Hybrid polyurethane-polyacrylate dispersion containing fluorine and/or siloxane and its preparation method

A technology of polyacrylate and dispersion, applied in the direction of coating, etc., can solve the problems of not being able to provide waterproof and antifouling properties, and achieve the effect of excellent antifouling performance, good application prospects, and low surface energy

Inactive Publication Date: 2012-02-22
大连振邦氟涂料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the latex particles obtained by these methods have certain improvements in water resistance and solvent resistance, due to the defects in their structure and preparation process, the hydrophilic polyurethane components in the latex particles are mainly distributed on the surface, while the fluorine-containing components Most of them are wrapped in latex particles, so they can't provide enough waterproof and antifouling performance

Method used

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  • Hybrid polyurethane-polyacrylate dispersion containing fluorine and/or siloxane and its preparation method
  • Hybrid polyurethane-polyacrylate dispersion containing fluorine and/or siloxane and its preparation method
  • Hybrid polyurethane-polyacrylate dispersion containing fluorine and/or siloxane and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Press the raw material consumption specified in table 1, with 80.48 gram PTMG (Mw=1000), 48.23 gram IPDI, 5.00 gram DMPA, 9.05 gram HPMA, 1.03 gram BDO and 4.00 gram IPDA, 2.74 gram TEA and 0.08 gram DBTDL in nitrogen protection and Under the condition of maintaining mechanical stirring, the reaction was carried out at 68° C. for 6 hours. At the same time, 75 grams of acetone was added during the reaction. After the reaction, the temperature was lowered to 30-40° C., and then 2.74 g of triethylamine was added. The solution was dispersed into 200.00 grams of deionized water with vigorous stirring. The acetone was distilled off under reduced pressure and cooled to room temperature to obtain a double bond-containing polyurethane dispersion.

[0080] 85.00 g of FMA-1, 13.10 g of FMA-4 (perfluoroalkylethyl acrylate), 129.00 g of MMA, 60.0 g of BA, 20 g of LA, 6 g of MAA, and 0.50 g of NDM were mixed with 5.00 g of SDS, 7.50 g of 0- 9 and 7.50 grams of 0-10 were mixed with...

Embodiment 2-8

[0082] Examples 2-8 According to the amount of raw materials specified in Table 1, the same preparation method as in Example 1 was used to prepare the products respectively.

Embodiment 9

[0084] The obtained dispersion was coated on a glass substrate or a tin plate, dried at room temperature for 30 minutes, and then treated in an oven at 60° C. for 2 hours, and the obtained film thickness was about 10 μm. The contact angle and surface energy tests of the coating film were carried out on glass substrates, and the tests of other physical properties of the coating film were carried out on tinplate plates. The results are shown in Table 2.

[0085] Raw material consumption (g) in the different embodiments of table 1

[0086]

[0087]

[0088] Table 2 Coating Film Properties

[0089]

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Abstract

The invention provides a hybrid polyurethane-polyacrylate dispersion containing fluorine and / or siloxane and a preparation method thereof. The interpenetrating network structure and the core-shell structure exist in the dispersion particles at the same time. -30%), initiator (0.1-2.0%), emulsifier (0.5-5%), chain transfer agent (0.01-0.5%) and deionized water (50-70%) through emulsion polymerization. The dispersion is white milky liquid without organic solvent, solid content of 30-50%, molecular weight of 10000-100000, pH value of 7-9, viscosity of 30-300cp, stable period of more than 1 year. Coating films prepared from this dispersion have excellent physical properties and low surface energy, and can be used to provide surface coatings with excellent water / fouling properties.

Description

technical field [0001] The invention relates to a water-based polyurethane dispersion containing fluorine and / or siloxane and a preparation method thereof. The coating film prepared from the dispersion has excellent physical properties and low surface energy, and can be used to provide excellent waterproof / Surface coating with antifouling properties. Background technique [0002] Due to its excellent overall comprehensive properties, such as abrasion resistance, flexibility, environmental protection, low toxicity, etc., waterborne polyurethane dispersions are attracting more and more attention from the industry and are widely used. However, water-based polyurethane still needs to be improved in terms of weather resistance and water resistance. Among them, the hybrid polymerization of water-based polyurethane and polyacrylate is a more commonly used method. In order to further improve the water resistance and organic solvent resistance of aqueous polyurethane dispersions, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08F220/22C08G18/83C08G18/67C08G18/61C08G18/38C09D151/08
Inventor 任东文张祖文殷宪霞由继业王巧玲蔡玉波
Owner 大连振邦氟涂料股份有限公司
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