Preparation method of organic silicon-modified polyurethane copolymer fabric softener
A fabric softener, polyurethane prepolymer technology, applied in the direction of improved hand-feeling fibers, light-fast fibers, and liquid-repellent fibers, can solve the problems of reducing whiteness of white fabrics, oil stains, demulsification, etc. , to achieve the effect of good transportation and use stability, maintaining color and brightness, and excellent wearing comfort
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Embodiment 1
[0013] Embodiment 1, concrete steps are:
[0014] a) Add 37.5g polyoxypropylene diol (molecular weight 1800), 22.5g hydroxypropyl polysiloxane (molecular weight 2600), 39.82g hexamethylene diisocyanate (HDI) in a dry and clean reactor, add The catalyst was 0.18 g of dibutyltin dilaurate, and stirred and reacted at 80° C. for 2 h to obtain an isocyanate-terminated silicone-modified polyurethane prepolymer.
[0015] b) Continue to add 1.5 g of triethylamine chain extender, and react with stirring at 55° C. for 2.0 h to obtain a silicone-modified polyurethane interpolymer.
[0016] c) Mix the prepared copolymer with 8g of isomeric C12~C13 fatty alcohol polyoxyethylene ether (6EO) and 6g of isomeric C12~C13 fatty alcohol polyoxyethylene ether (8EO) at 70°C, and then within 30 minutes 450g of deionized water was evenly added dropwise for emulsification to obtain a silicone-modified polyurethane copolymer softener.
Embodiment 2
[0017] Embodiment 2, concrete steps are:
[0018] a) Add 43.35g polyethylene glycol (molecular weight 1200), 15.5g hydroxyethyl polysiloxane (molecular weight 1500), 41.02g isophorone diisocyanate (IPDI) in a dry and clean reactor, add catalyst 0.13 g of stannous octoate was stirred and reacted at 75° C. for 2.5 h to obtain an isocyanate-terminated silicone-modified polyurethane prepolymer.
[0019] b) Continue to add 0.8 g of diethylamine chain extender, and react with stirring at 50° C. for 1.5 h to obtain a silicone-modified polyurethane interpolymer.
[0020] c) Mix the prepared copolymer with 4.0g of isomeric C12-C13 fatty alcohol polyoxyethylene ether (7EO) at 60°C, and then add 200g of deionized water evenly within 30 minutes for emulsification to obtain a silicone-modified Polyurethane copolymer softener.
[0021] Softener application effect test see Table 1:
[0022] Table 1 Comparison of the effect of the softening agent of the present invention and the commercial...
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