Preparation method of high-stability starch adhesive

A starch adhesive, high stability technology, applied in the direction of starch adhesives, adhesive additives, polymer adhesive additives, etc., can solve the problems that the stability cannot meet the demand, the toughness is poor and easy to break, etc. Good moisturizing effect, fast drying, no irritating smell effect

Inactive Publication Date: 2018-06-08
明光市永德包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corn starch is a pure natural raw material with a wide source and low price. Starch adhesives are widely used in textiles, papermaking, packaging cartons, corrugated cardboard, wood, etc. The adhesives made of corn starch are non-corrosive and have high bonding strength. , no pollution, low cost and other advantages, but poor toughness and easy to break, and the stability can not meet the demand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A method for preparing a high-stability starch adhesive, comprising the following steps: mixing 60kg of cornstarch and 160kg of water, raising the temperature to 70°C and stirring for 20 minutes, adding 2kg of borax and 0.5kg of copper sulfate and continuing to stir for 2 hours, and then adding 9kg of bentonite for compounding Mix the mixture evenly, adjust the pH value of the system to 10.2-10.8 with a concentration of 0.6mol / L sodium hydroxide solution, add 4kg of phthalic anhydride and stir for 10min, add 4kg of sodium dehydroacetate and mix evenly, gelatinize, and the gelatinization temperature is 80°C to obtain a high-stability starch adhesive.

[0015] The bentonite compound is prepared by the following process: mix 12kg bentonite and 25kg disproportionated rosin evenly, add 4kg bisphenol A and stir evenly under stirring, add 0.2kg triethylamine, heat up to 180°C and stir for 20min, cool to 105°C, add 8kg of phenol was stirred for 35min to obtain a bentonite compo...

Embodiment 2

[0017] A method for preparing a high-stability starch adhesive, comprising the following steps: mixing 80kg of cornstarch and 100kg of water, raising the temperature to 80°C and stirring for 10 minutes, adding 4kg of borax and 0.3kg of copper sulfate and continuing to stir for 3 hours, and then adding 5kg of bentonite for compounding Mix the mixture evenly, adjust the pH value of the system to 10.2-10.8 with a concentration of 1mol / L sodium hydroxide solution, add 2kg of phthalic anhydride and stir for 20min, add 2kg of sodium dehydroacetate and mix evenly, gelatinize, and the gelatinization temperature is 90 °C, high stability starch adhesive was obtained.

[0018] The bentonite compound is prepared by the following process: mix 6kg bentonite and 35kg disproportionated rosin evenly, add 2kg bisphenol A and stir evenly under stirring, add 0.4kg triethylamine, heat up to 160°C and stir for 40min, cool to 95°C, add 16kg of phenol was stirred for 25 minutes to obtain a bentonite ...

Embodiment 3

[0020] A method for preparing a high-stability starch adhesive, comprising the following steps: mixing 65kg of cornstarch and 140kg of water, raising the temperature to 73°C and stirring for 18 minutes, adding 2.5kg of borax and 0.45kg of copper sulfate to continue stirring for 2.2 hours, and then adding 8kg of Mix the bentonite compound evenly, adjust the pH value of the system to 10.2-10.8 with a 0.7mol / L sodium hydroxide solution, add 3.5kg of phthalic anhydride and stir for 12 minutes, add 3.5kg of sodium dehydroacetate, mix evenly, and gelatinize. The gelatinization temperature was 82°C, and a high-stability starch adhesive was obtained.

[0021] The bentonite compound is prepared by the following process: mix 10kg of bentonite and 28kg of disproportionated rosin, add 3.5kg of bisphenol A and stir evenly under stirring, add 0.25kg of triethylamine, heat up to 166°C and stir for 25min, cool to 102°C, Add 10kg of phenol and stir for 32min to obtain bentonite composite.

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Abstract

The invention discloses a preparation method of a high-stability starch adhesive. The preparation method comprises the following steps of mixing corn starch and water, heating and stirring; adding borax and copper sulfate, and continuing to stir; adding a bentonite complex, and uniformly mixing; adjusting the pH (potential of hydrogen) value of the system to 10.2 to 10.8; adding phthalic anhydride, and stirring; adding sodium dehydroacetate, uniformly mixing, and gelatinizing, so as to obtain the high-stability starch adhesive. The bentonite complex is prepared by the following technology of uniformly mixing bentonite and disproportionated rosin, adding biphenol A to uniformly stir under the stirring state, adding triethylamine, heating and stirring, cooling, and adding phenol to stir, soas to obtain the bentonite complex. The preparation method has the advantages that the safe and environment-friendly effects are realized; the production raw materials are simple and are easy to obtain; the preparation technology is simple. The prepared starch adhesive has the advantages of good toughness, good stability, strong adhering property, quick drying, and no pollution.

Description

technical field [0001] The invention relates to the technical field of starch adhesives, in particular to a preparation method of a high-stability starch adhesive. Background technique [0002] With the emphasis on environmental protection, the development of non-polluting and non-toxic construction adhesives has become a development trend. Corn starch is a pure natural raw material with a wide source and low price. Starch adhesives are widely used in textiles, papermaking, packaging cartons, corrugated cardboard, wood, etc. The adhesives made of corn starch are non-corrosive and have high bonding strength. , no pollution, low cost and other advantages, but the toughness is poor and easy to break, and the stability cannot meet the demand. Contents of the invention [0003] Based on the technical problems existing in the background technology, the present invention proposes a preparation method of a high-stability starch adhesive, which is safe and environmentally friendly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/02C09J11/04C09J11/06C09J11/08
CPCC09J103/02C08K2003/3045C08K2003/387C09J11/04C09J11/06C09J11/08C08L93/04C08K13/06C08K9/04C08K3/346C08K3/38C08K3/30C08K5/12
Inventor 张波
Owner 明光市永德包装有限公司
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