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.
CN103275334AActive Publication Date: 2013-09-04ANHUI UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ANHUI UNIVERSITY
Publication Date
2013-09-04

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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.
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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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