摘要
对单组分聚氨酯密封胶耐热性能进行了研究,实验了不同分子质量的聚醚多元醇、扩链剂、抗氧剂、异氰酸酯三聚体对其耐热性能的影响。提高聚醚多元醇分子质量、提高交联度、加入抗氧剂和异氰酸酯三聚体对耐热性能有明显改善,可以使密封胶固化后在较高的温度下保持优异的机械性能。
In this paper, the heat-resistance of one-component polyurethane sealant were studied. It was tested that the influence of polyether polyol, chain extender, antioxidant and isocyanates trimerization on the heat-resistance of one-component polyurethane sealant. Increase the molecular weight and the degree of crosslinking, add antioxidant and isocyanates trimerization could improve the heat-resistance, it will give the sealant cured excellent mechanical properties at higher temperature.
出处
《粘接》
CAS
2014年第10期43-47,共5页
Adhesion
关键词
聚氨酯
耐热性能
分子质量
扩链剂
抗氧剂
异氰酸酯三聚体
polyurethane
heat-resistance
molecular weight
chain extender
antioxidant
isocyanates trimerization
