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Preparation method and application of hyperbranched polyurethane/acrylate core-shell emulsion

A technology of hyperbranched polyurethane and acrylate, applied in the field of coatings, can solve problems such as environmental and human health hazards

Inactive Publication Date: 2019-04-05
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the technical problems of incompatibility between acrylate and polyurethane in the process of polyurethane / acrylate blending modification, and the use of a large amount of organic solvents in the preparation process of traditional solvent-based polyurethane, which causes great harm to the environment and human health

Method used

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  • Preparation method and application of hyperbranched polyurethane/acrylate core-shell emulsion
  • Preparation method and application of hyperbranched polyurethane/acrylate core-shell emulsion

Examples

Experimental program
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Embodiment 1

[0030] Example 1: The specific preparation process of hydroxyl-terminated hyperbranched polyurethane crosslinking agent (HBPU-1): Weigh 50 parts of isophorone diisocyanate (IPDI), 5 parts of dimethylol propionic acid (DMPA) and an appropriate amount of solvent , after stirring evenly, inject nitrogen gas, remove the air in the system, raise the temperature to 80°C for 1 hour, then cool down to 0°C, dissolve 16 parts of diethanolamine (DEOA) in a small amount of solvent, and slowly add it dropwise through a peristaltic pump. After completion, the temperature was raised to 80°C for 4 hours to obtain a hyperbranched polyurethane crosslinking agent (HBPU-1).

Embodiment 2

[0031] Example 2: The specific preparation process of the hydroxyl-terminated hyperbranched polyurethane crosslinking agent (HBPU-2): Weigh 50 parts of IPDI, 5 parts of DMPA and an appropriate amount of solvent, stir evenly and feed nitrogen to remove the air in the system and heat up to React at 80°C for 1 hour, then lower the temperature to 0°C, dissolve 20 parts of DEOA in a small amount of solvent, and slowly add it dropwise through a peristaltic pump. ).

Embodiment 3

[0032] Example 3: The specific preparation process of the hydroxyl-terminated hyperbranched polyurethane crosslinking agent (HBPU-3): Weigh 50 parts of IPDI, 5 parts of DMPA and an appropriate amount of solvent, stir evenly, and then feed nitrogen, remove the air in the system, and heat up to React at 80°C for 1 hour, then lower the temperature to 0°C, dissolve 24 parts of DEOA in a small amount of solvent, and slowly add it dropwise through a peristaltic pump. ).

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Abstract

The invention discloses a preparation method of hyperbranched polyurethane / acrylate core-shell emulsion. The preparation method comprises the following steps: reacting organic isocyanate, a chain extender and secondary amines of two hydroxys to form a hyperbranched polyurethane crosslinking agent; and then preparing polyurethaneprepolymer by a traditional method, adding a pre-synthesized crosslinking agent to synthesize hyperbranched polyurethane, adding a salt forming agent and water to form waterborne hyperbranched polyurethane emulsion, and finally adding mixed emulsion of acrylate monomers, an initiator, a crosslinking agent, an emulsion agent and water to synthesize composite microsphere particles which take hyperbranched polyurethane as shells and take the acrylate as cores. The cured material simultaneously has excellent properties of the hyperbranched polyurethane material and the acrylate material, and has wide application prospect in the field of damping coatings.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a preparation method of a core-shell structure composite emulsion with polyurethane as the shell and acrylate as the core. Background technique [0002] Waterborne polyurethane is a high polymer containing repeated carbamate units in the main chain. The structure is divided into hard segments and soft segments. The hard segments contain polar groups such as urea bonds and carbamates, making them highly The cohesive energy is shown to have good wear resistance and rigidity. The methylene group and ester group in the soft segment make it flexible and elastic. In addition, water-based polyurethane uses water as the dispersion medium and has good environmental performance, so it is widely used in coatings, inks and other fields. [0003] However, water-based polyurethane also has certain defects, such as its water resistance, solvent resistance and mechanical propertie...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/18C08F220/14C08F212/36C08F2/26C08G18/32C08G18/34C08G18/48C08G18/67C08G18/75C08G18/66
CPCC08F2/26C08F283/008C08G18/0823C08G18/3206C08G18/3275C08G18/348C08G18/4854C08G18/672C08G18/755C08G18/6692C08F220/1804
Inventor 张会轩张求学邓云娇
Owner CHANGCHUN UNIV OF TECH