摘要
通过改变羧基(-COOH)含量、异氰酸酯基(-NCO)与羟基(-OH)的摩尔比(R值)、交联剂用量,考察了它们对聚氨酯乳液性能及复合薄膜T型剥离强度的影响。结果表明:粘度随-COOH含量的增大而增大; 随R值的增大先增大后减小,当R值=1．1时体系粘度最大。R值或-COOH含量发生变化,T型剥离强度也跟着发生改变。并且,交联剂能起到提高T型剥离强度的作用,且当交联剂含量为9％最佳。
The effects of the content of carboxyl（COOH）,the molar ratio of -NCO and -OH（R value） and the content of crosslinking agent on the properties of aqueous polyurethane （PU）and T peel strength were discussed in this article. It was found that the viscosity of aqueous PU increased with -COOH increasing; with the R value increasing,the viscosity of aqueous PU first increased then minished. When R value was 1.1 ,the viscosity was biggest,T peel strength was also changed by changing the content of- COOH or R value. Moreover,the cross linker and T peel strength was discussed and it was found that T peel strength increased ,and the appropriate content of cross linking agent was 9%.
出处
《中国胶粘剂》
CAS
2006年第1期30-32,共3页
China Adhesives
关键词
水性聚氨酯
T型剥离强度
交联荆
aqueous polyurethane
T peel strength
Crosslinking agent
