摘要
以聚酯多元醇、多异氰酸酯、松香类增粘树脂、催化剂、黏度稳定剂和水解稳定剂等为原料,制备了反应型聚氨酯热熔胶(PUR)。考察了黏度稳定剂、水解稳定剂对PUR性能的影响。结果表明,当选用多聚磷酸为黏度稳定剂,用量为80 mg/kg时制备的热熔胶黏度稳定性最好,在120℃加热8 h后,熔融黏度较初始值仅增加6.4%;环氧化合物GE500的抗水解效果比碳化二亚胺低聚物P200的好,水解稳定剂GE500质量分数为2.0%时,PUR粘接试件在100℃、相对湿度95%的老化箱中放置7 d后,粘接强度保持率仍可达52%。
Reactive polyurethane hot-melt adhesives(PUR)were prepared with polyester polyols,polyisocyanate,rosin tackifying resin,catalyst,viscosity stabilizer and hydrolysis stabilizer,etc.The effects of viscosity stabilizer and hydrolysis stabilizer on properties of PUR were studied.The results showed that PUR had the best viscosity stability when the viscosity stabilizer was polyphosphoric acid and the amount was 80 mg/kg,the melt viscosity of PUR increased by only 6.4%compared with the initial value after 8 hours heating at 120℃.Compared with the carbodiimide oligomer P200,epoxy compounds GE500 had better anti-hydrolysis stability.The bonding strength retention rate of PUR was still reached 52%after 7 days storage at an ageing test chamber with 100℃and 95%RH when the amount of GE500 was 2.0%.
作者
陈精华
石俊杰
张健臻
陈建军
黄恒超
CHEN Jinghua;SHI Junjie;ZHANG Jianzhen;CHEN Jianjun;HUANG Hengchao(Guangzhou Baiyun Chemical Industry Co.Ltd,Guangzhou 510540,China)
出处
《聚氨酯工业》
北大核心
2018年第2期37-39,共3页
Polyurethane Industry
基金
广州市产学研协同创新重大专项(201604010060)
关键词
反应型聚氨酯热熔胶
黏度稳定剂
水解稳定剂
reactive polyurethane hot-melt adhesive
viscosity stabilizer
hydrolysis stabilizer
