High-film-forming-property aqueous polyurethane resin as well as preparation method and use method of high-film-forming-property aqueous polyurethane resin

A water-based polyurethane, film-forming technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve scratch resistance, recoatability, appearance brightness and film-forming defects, transfer printing sustainable development obstacles, damage people Health and other issues, to achieve the effect of good peeling effect, excellent film formation, and improved efficiency

Inactive Publication Date: 2016-03-30
GUANGDONG BANGGU CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the production of transfer printing coatings mainly adopts the production system of solvent-based polyurethane. The use of a large amount of organic solvents not only pollutes the environment, but also seriously damages people's health, which has become an obstacle to the sustainable development of the transfer printing industry.
At the same time, although solvent-based polyurethane has excellent stability, good toughness, good fastness to the aluminum layer, and low price, it has defects in scratch resistance, recoatability, appearance brightness, and film-forming properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of a kind of high film-forming aqueous polyurethane resin that the present invention proposes, comprises the steps:

[0032] S1. In a dry reaction kettle equipped with a stirrer, a thermometer, and a reflux condenser, add 10 parts of polyester diol with a molecular weight of 1000 to 3000, and 2 parts of a polyester diol with a functionality of 2 to 4 and a number average molecular weight of 1000 to 3000. Polyester polyol crosslinking agent, 3 parts of dimethylol propionic acid, 3 parts of 1,4-butanediol, 16 parts of isophorone diisocyanate and 8 parts of N-methylpyrrolidone, in 0.04 parts of octanoic acid Under the action of tin, the temperature was raised to 80° C. to carry out polymerization reaction for 3 hours to obtain material a;

[0033] S2. When the content of isocyanate groups in material a reaches the theoretical value, add 2 parts of triethylamine to material a, maintain the temperature at 50° C., and keep it warm for 0.5 hours to obtai...

Embodiment 2

[0038] The preparation method of a kind of high film-forming aqueous polyurethane resin that the present invention proposes, comprises the steps:

[0039] S1. In a dry reaction kettle equipped with a stirrer, a thermometer, and a reflux condenser, add 15 parts of polyester diol with a molecular weight of 1000 to 3000, and 2 parts with a functionality of 2 to 4 and a number average molecular weight of 1000 to 3000. Polyester polyol crosslinking agent, 4 parts of dimethylol butyric acid, 2 parts of neopentyl glycol, 14 parts of isophorone diisocyanate and 10 parts of N-methylpyrrolidone, under the action of 0.04 parts of stannous octoate , the temperature was raised to 80°C for 3 hours of polymerization reaction to obtain material a;

[0040] S2. When the content of isocyanate groups in material a reaches the theoretical value, add 3 parts of triethylamine to material a, maintain the temperature at 50° C., and keep it warm for 0.5 hours to obtain material b;

[0041] S3. Add 49...

Embodiment 3

[0045] The preparation method of a kind of high film-forming aqueous polyurethane resin that the present invention proposes, comprises the steps:

[0046] S1. In a dry reactor equipped with a stirrer, a thermometer, and a reflux condenser, add 8 parts of polyester diol with a molecular weight of 1000 to 3000, and 4 parts of polyester diol with a functionality of 2 to 4 and a number average molecular weight of 1000 to 3000. Polyester polyol crosslinking agent, 3 parts of dimethylol butyric acid, 1 part of sulfamate chain extender A95, 2 parts of ethylene glycol, 18 parts of isophorone diisocyanate and 6 parts of N-methylol Base pyrrolidone, under the action of 0.06 parts of stannous octoate, the temperature was raised to 85 ° C for 3.5 hours of polymerization reaction to obtain material a;

[0047] S2. When the content of isocyanate groups in material a reaches the theoretical value, add 2.5 parts of triethylamine to material a, maintain the temperature at 50° C., and keep it w...

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PUM

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Abstract

The invention discloses high-film-forming-property aqueous polyurethane resin, which is prepared from the following ingredients in percentage by weight: 10 to 35 percent of isocyanate, 5 to 20 percent of polyester polyol, 1 to 5 percent of polyester polyol cross-linking agents, 0.5 to 10 percent of micromolecule chain extenders, 1 to 5 percent of hydrophilic chain-extending agents, 1 to 5 percent of neutralizers, 0 to 5 percent of amine chain extenders, 0.02 to 0.1 percent of organic catalysts, 5 to 15 percent of cosolvent and 50 to 70 percent of deionized water. The invention also discloses a preparation method of the high-film-forming-property aqueous polyurethane resin. The invention also discloses a use method of the high-film-forming-property aqueous polyurethane resin. The high-film-forming-property aqueous polyurethane resin, the preparation method and the use method have the advantages that the film forming property is excellent; the viscosity is low; the coating can be thicker; the transfer printing paint process can be improved; the cost is favorably reduced; the benefits are improved; in addition, green and environment-friendly effects are achieved; the production cost is low.

Description

technical field [0001] The invention relates to the technical field of paint films, in particular to a water-based polyurethane resin with high film-forming properties and a preparation method and application method thereof. Background technique [0002] At present, the production of transfer printing coatings mainly adopts the production system of solvent-based polyurethane. The use of a large amount of organic solvents not only pollutes the environment, but also seriously damages people's health, which has become an obstacle to the sustainable development of the transfer printing industry. At the same time, although solvent-based polyurethane has excellent stability, good toughness, good fastness to the aluminum layer, and low price, it has defects in scratch resistance, recoatability, appearance brightness, and film-forming properties. The film-forming property refers to the completeness of the film after the paint is coated on PET and other substrates, baked to form a fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/12C08G18/32C09D175/06C09D5/20C09D7/00
CPCC08G18/6659C08G18/12C08G18/4202C08G18/6633C08G18/664C09D5/20C09D7/20C09D175/06C08G18/3234
Inventor 蒋军吕兴军汪博火
Owner GUANGDONG BANGGU CHEM TECH
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