Preparation method of composite emulsion of cation-nonionic waterborne polyurethane-polyacrylate

A technology of polyacrylate and waterborne polyurethane, which is applied in the field of cationic-nonionic waterborne polyurethane-polyacrylate composite emulsion, and can solve the problems of not being able to provide reliable preparation methods

Active Publication Date: 2013-09-25
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, there is still no reliable preparation method

Method used

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  • Preparation method of composite emulsion of cation-nonionic waterborne polyurethane-polyacrylate
  • Preparation method of composite emulsion of cation-nonionic waterborne polyurethane-polyacrylate
  • Preparation method of composite emulsion of cation-nonionic waterborne polyurethane-polyacrylate

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Embodiment 1～3

[0022] ①Preparation of polyacrylate containing terminal hydroxyl groups

[0023] The mixture of all monomers, chain transfer agents and initiators is evenly added dropwise into the solvent for free radical polymerization.

[0024] A) The formula is shown in Table 1.

[0025] Table 1

[0026]

[0027]

[0028] B) specific operation

[0029]According to the formula given in Table 1, a solvent is added to a four-necked flask equipped with a stirrer, a thermometer, a dry nitrogen conduit and a reflux condenser tube as a primer, and the ethylene containing cationic hydrophilic groups is added at 75 to 85 ° C. Base monomers, acrylate monomers containing non-ionic segments, acrylate monomers containing larger steric hindrance groups, other monomers containing vinyl structures, mercapto-containing diol chain transfer agents and initiators and stir the mixture evenly, and evenly drop it into the solvent in the four-necked flask within 3 hours, and keep it warm at 80°C for 5 ho...

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Abstract

The invention relates to a preparation method of composite emulsion of cation-nonionic waterborne polyurethane-polyacrylate. The method comprises the following steps of: in synthesis polyurethane reaction, accessing polyacrylate containing terminated hydroxyl into a polyurethane molecular chain through the contained terminated hydroxyl, and forming a side chain of a polyurethane molecule, so as to obtain the composite emulsion combined with a chemical bond, wherein the side chain of the polyacrylate containing the terminated hydroxyl includes a cationic hydrophilic group, a non-ionic segment and a large-resistance group; preparing the polyacrylate containing terminated hydroxyl by using a uniform dripping method in preparation, and then neutralizing and emulsifying to obtain the composite emulsion of cation-nonionic waterborne polyurethane-polyacrylate after reacting with common high-molecular polyol, isocyanate, a crosslinking agent and a common chain extender. The prepared composite emulsion integrates dual advantages of the polyurethane and polyacrylate materials, especially has excellent storage stability and electrolyte resistance, simultaneously has good water resistance and excellent mechanical property, and can be widely applied to the fields such as painting, ink, a binder and the like.

Description

technical field [0001] The invention relates to a method for preparing cationic-nonionic water-based polyurethane-polyacrylate composite emulsion. The emulsion is suitable for coatings, inks and adhesives and other fields. Background technique [0002] Due to its excellent performance and environmental protection characteristics, water-based polyurethane materials have been widely used in the fields of coatings, inks and adhesives. However, due to the high price of the raw material isocyanate used, its application is largely limited. Acrylic emulsion has good aging resistance, color and gloss retention, and low cost, which makes up for the shortcomings of polyurethane materials. Therefore, combining water-based polyurethane and water-based polyacrylate to prepare water-based polyurethane-polyacrylate composite emulsion can obtain cost-effective products. In recent years, waterborne polyurethane-polyacrylate composite emulsion (hereinafter referred to as PUA composite emuls...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/62C08F220/28C08F220/34C08F220/18C08F220/14C08F212/08C08F2/38
Inventor 许飞陈卫东胡中祝宝英张汗青庄振宇
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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