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Starch bonding agent, and preparation method and use thereof

A starch adhesive and adhesive technology, applied in the directions of starch-derived adhesives, adhesive types, mechanical processing/deformation, etc., can solve the problems of poor viscosity stability, insufficient cohesion, and poor storage stability and other problems, to achieve the effect of good fluidity, low paste viscosity and high wettability

Inactive Publication Date: 2011-02-02
内蒙古奈伦农业科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is superior to the previous three methods, the cohesive force is still not strong enough, the viscosity stability is not good, the storage stability is poor, it is easy to gel, and the tendency to shrink is large.

Method used

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  • Starch bonding agent, and preparation method and use thereof
  • Starch bonding agent, and preparation method and use thereof
  • Starch bonding agent, and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: the preparation of modified starch binder

[0042] 1. Preparation of modified starch

[0043] (1) Preparation of modified starch A

[0044] The sodium sulfate of 2g, 0.2g sodium hydroxide are dissolved in the water of 150g, stir to make it fully dissolve, after fully dissolving, add 100g potato starch, adjust pH value to 11.5 with 4% (w / w) sodium hydroxide solution, Stir to obtain starch milk; then add 0.2g of phosphorus oxychloride to it, add 4% (w / w) sodium hydroxide within 0.5 hours to maintain the pH fluctuation at 11.0-11.5, and time the reaction at room temperature for 3 hours .

[0045] After the reaction, neutralize to pH 6.8 with 10% (w / w) hydrochloric acid solution; wash with soft water three times until the conductance is 1200us / cm, and the moisture content of the finished product is controlled at 17% (w / w)-19% (w / w). Oven-dry at 45°C for 2 hours, crush and pass through a 100-mesh sieve.

[0046] (2) Preparation of modified starch B

[0047...

Embodiment 2

[0055] The preparation of embodiment 2 modified starch binders

[0056] 1. Preparation of modified starch

[0057] (1) Preparation of modified starch A

[0058] The sodium sulfate of 3g, 0.5g sodium hydroxide are dissolved in the water of 120g, stir to make it fully dissolve, after fully dissolving, add 100g potato starch, adjust pH value to 11.6 with 4% (w / w) sodium hydroxide solution, Stir to obtain starch milk; then add 0.23g of phosphorus oxychloride to it, add 4% (w / w) sodium hydroxide within 0.5 hours to maintain the pH fluctuation at 11.2-11.8, and time the reaction at room temperature for 3 hours.

[0059] After the reaction, neutralize to PH 6.5 with 10% (w / w) hydrochloric acid solution; wash with soft water three times, conductance 1500us / cm, oven dry at 45°C for 2 hours, pulverize, and pass through a 100-mesh sieve.

[0060] (2) Preparation of modified starch B

[0061] ① Oxidation:

[0062] Dissolve 100g of potato starch in 100g of water and stir to obtain star...

Embodiment 3

[0069] The preparation of embodiment 3 modified starch binders

[0070] 1. Preparation of modified starch

[0071] (1) Preparation of modified starch A

[0072] Dissolve 2.8g of sodium sulfate and 0.28g of sodium hydroxide in 125g of water, stir to make it fully dissolve, add 100g of tapioca starch after fully dissolving, and adjust the pH value to 11.0 with 4% (w / w) sodium hydroxide solution , stirred to obtain starch milk; then add 0.3g of phosphorus oxychloride, add 4% (w / w) sodium hydroxide within 0.5 hours, to maintain the pH at 11.0-11.5 fluctuations, timed reaction at room temperature for 3 Hour.

[0073] After the reaction, neutralize to pH 7.0 with 10% (w / w) hydrochloric acid solution; wash with soft water three times to conductance 1600us / cm, dry in an oven at 45°C for 2 hours, pulverize, and pass through a 100-mesh sieve.

[0074] (2) Preparation of modified starch B

[0075] ① Oxidation:

[0076] Dissolve 100g of tapioca starch in 150g of water and stir to obt...

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PUM

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Abstract

The invention provides a preparation method for a starch bonding agent, which comprises the following steps of: performing crosslinking treatment on starch by adopting a crosslinker to form modified starch A, performing oxidation with sodium hypochlorite, esterification with butanedioic anhydride and treatment with a cationic etherifying agent on the starch to form modified starch B, and mixing the modified starch A and the modified starch B according to a certain proportion to form the modified starch bonding agent. The preparation method has the advantage of ensuring higher bonding power, firm bonding, high hardness of bonded paper products, high drying speed, low viscosity of paste, high flowability and wettability, convenience of coating, high storage stability and difficulty in gel production.

Description

technical field [0001] The present application relates to the technical field of chemical adhesives, in particular to a modified starch adhesive and its preparation method and application. Background of the invention [0002] Corrugated paper is usually made by bonding cardboard to corrugated corrugated base paper with an adhesive. It is mainly used for packaging products such as cartons, single and multi-layer paper bags, etc. Packaging products made of corrugated paper use The cushioning properties of corrugated paper protect the items stored in the packaging from damage. [0003] For the adhesive of corrugated paper, in the early days, most of them used natron for a long time, and its conjunctiva is fast and the price is low. However, the cartons bonded with natron are easy to absorb moisture and efflorescence, which will damage the pressure resistance of the box surface, and the phenomenon of degumming sometimes occurs. occur, and even corrode the inner packaged goods. ...

Claims

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Application Information

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IPC IPC(8): C09J103/04C09J103/06C09J103/08C09J103/10B31F1/20
Inventor 秦艳芳王瑞英周庆锋
Owner 内蒙古奈伦农业科技股份有限公司
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