Color-changeable correction glue stick and preparation method thereof

A glue stick and white technology, which is applied in the field of discolored correction glue sticks and its preparation, can solve the problems of rough coating surface, users can’t be sure that the coating is sufficiently dry to meet the writing standard, and wrongly marked parts are exposed. Thin and firm layer, good re-writability, and high tear strength

Inactive Publication Date: 2011-08-24
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After the existing correction glue stick is used, it needs to wait for the coating to dry before writing, but the user cannot be sure when the coating has dried enough to meet the writing standard
If the user does not wait enough time, the writing pen will scratch the partially dried coating, causing the mismark to be partially exposed and the surface of the coating will be rough, and the user will have to reapply another coat of correction glue stick and wait to dry again

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] A kind of preparation method of the correction glue stick that can change color of the present invention is characterized in that: by weight percentage, comprises the following steps:

[0028] Step 1. Put 3% to 20% of polyvinyl alcohol and 20% to 75% of water into the reactor at one time in proportion, and dissolve completely at 85°C to 95°C;

[0029] Step 2, after cooling down to 80°C to 90°C, add 0.1% to 2.3% hydrochloric acid to adjust the pH of the solution to 2 to 3;

[0030] Step 3, slowly add 1% to 6% formaldehyde and keep it warm for 0.5 to 2 hours;

[0031] Step 4, after cooling down to 70°C to 85°C, add an appropriate amount of sodium hydroxide to raise the pH of the material to neutral;

[0032] Step 5, add 3.2% to 13% stearic acid to dissolve, then add sodium hydroxide to react, the total amount of sodium hydroxide is 0.3% to 3%;

[0033] Step 6. After the reaction, add 1% to 15% of moisturizing agent, stir evenly, add 5% to 70% of covering agent, and fina...

Embodiment 1

[0037] A kind of correction glue stick that can change color in this embodiment, in terms of weight percent, is the raw material components: polyvinyl alcohol 6.7%, formaldehyde 2.5%, moisturizing agent is 4% glycerin, covering agent is 15% titanium dioxide And 15% talcum powder, 0.1% phenolphthalein color developer, 5% stearic acid, 1% sodium hydroxide, 1.3% hydrochloric acid, 3% urea, 46.4% water; the sum of the contents of the above components is 100%.

[0038] A kind of preparation method of the correction glue stick that can change color of the present embodiment, by weight percentage, comprises the following steps:

[0039] Step 1. Put 6.7% polyvinyl alcohol and 46.4% water into the reactor at one time in proportion, and dissolve completely at 85°C to 95°C;

[0040] Step 2. After cooling down to 80°C to 90°C, add 1.3% hydrochloric acid to adjust the pH of the solution to 2 to 3;

[0041] Step 3, slowly add 2.5% formaldehyde and keep it warm for 0.5 to 2 hours;

[0042]...

Embodiment 2

[0047] A kind of correction glue stick that can change color in this embodiment, in terms of weight percentage, is the raw material components: polyvinyl alcohol 8%, formaldehyde 3%, moisturizing agent 5% ethylene glycol, covering agent 35% Titanium dioxide, 1% o-cresolphthalein as developer, 5% stearic acid, 2.3% sodium hydroxide, 1.3% hydrochloric acid, 4% urea, 35.4% water; the total content of the above components is 100%.

[0048]A kind of preparation method of the correction glue stick that can change color of the present embodiment, by weight percentage, comprises the following steps:

[0049] Step 1. Put 8% polyvinyl alcohol and 35.4% water into the reactor at one time in proportion, and dissolve completely at 85°C to 95°C;

[0050] Step 2. After cooling down to 80°C to 90°C, add 1.3% hydrochloric acid to adjust the pH of the solution to 2 to 3;

[0051] Step 3, slowly add 3% formaldehyde and keep it warm for 0.5 to 2 hours;

[0052] Step 4, after cooling down to 70°...

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PUM

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Abstract

The invention discloses a color-changeable correction glue stick and a preparation method thereof, wherein the change of coating color is used as a signal indicating the sufficient drying of the coating so as to prompt a user whether the coating is available for writing or printing. The color-changeable correction glue stick comprises the following raw materials: 3-20% of polyvinyl alcohol, 1-6% of formaldehyde, 1-15% of humectant, 5-70% of covering agent, 0.01-3% of color developing agent, 3.2-13% of stearic acid, 0.3-3% of sodium hydroxide, 0.1-2.3% of hydrochloric acid and 20-75% of water. The body of the correction glue stick is a color solid stick; after the correction glue stick is coated on paper, the coating is colorful initially, and when the coating is completely dry, the coating becomes white; any place needing to be corrected can be altered at will; the coating on the coated place is thin and firm and has a soft and smooth surface and good re-writability; moreover, the correction glue stick can be used for pasting paper, and 1 minute later, the paper is difficult to tear off; and the correction glue stick can replace the existing correction products and stationery glue products, has low cost and is convenient for consumers.

Description

technical field [0001] The invention relates to a character correction tool, in particular to a color-changing correction glue stick and a preparation method thereof. Background technique [0002] Correction glue stick is a stationery product that integrates text correction on paper and paper pasting. It is used as an adhesive in the same way as solid glue; as a text correction product, it is applied to the surface of paper and then allowed to dry to form a film that covers the surface with erroneous marks and, when dry, can be written on the coating of a correction glue stick to form a corrected mark. [0003] Invention patent name: green environment-friendly text correction stick and its preparation method, patent application number 200410052707.3 discloses a green environment-friendly text correction stick and its preparation method. It is in a stirred tank at normal pressure, first add palmitic acid 10% to 40% and terpene resin 10% to 40% by weight, heat it to 80°C to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D10/00C09J9/00C09J129/14
Inventor 钟国伦徐金宝
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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