CN111548675A - Self-luminous neutral ink for writing in dark room and preparation method thereof - Google Patents

Abstract

The invention relates to self-luminous neutral ink for writing in a darkroom and a preparation method thereof, wherein the neutral ink comprises the following components in percentage by mass: 5-20% of fluorescent pigment, 5-30% of noctilucent material, 2-15% of resin, 2-10% of coating material, 0.1-0.2% of antirust agent, 1-5% of lubricant, 5-15% of humectant, 0.1-0.3% of pH regulator, 0.2-1% of thixotropic auxiliary agent and the balance of deionized water. According to the invention, the fluorescent pigment and the noctilucent material are coated, so that the system is stable, the fluorescent material can be kept stable for a long time, the structure is not easy to damage, the color keeps bright and fluorescent effect for a long time, and the practicability is better. Harmful preservative is not used in the formula, and the product is safer and more environment-friendly.

Description

Self-luminous neutral ink for writing in dark room and preparation method thereof

Technical Field

The invention belongs to the field of neutral ink, and particularly relates to self-luminous neutral ink for writing in a dark room and a preparation method thereof.

Background

The fluorescent neutral ink is popular with consumers because of its unique properties, and in order to make the fluorescent ink have the properties of water resistance, acid and alkali resistance, weather resistance and the like, a pigment-type fluorescent substance needs to be used, but the pigment-type fluorescent compound is very difficult to disperse in water, and the current commercially available pigment-type fluorescent neutral inks have the problem of poor dispersion stability in different degrees. In addition, the existing product has single fluorescence color, and the fluorescence effect becomes dark gradually after the light source disappears until the light source disappears, and the irradiation light source is required to be energized again. Most of the existing products have the defects of dim fluorescence in a darkroom, short fluorescence time and the like.

Disclosure of Invention

The invention aims to solve the technical problem of providing the self-luminous writing neutral ink in a darkroom and the preparation method thereof, solve the problem that most fluorescent neutral ink formulations gradually weaken until the fluorescent effect disappears along with the prolonging of time, and keep the color bright and stable for a long time.

The invention provides self-luminous neutral ink for writing in a darkroom, which comprises the following raw materials in percentage by mass: 5-20% of fluorescent pigment, 5-30% of noctilucent material, 2-15% of resin, 2-10% of coating material, 0.1-0.2% of antirust agent, 1-5% of lubricant, 5-15% of humectant, 0.1-0.3% of pH regulator, 0.2-1% of thixotropic auxiliary agent and the balance of deionized water.

The fluorescent pigment is one or more of anthrone, triarylmethane, phthalocyanine pigment or dye.

The luminescent material is a rare earth luminescent material (provided by first industrial co., ltd. japan).

The resin is one or more of acrylic acid, ethylene-vinyl acetate copolymer and polyurethane.

The coating material is prepared from one or more of PVP15, PVP30, PVP60 and PVP90, Tego755 and fatty alcohol-polyoxyethylene ether according to the mass ratio of 0.5-1:1-2: 1-2.

The antirust agent is one or more of benzotriazole, tolyltriazole and dicyclohexylammonium nitrate.

The lubricant is one or more of polyoxyethylene alkali metal salt, dicarboxylic acid amide, phosphate, oleoyl sarcosinate and decaglycerol monooleate (which can play a role in sterilization and corrosion prevention).

The humectant is one or more of decaglycerol (with antibacterial and antiseptic effects), glycerol, propylene glycol, and polypropylene glycol.

The pH regulator is sodium hydroxide or ammonia water.

The thixotropic auxiliary agent is one or more of xanthan gum, locust bean gum and welan gum.

The invention also provides a preparation method of the self-luminous neutral ink for writing in the darkroom, which comprises the following steps:

selecting PVP (polyvinyl pyrrolidone) to prepare an aqueous solution according to the proportion, mixing the aqueous solution with Tego755 and fatty alcohol-polyoxyethylene ether according to the mass ratio of 0.5-1:1-2:1-2, adding the fluorescent pigment and the noctilucent material after preparing the aqueous solution, stirring at a high speed to pre-disperse the mixture into viscous slurry, and adding other raw materials for grinding to obtain the neutral ink.

Advantageous effects

According to the invention, through formula optimization, the surface of the fluorescent pigment is coated firstly. The coating substance is a colorless transparent material, and the thickness of the coating film is in the nanometer level, which is beneficial to the stable dispersion of the surface of the fluorescent pigment in the system. The coating is completed by utilizing the electrostatic interaction between molecules when the coating is dispersed in a system, a special chemical reaction is not needed, the operation is simple and reliable, and the practicability is strong. The invention has stable system, long-term stability of the fluorescent substance, difficult damage of the structure, long-term color brightness and fluorescent effect maintenance, and better practicability.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

Example 1

0.5g of PVP30, 1g of Tego755 and 1g of fatty alcohol-polyoxyethylene ether are prepared to obtain the coating material. Mixing the coating material with 32.5g of deionized water, adding 3g of red fluorescent pigment and 12g of noctilucent material, stirring and dispersing to obtain viscous slurry, grinding 0.3mm zirconium beads for 1 hour, adding 5g of propylene glycol and 5g of decaglycerol, and quickly stirring for 0.5 hour. Then, 0.1g of rust inhibitor (benzotriazole) and 2g of lubricant (decaglycerol oleate) were added thereto, and the mixture was rapidly stirred for 1 hour. Then adding 5g of acrylic emulsion and 0.2g of pH regulator (ammonia water), stirring for 0.5h, then adding 0.5g of xanthan gum, supplementing water to 100g, quickly stirring for 2 h, and filtering to remove large-particle impurities to obtain the finished product.

Example 2

0.5g of PVP (K30: K90 is 1:1), 1.5g of Tego755 and 1g of fatty alcohol-polyoxyethylene ether are prepared to obtain the coating material. Mixing the coating material with 45g of deionized water, adding 5g of blue fluorescent pigment and 14g of noctilucent material, stirring and dispersing to obtain viscous slurry, grinding zirconium beads with the diameter of 0.3mm for 1 hour, then adding 10g of humectant (decaglycerol), and rapidly stirring for 0.5 hour. Then, 0.1g of a rust preventive agent (benzotriazole) and 2g of a lubricant (dicarboxylic acid amide) were added thereto, and the mixture was rapidly stirred for 1 hour. Then 8g of acrylic emulsion and 0.4g of pH regulator (ammonia water) are added and stirred for 0.5h, then 0.3g of xanthan gum is added and water is added to 100 g. Stirring for 2 hours, and filtering to remove large-particle impurities to obtain a finished product.

Example 3

0.5g of PVP (K30: K90 is 1:1), 2g of Tego755 and 2g of fatty alcohol-polyoxyethylene ether are prepared to obtain the coating material. Mixing the coating material with 40g of deionized water, adding 5g of yellow fluorescent pigment and 15g of noctilucent material, stirring and dispersing to obtain viscous slurry, grinding 0.3mm zirconium beads for 1 hour, adding 7g of humectant (decaglycerol), and rapidly stirring for 0.5 hour. Then, 0.1g of rust inhibitor (benzotriazole) and 2g of lubricant (phosphate ester) were added thereto, and the mixture was rapidly stirred for 1 hour. Then 3g of acrylic emulsion and 0.2g of pH regulator (ammonia water) are added and stirred for 0.5h, then 0.2g of xanthan gum is added and water is added to 100 g. Stirring for 2 hours, and filtering to remove large-particle impurities to obtain a finished product.

Comparative example 1

The difference from example 1 is that no coating material was added, and the other is the same as example 1.

The tests show that the performance data of the examples 1-3 and the comparative example 1 are as follows:

as can be seen from the above table, the invention improves the color stability and the writing stability after the cladding, realizes the long-term stability of the noctilucent effect, has more outstanding practicability, and is more environment-friendly and healthy.

Claims (7)

1. A self-luminous neutral ink for writing in a dark room, which is characterized in that: the neutral ink comprises the following raw materials in percentage by mass: 5-20% of fluorescent pigment, 5-30% of noctilucent material, 2-15% of resin, 2-10% of coating material, 0.1-0.2% of antirust agent, 1-5% of lubricant, 5-15% of humectant, 0.1-0.3% of pH regulator, 0.2-1% of thixotropic auxiliary agent and the balance of deionized water.

2. The neutral ink according to claim 1, wherein: the fluorescent pigment is one or more of anthrone, triarylmethane, phthalocyanine pigment or dye.

3. The neutral ink according to claim 1, wherein: the resin is one or more of acrylic acid, ethylene-vinyl acetate copolymer and polyurethane.

4. The neutral ink according to claim 1, wherein: the coating material is prepared from one or more of PVP15, PVP30, PVP60 and PVP90, Tego755 and fatty alcohol-polyoxyethylene ether according to the mass ratio of 0.5-1:1-2: 1-2.

5. The neutral ink according to claim 1, wherein: the lubricant is one or more of polyoxyethylene alkali metal salt, dicarboxylic acid amide, phosphate, oleoyl sarcosinate and decaglycerol monooleate; the humectant is one or more of decaglycerol, glycerol, propylene glycol and polypropylene glycol.

6. The neutral ink according to claim 1, wherein: the pH regulator is sodium hydroxide or ammonia water; the thixotropic auxiliary agent is one or more of xanthan gum, locust bean gum and welan gum.

7. A method for preparing the self-luminous neutral ink for writing in a dark room as claimed in claim 1, comprising:

selecting PVP (polyvinyl pyrrolidone) to prepare an aqueous solution according to the proportion, mixing the aqueous solution with Tego755 and fatty alcohol-polyoxyethylene ether according to the mass ratio of 0.5-1:1-2:1-2, adding the fluorescent pigment and the noctilucent material after preparing the aqueous solution, stirring at a high speed to pre-disperse the mixture into viscous slurry, and adding other raw materials for grinding to obtain the neutral ink.