可任选地含有用于异氰酸酯和活性氢基团之间的反应的常规加速剂以及环氧树脂的潜在固化剂和用于丙烯酸酯封端的单体,低聚物或预聚物的自由基热引发剂。 该组合物可用作粘合剂,密封剂或涂料,并且当在其熔化温度以上加热时,由于增塑而获得良好的处理强度,并且在热固化后具有良好的结构强度。 通过水分与任何异氰酸酯残基的反应可获得老化的进一步固化。