申请人:NIPPON ZEON CO., LTD.
公开号:EP0778029A1
公开(公告)日:1997-06-11
A material composition comprising (a) a polyfunctional isocyanate, (b) a compound having MW of 600-3,500 and two functional groups polymerizable with an isocyanate group, (c) a compound having MW below 500 and two functional groups polymerizable with an isocyanate group, and (d) a compound having MW below 700 and at least three functional groups polymerizable with an isocyanate group. A shaped polymeric material is made by mixing and heating (a) with part of (b) to give a prepolymer, adding the remainder of (b), (c) and (d) to the prepolymer, and then heating the mixture to effect additional polymerization of (a), (b), (c) and (d). The shaped polymeric material has enhanced tear strength, tensile strength and elongation, reduced permanent set and low toxicity, and suitable for parts for which high stretchability is required.
一种材料组合物,包括(a)多官能团异氰酸酯,(b)分子量为 600-3,500 和两个官能团可与异氰酸酯基团聚合的化合物,(c)分子量低于 500 和两个官能团可与异氰酸酯基团聚合的化合物,以及(d)分子量低于 700 和至少三个官能团可与异氰酸酯基团聚合的化合物。将(a)与部分(b)混合并加热,得到预聚物,将(b)、(c)和(d)的剩余部分加入预聚物,然后加热混合物,使(a)、(b)、(c)和(d)进一步聚合,即可制成定型聚合物材料。成型聚合材料具有更高的撕裂强度、拉伸强度和伸长率,减少了永久变形,毒性低,适用于需要高拉伸性的部件。