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Preparation method of waterborne polyurethane containing fluorescent dye

A technology of water-based polyurethane and fluorescent dye, applied in the field of fluorescent water-based polyurethane, can solve the problems of limited dispersion and uneconomical artificial synthesis of fluorescent powder.

Active Publication Date: 2013-09-04
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited degree of dispersion, the amount of phosphor added in this method is 15% to 25%, which is not economical for more expensive synthetic phosphors

Method used

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  • Preparation method of waterborne polyurethane containing fluorescent dye
  • Preparation method of waterborne polyurethane containing fluorescent dye
  • Preparation method of waterborne polyurethane containing fluorescent dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Dissolve 17 mg of hydroxyl-containing fluorescent dye A in 5 g of N,N-dimethylformamide to obtain a solution of fluorescent dye A in N,N-dimethylformamide. in N 2 Under the protection of 110°C vacuum dehydration for 2 hours, 40g of polyoxypropylene triol, 13.76g of 4,4'-dicyclohexylmethane diisocyanate (HMDI) and N,N-dimethylformamide of fluorescent dye A The solution was placed in a 250ml three-neck flask and reacted at 80°C for 2 hours, then added 2.18g of dimethylolpropionic acid and 1.26g of 1,4-butanediol, added 0.06g of dibutyltin dilaurate, and 0.06g of stannous octoate g, 60g of acetone, reacted at 60°C for 6 hours, cooled to 20°C and discharged to obtain a fluorescent water-based polyurethane prepolymer; pour the prepolymer into an emulsification tank, and add triethylamine at a speed of 3000r / min 2.26g was neutralized, and 150g of water was added, and emulsified to obtain light yellow-green translucent fluorescent water-based polyurethane emulsi...

Embodiment 2

[0043] Example 2: Dissolve 622 mg of hydroxyl-containing fluorescent dye A with 30 g of N-methylpyrrolidone to obtain a solution of fluorescent dye A in N-methylpyrrolidone. in N 2 40g of polyethylene adipate diol, 13.76g of 4,4'-dicyclohexylmethane diisocyanate (HMDI), 13.76g of hexamethylene diisocyanate (HDI ) 5g and N-methylpyrrolidone solution of fluorescent dye A were placed in a 250ml three-necked flask, reacted at 90°C for 2 hours, then added dimethylol propionic acid 2.18g and ethylene glycol 1.26g, added dilauric acid di 0.06 g of butyltin, 0.06 g of stannous octoate, and 60 g of acetone were reacted at 60° C. for 6 hours. Cool down to 20°C and discharge to obtain a fluorescent water-based polyurethane prepolymer; pour the prepolymer into an emulsification tank, add 2.26 g of triethylamine to neutralize it at a speed of 3000 r / min, add 245 g of water to emulsify, and obtain a yellow-green color Translucent fluorescent water-based polyurethane emulsion.

Embodiment 3

[0044] Example 3: Dissolve 7 mg of hydroxyl-containing fluorescent dye A in 5 g of N,N-dimethylacetamide to obtain a solution of fluorescent dye A in N,N-dimethylacetamide. in N 2 Under the protection of 110°C vacuum dehydration for 2 hours, 30g of polyoxypropylene diol, 30.45g of toluene diisocyanate (TDI) and N,N-dimethylacetamide solution of fluorescent dye A were placed in a 250ml three-necked flask , react at 80°C for 2 hours, then add 5.59g of dihydroxy half ester and 1.26g of diethylene glycol, add 0.5g of 1,4-butanediol, add 0.06g of dibutyltin dilaurate, 0.06g of stannous octoate g, 60g of acetone, react at 60°C for 6 hours and then cool down to 20°C to obtain a fluorescent water-based polyurethane prepolymer; pour the prepolymer into an emulsification tank, and add 2.7g of triethylamine at a speed of 3000r / min Neutralize, add 225g of water for emulsification, and obtain light yellow-green translucent fluorescent water-based polyurethane emulsion.

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Abstract

The invention discloses a preparation method of waterborne polyurethane containing a fluorescent dye, comprising the following steps: carrying out a reaction between the fluorescent dye containing reactive hydrogen and isocyanate and grafting parent dyes on polyurethane molecular chains, carrying out methods such as chain extension, crosslinking, side suspension of active groups and introduction of a hydrophilc agent, introducing crosslinking points, active groups and hydrophilic groups on the polyurethane chains, making molecular weight large enough, neutralizing and emulsifying to prepare the waterborne polyurethane fluorescent dye. The fluorescent polyurethane prepared by the preparation method still has strong two-photon effect and photoluminescence effect in an aqueous phase and an adhesive film. Thus, the waterborne polyurethane containing the fluorescent dye can be applied in aspects of anti-counterfeiting mark, traffic sign, biological development, biological detection, medicine tracing, chemical detection, fluorescent ink, fluorescent paint and the like.

Description

technical field [0001] The invention belongs to the technical field of fluorescent waterborne polyurethane, and in particular relates to a preparation method of fluorescent dye-containing waterborne polyurethane. Background technique [0002] Fluorescent dyes are a class of materials that have developed rapidly in recent years. It can control the fluorescence wavelength, fluorescence intensity and two-photon effect through molecular design. Therefore, fluorescent dyes can be used in anti-counterfeiting signs, traffic signs, biological imaging, biological detection, chemical detection, fluorescent inks, fluorescent paints, etc. [0003] However, fluorescent dyes also have their drawbacks. For example, the synthesis steps are complicated, the synthesis cost is high, the environmental requirements are relatively harsh during application, and it is easy to age. Even some fluorescent dyes cannot be well dispersed in water, and the fluorescence will be weakened, quenched or dir...

Claims

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Application Information

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IPC IPC(8): C08J3/03C08G18/12C08G18/66C08G18/30
Inventor 许戈文王继印田玉鹏杨俊松
Owner ANHUI UNIVERSITY
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