Preparation method of starch type film-forming agent for glass fiber wetting agent

A technology of glass fiber and sizing agent is applied in the field of preparation of chemically modified starch, which can solve the problems that the performance of starch cannot meet the performance requirements of film-forming agent and the high production cost of film-forming agent, and is beneficial to preparation and storage, residues Less effect, low thermal decomposition temperature

Inactive Publication Date: 2013-03-27
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the shortcomings of the high production cost of the film-forming agent of the current domestic glass fiber sizing agent, and the shortcomings of the domestic starch performance that cannot meet the performance requirements of the film-forming agent. Under neutral conditions, pea starch is etherified by expansion inhibitors, catalysts, etherification agents, etc., and a starch-type film-forming agent for glass fiber sizing with excellent performance is prepared.

Method used

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  • Preparation method of starch type film-forming agent for glass fiber wetting agent
  • Preparation method of starch type film-forming agent for glass fiber wetting agent
  • Preparation method of starch type film-forming agent for glass fiber wetting agent

Examples

Experimental program
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Effect test

Embodiment 1

[0032]Put 40 parts by mass of pea starch into a reaction kettle, add 400 parts by mass of distilled water, stir, heat up to 85°C, gelatinize for 1 hour, cool down to 50°C, and adjust the pH to 6 with an alkaline regulator. Add 3 parts by mass of isoamylase, react for 24 hours, pass the solution through an 80-mesh sieve, then heat up to 85°C, react for 15 minutes, cool down to 50°C, add 4 parts by mass of anhydrous sodium sulfate, keep warm for 10 minutes, and then add 0.32 parts by mass of hydrogen Sodium oxide, then quickly add 4 parts by mass of propylene oxide, seal the container, react for 16 hours, after the reaction is completed, cool down to room temperature, filter with suction, and freeze-dry the solid to obtain off-white powdery modified starch—a film-forming agent product.

[0033] Prepare and use the wetting agent according to the prior art: take 40 parts by mass of the film-forming agent product obtained in Example 1, mix it with 800 parts by mass of deionized wate...

Embodiment 2

[0035] Put 40 parts by mass of pea starch into a reaction kettle, add 300 parts by mass of distilled water, stir, heat up to 80°C, gelatinize for 1.5 hours, cool down to 45°C, and adjust the pH value to 5 with an alkaline regulator. Add 2 parts by mass of isoamylase, react for 30 hours, pass the solution through an 80-mesh sieve, then heat up to 90°C, react for 10 minutes, cool down to 40°C, add 3 parts by mass of anhydrous sodium sulfate, keep warm for 10 minutes, and then add 0.48 parts by mass of hydrogen Sodium oxide, then quickly add 4 parts by mass of propylene oxide, seal the container, react for 12 hours, after the reaction is completed, cool down to room temperature, filter with suction, and freeze-dry the solid to obtain off-white powdery modified starch—a film-forming agent product.

[0036] Take 40 parts by mass of the film-forming agent product prepared in Example 2, mix it with 800 parts of deionized water (the mass percentage of the film-forming agent product is ...

Embodiment 3

[0044] A preparation method for a starch-type film-forming agent for glass fiber sizing, comprising the following steps:

[0045] a. Take 40 parts by mass of pea starch and put it into a reaction container, add 400 parts by mass of distilled water or deionized water, stir, heat up to 80°C, after gelatinization reaction for 1.2h, then cool down to 40°C to obtain starch liquid;

[0046] b. Use a pH regulator to adjust the pH value of the starch solution to 5, add 2.5 parts by mass of isoamylase, react for 18 hours, heat up to 80° C. to kill the enzyme for 18 minutes, and prepare a reaction solution;

[0047] c. Cool the reaction solution to 45°C, add 4.5 parts by mass of expansion inhibitor, and keep it warm for 15 minutes; then add 0.4 parts by mass of catalyst, then (quickly) add 7 parts by mass of etherification agent, react for another 17 hours, and adjust the pH with a pH regulator When the value reaches 7, the reaction is completed, and after cooling down to room temperat...

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Abstract

The invention discloses a preparation method of a starch type film-forming agent for a glass fiber wetting agent, which is characterized by comprising the following steps: feeding 40 mass parts of pea starch into a reaction vessel, adding 300-500 mass parts of water, heating to 75-90 DEG C while stirring, carrying out gelation reaction for 0.5-2 hours, and then cooling to 35-50 DEG C; adjusting the pH value to 4-6.5, adding 1-4 mass parts of isoamylase, reacting for 6-30 hours, and then heating to 75-90 DEG C to carry out enzyme inactivation for 5-30 minutes; cooling to 30-55 DEG C, adding 3-6 mass parts of expansion inhibitor, and keeping the temperature for 10-20 minutes; and adding 0.3-0.5 mass part of catalyst and 4-10 mass parts of etherifying agent, reacting for 10-24 hours, adjusting the pH value to 6-8, cooling to room temperature, then carrying out vacuum filtration, and drying the solid to obtain the film-forming agent product. The product is used for a glass fiber wetting agent, and has the characteristics of good film forming performance, convenient post treatment process and the like.

Description

technical field [0001] The invention belongs to a method for preparing chemically modified starch used as a glass fiber surface treatment agent, and relates to a method for preparing a starch-type film-forming agent used as a glass fiber sizing agent. The prepared product is especially suitable for use as a film-forming agent in the glass fiber sizing agent (drawing sizing agent) used as a surface treatment agent in the glass fiber drawing process. Background technique [0002] In the glass fiber drawing process, it is necessary to coat a special surface treatment agent with a multi-phase structure mainly composed of an organic emulsion or solution on the surface of the glass fiber. This kind of coating can not only effectively lubricate and protect the surface of glass fiber, but also integrate hundreds or even thousands of glass fiber monofilaments into a bundle, and can also change the surface state of glass fiber. This not only meets the performance requirements of glas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B33/04C12P19/16C03C25/26
Inventor 霍冀川雷洪陈鹏郭烱雷永林李军程梅
Owner SOUTHWEAT UNIV OF SCI & TECH
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