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Waterborne polyurethane-acrylate hybrid resin and preparation method thereof, and application in leather finishing agent

A technology of water-based polyurethane and acrylate, applied in the direction of coating, etc., can solve the problems of poor anti-adhesive performance of paint film surface, poor filler coating performance and unusability

Active Publication Date: 2020-06-02
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anti-adhesive performance of the paint film surface and the coating performance of fillers are poor
In the downstream leather production process, the surface-coated leather products will inevitably produce "face-to-face" stacking and extrusion of leather, so the coating film must have excellent anti-adhesive properties, otherwise it will be unusable due to the problem of product adhesion

Method used

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  • Waterborne polyurethane-acrylate hybrid resin and preparation method thereof, and application in leather finishing agent
  • Waterborne polyurethane-acrylate hybrid resin and preparation method thereof, and application in leather finishing agent
  • Waterborne polyurethane-acrylate hybrid resin and preparation method thereof, and application in leather finishing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Add 68g HMDI (dicyclohexylmethane diisocyanate), 110g PNA2000 (polyneopentyl adipate diol), heat up to 80°C for 1 hour, then cool down to about 60°C and add 3.8g trimethylolpropane, 12.6g Dimethylol propionic acid, 48g of acetone, heated up to 75°C for reaction, sampling and measuring NCO every 1 hour, until the NCO reached below 2%, stop the reaction.

[0110] Cool down to below 60°C (between 50-60°C), add 76g of acetone, 32g of butyl acrylate, 104.5g of methyl methacrylate, 39g of styrene, and 19.5g of perfluoroalkyl ethyl acrylate, mix and dissolve.

[0111] Cool down to below 40°C and add 9.5g of triethylamine, and neutralize for 3 minutes.

[0112] The prepared prepolymer was poured into a dispersion cup, and 585 g of water was added under a high-speed shear condition of 1500 r / min to obtain a water-based polyurethane-acrylate mixed emulsion.

[0113] Transfer the emulsion to a four-necked flask equipped with a reflux condenser, a thermometer and a mechanical st...

Embodiment 2

[0116] Add 68g HMDI (dicyclohexylmethane diisocyanate), 110g PNA2000 (polyneopentyl adipate diol), heat up to 80°C for 1 hour, then cool down to about 60°C and add 3.8g trimethylolpropane, 12.6g Dimethylol propionic acid, 48g of acetone, heated up to 75°C for reaction, sampling and measuring NCO every 1 hour, until the NCO reached below 2%, stop the reaction.

[0117] Cool down to below 60°C (between 50-60°C), add 76g of acetone, 32g of butyl acrylate, 122g of methyl methacrylate, 39g of styrene, 2g of perfluoroalkyl ethyl acrylate, mix and dissolve.

[0118] Cool down to below 40°C and add 9.5g of triethylamine, and neutralize for 3 minutes.

[0119] The prepared prepolymer was poured into a dispersion cup, and 585 g of water was added under a high-speed shear condition of 1500 r / min to obtain a water-based polyurethane-acrylate mixed emulsion.

[0120] Transfer the emulsion to a four-necked flask equipped with a reflux condenser, a thermometer and a mechanical stirrer, ra...

Embodiment 3

[0123] Add 68g HMDI (dicyclohexylmethane diisocyanate), 110g PNA2000 (polyneopentyl adipate diol), heat up to 80°C and react for 1h, then cool down to about 60°C and add 3.8g trimethylolpropane, 12.6g Dimethylol propionic acid, 48g of acetone, heated up to 75°C for reaction, sampling and measuring NCO every 1 hour, until the NCO reached below 2%, stop the reaction.

[0124] Cool down to below 60°C (between 50-60°C), add 76g of acetone, 32g of butyl acrylate, 88g of methyl methacrylate, 39g of styrene, and 36g of perfluoroalkyl ethyl acrylate, mix and dissolve.

[0125] Cool down to below 40°C and add 9.5g of triethylamine, and neutralize for 3 minutes.

[0126]The prepared prepolymer was poured into a dispersion cup, and 585 g of water was added under a high-speed shear condition of 1500 r / min to obtain a water-based polyurethane-acrylate mixed emulsion.

[0127] Transfer the emulsion to a four-necked flask equipped with a reflux condenser, a thermometer and a mechanical st...

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Abstract

The invention provides a waterborne polyurethane-acrylate hybrid resin and a preparation method thereof, and application in a leather finishing agent. The preparation method comprises the following steps: mixing and dissolving a diluted monomer and an isocyanate-terminated prepolymer, carrying out a neutralization reaction, carrying out high-speed shearing dispersion to obtain a pre-hybridized emulsion, and adding an initiator into the pre-hybridized emulsion to initiate polymerization, wherein the isocyanate-terminated prepolymer is obtained by mixing and reacting diisocyanate, macromolecularpolyol and a chain extender, and the macromolecular polyol comprises at least one of polyether diol and polyester diol. The waterborne polyurethane-acrylate hybrid resin prepared by the preparation method disclosed by the invention has the advantages that the preparation process is simple and controllable, and the leather finishing agent prepared from the waterborne polyurethane-acrylate hybrid resin is suitable for the field of high-end leather finishing agents, and has the advantages of high weather resistance, smooth hand feeling, good anti-sticking performance, good anti-whitening performance, good filler coating performance, high blackness and good scratch resistance.

Description

technical field [0001] The invention relates to the field of water-based leather finishing agents, in particular to a water-based polyurethane-acrylate hybrid resin which can be used in leather finishing agents, a preparation method thereof and an application in leather finishing agents. Background technique [0002] Surface finishing is one of the most important processes in the tanning process. In order to make the appearance and feel of artificial leather closer to real leather, the surface is usually treated with surface finishing treatments such as adding luster, matting and improving the feel to obtain a soft luster and similar The feel of natural leather, and after the leather is surface-coated, it will also be endowed with necessary properties such as scratch resistance, abrasion resistance, alcohol resistance, bending resistance, high temperature yellowing resistance, and ultraviolet light resistance. [0003] In the prior art, water-based polyurethane resin has bee...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/14C08G18/75C08G18/66C08G18/42C08G18/34C08G18/32C09D151/08
CPCC08F283/006C08G18/758C08G18/4238C08G18/348C08G18/3206C09D151/08C08F220/14
Inventor 李英卓胡海东邓俊英张洁
Owner WANHUA CHEM GRP CO LTD
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