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A kind of modified starch for environmentally friendly wallpaper rubber powder and preparation method thereof

An environmentally friendly, starch technology, applied in the field of modified starch, can solve the problems of wallpaper glue's frost resistance, unsatisfactory cohesion, inability to industrialize application, complicated and complicated methods, etc., and achieves strong cohesion, low cost, and viscosity. high degree of effect

Active Publication Date: 2018-01-19
HENAN HENGRUI STARCH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic research on the production process of modified starch for wallpaper glue is mostly biased towards the reaction mechanism and theory of starch. Most of them use edible starch as the main raw material. The methods used are very cumbersome and complicated. A starch is synthesized in multiple steps, and most of them are produced by wet methods. process, resulting in a large amount of industrial wastewater, or using high temperature, organic alcohol and other conditions, it is easy to cause environmental pollution, starch gelatinization, and the product recovery rate is below 80%. The practical application feasibility is poor and industrial application is impossible.
Moreover, the modified starch prepared by the current production method of modified starch for wallpaper glue needs high temperature and long-term heating and gelatinization in the process of preparing wallpaper glue. and other aspects can not meet the needs of the current market

Method used

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  • A kind of modified starch for environmentally friendly wallpaper rubber powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An environmentally friendly modified starch for wallpaper rubber powder is prepared by the following method, and the specific operation steps are:

[0030] 1) Pour 100 parts of potato starch into a temperature-controllable kneader; take 0.5 parts of epichlorohydrin and 25 parts of chloroacetic acid and add them to 40 parts of ethanol solution with a mass concentration of 86%, stir and mix evenly to obtain a mixed solution ;

[0031] 2) adding the mixed solution prepared in step 1) into the kneader filled with potato starch in step 1), and stirring continuously, mixing evenly to obtain a mixed material;

[0032] 3) Heat the mixed material prepared in step 2) to 40°C, slowly add 30 parts of sodium hydroxide solution with a mass concentration of 20% to the heated mixed material in the form of mist dispersion, and adjust the pH of the mixed material to 11.20 , after the sodium hydroxide solution is added, the reaction material 1 is obtained;

[0033] 4) Add 0.3 parts of a...

Embodiment 2

[0037] An environmentally friendly modified starch for wallpaper rubber powder is prepared by the following method, and the specific operation steps are:

[0038] 1) Pour 100 parts of glutinous rice starch into a temperature-controllable kneader; take 0.8 parts of phosphorus oxychloride and 20 parts of sodium chloroacetate and add them to 35 parts of ethanol solution with a mass concentration of 85%, stir and mix evenly to obtain a mixture solution;

[0039] 2) adding the mixed solution prepared in step 1) into the kneader filled with glutinous rice starch in step 1), and constantly stirring, mixing evenly to obtain a mixed material;

[0040] 3) Heat the mixed material prepared in step 2) to 45°C, slowly add 25 parts of sodium hydroxide solution with a mass concentration of 22% to the heated mixed material in the form of mist dispersion, and adjust the pH value of the mixed material is 11.10, after the sodium hydroxide solution is added, the reaction material 1 is obtained; ...

Embodiment 3

[0045] An environmentally friendly modified starch for wallpaper rubber powder is prepared by the following method, and the specific operation steps are:

[0046] 1) Pour 100 parts of cornstarch into a temperature-controllable kneader; take 1 part of sodium trimetaphosphate and 30 parts of chloroacetic acid and add them to 45 parts of ethanol solution with a mass concentration of 90%, stir and mix evenly to obtain a mixed solution ;

[0047] 2) adding the mixed solution prepared in step 1) into the kneader filled with cornstarch in step 1), and stirring continuously, mixing evenly to obtain a mixed material;

[0048] 3) Heat the mixed material prepared in step 2) to 50°C, slowly add 35 parts of sodium hydroxide solution with a mass concentration of 25% to the heated mixed material in the form of mist dispersion, and adjust the pH value of the mixed material is 11.35, after the sodium hydroxide solution is added, the reaction material 1 is obtained;

[0049]4) Add 0.5 parts o...

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Abstract

The invention relates to the technical field of modified starch, and specifically discloses an environment-friendly modified starch for wallpaper rubber powder and a preparation method thereof. The modified starch is prepared by the following method: adding a crosslinking agent and an etherifying agent into an ethanol solution with a mass concentration of 90%, and mixing uniformly to obtain a mixed solution; then adding the mixed solution to the starch, and mixing uniformly to obtain Mixed material; heating the mixed material to 40-50°C, and then adding a pH regulator to the heated mixed material to obtain a reaction material 1; adding a catalyst and an oxidant to the reaction material 1, and stirring to complete the reaction to obtain a reaction material 2. After the reaction material 2 is dried and gelatinized, the modified starch is obtained. The modified starch dissolves quickly in cold water, has high viscosity, good frost resistance and strong cohesive force. The preparation method adopted does not generate industrial waste water, has high yield, short production cycle and low production cost.

Description

technical field [0001] The invention relates to the technical field of modified starch, in particular to an environment-friendly modified starch for wallpaper rubber powder and a preparation method thereof. Background technique [0002] At present, there are two main types of wallpaper glue used in the domestic market. One is semi-solid gelatinous form, usually glutinous rice glue, mostly packed in plastic bags; the other is wallpaper glue powder, which is mainly white or light yellow. In the state of snowflakes, when in use, add cold or warm water to form a consistency for pasting wallpaper. The two types of products have their own characteristics. They are mainly used to paste wallpapers and wall coverings. They are a kind of adhesive commonly used in the building materials and decoration industry. Pasting wallpapers and ensuring the service life of wallpapers are the most basic functions. Common wallpaper glues mostly use chemical substances as the main raw materials, wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B30/18C08B31/18C08B31/00C08B31/08C09J103/10
CPCC08B30/18C08B31/003C08B31/08C08B31/185C09J103/10
Inventor 吴磊朱津津王真真吴宗帅张淑芬褚冰陈冠杰张永胡荣柳
Owner HENAN HENGRUI STARCH TECH CO LTD