Abstract: Amino silicone were synthesized and modified with polyurethane preppolymer(PUP) by blending emulsification to get softener, which can improve the hydrophilicity of amino silicone. The types of surfactants, HLB, emulsification temperature, pH, mechanical agitation and amount of cosurfactant were investigated to get stable emulsion. The optimized conditions were: AEO-3 and AEO-9 as compound emulsifier, HLB was 12, emulsified at 20℃, pH was 5, 900r/min and the amount of pentanol is 5% based on the weight of amino silicone and polyurethane. Then the PUP modified amino silicone emulsion(PAS) was used on cotton fabrics. Whiteness, friction coefficient, hydrophilicity and hand feeling were tested to find out the differences among textiles finished with PAS and the commercial softeners. The results showed that the hydrophilicity of fabric finished with PAS improved obviously compared to domestic amino silicone product and the softness was almost the same. The comprehensive performances were like imported softener 2.

Key words: amino-silicone, polyurethane prepolymer, blending emulsification, softeness, hydrophilicity