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Preparation method of biological starch base modified wallpaper gum

A technology of biological starch and wallpaper glue, applied in the directions of starch-derived adhesives, adhesive types, non-polymer adhesive additives, etc. ability, anti-aging effect

Inactive Publication Date: 2013-02-06
NINGBO YATE CHEM TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the wallpaper reinforcement glues sold in the market are polyvinyl acetal glue or polyvinyl acetate glue. The former contains free formaldehyde which is harmful to the human body, while the latter is troublesome to use and the price is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare bio-starch-based modified wallpaper glue according to the following steps in sequence:

[0027] Step 1: Mix 20g of waxy cornstarch with 80ml of water, heat to 85-90°C and keep it warm for 3 hours, while stirring at a speed of 65 rpm to completely gelatinize and obtain Mixture I.

[0028] Step 2: Cool down the mixture I to 60° C., add 2 mg of cyclodextrinase, adjust the pH value to 4.5, stir at a speed of 45 rpm, and allow the enzymolysis reaction for 3 hours to obtain the mixture II. The enzymatic hydrolysis completely removes the linear chains of the starch matrix.

[0029] Step 3, add 5g pregelatinized waxy cornstarch, 1mg cyclodextrinase, 5ml H 2 o 2 Solution (mass fraction is 30%), make it carry out oxidation and complexation reaction 2 hours;

[0030] Step 4, then add 0.5g sodium sulfite solid powder to the mixed material after the reaction of the step 3 to reduce the remaining H 2 o 2 Adjust the pH value to 6-8, add 3g of sodium benzoate, cool and dis...

Embodiment 2

[0035] Prepare bio-starch-based modified wallpaper glue according to the following steps in sequence:

[0036] Step 1: Mix 20g of waxy cornstarch with 80ml of water, heat to 85-90°C and keep it warm for 3 hours, while stirring at a speed of 50 rpm to completely gelatinize to obtain Mixture I.

[0037] Step 2: Cool down the mixture I to 60° C., add 3 mg of cyclodextrinase, adjust the pH value to 4.5, stir at a speed of 30 rpm, and allow the enzymolysis reaction for 3 hours to obtain the mixture II. The enzymatic hydrolysis completely removes the linear chains of the starch matrix.

[0038] Step 3, add 5g pregelatinized waxy cornstarch, 1mg cyclodextrinase, 5ml H 2 o 2 Solution (mass fraction is 30%), make it carry out oxidation and complexation reaction 2 hours; Obtain mixture III;

[0039] Step 4, then add 0.5g of anhydrous sodium sulfite solid powder to the mixture III to reduce the remaining H 2 o 2 Adjust the pH value to 6-8, add 3g of calcium propionate, cool and disc...

Embodiment 3

[0044] Prepare bio-starch-based modified wallpaper glue according to the following steps in sequence:

[0045] Step 1. Mix 20 g of cornstarch with 80 ml of water, heat to 85-90° C. and keep it warm for 3 hours while stirring at a speed of 100 rpm to completely gelatinize to obtain Mixture I.

[0046] Step 2: Cool down the mixture I to 60° C., add 3 mg of cyclodextrinase, adjust the pH value to 4.5, stir at a speed of 80 rpm, and allow enzymatic hydrolysis for 3 hours to obtain mixture II. The enzymatic hydrolysis completely removes the linear chains of the starch matrix.

[0047]Step 3, add 5g pregelatinized waxy cornstarch, 2mg cyclodextrinase, 5ml H 2 o 2 Solution (mass fraction is 30%), make it carry out oxidation and complexation reaction 2 hours; Obtain mixture III;

[0048] Step 4, then add 0.5g of anhydrous sodium sulfite solid powder to the mixture III to reduce the remaining H 2 o 2 ; adjust the pH value to 6~8, add 3g of sodium lactate, cool and discharge, and o...

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Abstract

The invention discloses a preparation method of biological starch base modified wallpaper gum. The preparation method sequentially comprises the following steps of: mixing corn starch or waxy maize starch with water, heating up to 85-90 DEG C and carrying out heat preservation for 3hours; adding cyclodextrin enzyme for enzymolysis for 3hours under the enzymolysis conditions that the temperature is 60 DEG C and the pH value is 4.5; then, adding the pregelatinized starch, the cyclodextrin enzyme and excessive H2O2 solution, and carrying out complexation and oxidation reaction for 2hours; then, adding a right amount of sodium sulfite for reducing; adjusting the pH value to be 6-8; and adding preservative into the mixture, and cooling to obtain the wallpaper gum. The prepared biological starch base modified wallpaper gum uses the raw materials derived from the nature, and has the advantages of health and environment conservation. The biological enzyme is added for removing the straight-chain part in the starch so as to prevent ageing; and bonding capability is improved by adding hydrophilic groups for complexing the starch, so that the product prepared by the invention is in accordance with the standard of JC / T548-94.

Description

technical field [0001] The invention relates to the technical fields of biological materials and chemical industry, in particular to a preparation method of biological starch-based modified wallpaper glue. Background technique [0002] The wallpaper glues currently produced in the market include: glutinous rice wallpaper glue, mashed potato wallpaper glue and chemical wallpaper glue. Glutinous rice wallpaper glue has a short shelf life and mainly contains amylose, which is easy to age; mashed potato wallpaper also contains more amylose, which is easy to age, and the amylose adhesive ability is poor. The adhesive ability used alone cannot meet the requirements of wallpaper bonding, and it needs to be mixed with chemical glue. Most of the wallpaper reinforcement glues sold in the market are polyvinyl acetal glue or polyvinyl acetate glue. The former has free formaldehyde which is harmful to the human body, while the latter is troublesome to use and the price is high. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/04C09J103/10C09J11/06
Inventor 孙习羽
Owner NINGBO YATE CHEM TECH DEV
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