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UV (ultraviolet) photocured water-based fluorine-containing polyurethane latex film and preparation method thereof

A technology of polyurethane emulsion and latex film, used in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor alcohol resistance, low double bond content, poor water resistance, etc., and achieve good acid resistance, improved mechanical properties, and mechanical properties. strong effect

Inactive Publication Date: 2015-02-11
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, most of the current water-based UV-curable polyurethanes are polyurethane water emulsions synthesized by the reaction of ordinary polyether and TDI. ), poor alcohol resistance (no wrinkling or falling off for 8 hours); at the same time, due to the existence of a large number of hydrophilic groups, poor water resistance (no foaming for 72 hours), it is difficult to meet the requirements of high-performance coatings, which limits its further application

Method used

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  • UV (ultraviolet) photocured water-based fluorine-containing polyurethane latex film and preparation method thereof
  • UV (ultraviolet) photocured water-based fluorine-containing polyurethane latex film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0055] A UV light-curable water-based fluorine-containing polyurethane latex film, that is, adding 3.73% of photoinitiator IRGACURE 184 to the UV-curable water-based fluorine-containing polyurethane emulsion by weight percentage and stirring evenly, and coating on a tetrafluoroethylene board , dried at 60°C to constant weight, and then cured by UV radiation on a UV curing machine to obtain a UV curable water-based fluorine-containing polyurethane latex film with a thickness of 0.35mm;

[0056] Described UV curable water-based fluorine-containing polyurethane emulsion, calculated in parts by weight, its raw material composition and content are as follows:

[0057] Polycarbonate diol 40 parts

[0058] Isophorone diisocyanate trimer-fluoroalcohol adduct 100 parts

[0059] Chain extender 4 parts

[0060] 20 parts of hydroxyethyl acrylate

[0061] Pentaerythritol triacrylate 20 parts

[0062] Neutralizer 4 parts

[0063] Catalyst 0.02 part

[0064] Thinner 20 parts

[0065] ...

Embodiment 2

[0097] A UV light-curable water-based fluorine-containing polyurethane latex film, that is, adding 4% of the photoinitiator IRGACURE 907 to the UV-curable water-based fluorine-containing polyurethane emulsion by weight percentage and stirring evenly, and then coating it on a tetrafluoroethylene board , dried at 60° C. to constant weight, and then cured by UV radiation on a UV curing machine to obtain a UV curable water-based fluorine-containing polyurethane latex film with a thickness of 0.05 mm.

[0098] A kind of UV curing water-based fluorine-containing polyurethane emulsion used above, calculated in parts by weight, its raw material composition and content are as follows:

[0099] Polycarbonate diol 80 parts

[0100] Isophorone diisocyanate trimer-fluoroalcohol adduct 120 parts

[0101] Chain extender 8 parts

[0102] 40 parts of hydroxyethyl acrylate

[0103] Pentaerythritol triacrylate 40 parts

[0104] Neutralizer 6 parts

[0105] Catalyst 1.0 parts

[0106] Thinner...

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Abstract

The invention discloses a UV (ultraviolet) photocured water-based fluorine-containing polyurethane latex film and a preparation method thereof. The UV photocured water-based fluorine-containing polyurethane latex film is prepared by the following specific steps: adding photoinitiator IRGACURE184 or IRGACURE907 into a UV-cured water-based fluorine-containing polyurethane emulsion, evenly stirring, coating on a tetrafluoroethylene board, and drying at 60 DEG C to a constant weight, wherein the photoinitiator IRGACURE184 or IRGACURE907 accounts for 3.73-4% of the UV-cured water-based fluorine-containing polyurethane emulsion in percentage by weight; and then, performing UV irradiation curing on a UV curing machine to obtain the UV photocured water-based fluorine-containing polyurethane latex film. The preparation method comprises the preparation of an isophorone diisocyanate tripolymer-fluorine alcohol addition compound, the preparation of the UV-cured water-based fluorine-containing polyurethane emulsion and the preparation of the UV photocured water-based fluorine-containing polyurethane latex film. The finally obtained UV photocured water-based fluorine-containing polyurethane latex film transparent, can not be yellowed, and has favorable acid resistance, alkali resistance, water resistance and high hardness.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a UV light-cured water-based fluorine-containing polyurethane latex film and a preparation method thereof. Background technique [0002] Water-based ultraviolet (UV) curing polyurethane inherits and develops many advantages of traditional UV curing technology and water-based polyurethane technology. Rapid development. At the same time, it also overcomes the contradiction between the high hardness and high flexibility of the light-cured film, especially effectively solves the contradiction between the viscosity of the system and the relative molecular weight of the resin, so the relative molecular weight of the resin can be large enough, and it is easy to obtain the no-nonsense properties before photocuring. Viscous dry film brings great convenience to coating construction. [0003] However, most of the current water-based UV-curable polyurethanes are polyu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C08G18/79C08G18/67C08G18/66C08G18/44
Inventor 张英强李烨吴蓁沈冰莹施雯刘悦婷姜钰芸
Owner SHANGHAI INST OF TECH
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