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An acrylate modified polyurethane emulsion and a preparing method thereof

A technology of polyurethane emulsion and acrylate, which is applied in the direction of application, coating, ink, etc., can solve the problems of reducing the viscosity and stability of the system, and achieve the effects of improving water and moisture resistance, excellent effect, and increasing drying speed

Inactive Publication Date: 2017-07-04
中山市千佑化学材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In the above-mentioned technologies, epoxy modification also has the effect that when more epoxy is introduced, the prepolymer thickens significantly and the stability also decreases. However, acrylic acid-modified waterborne polyurethane is widely used due to its simple synthesis process, but a solvent is also needed to reduce the viscosity of the system during synthesis. Viscosity is contrary to the original intention of environmental protection

Method used

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  • An acrylate modified polyurethane emulsion and a preparing method thereof
  • An acrylate modified polyurethane emulsion and a preparing method thereof
  • An acrylate modified polyurethane emulsion and a preparing method thereof

Examples

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Embodiment 1

[0037] The preparation method of a kind of acrylate-modified polyurethane emulsion of the present embodiment comprises the steps:

[0038] 1) Mix 7 parts of isophorone diisocyanate, 1 part of DMPA (2,2-dimethylolpropionic acid), 0.5 parts of γ-(2,3-epoxypropoxy)propyltrimethoxysilane (KH560 ), 15 parts of 1000 molecular weight polyester diols were placed in a four-necked flask equipped with a mechanical stirrer, dropping funnel and reflux condenser, stirred for 1 hour, and DMPA was fully dispersed evenly;

[0039] 2) Add 0.02 parts of stannous octoate at 50°C (adding in three times, with an interval of 0.5h between each time) and keep the temperature not exceeding 55°C, raise the temperature to 80°C, stir for 6 hours, and rotate at a speed of 400-600rpm;

[0040] 3) Cool down to 75°C, add HEMA (hydroxyethyl methacrylate), stir and react at 75°C for 2 hours;

[0041] 4) Cool down to 60°C, add MMA (methyl methacrylate), BA (butyl acrylate), MA (methyl acrylate), and stir for 0....

Embodiment 2

[0047] The preparation method of a kind of acrylate-modified polyurethane emulsion of the present embodiment comprises the following steps:

[0048]1) Mix 7 parts of isophorone diisocyanate, 1 part of DMPA, 0.5 parts of γ-(2,3-epoxypropoxy)propyltrimethoxysilane (KH560), 15 parts of 1000 molecular weight polycarbonate diol Place in a four-neck flask equipped with a mechanical stirrer, dropping funnel and reflux condenser, and stir for 1 hour to fully disperse DMPA evenly;

[0049] 2) Add 0.02 parts of stannous octoate at 50°C (adding in three times, with an interval of 0.5h between each time) and keep the temperature not exceeding 55°C, raise the temperature to 80°C, stir for 6 hours, and rotate at a speed of 400-600rpm;

[0050] 3) Cool down to 75°C, add HEMA, stir and react at 75°C for 2 hours;

[0051] 4) Cool down to 60°C, add MMA, BA, MA, and stir for 0.5 hours to fully mix the acrylate monomer and polyurethane prepolymer;

[0052] 5) Lower the temperature to 40-50°C, a...

Embodiment 3

[0057] The preparation method of a kind of acrylate-modified polyurethane emulsion of the present embodiment comprises the following steps:

[0058] 1) Mix 7 parts of isophorone diisocyanate, 1 part of DMPA, 0.5 parts of γ-(2,3-epoxypropoxy)propyltrimethoxysilane (KH560), 15 parts of 1000 molecular weight polycaprolactone binary Alcohol was placed in a four-neck flask equipped with a mechanical stirrer, dropping funnel and reflux condenser, and stirred for 1 hour to fully disperse DMPA evenly;

[0059] 2) Add 0.02 parts of stannous octoate at 50°C (adding in three times, with an interval of 0.5h between each time) and keep the temperature not exceeding 55°C, raise the temperature to 80°C, stir for 6 hours, and rotate at a speed of 400-600rpm;

[0060] 3) Cool down to 75°C, add HEMA, stir and react at 75°C for 2 hours;

[0061] 4) Cool down to 60°C, add MMA, BA, MA, and stir for 0.5 hours to fully mix the acrylate monomer and polyurethane prepolymer;

[0062] 5) Lower the tem...

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Abstract

The invention relates to an acrylate modified polyurethane emulsion and a preparing method thereof. The method includes steps of fully stirring and mixing a macromolecule polyol, diisocyanate, 2,2-bis(hydroxymethyl)propionic acid and a silane coupling agent, then adding a catalyst into the mixture, reacting the mixture to obtain a polyurethane prepolymer, then adding hydroxy acrylate into the polyurethane prepolymer, reacting the mixture to obtain a hydroxy acrylate end-capped polyurethane prepolymer, then adding an acrylate monomer into the hydroxy acrylate end-capped polyurethane prepolymer, stirring and reacting the mixture for 0.5-1 h, adding a neutralizer and a chain extender into the mixture to obtain a pre-emulsion, adding an aqueous K2S2O3 solution into the pre-emulsion, and reacting the mixture for 2-2.5 h to obtain the emulsion. The emulsion prepared by the method has good flexibility, drying performance, no repeated adhesion and good intermiscibility, and can be widely applied in waterborne printing ink and waterborne coating.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an acrylate-modified polyurethane emulsion and a preparation method thereof. Background technique [0002] Polyurethane is the abbreviation of polyurethane, which is mainly synthesized by stepwise polymerization of difunctional or polyfunctional isocyanate and compounds containing difunctional or polyfunctional active hydrogen. Polyurethane has many characteristics such as high strength, excellent tensile properties, high fullness and high gloss, and is widely used in coatings, printing, adhesives and other fields. By changing the types and proportions of isocyanates and compounds containing active hydrogen, products with various structures and functions can also be synthesized. [0003] Polyurethane usually needs to add a large amount of solvent to dilute and reduce viscosity, thereby improving its construction convenience. The solvent has the characteristics of bein...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/14C08F220/18C08G18/66C08G18/42C08G18/44C08G18/38C08G18/28C08G18/34C09D151/08C09D11/107
CPCC08F283/008C08G18/284C08G18/348C08G18/3893C08G18/42C08G18/4277C08G18/44C08G18/6659C09D11/107C09D151/08C08F220/1804
Inventor 苏敏超刘涛苏杰龙
Owner 中山市千佑化学材料有限公司
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