气相二氧化硅改造汽车顶棚骨架成型胶粘剂性能的研究

Properties of automobile roof framework molding adhesive modified with gas silica

分别添加0.05%、0.10%、0.15%和0.20%的疏水性气相二氧化硅来改造汽车顶棚湿法制造用聚氨酯单组分湿固化无溶剂的胶粘剂性能。结果发现:气相二氧化硅能同时改善其开放性、反应性、初粘强度并能调节黏度;当添加量为0.20%时,开放时间可延长30 min,固化时间可缩短11.7%,50℃黏度提升了83%,初粘强度提升了10%。

The wet curing solvent-free adhesive of polyurethane single component was made by adding 0.05%,0.10%,0.15%and 0.20%hydrophobic gas silica,respectively.Results showed that the adhesive could improve the contradictory opening,reactivity,initial strength and adjust viscosity.When the addition amount was 0.20%,the opening time could be prolonged for 30 min,the curing time could be shortened by 11.7%,the viscosity of 50℃could be increased by 83%,and the initial adhesion strength could be increased by 10%.