A kind of hyperbranched polyurethane water-repellent finishing agent and its preparation method and application
A technology of hyperbranched polyurethane and water-repellent finishing, applied in fiber treatment, liquid repellent fibers, plant fibers, etc., can solve the problem of affecting the number of long-chain fatty alcohols inserted, affecting the water-repellent effect, and less branched structure. question
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Embodiment 1
[0050] Formula of hyperbranched polyurethane water-repellent finishing agent:
[0051]
[0052] 1. Preparation
[0053] The raw materials in the above formula are prepared according to the preparation method of the present invention to prepare the hyperbranched polyurethane water-repellent finishing agent.
[0054] Concrete preparation method, the steps are as follows:
[0055] Under the protection of inert gas nitrogen, 21mol toluene diisocyanate and 21mol diethanolamine were reacted in an ice-water bath at -5°C for 0.5h, and then heated to 50°C for another 6h to obtain an -NCO group at one end and -OH at both ends. Group branched prepolymer I, add 1mol trimethylolpropane to prepolymer I, react at 80°C for 2h, and obtain prepolymer II whose outer layer is -OH group; add 23mol isophorone Mix diisocyanate, 4.5mol polysiloxane diol 1000, 6.5mol N-methyldiethanolamine, and 12mol cetyl alcohol evenly, react at 80°C for 2 hours, cool down to 40°C, and obtain a compound with -N...
Embodiment 2
[0063] Formula of hyperbranched polyurethane water-repellent finishing agent:
[0064]
[0065] 1. Preparation
[0066] The raw materials in the above formula are prepared according to the preparation method of the present invention to prepare the hyperbranched polyurethane water-repellent finishing agent.
[0067] The specific preparation method is:
[0068] Under the protection of inert gas nitrogen, 21mol toluene diisocyanate and 21mol diethanolamine were reacted in an ice-water bath at -5°C for 0.5h, and then heated to 50°C for another 6h to obtain an -NCO group at one end and -OH at both ends. Group branched prepolymer I, add 1mol trimethylolpropane to prepolymer I, react at 80°C for 2h, and obtain prepolymer II whose outer layer is -OH group; add 23mol isophorone Mix diisocyanate, 4.5mol polysiloxane diol 1000, 6.5mol dimethylol propionic acid, and 12mol cetyl alcohol evenly, react at 80°C for 2 hours, and cool down to 40°C to obtain -NCO group at one end Prepolyme...
Embodiment 3
[0076] Formula of hyperbranched polyurethane water-repellent finishing agent:
[0077]
[0078]
[0079] 1. Preparation
[0080] The raw materials in the above formula are prepared according to the preparation method of the present invention to prepare the hyperbranched polyurethane water-repellent finishing agent.
[0081] The specific preparation method is:
[0082] Under the protection of inert gas nitrogen, 21mol toluene diisocyanate and 21mol diethanolamine were reacted in an ice-water bath at -5°C for 0.5h, and then heated to 50°C for another 6h to obtain an -NCO group at one end and -OH at both ends. Group branched prepolymer I, add 1mol trimethylolpropane to prepolymer I, react at 80°C for 2h, and obtain prepolymer II whose outer layer is -OH group; add 23mol isophorone Mix diisocyanate, 4.5mol polysiloxane diol 1000, 6.5mol N-methyldiethanolamine, and 12mol docosanol evenly, react at 80°C for 2 hours, and cool down to 40°C to obtain -NCO group at one end Prep...
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