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Waterborne polyurethane dispersion with high performance and preparation method thereof

A water-based polyurethane and dispersion technology, applied in the field of new chemical materials, can solve the problems of solvent green recycling production efficiency, inability to achieve low modulus, high tensile strength, low molecular weight, etc., to reduce equipment requirements, improve production efficiency, The effect of increasing the molecular weight

Active Publication Date: 2013-11-06
SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The object of the present invention is to provide a kind of high-performance waterborne polyurethane dispersion and preparation method thereof, solve the low molecular weight, solvent green recovery and production efficiency in the waterborne polyurethane dispersion production process with the production technology of thermoplastic polyurethane elastomer (TPU) Low and other problems, especially to solve the low modulus and high tensile problems that cannot be realized due to the low molecular weight in the production process of conventional water-based polyurethane dispersions

Method used

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  • Waterborne polyurethane dispersion with high performance and preparation method thereof
  • Waterborne polyurethane dispersion with high performance and preparation method thereof
  • Waterborne polyurethane dispersion with high performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Example 1 (WT-1)

[0081] The A component PTMEG1000, B component MDI and C component BDO are heated to 100, 60, 80 ℃ respectively, and 40ppm of Dabco is added to the A component T-9, 0.2%wt Irganox1010, 0.2%wt Irgafos168, 0.4%wt Tinuvin 329, 0.4%wt Tinuvin 292; DMBA with 1.31 times the mass of BDO was added to the C component, and the above three components were fully melted and maintained after the The temperature is 80, 60, 60 ℃;

[0082] The three components A, B, and C are introduced into a 140-180 ℃, 200 rpm after the proportion of 57.7%wt, 33.4%wt, 8.9%wt is accurately measured by a metering pump and a flowmeter, and is instantly mixed by a high-speed mixing head. After the reaction type twin-screw extruder reacts for 2 minutes, the water-based polyurethane particles are obtained by underwater dicing and collection;

[0083] Put 2000Kg of the above-mentioned water-based polyurethane particles into a mixture containing 5000Kg of acetone / water (mass ratio 3:2), t...

Embodiment 2

[0084] Example 2 (WT-2)

[0085] Raise the temperature of A-component PPG 2000, B-component MDI and C-component BDO to 50, 60, and 100°C respectively, and add 50ppm of Dabco to A-component T-9, 0.2%wt Irganox1010, 0.2%wt Irgafos168, 0.4%wt Tinuvin 329, 0.4%wt Tinuvin 292; add DMBA 1.31 times the mass of BDO to component C, and keep the above three components fully melted and uniform Temperature at 50, 60, 80°C;

[0086] The three components of A, B and C are accurately metered by metering pump and flow meter at the ratio of 64.5%wt, 26.7%wt and 8.8%wt, and then mixed evenly by the high-speed mixing head, and then introduced into the 120-160℃, 300rpm The reactive twin-screw extruder reacted for 3 minutes and pelletized and collected under water to obtain water-based polyurethane particles;

[0087] Put 2000Kg of the above-mentioned water-based polyurethane particles into 7000Kg of acetone / water mixture (mass ratio 1:1.2), then add 67.8 Kg of TEA, raise the temperature to 70°...

Embodiment 3

[0088] Example 3 (WT-3)

[0089] Raise the temperature of A-component PBA 2000, B-component MDI and C-component BDO to 90, 60, and 100°C respectively, and add 20ppm of Dabco to A-component T-9, 0.2%wt Irganox1010, 0.2%wt Irgafos168, 0.4%wt Tinuvin 329, 0.4%wt Tinuvin 292; add DMBA 1.31 times the mass of BDO to component C, and keep the above three components fully melted and uniform Temperature at 50, 60, 80°C;

[0090] The three components of A, B and C are accurately metered by metering pump and flow meter at the ratio of 64.5%wt, 26.7%wt and 8.8%wt, and then mixed evenly by the high-speed mixing head, and then introduced into the 160-220℃, 200rpm The reactive twin-screw extruder reacted for 1 minute, and then pelletized and collected under water to obtain water-based polyurethane particles;

[0091] Put 2000Kg of the above-mentioned water-based polyurethane particles into 7000Kg of acetone / water mixture (mass ratio 1:1), then add 67.8 Kg of TEA, raise the temperature to ...

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Abstract

The invention discloses a waterborne polyurethane dispersion with high performance and a preparation method thereof. The preparation method comprises the following steps: (1) solvent-free synthesis of a waterborne polyurethane particle: a step of preparing a waterborne polyurethane melt from a molten waterborne polyurethane synthesis raw material by using a solvent-free continuous twin-screw production process for TPU and then preparing the waterborne polyurethane particle from the waterborne polyurethane melt; and (2) nonreactive emulsification of the waterborne polyurethane particle: a step of dispersing and emulsifying the waterborne polyurethane particle in a mixed solvent containing ketone and water and then extracting a ketone solvent to prepare the waterborne polyurethane dispersion with solid content of 0 to 60 wt%. According to the invention, a continuous production process is adopted for the waterborne polyurethane dispersion with high performance; the prepared waterborne polyurethane dispersion has higher molecular weight, low modulus and high tensile performance; a solvent produced in the preparation process can be recycled without purification; and the preparation method has the advantages of stable process operation, low requirements for emulsification equipment, high production efficiency and wide application prospects.

Description

technical field [0001] The invention belongs to the field of new chemical materials, in particular to a high-performance aqueous polyurethane dispersion and a continuous production process thereof. Background technique [0002] Polyurethane (PU) refers to the abbreviation of high polymer polyurethane (Polyurethane) containing a large number of urethane groups (-NHCOO-) on the main chain. Because of its excellent physical and chemical properties, it has been widely used. It is widely used in synthetic leather and artificial leather industry. It is a multifunctional polymer material and has become an indispensable polymer material in social and economic development. [0003] Polyurethane resins for synthetic leather are divided into oil-based polyurethane resins and water-based polyurethane resins. Oil-based polyurethane resins are obtained by dissolving high-polymer polyurethane in organic solvents such as dimethylamide (DMF), ketones, and toluene. Polyurethane resin is prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/02C08G18/66C08G18/48C08G18/42C08L75/06C08L75/08
Inventor 孙水升朱彦唐劲松黄德龙蒋红梅陈小金胡海波
Owner SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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