Preparation method of glass fiber sizing agent

A glass fiber and sizing technology, applied in the field of preparation of glass fiber sizing, can solve the problems of poor quality, non-disclosure, and low quality of sizing, and achieve uniform distribution, good film-forming properties, and good clustering properties

Inactive Publication Date: 2018-11-23
苏州华龙化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic glass fiber sizing agents are better in variety and lower in quality compared with foreign ones.
The key technology of infiltration agent preparation is usually not disclosed, which further leads to the backward quality of infiltration agent in my country

Method used

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  • Preparation method of glass fiber sizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weigh 80g of wheat bran into a 500mL round-bottomed three-neck flask, then add 300mL of deionized water, reflux and stir at 85°C for 2 hours, filter, remove the residue, and dilute the filtrate to 400mL to obtain wheat bran bran extract;

[0022] (2) Heat 400mL of wheat bran extract to 40°C, add 3g of ammonium persulfate to react for 15min, then adjust the pH value of the solution to 7.0 with 1mol / L NaOH, add 15g of acrylic acid, and at the same time add 2g of sodium bisulfite, at 45°C After 3 hours of grafting reaction, adjust the pH value to 6.0 with phosphate buffer, then add 2 g of isoamylase, react for 24 hours, heat at 85°C for 10 minutes, and pass through a 80-mesh sieve to obtain an emulsion;

[0023] (3) Mix isopropyl myristate, mixed surfactant and 0.15mol / L sodium chloride aqueous solution at a volume ratio of 61:25:14, and emulsify with a high-speed emulsifying homogenizer at 13500 r / min for 2 minutes. Then the emulsion is homogenized twice at 30 MPa wi...

Embodiment 2

[0027] (1) Weigh 80g of wheat bran into a 500mL round-bottomed three-neck flask, then add 300mL of deionized water, reflux and stir at 85°C for 2 hours, filter, remove the residue, and dilute the filtrate to 400mL to obtain wheat bran bran extract;

[0028] (2) Heat 400mL of wheat bran extract to 40°C, add 3g of ammonium persulfate to react for 15min, then adjust the pH value of the solution to 7.0 with 1mol / L NaOH, add 15g of acrylic acid, and at the same time add 2g of sodium bisulfite, at 45°C After 3 hours of grafting reaction, adjust the pH value to 6.0 with phosphate buffer, then add 2 g of isoamylase, react for 24 hours, heat at 85°C for 10 minutes, and pass through a 80-mesh sieve to obtain an emulsion;

[0029] (3) Mix isopropyl myristate, mixed surfactant and 0.15mol / L sodium chloride aqueous solution at a volume ratio of 61:25:14, and emulsify with a high-speed emulsifying homogenizer at 13500 r / min for 2 minutes. Then the emulsion is homogenized twice at 30 MPa wi...

Embodiment 3

[0033] (1) Weigh 80g of wheat bran into a 500mL round-bottomed three-neck flask, then add 300mL of deionized water, reflux and stir at 85°C for 2 hours, filter, remove the residue, and dilute the filtrate to 400mL to obtain wheat bran bran extract;

[0034] (2) Heat 400mL of wheat bran extract to 40°C, add 3g of ammonium persulfate to react for 15min, then adjust the pH value of the solution to 7.0 with 1mol / L NaOH, add 15g of acrylic acid, and at the same time add 2g of sodium bisulfite, at 45°C After 3 hours of grafting reaction, adjust the pH value to 6.0 with phosphate buffer, then add 2 g of isoamylase, react for 24 hours, heat at 85°C for 10 minutes, and pass through a 80-mesh sieve to obtain an emulsion;

[0035] (3) Mix isopropyl myristate, mixed surfactant and 0.15mol / L sodium chloride aqueous solution at a volume ratio of 61:25:14, and emulsify with a high-speed emulsifying homogenizer at 13500 r / min for 2 minutes. Then the emulsion is homogenized twice at 30 MPa wi...

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Abstract

The invention provides a preparation method of a glass fiber sizing agent. The method comprises the following preparation steps that 1, deionized water is used for extracting wheat bran to obtain a wheat bran leaching solution; 2, the wheat bran leaching solution is heated and reacted with ammonium persulfate, then the pH value is adjusted to be 7.0, acrylic acid is added, meanwhile, sodium hydrogen sulfite is added for grafting reaction, the pH value is adjusted to be 6.0, and after isoamylase is added for reaction, heating and screening are conducted to obtain emulsion; 3, isopropyl myristate, a mixed surfactant and a sodium chloride aqueous solution are mixed according to a ratio, and emulsification and homogenizing are conducted to obtain oil milk liquid; 4, polyvinyl alcohol, deionized water and fatty acid pentaerythritol ether are evenly mixed to obtain auxiliary mixed liquid; 5, the emulsion in the step 2, the oil milk liquid and the auxiliary mixed liquid are stirred evenly toobtain the sizing agent. The sizing agent is good in film-forming property, good in bundling on glass fiber surfaces and even in distribution, the portions among single fibers are filled with the sizing agent densely, and the sizing agent has very good protection property.

Description

technical field [0001] The invention relates to the technical field of sizing agents, in particular to a method for preparing a glass fiber sizing agent. Background technique [0002] Glass fiber is an inorganic non-metallic material with excellent performance. It has a wide variety and is widely used. Glass fibers can be used as reinforcing materials in composite materials, electrical insulation materials and thermal insulation materials, circuit substrates and other fields of national economy and national defense and military industry. With the increase in the number of textile yarn monofilaments and the continuous improvement of the performance of textile equipment, the performance requirements for sizing agents are also getting higher and higher. The use of sizing agents can increase the strength of glass fibers, bundle monofilaments, lubricate and protect fibers. The surface is not damaged. In the production process of glass fiber, the main factor affecting its perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C25/465C03C25/28
CPCC03C25/24C03C25/28C03C25/465
Inventor 吴建平
Owner 苏州华龙化工有限公司
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