A kind of mineral-containing bleaching glue and its preparation process

A technology of bleaching glue and minerals, applied in the direction of unsaturated alcohol copolymer adhesive, adhesive type, starch adhesive, etc., can solve the problems of high cost and complicated operation, and achieve the effect of reducing production cost

Active Publication Date: 2021-11-19
濮阳圣恺环保新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this patent can bleach kaolin, it needs heating and stirring, neutralization, pressure filtration and other processes, and the operation is complicated and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation process of mineral-containing bleaching glue, comprising the following steps:

[0021] (1) Dissolve 10g of caustic soda in 500mL of water at room temperature, then add 50g of starch under constant stirring, stir evenly, heat to 80°C, and stir for 15 minutes;

[0022] (2) Under the condition of maintaining 80°C, add 15g of kaolin and stir evenly, then add 1g of thiourea dioxide, and continue stirring for 10min to obtain mineral-containing bleaching glue.

Embodiment 2

[0024] A preparation process of mineral-containing bleaching glue, comprising the following steps:

[0025] (1) At room temperature, add 15g of caustic soda to 500mL of water to dissolve, then add 100g of polyvinyl alcohol under constant stirring (according to the required viscosity, choose polyvinyl alcohol with different molecular weight, for example, you can choose the average molecular weight of 110000-130000) , after stirring evenly, heat to 85°C and stir for 20min;

[0026] (2) Under the condition of maintaining 85°C, add 35g of kaolin and stir evenly, then add 2g of thiourea dioxide, and continue stirring for 20min to obtain the mineral-containing bleaching glue.

Embodiment 3

[0028] A preparation process of mineral-containing bleaching glue, comprising the following steps:

[0029] (1) Dissolve 20g of caustic soda in 500mL of water at room temperature, and then add the mixture of starch and polyvinyl alcohol under constant stirring, wherein the amount of starch is 50g, and the amount of polyvinyl alcohol is 100g. After stirring evenly, Heat to 95°C and stir for 20 minutes;

[0030] (2) Under the condition of maintaining 95°C, add 75g of kaolin and stir evenly, then add 2.5g of thiourea dioxide, and continue stirring for 30min to obtain mineral-containing bleaching glue.

[0031] Compared with the glue that uses unbleached kaolin, the blue light whiteness of the glue obtained in Examples 1 to 3 of the present invention is increased from 66 to 85-89, and the whiteness of the glue that uses the conventional process to bleach kaolin is 82-84, And after the glues of Examples 1 to 3 of the present invention were placed for two days, the whiteness was st...

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Abstract

The present invention aims at the problem of deep color of glue with kaolin as filler in the prior art, and provides a mineral-containing bleaching glue and its preparation process, which includes the following steps: (1) adding caustic soda to water at room temperature to dissolve , and then add rubber raw materials under the condition of constant stirring, after stirring evenly, heat to 80-95°C, and stir for 15-20min; Thiourea dioxide, continue stirring for 10-30min, can obtain mineral-containing bleaching glue; the present invention uses thiourea dioxide to utilize heating and caustic soda when making glue, and ferric iron in kaolin is reduced to ferrous iron to realize the bleaching of kaolin.

Description

technical field [0001] The invention belongs to the technical field of preparation of paper tube glue and corrugated paper glue, and in particular relates to a mineral-containing bleaching glue and a preparation process thereof. Background technique [0002] Thiourea dioxide is a stable compound at room temperature. It needs to be alkaline above 60°C to release hyposulfuric acid and play the role of reduction and bleaching. Minerals such as kaolin are used as fillers in the production of paper tube glue and corrugated paper glue, but ordinary unbleached kaolin has a darker color, which affects the effect after use, such as reducing the whiteness of white board paper. Thiourea dioxide, on the other hand, requires heating to remove iron from kaolin during mineral bleaching. Chinese invention patent CN201610603695 discloses a method for removing iron in kaolin, which includes the following steps: ① select kaolin with an iron content below 0.8%, and make slurry with a slurry co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J103/02C09J129/04C09J11/04
CPCC08K2003/3009C08L2201/08C09J11/04C09J103/02C09J129/04C08K3/346C08K3/30C08L3/02
Inventor 陈玮代开磊赵红阳陈志勇宋建德周星奎叶小好魏丽丽邢燕燕林建福张乾霖潘冬
Owner 濮阳圣恺环保新材料科技股份有限公司
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