摘要
探讨了氢氧化铝、三聚氰胺、DMMP、TCEP的阻燃机理及阻燃效果 ,并对几种阻燃剂进行了复配使用 ,同时对聚异氰脲酸酯指数对燃烧性能的影响进行了研究。结果表明 ,DMMP的阻燃效果最好 ,当其用量为 9份时 ,就能达到国家标准B2 级。不同阻燃剂复合使用 ,其协同效应显著。在聚异氰脲酸酯泡沫中 ,随着异氰酸酯指数的升高 ,泡沫的阻燃性变好 ,当异氰酸酯指数为 3.0时 ,泡沫的阻燃级别达到国家标准B2 级。以混合聚醚多元醇 70份、聚酯多元醇 30份、异氰酸酯指数 1 .2 0、硅油稳定剂 2份、复合催化剂 1份、发泡剂HCFC 1 4 1b 2 0份与水 1份、复合阻燃剂 1 2份等为基础配方 ,所得泡沫密度约为 32kg/m3,压缩强度约 1 70kPa ,阻燃性能符合国家标准GB/T 86 2 4 - 97B2级 。
The retarding character and retarding mechanism of main flame retardants including DMMP、TCEP、Al(OH) 3、melamine and mixture of fire retardants are presented. At the same time the effect of gradient of polyisocyanurate on flame retardancy is studied. The results show that retarding effect of DMMP is better than other fire retardants and the foam retardancy is accord with Class B 2 when concentration of DMMP is 9 phr. The performances of the foam prepared from a mixt of polyether polyol 70, polyester polyol 30, isocyanate index 1.20, foam stabilizer 2, compound catalyst 1, blowing agent HCFC 141b 20 and H 2O 1, compound flame retardant 12 are as: density 32 kg/m 3, compressive strength 170 kPa. The foam retardancy is accord with class B 2 of GB/T 8624-97 and dimensional stability is good.
出处
《聚氨酯工业》
2004年第2期17-20,共4页
Polyurethane Industry
