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Method for synthesizing isocyanate component of waterborne two-component polyurethane paint through anion method

A two-component polyurethane and isocyanate component technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of unsuitability for industrialization, poor storage stability, and poor hydrophilicity, and achieve good stability, moderate viscosity, and good Hydrophilic effect

Inactive Publication Date: 2015-12-02
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems that the isocyanate component of the current water-based two-component polyurethane coating has poor hydrophilicity, is not easy to emulsify, has poor storage stability, and is not suitable for industrialization, and provides an anion method to synthesize water-based two-component polyurethane coatings. Component method for isocyanate components of polyurethane coatings

Method used

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  • Method for synthesizing isocyanate component of waterborne two-component polyurethane paint through anion method
  • Method for synthesizing isocyanate component of waterborne two-component polyurethane paint through anion method
  • Method for synthesizing isocyanate component of waterborne two-component polyurethane paint through anion method

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specific Embodiment approach 1

[0022] Specific embodiment one: present embodiment is the method for the isocyanate component of a kind of anion synthesis water-based two-component polyurethane coating, is specifically carried out as follows:

[0023] 1. Weigh 3-5 parts of toluene-2,4-diisocyanate, 39-41 parts of acetone, 3.5-5 parts of polyethylene glycol monomethyl ether, 1-3 parts Acetone, 2.1-3 parts of polycarbonate diol, 1.1-2 parts of acetone, 0.3-1 part of dimethylolpropionic acid, 1.1-3 parts of N-methylpyrrolidone, 0.22 1 part to 1 part of triethylamine and 35 parts to 50 parts of water;

[0024] 2. Evenly mix 3.5 to 5 parts of polyethylene glycol monomethyl ether and 1 to 3 parts of acetone weighed in step 1 to obtain the mixed solution I;

[0025] Evenly mix 2.1-3 parts of polycarbonate diol and 1.1-2 parts of acetone weighed in step 1 to obtain mixed solution II;

[0026] Uniformly mix 0.3-1 part of dimethylolpropionic acid and 1.1-3 parts of N-methylpyrrolidone weighed in step 1 to obtain mix...

specific Embodiment approach 2

[0028] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the polyethylene glycol monomethyl ether described in Step 1 has a molecular weight of 550. Others are the same as the first embodiment.

specific Embodiment approach 3

[0029] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the molecular weight of the polycarbonate diol described in Step 1 is 1000. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a method for synthesizing an isocyanate component of waterborne two-component polyurethane paint through an anion method, and relates to a method for synthesizing the isocyanate component of the waterborne two-component polyurethane paint. The method aims to solve the technical problem that the isocyanate component of an existing waterborne two-component polyurethane paint is poor in hydrophilicity, not prone to emulsification, poor in storage stability and not suitable for industrialization. The method includes the steps that firstly, raw materials are weighed and obtained by weight; secondly the anion synthesis method is conducted. The method has the advantages that firstly, the synthesis process is safe, reliable, stable and capable of being used in actual production; secondly, the isocyanate component synthesized through the method is anionic and is good in hydrophilicity and easy to emulsify, the content of isocyanate groups is 3%-5%, dispersion is uniform, storage stability is good, viscosity is moderate, and the isocyanate component can be easily mixed with a hydroxyl component.

Description

technical field [0001] The invention relates to a method for synthesizing an isocyanate component of a waterborne two-component polyurethane coating. Background technique [0002] Polyurethane is a fast-growing multifunctional polymer composite material, which can be made into foam plastics, elastomers, coatings, adhesives and other product forms, and has a wide range of uses. Through the adjustment and transformation of raw materials and formulas, polyurethane resins can be used to design various polyurethane coatings for different purposes, which are widely used in automobiles, trains, airplanes, ships, machine tools, electronics, electrical appliances, bridges, wooden furniture and other fields. [0003] Due to the high degree of crosslinking of polyurethane molecules, the coating film formed by solvent-based polyurethane coatings has excellent corrosion resistance, acid and alkali resistance, solvent resistance, abrasion resistance and scratch resistance, and the coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/12C08G18/76C08G18/66C08G18/48C08G18/44C08G18/32
Inventor 姜宪凯张赛楠
Owner HEILONGJIANG UNIV