聚醚型水性聚氨酯胶黏剂的研究  

Study on Polyether Waterborne Polyurethane Adhesive

作　　者：吉婉丽[1] 龚燕燕[1] 夏德慧[1] 徐欣欣[1] 石磊[1] 文远海[1] 

机构地区：[1]西安工程大学纺织与材料学院,陕西西安710048

出　　处：《化学与粘合》2007年第5期332-335,共4页Chemistry and Adhesion

摘　　要：以聚醚二醇、二异氰酸酯和二羟甲基丙酸（DMPA）为基本原料制备了一种稳定的聚醚型阴离子水性聚氨酯胶黏剂。探讨了通过改变NCO／OH的摩尔（R）比例，交联剂三羟甲基丙烷（TMP）及DMPA含量对乳液性能、贮存稳定性、体系力学性能、耐水性和粘接性的影响。结果表明：随着R值的增加乳液的性能变差；随着COOH％的增加，胶膜的吸水性逐渐增大，但吸水性随着R值或交联剂用量增加而减小；R值或COOH％发生变化，T剥离强度也跟着发生变化；交联剂能提高剥离强度，含量为0．81％为最佳。所以当NCO／OH=2．5、COOH％=1．28-1．55、TMP％=0．81-1．63时，合成的水性聚氨酯胶黏剂样品性能最佳。A stable polyether anionic waterborne polyurethane adhesive was prepared with polyether did, diisocyanate and dimethylol propionie acid （DM- PA） as raw materials. The effect of the content of trimethylol propane （TMP） and DMPA, and the molar ratio （ R ） of NCO to OH on emulsion properties, storage stability, water- resistance, and adhesive strength of water- borne polyurethane were discussed. The results showed that the emulsion properties became worse with the rising R value; with increasing COOH%, the water absorption gradually increased, but decreased with the rising R value, or content of crosslinking agent; T-type peel strength was changed with the change of the COOH% and R value respectively. The crosslinking agent could improve the T -type peel strength and its optimal content was 0.81%. So when the content of TMP and COOH% was 0.81 - 1.63and 1.28 - 1.55respectively, and the ratio of NCO to OH was 2.5, the water -borne polyurethane adhesive prepared had excellent property.

关 键 词：水性聚氨酯 阴离子 胶黏剂 

分 类 号：TQ433.432[化学工程]