Organic silicon/organic fluorine dual-modified polyurethane composite UV photocureable coating as well as preparation and application thereof

A light-curing coating, dual modification technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of reduced coating properties, difficult migration of fluorine-containing groups, poor compatibility, etc.

Active Publication Date: 2020-10-09
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the way of physical blending, the compatibility between organic fluoropolymer and epoxy coating is poor, phase separation occurs, the material becomes opaque, and the bulk performance of the coating is also reduced; while adding small molecule fluorine-containing reactiv

Method used

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  • Organic silicon/organic fluorine dual-modified polyurethane composite UV photocureable coating as well as preparation and application thereof
  • Organic silicon/organic fluorine dual-modified polyurethane composite UV photocureable coating as well as preparation and application thereof
  • Organic silicon/organic fluorine dual-modified polyurethane composite UV photocureable coating as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] (1) The preparation of the polyurethane that contains triple double bond alcohol ester termination: the butanone solvent of 160 mass parts, the polycaprolactone diol of 100 mass parts are added the reaction that reflux condenser, dropping funnel, thermometer and stirrer are housed , heat and stir to 60°C, then add 40 parts by mass of isophorone diisocyanate, 2.5 parts by mass of catalyst dibutyltin dilaurate and 0.5 parts by mass of inhibitor (hydroquinone), then heat up to 80°C, and react After 6 hours, a polyurethane prepolymer was obtained, and then 30 parts by mass of pentaerythritol triacrylate was added to the system, reacted for 5 hours, and the solvent was removed by rotary evaporation to obtain a polyurethane terminated with an alcohol ester containing a triple double bond. FT-IR (BrukerTENSOR27 (Germany) Fourier transform infrared spectrometer) at 1730cm -1 with 1635cm -1 There are C=O and C=C absorption peaks at 1 HNMR shows CH at 6.1ppm, 5.6ppm2 =C(CH 3 )...

Embodiment 2

[0086] (1) Preparation of polyurethane containing triple double bond alcohol ester end-blocking: 180 mass parts of toluene solvent, 100 mass parts of polycaprolactone diol are added in the reaction that reflux condenser, dropping funnel, thermometer and stirrer are housed , heated and stirred to 55°C, then added 45 parts by mass of isophorone diisocyanate, 2.6 parts by mass of catalyst dibutyltin dilaurate and 0.5 parts by mass of inhibitor (hydroquinone), then heated to 80°C, and reacted for 5 hours, to obtain a polyurethane prepolymer, and then add 30 parts by mass of pentaerythritol triacrylate to the system, react for 5 hours, and remove the solvent by rotary evaporation to obtain a polyurethane containing a triple bond alcohol ester terminated. FT-IR (BrukerTENSOR27 (Germany) Fourier transform infrared spectrometer) at 1730cm -1 with 1635cm -1 There are C=O and C=C absorption peaks at the 1 HNMR shows CH at 6.1ppm, 5.6ppm 2 =C(CH 3 )- proton absorption peak, indicatin...

Embodiment 3

[0094] (1) Preparation of polyurethane containing triple double bond alcohol ester end-capping: 140 mass parts of dioxane solvent, 100 mass parts of polycaprolactone diol are added In the reaction, heat and stir to 60°C, then add 30 parts by mass of isophorone diisocyanate, 2 parts by mass of catalyst dibutyltin dilaurate and 0.4 parts by mass of inhibitor (hydroquinone), then heat up to 80°C , reacted for 6 hours to obtain a polyurethane prepolymer, and then added 25 parts by mass of pentaerythritol triacrylate to the system, reacted for 4 hours, and removed the solvent by rotary evaporation to obtain a polyurethane terminated with an alcohol ester containing triple and double bonds. FT-IR (BrukerTENSOR27 (Germany) Fourier transform infrared spectrometer) at 1730cm -1 with 1635cm -1 There are C=O and C=C absorption peaks at the 1 HNMR shows CH at 6.1ppm, 5.6ppm 2 =C(CH 3 )- proton absorption peak, indicating that there is a double bond at the end of the product.

[0095]...

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Abstract

The invention discloses an organic silicon/organic fluorine dual-modified polyurethane composite UV photocureable coating as well as preparation and application thereof. The composite UV photocureablecoating provided by the invention has relatively high molecular weight and silicon/fluorine content; by introducing organic silicon into the polyurethane coating, the hydrophobicity, weather resistance, wear resistance, cold resistance, biocompatibility, aging resistance and other properties of the modified polyurethane coating can be obviously enhanced, and the polyurethane coating has the advantages of low cost, low VOC, favorable coating adaptability, no toxicity, no irritation and the like, and is easy to clean. In addition, the composite UV photocureable coating is prepared by adding anorganic fluorine polymer with photosensitivity for compounding, so that the composite UV photocureable coating has the properties of low surface energy, acid and alkali resistance, good transparency and the like by virtue of a small amount of fluorine-containing prepolymer modified coating; in addition, organic fluorine and waterborne polyurethane are compounded at the molecular level, the modification effect of the fluorine-containing prepolymer on polyurethane is exerted to the maximum extent, and the fluorine-containing prepolymer can be applied to the fields of electronic packaging, building coatings, metal coatings and the like.

Description

technical field [0001] The invention belongs to the field of UV light-curing coatings, and in particular relates to a silicone / organic fluorine double-modified polyurethane composite UV light-curing coating and a preparation method and application thereof. Background technique [0002] UV-cured polyurethane coatings have good adhesion, strong wear resistance, excellent optical properties and weather resistance, and are widely used in many industries such as electronics, printing, wood, and home appliances. However, light-cured polyurethane coatings still have durability and Acidity and alkalinity, water resistance, poor hardness and other problems, the above shortcomings limit the wider application of polyurethane coatings in the fields of superhydrophobic self-cleaning coatings, electronic packaging, architectural coatings, and metal coatings. [0003] Silicone materials combine the characteristics of organic compounds and inorganic compounds, and have excellent properties ...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D7/62C08G18/75C08G18/42C08G18/10C08G18/67C08G18/62
CPCC09D175/14C09D7/62C08G18/755C08G18/4277C08G18/10C08G18/673C08G18/672C08G18/6279C08L2205/025C08L2205/035C08L2201/10C08L75/14C08K9/06C08K3/36C08G18/62
Inventor 刘伟区陈国阳梁利岩
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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