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

Active Publication Date: 2020-10-27
BEIJING CTA TEX CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent 200910016097.4 discloses a method for synthesizing a two-component polyurethane hyperbranched curing agent. During the preparation process, no small molecule polyol is introduced as a nucleus, so that the branched structure is relatively small, which affects the number of long-chain fatty alcohols inserted in the later period, thereby affecting the rejection water effect
Patent 201510718588.9 discloses a preparation method of a new type of silicone water-repellent agent, but this silicone water-repellent agent needs to be diluted with some organic solvents later, which does not meet environmental protection requirements

Method used

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  • A kind of hyperbranched polyurethane water-repellent finishing agent and its preparation method and application
  • A kind of hyperbranched polyurethane water-repellent finishing agent and its preparation method and application
  • A kind of hyperbranched polyurethane water-repellent finishing agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses a hyperbranched polyurethane water-repellent finishing agent, and a preparation method and application thereof. The structural general formula of the hyperbranched polyurethanewater-repellent finishing agent is shown as the formula 1, wherein a is any integer ranging from 5 to 20, b is any integer ranging from 1 to 5, M is a residue of small-molecule polyol, M1 is a residue of diisocyanate and does not contain an -NCO group, A1 is a residue of soft-segment polyol, A2 is a residue of hydrophilic group-containing polyol, and A3 is a residue of long-chain fatty alcohol. The preparation method includes the steps of mixing the diisocyanate with diethanolamine under the protection of an inert gas for reaction to obtain a branched prepolymer I; adding the small-molecule polyol for reaction to obtain a prepolymer II; mixing the diisocyanate with the soft-segment dihydric alcohol, the hydrophilic group-containing polyol and the monofunctional long-chain fatty alcohol for reaction to obtain a prepolymer III; subjecting the prepolymer II and the prepolymer III to reaction, adjusting the pH value, and performing emulsification to obtain the hyperbranched polyurethane water-repellent finishing agent. The hyperbranched polyurethane water-repellent finishing agent has the advantages that fabric can have a water-repelling function and is safe and environmentally friendly.

Description

technical field [0001] The invention relates to a hyperbranched polyurethane water-repellent finishing agent and a preparation method and application thereof, belonging to the technical field of textile chemicals. Background technique [0002] Hyperbranched polymers have attracted more and more attention from the scientific and industrial circles due to their novel structures, unique properties and potential applications. Compared with linear polymers, the special branched structure endows it with low viscosity, high solubility, non-crystalline, active reaction characteristics and rich isomerization; compared with dendritic polymers, it does not require special regularity and Perfect branched structure, so there is no need for purification and separation after each step of synthesis to continue the next step of reaction, so hyperbranched polymers can be synthesized in one step, which is simple and convenient. [0003] Water-based polyurethane is a green and environmentally ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/564C08G18/61C08G18/32D06M101/06D06M101/32D06M101/34
CPCC08G18/3206C08G18/61D06M15/564D06M2101/06D06M2101/32D06M2101/34D06M2200/12
Inventor 程博荣启龙邓燕李翔高殿权
Owner BEIJING CTA TEX CHEM
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