高寒带铁路路基融洞填充用单组分聚氨酯泡沫填缝剂  

Preparation of Polyurethane Foam for Filling the Thawing Holes of Railway Roadbed in High Cold Area

作　　者：张世泽[1] 姜志国[1] 张瑶[1] 刘唯平 王乐然[2] 刘伟斌[2] 

机构地区：[1]北京化工大学,北京100029 [2]中国铁道科学研究院,北京100081

出　　处：《聚氨酯工业》2015年第4期26-28,36,共4页Polyurethane Industry

摘　　要：研究了聚醚多元醇品种及其配比、异氰酸酯指数、催化剂用量对聚氨酯泡沫填缝剂材料性能的影响．确定了较佳的原料配比为：采用丙丁烷混合气和DME混合物（质量比1／1）作为抛射剂、料气质量比4／1、聚醚三醇MN．700与聚醚二醇DDL-1000D的摩尔比在3／2～1／1之间、异氰酸酯指数4．25。4．50、催化剂DMDEE的用量2—3份（相对于100份聚醚多元醇）。制备的聚氨酯泡沫材料达到如下性能：发泡倍率≥15，压缩强度（10％）≥0．85MPa，土壤粘接剪切强度≥0．85MPa，导热系数≤0．05W／（m·K）。基本满足高寒带铁路路基融洞填充使用要求。The influences of polyether triol/diol ratio ,isocyanate index, the amount of catalyst on properties of one-component polyurethane foam were studied. The better usage of raw materials was obtained as below. The mix- ture of propane/butane mixture and dimethyl ether with mass ratio 1/1 was used as an aerosol propellant. The mass ratio of polyurethane and aerosol propellant was 4/1. The mole ratio polyether triol MN 700 and polyether diol DDL- 1000D was between 3/2 and 1/1. The isocyanate index was 4. 25-4. 50, and the mass ratio of the catalyst DMDEE and polyether polyols was （2-3）/100. The prepared polyurethane foam had the following properties： the foaming ratio ≥15, the compressive strength （10%） ≥0. 85 MPa, the shear strength to soil ≥0. 85 MPa, the thermal con- ductivity ≤ 0. 05 W/（ m K）. The polyurethane foam could basically satisfy the use requirement of filling the tha- wing holes of railyway bedroad in high cold area.

关 键 词：融洞填充 聚氨酯泡沫塑料 填缝剂 单组分泡沫塑料 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]