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Blue solid glue stick with color being changed after application and preparation method thereof

A solid glue stick, blue technology, used in adhesives, monocarboxylic acid ester copolymer adhesives, N-vinylpyrrolidone copolymer adhesives, etc., can solve the problem of short shelf life, variable color solid glue color instability and other problems, to achieve the effect of long shelf life, strong adhesion, and stable colloid color.

Inactive Publication Date: 2011-07-27
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also a purple color-changing solid glue on the market. The coating will become colorless when used, but the color of this color-changing solid glue is unstable and has a short shelf life. The purple glue will gradually fade to white after long-term storage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of blue solid glue stick that can change color after use of the present embodiment, in percentage by weight, the adhesive is 16.4% polyvinyl formal, the moisturizing agent is 4% glycerin, and the excipient is 5% stearin Sodium acid, the developer is 0.1% thymolphthalein, 0.5% sodium hydroxide, and 74% water.

[0025] A preparation method of a blue solid glue stick that will change color after use in this embodiment, first add 74% water to the reaction kettle, add 16.4% polyvinyl formal while heating as an adhesive and stir, the adhesive After dissolving, add 5% sodium stearate as an excipient and 4% glycerin as a humectant, add 0.5% sodium hydroxide to adjust the pH value of the material to 9 to 14, stir at a constant temperature and add 0.1% Thymolphthalein is used as a color developer, and finally stirred evenly and filled, and a blue solid glue stick is obtained after cooling.

Embodiment 2

[0027] In terms of weight percentage, the adhesive is 8% polyvinyl formal and 10% polyvinylpyrrolidone, the humectant is 8% ethylene glycol, and the excipient is 5% sodium stearate and 2% stearin Calcium acid, the developer is 1% thymolphthalein, 1% sodium hydroxide, and 65% water.

[0028] A preparation method of a blue solid glue stick that changes color after use in this embodiment, first add 65% water to the reaction kettle, and add 8% polyvinyl formal and 10% polyvinylpyrrolidone while heating Use as an adhesive and stir, after the adhesive dissolves, add 5% sodium stearate and 2% calcium stearate as excipients and 8% ethylene glycol as a humectant, plus 1% sodium hydroxide Adjust the pH value of the material to 9 to 14, stir evenly at a constant temperature, add 1% thymolphthalein as a color developer, and finally stir evenly and fill it, and obtain a blue solid glue stick after cooling.

Embodiment 3

[0030] In percent by weight, the adhesive is 30% polyvinylpyrrolidone, the humectant is 3% glycerin and 5% ethylene glycol, the excipient is 10% sodium stearate, and the color developer is 3% thyme Phenolphthalein, 1% Sodium Hydroxide, 48% Water.

[0031] A kind of preparation method of the blue solid glue stick that can change color after use in this embodiment, first add 48% water in the reactor, while heating, add 30% polyvinylpyrrolidone as adhesive and stir, after the adhesive dissolves Add 10% sodium stearate as an excipient, 3% glycerin and 5% ethylene glycol as a humectant, add 1% sodium hydroxide to adjust the pH value of the material to 9 to 14, and stir at a constant temperature Finally, 3% thymolphthalein was added as a color developer, and finally stirred evenly and filled, and a blue solid glue stick was obtained after cooling.

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PUM

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Abstract

The invention discloses a blue solid glue stick with the color being changed after application and a preparation method thereof. The blue solid glue stick comprises adhesives, humectant, excipient and visualization reagents and is characterized in that a body of the solid glue stick is blue; when in use, a coating is initially blue and then faded quickly to be colourless; and raw materials comprise the following components in percentage by weight: 4 percent to 50 percent of adhesives, 1 percent to 20 percent of humectant, 2 percent to 20 percent of excipient, 0.01 percent to 5 percent of visualization reagents, 0.1 percent to 3 percent of sodium hydroxide and 20 percent to 75 percent of water, and the total content of the components is 100 percent. When coated on paper, the blue solid glue stick is initially blue and then faded in a short time to be colourless; and the blue solid glue stick has the advantages of high adhesive force, long shelf life and stable glue color after long-term storage.

Description

technical field [0001] The invention relates to a fixed glue stick, in particular to a blue solid glue stick which changes color after use and a preparation method thereof. Background technique [0002] Invention patent application name: a solid glue stick and its preparation method, patent application number: 200810054485.7 discloses a new type of solid glue stick, this solid glue stick is made of water-based polyurethane as the main glue component, water as the solvent, and hard Sodium fatty acid is used as a gelling agent, polyvinyl alcohol and polyvinyl pyrrolidone are used as auxiliary agents, and an appropriate amount of moisturizing agent glycerin is added. The weight percentage of each raw material component is: water-based polyurethane emulsion 28-45%, stearin Sodium phosphate 7-12%, water 30-45%, glycerin 1-10%, polyvinyl alcohol 0-8%, polyvinylpyrrolidone 7-12%, the preparation method of this solid glue stick consists of three steps: water-based polyurethane Prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J9/00C09J129/14C09J139/06C09J129/04C09J133/00C09J131/04C09J103/02
Inventor 钟国伦徐金宝
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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