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Preparation method of waterborne polyurethane-polyacrylic ester composite emulsion

A water-based polyurethane and polyacrylate technology, applied in the field of polymer and/or material synthesis, can solve problems such as insufficient water solubility, inability to form films, affecting ink adhesion and wet rub resistance, etc.

Active Publication Date: 2012-05-02
佛山市顺德区乐从镇盛昌油墨有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to propose a kind of preparation method of water-based polyurethane-polyacrylate composite latex, and the present invention aims to solve the problem that the existing water-based ink emulsion is not good enough in water solubility; on the other hand, many emulsions are added Surfactant emulsified, the stability period of the emulsion is only about half a year, and the external surfactant cannot form a film, which affects the ink adhesion and wet rub resistance

Method used

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  • Preparation method of waterborne polyurethane-polyacrylic ester composite emulsion
  • Preparation method of waterborne polyurethane-polyacrylic ester composite emulsion
  • Preparation method of waterborne polyurethane-polyacrylic ester composite emulsion

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Example 1: The typical synthesis of vinyl-terminated waterborne polyurethane (VLWPU) was carried out in a 250 mL four-neck flask equipped with a thermometer, a mechanical stirrer and a condenser tube (with a drying tube connected to the top).

[0058] first at room temperature PPG 1000 (9.05 g), DMPA (0.68 g) and 1,4- BD (0.35 g) was added to the flask. then join NMP (1.8 g) was stirred until a homogeneous system was obtained. Raise the temperature to 60-90°C, then add dropwise within 30-60 min IPDI (4.65 g), DBTDL (3-5 drops) and acetone (5.0 g) mixed solution, continue to react for 3-5 h, to obtain isocyanate-terminated polyurethane prepolymer ( NCO-PU ). add to it HEMA (0.81 g), maintain the reaction at 60-80°C and continue the reaction for 1.5-2.5 h to obtain vinyl-terminated polyurethane ( VLPU ). Then cool down to 30-50°C, use TEA (0.56 g) neutralized VLPU , the reaction was completed within 15-30 min. Finally, slowly add distilled water (5...

Embodiment 2

[0060] Example 2 : put at room temperature PPG 1000 (10.07 g), DMPA (0.45 g) and 1,4- BD (0.33 g) was added to the flask. then join NMP (1.8g) was stirred until a homogeneous system was obtained. At this time, raise the temperature to 60-90°C, and then add it dropwise within 30-60 minutes IPDI (4.5 g), DBTDL (3-5 drops) and acetone (5.0 g), the reaction was carried out under the condition of stirring in an oil bath for 3-5 h to obtain an isocyanate-terminated polyurethane prepolymer ( NCO-PU ). At this time, join HEMA (0.65 g), and the reaction was continued at 60-80°C for 1.5-2.5 h to obtain vinyl-terminated polyurethane ( VLPU ). Secondly, at 30-50 °C, use TEA (0.42 g) neutralized VLPU , the reaction was completed within 15-30 min. Finally, distilled water (50 g) was slowly added to the neutralized polyurethane, and dispersed at room temperature for 30–60 min at high speed to obtain vinyl-terminated waterborne polyurethane with a carboxyl content of ...

Embodiment 3

[0061] Example 3 : at room temperature PPG 1000 (9g), DMPA (0.55 g) and 1,4- BD (0.28g) was added to the flask. then join NMP (1.8g) was stirred until a homogeneous system was obtained. At this time, raise the temperature to 60-90°C, and then add it dropwise within 30-60 minutes IPDI (4.52 g), DBTDL (3-5 drops) and acetone (5.0 g), the reaction was carried out under the condition of stirring in an oil bath for 3-5 h to obtain an isocyanate-terminated polyurethane prepolymer ( NCO-PU ). At this time, join HEMA (0.7 g), and the reaction was continued at 60-80 °C for 1.5-2.5 h to obtain vinyl-terminated polyurethane ( VLPU ). Secondly, at 30-50°C, use TEA (0.48 g) neutralized VLPU , the reaction was completed within 15-30 min. Finally, slowly add distilled water (50 g) to the neutralized polyurethane, and disperse at a high speed for 30-60 min at room temperature to obtain a vinyl-terminated waterborne polyurethane with a carboxyl group content of 4% ( ...

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Abstract

The invention provides a preparation method of a waterborne polyurethane-polyacrylic ester composite emulsion. The preparation method comprises the following steps of: firstly, synthesizing ethenyl-terminated waterborne polyurethane as an emulsifying agent and a seed phase for polymerizing ethylene emulsions; and secondly, introducing a polyacrylic este molecular chain to a molecule of the waterborne polyurethane by an emulsion polymerization reaction through a chemical bond to obtain the waterborne polyurethane-polyacrylic ester composite emulsion with a core-shell structure. The method has the advantages of wide range for alternative polyacrylic ester monomers, low prices, simple synthetic reaction and easiness in preparation of a composite structure with two different polymeric chains.

Description

technical field [0001] The invention proposes a preparation method of water-based polyurethane-polyacrylate composite latex, which is formed by chemical compounding of water-based polyurethane and water-based polyacrylate, and relates to the technical field of polymer and / or material synthesis. technical background [0002] Due to the needs of environmental protection, sustainable development and human health, waterborne polyurethane has been widely used in coatings and paints and other fields. Waterborne polyurethane can exhibit excellent elasticity, friction resistance and low temperature resistance after film formation, but its water resistance and chemical resistance are poor. In order to improve the water resistance and chemical resistance of waterborne polyurethanes, it is common practice to mix them with polyacrylates, because polyacrylates have excellent weather resistance, water resistance and chemical resistance, and the price of polyacrylates is relatively cheape...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08G18/67C08G18/48
Inventor 熊远钦梁鉴锋熊竹郭锐强徐伟箭
Owner 佛山市顺德区乐从镇盛昌油墨有限公司
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