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UV-curing side-chain fluorine-containing water-based polyurethane paint and preparation method thereof

A water-based polyurethane and coating technology, applied in the field of coatings, can solve the problems of limiting the research of UV-cured water-based fluorine-containing polyurethane, cumbersome purification process, and high production cost, and achieve excellent surface hydrophobic and antifouling properties, high gloss, and good stability Effect

Active Publication Date: 2013-10-02
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

UV curing technology has the characteristics of fast curing, environmental protection and high efficiency, and has entered people's field of vision. The research on UV curing water-based fluorine-containing polyurethane has been favored by people. Chinese patent CN: 201210565342.9 discloses a trimerization method using The reaction between the body and the fluorine-containing alcohol to form an adduct to prepare UV light-curable water-based fluorine-containing polyurethane latex film and its preparation method; , but at present, the preparation cost of fluorine-containing bifunctional monomers is high, the purification process is cumbersome, and perfluoroalkyl glycols are rare in China, which limits the research on UV-curable waterborne fluorine-containing polyurethanes

Method used

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  • UV-curing side-chain fluorine-containing water-based polyurethane paint and preparation method thereof
  • UV-curing side-chain fluorine-containing water-based polyurethane paint and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The preparation method of UV curable side chain fluorine-containing waterborne polyurethane resin is as follows:

[0043] S1. In parts by weight, 10 parts of dodecafluoroheptyl acrylate, 20 parts of methyl methacrylate, 2.5 parts of 1-thioglycerol, 0.2 parts of azobisisobutyronitrile, and 67.3 parts of tetrahydrofuran were heated at 60°C under nitrogen Under the atmosphere, react for 24 hours by semi-titration solution polymerization method, and obtain fluorine-containing alkyl glycol by precipitation and purification with n-hexane or petroleum ether;

[0044] S2. In parts by weight, react 32 parts of isophorone diisocyanate, 36 parts of polypropylene glycol 1000, and 0.05 parts of dibutyltin laurate at 80-90°C for 2.5h, cool down to below 70°C, add 1.8 parts of 1 , 4-butanediol, 13.6 parts of fluorine-containing alkyl glycol described in S1, keep the temperature at 60-70°C, react for 2.5 hours, add 5.0 parts of 2,2-bis(hydroxymethyl)propionic acid to continue the react...

Embodiment 2

[0047] The preparation method of UV curable side chain fluorine-containing waterborne polyurethane resin is as follows:

[0048] S1. In parts by weight, put 15 parts of decafluoroheptyl acrylate, 15 parts of methyl methacrylate, 2.5 parts of 1-thioglycerol, 0.2 parts of azobisisobutyronitrile, and 67.3 parts of tetrahydrofuran in a nitrogen atmosphere at 60 ° C. Under the condition of semi-titration solution polymerization reaction for 24h, the fluorine-containing alkyl glycol was prepared by precipitation and purification of n-hexane or petroleum ether;

[0049] S2. In parts by weight, react 25 parts of isophorone diisocyanate, 25 parts of polytetrahydrofuran ether glycol 1000, and 0.05 part of dibutyltin laurate at 80-90°C for 2.5h, cool down to below 70°C, and add 1.4 parts of 1,4-butanediol, 34 parts of fluorine-containing alkyl glycol described in S1, keep the temperature at 60-70°C, react for 2.5 hours, add 4.8 parts of 2,2-bis(hydroxymethyl) propane The acid continue...

Embodiment 3

[0052] The preparation method of UV curable side chain fluorine-containing waterborne polyurethane resin is as follows:

[0053] S1. In parts by weight, 25 parts of trifluorooctyl acrylate, 1.0 part of 1-thiodiol, 0.1 part of azobisisobutyronitrile, and 73.9 parts of tetrahydrofuran were half-titrated at 60°C under a nitrogen atmosphere. Polymerization reaction for 24 hours, and precipitation and purification of n-hexane or petroleum ether to obtain fluorine-containing alkyl glycol;

[0054] S2. In parts by weight, react 29.8 parts of isophorone diisocyanate, 26.8 parts of polypropylene glycol 1000, and 0.1 part of dibutyltin laurate at 80-90°C for 2.5 hours, cool down to below 70°C, and add 1.8 parts of 1 , 4-butanediol, 16.8 parts of fluorine-containing alkyl glycol described in S1, keep the temperature at 60-70°C, react for 2.5 hours, add 4.9 parts of 2,2-bis(hydroxymethyl)propionic acid to continue the reaction After 2.5 hours, add 16 parts of pentaerythritol triacrylate...

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Abstract

The invention relates to the technical field of paints, particularly to a UV-curing side-chain fluorine-containing water-based polyurethane paint and a preparation method thereof. The preparation method comprises the following steps: by using handy fluorine-containing acrylate monomer and / or fluorine-free acrylic monomer and chain transfer diol as raw materials, carrying out free-radical polymerization to obtain fluorine-containing alkyl diol; polymerizing side-chain fluorine-containing alkyl diol monomer to a water-based polyurethane hard section, and meanwhile, introducing photosensitive reactive group to the tail end of the polyurethane chain to prepare a UV-curing side-chain fluorine-containing water-based polyurethane resin; and blending with assistants to obtain the UV-curing water-based paint. The water-based paint provided by the invention has the characteristics of environmental protection and UV quick curing, has the advantages of excellent solvent property, excellent weatherability, high glossiness, excellent anti-staining property, excellent self-cleaning property and the like, can be used as a waterproof anticorrosive paint for building external walls, automobiles, ships and the like.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a UV-curable side chain fluorine-containing aqueous polyurethane coating and a preparation method thereof. Background technique [0002] In response to the requirements of environmental regulations, water-based coatings are developing rapidly. In advanced countries, the production of water-based coatings accounts for more than half of the total coatings. Polyurethane materials are widely used because of their excellent properties such as wear resistance, chemical corrosion resistance, high elasticity and strength. There are many varieties of polyurethane, and the theoretical research and production technology are mature. In the 1960s, there were a lot of research and reports on waterborne polyurethane, but there were some problems in the performance of waterborne polyurethane, such as the decline of water resistance and solvent resistance. Therefore, the theoretical research, pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/24C08F220/14C08F220/18C08F120/24C09D175/14C08G18/67C08G18/66C08G18/62
Inventor 张力刘金玲
Owner GUANGDONG UNIV OF TECH
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