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A kind of method for synthesizing isocyanate component of water-based two-component polyurethane coating by anionic method

A two-component polyurethane and isocyanate component technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor storage stability, unsuitable for industrialization, and difficult emulsification, etc., and achieve good stability, good hydrophilicity, evenly dispersed effect

Inactive Publication Date: 2018-01-23
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of method for synthesizing isocyanate component of water-based two-component polyurethane coating by anionic method
  • A kind of method for synthesizing isocyanate component of water-based two-component polyurethane coating by anionic method
  • A kind of method for synthesizing isocyanate component of water-based two-component polyurethane coating by anionic 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 discloses a method for synthesizing isocyanate components of water-based two-component polyurethane coatings by anion method, and relates to a method for synthesizing isocyanate components of water-based two-component polyurethane coatings. 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. The present invention: 1. weighing raw materials according to parts by weight; 2. anion synthesis method. Advantages of the present invention: 1. The synthesis process of the present invention is safe, reliable and stable, and can be used in actual production; 2. The isocyanate component synthesized by the present invention is anionic, has good hydrophilicity, is easy to emulsify, and the content of isocyanate groups reaches 3% to 5%, uniform dispersion, good storage stability, moderate viscosity, easy to mix with hydroxyl components.

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 Patents(China)
IPC IPC(8): C09D175/04C08G18/76C08G18/66C08G18/48C08G18/44C08G18/32
Inventor 姜宪凯张赛楠
Owner HEILONGJIANG UNIV