Preparation of amino silicone softener modified by polyurethane prepolymer

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 emulsifying conditions were: AEO-3 and AEO-9 as compound emulsifier,HLB of 12,emulsified at 20 ℃,pH of 5,900 r / min and the amount of pentanol of 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 commercial softeners. The results showed that the hydrophilicity of fabric finished with PAS improved obviously compared with domestic and oversea amino silicone products and the softness was almost the same. The comprehensive performances were equavlent to imported softener 2.