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Continuous solvent-free aqueous polyurethane dispersion of sulfonate, and preparation method thereof

A water-based polyurethane dispersion technology, which is applied in the field of sulfonate water-based polyurethane dispersions, can solve the problems of small molecular weight solvents for water-based polyurethane dispersions, no urea-based structural reactions, and the inability to truly prepare water-based polyurethane dispersions, etc., to achieve production The effect of efficient process

Inactive Publication Date: 2018-04-13
SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned processes solve the defect of small molecular weight of water-based polyurethane dispersion and the simple recovery of solvent, but they do not involve how to react the urea group structure into polyurethane, and the dispersing and emulsifying process still cannot get rid of the dependence on solvent, so it cannot be really prepared Waterborne polyurethane dispersion that is environmentally friendly, high performance and high added value

Method used

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  • Continuous solvent-free aqueous polyurethane dispersion of sulfonate, and preparation method thereof
  • Continuous solvent-free aqueous polyurethane dispersion of sulfonate, and preparation method thereof
  • Continuous solvent-free aqueous polyurethane dispersion of sulfonate, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Formula: (mass percentage)

[0048]

[0049] Preparation:

[0050] (1) Mix polytetrahydrofuran diol (Mn=2000), dimethylolbutyric acid, and 2-methylol-1,3-propanediol to 80°C, add catalyst stannous octoate, and 4,4-diphenylmethane Diisocyanate (MDI) is heated up to 80°C, and the above two are injected through the gear metering pump and flow meter respectively, and the mixing head is injected at a speed of 250rpm, L / D=45, and the temperature is 120°C, 120°C, 130°C, and 140°C respectively. , Twin-screw reactors at 150°C, 170°C, and 215°C, with a residence time of 0.5min;

[0051] (2) Inject the melt gear pump into the shear pump at a temperature of 150°C and a speed of 1500rpm, and at the same time inject deionized water at a temperature of 150°C and a pressure of 0.5Mpa into the shear pump, and shear for 4 minutes;

[0052] (3) After being cooled to 30°C by a heat exchanger and decompressed to normal pressure, it is collected in a stainless steel storage tank, and st...

Embodiment 2

[0054] Formula: (mass percentage)

[0055]

[0056]

[0057] Preparation:

[0058] (1) Polyoxyethylene diol (Mn=500), polyadipate-1,4-butylene glycol ester diol (Mn=4000), dimethylol propionic acid, 1,4-butanediol Alcohol is mixed to 90°C, catalyst stannous octoate is added, toluene diisocyanate (TDI) is heated to 90°C, and the above two are respectively injected through the gear metering pump and flow meter through the mixing head at a speed of 250rpm, L / D=50, temperature Twin-screw reactors at 120°C, 120°C, 130°C, 140°C, 150°C, 170°C, and 215°C respectively, with a residence time of 2 minutes;

[0059] (2) Inject the melt gear pump into the shear pump with a temperature of 120°C and a speed of 1500rpm, and inject deionized water with a temperature of 120°C and a pressure of 0.2Mpa into the shear pump, and shear at a high speed for 5 minutes;

[0060] (3) Cool down to 50°C through a heat exchanger, reduce the pressure to normal pressure, and collect it in a stainless ...

Embodiment 3

[0062] Formula: (mass percentage)

[0063]

[0064] Preparation:

[0065] (1) Mix polyadipate-1,4-butylene glycol ester diol (Mn=1000), 1,4-dihydroxybutane-2-sodium sulfonate, and 1,4-butanediol to 100 ℃, add the catalyst dibutyltin dilaurate, hydrogenate 4,4-diphenylmethane diisocyanate (HMDI) and heat up to 100 ℃, the above two are injected through the mixing head through the gear metering pump and the flow meter respectively. The speed is 250rpm, L / D=30, twin-screw reactors with temperatures of 120°C, 120°C, 130°C, 140°C, 150°C, 170°C, and 215°C respectively, with a residence time of 1 min;

[0066] (2) Inject the melt gear pump into the shear pump with a temperature of 200°C and a speed of 1500rpm, and at the same time deionized water with a temperature of 200°C and a pressure of 1.5Mpa is also injected into the shear pump, and shear at a high speed for 3 minutes;

[0067] (3) The temperature was lowered to 30° C. by a heat exchanger, the pressure was lowered to norm...

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Abstract

The invention discloses a continuous solvent-free aqueous polyurethane dispersion of sulfonate, and a preparation method thereof. The preparation method comprises the following steps: (1) preheating polymer diol, diisocyanate, small-molecular diol, a low-melting point hydroxy-diterminated "Y"-type side chain hydrophilic chain extender and a catalyst, conveying the preheated materials into a twin-screw reactor, and carrying out a reaction to obtain a polyurethane melt, wherein the polymer diol is one or more of sulfonate-containing diol, polyether diol, polyester diol and polycarbonate diol; (2) injecting the polyurethane melt into a shear pump, injecting water or water containing a neutralizing agent into the shear pump, and carrying out shear dispersing; and (3) carrying out cooling and pressure reduction, adding a post-chain extender if needed, and carrying out a stirring reaction to obtain the solvent-free aqueous polyurethane dispersion. The disadvantage of harsh raw material requirements of existing twin-screw preparation technologies of the aqueous polyurethane dispersion and traditional acetone prepolymer aqueous technologies is overcome in the invention.

Description

technical field [0001] The present invention relates to the production method of sulfonate aqueous polyurethane dispersion. Background technique [0002] Water-based polyurethane dispersion uses water as the dispersion medium, and only water volatilizes into the atmosphere during use, which has no adverse effects on the environment. At the same time, using water as the dispersion medium makes the water-based polyurethane dispersion also have the characteristics of non-toxic, odorless, non-flammable, non-explosive and safe. Water-based polyurethane dispersion is widely used as a green and environmentally friendly polymer material, and it is also the general trend to replace oily polyurethane resin. At present, it has been widely used in various fields such as synthetic leather, adhesives, and architectural coatings. [0003] Waterborne polyurethane has developed rapidly since its industrialization in the late 1960s, but its production process is still a batch method and a se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/72C08G18/66C08G18/48C08G18/46C08G18/44C08G18/42C08G18/38C08G18/34C08G18/32C08G18/08
CPCC08G18/08C08G18/3206C08G18/348C08G18/3855C08G18/4018C08G18/4238C08G18/4277C08G18/44C08G18/4676C08G18/4825C08G18/4833C08G18/4854C08G18/664C08G18/6659C08G18/6674C08G18/6692C08G18/724C08G18/755C08G18/758C08G18/7614C08G18/7671
Inventor 盛兴丰崔燕军朱彦潘利军唐劲松
Owner SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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