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Allochroic solid adhesive and preparation method thereof

A technology of adhesives and solids, applied in the direction of adhesives, adhesive types, ester copolymer adhesives, etc., can solve the problems of purple degeneration into off-white, loss of original characteristics, etc., and achieve low cost, easy manufacturing, and formulation reasonably simple effect

Inactive Publication Date: 2009-12-23
NINGBO SONGHE STATIONERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this color-changing solid adhesive is that the purple color quickly fades to off-white during storage and loses its original characteristics. At present, this problem has not been fundamentally solved in China.

Method used

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Examples

Experimental program
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Embodiment Construction

[0016] Below in conjunction with embodiment the present invention is described in further detail.

[0017] A preparation method of a highly stable color-changing solid adhesive: add all raw materials in the following proportions by weight to a reaction kettle at 50-100°C: 50-75 parts of dispersant water, 10-45 parts of adhesive such as polyvinyl Pyrrolidone, 5-18 parts of excipients such as sodium stearate, 5-15 parts of humectants such as glycerol, 0.1-1 part of color developer phenolphthalein and appropriate amount of color stabilizer, stirred and mixed at 80-100 ° C for one hour, Adjust the pH to 9-11, then keep it at constant temperature for one hour, fill the bottle, and obtain a purple solid adhesive.

[0018] Specific implementation example 1

[0019] Add 57 parts of water to the reaction kettle, start stirring, add 1.5 parts of sodium hydroxide, 8 parts of sodium stearate, heat up to 85°C and keep the temperature until dissolved, add 15 parts of polyvinylpyrrolidone, ...

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Abstract

The invention discloses a high-stability allochroic solid adhesive and a preparation method thereof. The allochroic solid adhesive is prepared by the method according to the following steps: adding all the following raw materials in portion by weight into a reaction kettle of which the temperature is between 50 and 100 DEG C: 50 to 75 portions of dispersant water, 10 to 45 portions of bonding agent such as polyvinyl pyrrolidone, 5 to 18 portions of excipient such as sodium stearate, 5 to 15 portions of humectant such as glycerol, 0.1 to 1 portion of developer phenolphthalein, and proper amount of color stabilizer; stirring the raw materials at a temperature of between 80 and 100 DEG C for one hour, and then adjusting the pH to between 9 and 11; and then standing the mixture at a constant temperature, and bottling the mixture to obtain a purple solid adhesive. The allochroic solid adhesive has a reasonable and simple formulation, easy manufacture and production and low cost; the colloid is purple when the allochroic solid adhesive is coated on a substrate material, and the purple disappears in a short time to meet the requirements in specific fields; besides, the allochroic solid adhesive has the most prominent characteristic that the color is stable during storage and is basically unchanged for more than two years.

Description

technical field [0001] The invention relates to the technical field of a color-changing solid adhesive and its related preparation method. Background technique [0002] The first solid adhesive invented is to use modified polyvinyl alcohol (PVA) as the adhesive component. It has low cohesiveness, short storage period, and is easy to gel, but the cost is low. It is still the main product in the domestic market. Due to the above shortcomings, there is a tendency to be gradually replaced by PVP solid glue. In recent years, high-cohesive solid adhesives have been researched and produced, mainly using polyvinylpyrrolidone (PVP) as the adhesive component, which has high cohesiveness, good temperature resistance, and long storage period, but the cost is relatively high. It will become the main product in the domestic market in the future. At the same time, special solid adhesives have also been developed, such as pressure-sensitive solid adhesives, colored solid adhesives and col...

Claims

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Application Information

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IPC IPC(8): C09J139/06C09J129/04C09J133/08C09J9/00
Inventor 高松鹤刘德辉
Owner NINGBO SONGHE STATIONERY
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