Environment-friendly modified starch for wallpaper adhesive and method for preparing environment-friendly modified starch

A technology of modified starch and wallpaper glue, applied in the chemical field, can solve the problems of unsuitable industrial application, poor feasibility, environmental pollution, etc., and achieve the effect of good freeze-thaw effect, simple preparation, and wide range of sources

Inactive Publication Date: 2018-05-29
山东福洋生物科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is easy to cause environmental pollution, starch gelatinization, and the product recovery rate is below 50%. The practical application feasibility is poor and industrial application is impossible

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1.1 Put 1500kg dry weight of starch into the reactor, including 450kg waxy starch (accounting for 30% of starch dry weight), 1005kg tapioca starch (accounting for 67% of starch dry weight), wheat starch (accounting for 3% of starch dry weight) %) 45 kg, add water to adjust to the starch emulsion of 38wt% concentration;

[0043] 1.2 Add 150 kg of sodium chloride to the uniformly stirred starch milk solution, accounting for 10% of the total dry weight of starch;

[0044] 1.3 Slowly adjust the pH value of starch milk to 11.05 with a 3wt% concentration of edible alkali solution, and the consumption of edible alkali accounts for 0.85% of the total dry weight of starch;

[0045] 1.4 Cool down to 19°C, slowly add 180kg of propylene oxide, accounting for 12% of the total dry weight of starch, and keep for 2h;

[0046] 1.5 Raise the temperature of the water bath to 45°C and continue the reaction;

[0047] 1.6 After 24 hours of reaction, the reaction is completed, and the pH is...

Embodiment 2

[0051] 2.1 Put 1450kg dry weight of starch into the reactor, including waxy starch (accounting for 32% of starch dry weight) 464kg, cassava starch (accounting for 64% of starch dry weight) 928kg, wheat starch (accounting for 4% of starch dry weight) %) 58 kg, add water to adjust to the starch emulsion of 36wt% concentration;

[0052]2.2 Add 130.5 kg of sodium chloride to the uniformly stirred starch milk solution, accounting for 9% of the total dry weight of starch;

[0053] 2.3 Slowly adjust the pH value of starch milk to 11.22 with a 7wt% concentration of edible alkali solution, and the consumption of edible alkali accounts for 0.92% of the total dry weight of starch;

[0054] 2.4 Cool down to 20°C, slowly add 174kg of propylene oxide, accounting for 12% of the total dry weight of starch, and keep for 2h;

[0055] 2.5 Raise the temperature of the water bath to 47°C and continue the reaction;

[0056] 2.6 After reacting for 24 hours, adjust the pH value to 10.5 with 10% hyd...

Embodiment 3

[0065] 3.1 Put 1400 kg dry weight of starch into the reactor, including 1386 kg of tapioca starch (99% of the dry weight of the starch), 14 kg of wheat starch (1% of the dry weight of the starch), and add water to form a starch emulsion with a concentration of 40wt%. ;

[0066] 3.2 Add 112 kg of sodium chloride to the uniformly stirred starch milk solution, accounting for 8% of the total dry weight of starch;

[0067] 3.3 Slowly adjust the pH value of starch milk to 11.34 with a 4wt% concentration of edible alkali solution, and the consumption of edible alkali accounts for 0.94% of the total dry weight of starch;

[0068] 3.4 Cool down to 20°C, slowly add 126kg of propylene oxide, accounting for 9% of the total dry weight of starch, and keep for 2h;

[0069] 3.5 Raise the temperature of the water bath to 46°C and continue the reaction;

[0070] 3.6 After reacting for 24 hours, adjust the pH value to 10.3 with 10% hydrochloric acid solution, add 2.1 kg of sodium trimetaphosph...

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Abstract

The invention provides environment-friendly modified starch for wallpaper adhesive and a method for preparing the environment-friendly modified starch. The environment-friendly modified starch for thewallpaper adhesive mainly comprises starch raw materials and addition raw materials. The starch raw materials mainly include waxy starch, cassava starch and wheat starch, and the addition raw materials mainly include expansion inhibitors, etherifying agents and cross-linking agents. The method includes preparing the modified starch for the wallpaper adhesive with different degrees of viscosity from starch by means of etherifying and cross-linking. The environment-friendly modified starch and the method have the advantages that paste liquid of the environment-friendly modified starch is high in viscosity, good freeze-thaw property effects can be realized, and the environment-friendly modified starch is high in adhesive property; the environment-friendly modified starch is environmentally friendly and is free of harmful substances or peculiar smell; processes and equipment for producing the environment-friendly modified starch are simple and are low in production cost.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to an environment-friendly modified starch for wallpaper glue and a preparation method thereof. Background technique [0002] Wallpaper glue is mainly used to paste wallpaper and wall covering. It is an adhesive commonly used in the building materials and decoration industry. It is the most basic function to stick to wallpaper and ensure the service life of wallpaper. Common wallpaper glues mostly use starch glue powder combined with polymer glue as the main raw material. Due to the high pH and high salt content of starch glue powder, it is easy to cause adverse effects such as discoloration on wallpaper. The high content of formaldehyde and benzene in polymer glue is harmful to human health. Harmful, especially today as consumers pay more and more attention to and pursue health, safety and environmental protection performance, the market of chemical adhesives is facing a major test, and th...

Claims

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Application Information

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IPC IPC(8): C08B31/12C08B31/00C09J103/08C09J103/04
Inventor 赵伟崔巍巍刘民刘东李红利
Owner 山东福洋生物科技股份有限公司
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