高固含量水性聚氨酯分散体的合成  

SYNTHESES OF HIGH SOLID CONTENT WATERBORNE POLYURETHANE DISPERSION

作　　者：瞿金清[1] 陈焕钦[1] 

机构地区：[1]华南理工大学化学工程研究所,广东广州510640

出　　处：《化工学报》2003年第6期868-871,共4页CIESC Journal

摘　　要：A series of waterborne polyurethane (WPU) dispersions were synthesized from isophorone diisocyanate (IPDI), polyester glycol (T 1136) and dimethylolpropionic acid (DMPA) via prepolymer mixture. It was found that the solid content, hydrolytic stability of PU emulsion and the cold crack properties of the cast film of WPU could be improved by using polyester and polyether as soft segment. The mechanical properties of the cast film increased and the elongation at break decreased with increasing content of hard segment and NCO/OH ratio. The water resistance, solvent resistance and wetting rub properties of the cast film of WPU would be improved by increasing the amount of TMP. Testing of the cast film showed natural gloss with silky hand feel, excellent adhesion and cold crack properties, water resistance, solvent resistance, and rub resistance at 40% hard segment content, 1.3-1.5 of NCO/OH ratio and 3%-5% of TMP content.A series of waterborne polyurethane (WPU) dispersions were synthesized from isophorone diisocyanate (IPDI), polyester glycol (T 1136) and dimethylolpropionic acid (DMPA) via prepolymer mixture. It was found that the solid content, hydrolytic stability of PU emulsion and the cold crack properties of the cast film of WPU could be improved by using polyester and polyether as soft segment. The mechanical properties of the cast film increased and the elongation at break decreased with increasing content of hard segment and NCO/OH ratio. The water resistance, solvent resistance and wetting rub properties of the cast film of WPU would be improved by increasing the amount of TMP. Testing of the cast film showed natural gloss with silky hand feel, excellent adhesion and cold crack properties, water resistance, solvent resistance, and rub resistance at 40% hard segment content, 1.3-1.5 of NCO/OH ratio and 3%-5% of TMP content.

关 键 词：水性聚氨酯分散体 合成 性能 高固体含量 交联剂 

分 类 号：TQ630.1[化学工程—精细化工]