A method for preparing an esterified starch film former for glass fiber wetting

A technology of esterified starch and glass fiber, which is applied in the field of preparation of esterified starch film-forming agent for glass fiber infiltration, can solve the problems of difficult to meet the production technology, no self-emulsifying film-forming agent, etc., to overcome the difficulty of hot cleaning, Viscosity reduction and cost reduction effects

Active Publication Date: 2013-08-07
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Throughout the development of sizing agents in the glass fiber industry at home and abroad, all kinds of starch-type sizing film-forming agents are in the form of emulsifying agents, and there is no film-forming agent with self-emulsifying properties, which is difficult to meet the needs of production technology

Method used

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  • A method for preparing an esterified starch film former for glass fiber wetting
  • A method for preparing an esterified starch film former for glass fiber wetting
  • A method for preparing an esterified starch film former for glass fiber wetting

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Put 40 parts by mass of cornstarch into the reactor, add 400 parts by mass of distilled water, stir, heat up to 75°C, gelatinize for 2 hours, cool down to 45°C, and adjust the pH value to 5 with acidic and alkaline regulators. Add 4 parts by mass of isoamylase, react for 1.5h, and pass the solution through an 80-mesh sieve. Then raise the temperature to 85°C, react for 15 minutes, cool down to 35°C, slowly add sodium carbonate and 2 parts by mass of octenyl succinic anhydride alternately, and keep the reaction pH of the system at 8.0. After the dropwise addition was completed, the reaction was sealed for 4 hours. After the reaction was completed, the pH of the system was adjusted to 6.8 with 2% hydrochloric acid solution. Cool down to room temperature, suction filter, and freeze-dry the solid to obtain off-white powdery modified starch product.

Embodiment 2

[0029] Put 40 parts by mass of cornstarch into the reaction kettle, add 320 parts by mass of distilled water, stir, heat up to 80°C, gelatinize for 1 hour, cool down to 50°C, and adjust the pH value to 6 with sodium dihydrogen phosphate acid regulator. Add 3 parts by mass of isoamylase, react for 2 hours, and pass the solution through an 80-mesh sieve. Then raise the temperature to 90°C, react for 10 minutes, cool down to 40°C, add an appropriate amount of sodium hydroxide to make the pH value 10, slowly add 1.6 parts by mass of octenyl succinic anhydride to keep the reaction pH of the system at 7.5, and then dropwise add hydroxide Sodium, keep the pH of the reaction at 7.5, and the dropwise addition time is 2 hours. After the dropwise addition, the reaction was carried out for 5h. After the reaction was completed, it was neutralized to pH 7.0 with 3% hydrochloric acid solution. The system was lowered to room temperature, suction filtered, and freeze-dried to obtain off-whit...

Embodiment 3

[0031] Put 40 parts of corn starch into the reaction kettle, add 360 parts by mass of distilled water, stir, heat up to 85°C, gelatinize for 1 hour, cool down to 48°C, and adjust the pH value to 5.5 with dilute hydrochloric acid solution. Add 4 parts by mass of isoamylase, fully react for 1 hour, and pass the solution through an 80-mesh sieve. The filtrate was heated up to 90°C, reacted for 10min, cooled to 35°C, added dropwise 0.25mol / L potassium hydroxide solution to raise the pH value to 8.5, stopped the dropwise addition, and then slowly added 1.2 parts by mass of octenyl succinic anhydride dropwise, keeping The reaction pH of the system is 8.0, and potassium hydroxide and acid anhydride are slowly added dropwise in sequence to maintain the pH of the reaction system at 8-8.5. Dropping time was controlled at 1.5 hours. After the dropwise addition, the reaction was carried out for 3.5h. Then neutralize the solution with 2.5% hydrochloric acid solution to pH 6.8. The syste...

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Abstract

The present invention discloses a method for preparing an esterified starch film former for glass fiber wetting, and the method is characterized in that the product of the esterified starch film former for glass fiber wetting is obtained by: placing corn starch into a reactor, adding water, heating to a temperature of 70-90 DEG C under stirring, reacting for 0.5- 2h, and cooling to 30-60 DEG C; adjusting a pH value to 4-7, adding isoamylase, after reacting for 0.5-6h, heating to a temperature of 80-90 DEG C for 20 min for enzyme deactivation, and filtering to remove the enzyme and obtain a reaction solution; and cooling the reaction solution to a temperature of 25-55 DEG C, adding an acid anhydride, adding an alkaline catalyst, maintaining the pH value being 7-10, reacting for 2-10h, adjusting the pH value to be 6-7, cooling to the room temperature, suction filtering, and drying a solid. The product of the film former has the advantages of a good film forming property and an easy post-treatment process, and has excellent effects of bundling and protecting the glass fiber in the production process of the glass fiber.

Description

technical field [0001] The invention belongs to the preparation of a film-forming agent in a glass fiber surface treatment agent, and relates to a preparation method of an esterified starch film-forming agent for glass fiber impregnation. The esterified starch film-forming agent for impregnating glass fibers prepared by the invention is particularly suitable for the production and drawing of textile glass fibers. Background technique [0002] Wetting agent is a special surface treatment agent with multi-phase structure mainly composed of organic emulsion or solution. In the process of glass fiber drawing and post-processing, it can effectively lubricate and protect the surface of glass fiber, and can integrate hundreds or even thousands of glass fiber monofilaments into a bundle, and can also change the surface state of glass fiber. It not only meets the performance requirements of glass fiber precursors in subsequent processing procedures, but also promotes the combination...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/04C03C25/26C08K9/04C08K7/14
Inventor 霍冀川夏利英雷洪郭烱雷永林李军陈鹏
Owner SOUTHWEAT UNIV OF SCI & TECH
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