单组分湿固化聚氨酯密封胶的表干时间研究  

Study on the Tack Free Time of One-component Moisture-curing Polyurethane Sealant

作　　者：白金[1] 赵国峥[1] 张洪林[1] 张连红[1] 

机构地区：[1]辽宁石油化工大学环境与生物工程学院,辽宁抚顺113001

出　　处：《化学与粘合》2007年第6期387-389,共3页Chemistry and Adhesion

基　　金：国家863计划基金项目(编号2005AA001510)

摘　　要：单组分湿固化密封胶由于使用方便,性能优良而被广泛应用。对其合成工艺进行了说明,并就其表干时间进行了分析研究。通过实验发现催化剂、脱水剂、增塑剂以及游离的异氰酸酯含量对密封胶的表干时间有很大的影响。实验结果表明,当催化剂的比例在0.1%,脱水剂适量,增塑剂的添加量在13%～15%、游离的异氰酸酯含量为2.5%～3.5%时,所制得的密封胶的表干时间最佳。One component, moisture- curing PU sealant is widely utilized for its convenience and excellent properties. The preparation method is presented in this paper, and the tack free time is studied. Through the experiment, it is found that the tack free time is affected greatly by the content of catalyst, dehydrating agent, plasticizer and the free NCO. The results indicate that when the ratio of catalyst is 0.01%, dehydrating agent is proper , the content of plasticizer is 13% - 15%, and the content of free NCO is 2.5% - 3.5%, the tack free time of sealant is excellent.

关 键 词：聚氨酯密封胶 湿固化 表干时间 

分 类 号：TQ436.6[化学工程]