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Water-soluble fluorescent colorant, ink containing water-soluble fluorescent colorant and preparation method of ink

A fluorescent coloring agent, water-soluble technology, applied in ink, household utensils, applications, etc., can solve the problems of reduced color intensity, weakened fluorescence intensity of stitches, ink instability, etc., to reduce the degree of fluorescence quenching and improve intermittent Good writing time and storage stability

Pending Publication Date: 2020-04-03
SHANGHAI NNW NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are differences in dispersion stability among pigment paste systems. Mixing and matching different pigment pastes will cause ink instability and limit the richness of colors.
[0003] Few types of water-soluble fluorescent dye toners are suitable for writing pen inks, and cannot provide the rich colors that consumers demand
After the ink is written and dried, the fluorescence quenching phenomenon occurs due to the accumulation of water-soluble fluorescent dye molecules, which leads to the reduction of the color intensity of the unit dye molecule, the weakening of the fluorescence intensity of the thread, and the use effect is not good.
Although there are many fluorescent dye molecules on the market, their water solubility is poor.

Method used

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  • Water-soluble fluorescent colorant, ink containing water-soluble fluorescent colorant and preparation method of ink
  • Water-soluble fluorescent colorant, ink containing water-soluble fluorescent colorant and preparation method of ink
  • Water-soluble fluorescent colorant, ink containing water-soluble fluorescent colorant and preparation method of ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A water-soluble fluorescent colorant, the water-soluble fluorescent colorant consists of a carrier containing a fluorescent chromophoric group and a hydrophilic group R inserted into the carrier n Composed of two parts, the fluorescent chromophore is one of the structures of fluorane derivatives, triaryl methanes, anthraquinones, naphthalimides, and benzothiadiazoles, and the hydrophilic group R n Contains the hydrophilic segment PEG, and the chemical structural formula of the hydrophilic group is shown in formula (I):

[0027]

[0028] Wherein, n=2-15 in the hydrophilic segment PEG, corresponding to a molecular weight of 400-3000. The water-soluble macromolecular chain needs to have a branched large-volume molecular structure, which can prevent the formation of direct accumulation between fluorescent molecules during the drying process of the ink trace after ink writing, avoiding the occurrence of fluorescence quenching and reduction of fluorescence efficiency . T...

Embodiment 2

[0031] A water-soluble fluorescent colorant, the water-soluble fluorescent colorant consists of a carrier containing a fluorescent chromophoric group and a hydrophilic group R inserted into the carrier n Composed of two parts, the fluorescent chromophore is one of the structures of fluorane derivatives, triaryl methanes, anthraquinones, naphthalimides, and benzothiadiazoles, and the hydrophilic group R n Contains the hydrophilic segment PEG, and the chemical structural formula of the hydrophilic group is shown in formula (I):

[0032]

[0033] In this embodiment, n=4-8 in the hydrophilic segment PEG, corresponding to a molecular weight of 800-1500.

[0034] Hydrophilic group R n Examples are as follows:

[0035]

[0036] Examples of water-soluble fluorescent colorants include:

[0037] The model is defined as Y-1 type;

[0038] The model is defined as R-1 type;

[0039] The model is defined as R-2 type;

[0040] The model is defined as O-1 type;

[0041] ...

Embodiment 3

[0043] An environment-friendly pen ink, the ink is composed of the following components in mass percentage:

[0044]

[0045] In this embodiment, the moisturizing agent is at least one of propylene glycol, glycerin, butylene glycol, diethylene glycol, urea, tartaric acid, and polyethylene glycol.

[0046] In this embodiment, the resin is polyvinylpyrrolidone (PVP) or polyvinyl alcohol (PVA). The fungicide is one of phenoxyethanol, Bropol, and hexachlorophenyl ether.

[0047] In this embodiment, the solvent is one of water, ethanol, isopropanol, n-propanol, propylene glycol methyl ether, and ethylene glycol methyl ether. Based on environmental protection and cost considerations, water is the best choice, and the color scheme in this embodiment is based on water as a solvent. The color scheme example of this embodiment:

[0048]

[0049] Comparative Test 1: Comparison of Intermittent Writing Time

[0050] Intermittent writing time h fluorescent yellow ...

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Abstract

The invention discloses a water-soluble fluorescent colorant, ink containing the water-soluble fluorescent colorant and a preparation method of the ink. The water-soluble fluorescent colorant is formed by combining a carrier containing a fluorescent chromophoric group and a hydrophilic group connected into the carrier, the fluorescent chromophoric group is one of fluorane derivatives, triarylmethane, anthraquinones, naphthalimides and benzothiadiazole structures, and the hydrophilic group comprises a hydrophilic chain segment PEG. The water-soluble fluorescent colorant provided by the invention has good compatibility, and the water-soluble fluorescent colorant can be combined into various colors according to the will of consumers; the fluorescent chromophoric group has steric hindrance ofa macromolecular hydrophilic chain segment PEG, so that the fluorescence quenching degree is reduced after drying, and the unit molecular fluorescence intensity is high; the ink prepared from the water-soluble fluorescent colorant is a single-phase liquid system and has good storage stability; and the solid content of the water-soluble fluorescent colorant is low, so that the intermittent writingtime of a highlighter can be remarkably prolonged.

Description

technical field [0001] The invention relates to the technical field of writing inks, in particular to a water-soluble fluorescent colorant, an ink containing it and an ink preparation method. Background technique [0002] Highlighter is a kind of stationery that consumers, especially students, often contact and use. The writing lines have a fluorescent effect under sunlight. At present, the colorant composition of the ink in the commercially available highlighter mainly adopts the water-based pigment fluorescent color paste in the printing and dyeing or printing field, and a small number of water-soluble dye toners are used, but both have limitations. Water-based pigment fluorescent color paste is generally a dispersion system prepared by wrapping fluorescent dye with resin by emulsion polymerization. The particle size is about 100-500nm. It is mainly used in the fields of plastic processing and dyeing and finishing. Fluorescent inks containing such water-based pigment past...

Claims

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Application Information

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IPC IPC(8): C09D11/17
CPCC09D11/17
Inventor 钱炜梁龙杨朝应
Owner SHANGHAI NNW NEW MATERIALS TECH
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