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Preparation method of basalt fiber impregnating compound with waterborne polyurethane as film-forming agent

A water-based polyurethane and basalt fiber technology, applied in the fields of fine chemical industry and basalt fiber, can solve the problems of low viscosity and dispersibility of sizing agent, hydrolysis resistance and lack of verification of fiber mechanical properties, etc. The effect of improving fiber breaking strength

Pending Publication Date: 2021-12-31
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Yang Chuncai (CN201810294887.8) disclosed and invented a self-assembled emulsified water-based polyurethane sizing using water-based polyurethane as a film-forming agent. The sizing has low viscosity, good dispersibility, and good stability, but its hydrolysis resistance and fiber mechanical properties not verified

Method used

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  • Preparation method of basalt fiber impregnating compound with waterborne polyurethane as film-forming agent
  • Preparation method of basalt fiber impregnating compound with waterborne polyurethane as film-forming agent
  • Preparation method of basalt fiber impregnating compound with waterborne polyurethane as film-forming agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]Add 42.5g of polypropylene glycol, 21.5g of polyethylene glycol, 39.5g of polytetrahydrofuran, 10.3g of ethylene glycol, and 5g of methylpyrrolidone into the flask, heat up to 90-100°C and vacuum dry for 2-3 hours. Inject dry N2 and lower the temperature to 70-75°C. Weigh 42.4g of isophorone diisocyanate, drop it into the flask within 30min, control the temperature of the flask at 70-75°C and stir slowly; take a sample to test that the isocyanate content reaches the theoretical value, and obtain a polyurethane prepolymer. Add appropriate amount of acetone to adjust the viscosity of the system. Cool down to 45°C, add 3.8g of hydrophilic chain extender N-methyldiethanolamine, stir for 30-40min, add 3.8g of acetic acid and stir for 30-40min; transfer the polyurethane prepolymer into the shear emulsification tank, increase the shear stirring Speed, add an appropriate amount of deionized water to the polyurethane prepolymer within 8 to 12 minutes; when the system appears a c...

Embodiment 2

[0044] Add 55.4g of polypropylene glycol, 35.6g of polyethylene glycol, 43.5g of polytetrahydrofuran, 11g of ethylene glycol, and 5g of methylpyrrolidone into the flask, heat up to 90-100°C and vacuum-dry for 2-3 hours. Dry N2, lower the temperature to 70-75°C. Weigh 48.7g of isophorone diisocyanate, drop it into the flask within 30min, control the temperature of the flask at 70-75°C and stir slowly; take a sample to test that the isocyanate content reaches the theoretical value, and obtain a polyurethane prepolymer. Add appropriate amount of acetone to adjust the viscosity of the system. Cool down to 45°C, add 7.9g of hydrophilic chain extender N-methyldiethanolamine, stir for 30-40min, add 7.9g of acetic acid and stir for 30-40min; transfer the polyurethane prepolymer into the shear emulsification tank, increase the shear stirring Speed, add an appropriate amount of deionized water to the polyurethane prepolymer within 8 to 12 minutes; when the system appears a conversion p...

Embodiment 3

[0046] Add 35.7g of polypropylene glycol, 46.8g of polyethylene glycol, 40.4g of polytetrahydrofuran, 9.5g of ethylene glycol, and 5g of methylpyrrolidone into the flask, heat up to 90-100°C and vacuum dry for 2-3 hours. Inject dry N2 and lower the temperature to 70-75°C. Weigh 55.6g of isophorone diisocyanate, drop it into the flask within 30min, control the temperature of the flask at 70-75°C and stir slowly; take a sample to test that the isocyanate content reaches the theoretical value, and obtain a polyurethane prepolymer. Add appropriate amount of acetone to adjust the viscosity of the system. Cool down to 45°C, add 12.8g of hydrophilic chain extender N-methyldiethanolamine, stir for 30-40min, add 12.8g of acetic acid and stir for 30-40min; transfer the polyurethane prepolymer into the shear emulsification tank, increase the shear stirring Speed, add an appropriate amount of deionized water to the polyurethane prepolymer within 8 to 12 minutes; when the system appears a...

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Abstract

The invention relates to a preparation method of a basalt fiber impregnating compound with waterborne polyurethane as a film-forming agent. The basalt fiber impregnating compound comprises 2-4% of a polyether type waterborne polyurethane film-forming agent; 0.5-1% of a lubricant; 0.4-0.8% of a coupling agent; and 0.03-0.06% of a surfactant; wherein the waterborne polyurethane which can be applied to the basalt fiber impregnating compound is synthesized by taking isocyanate and polyether glycol as main raw materials and taking micromolecular amine as a chain extender. Compared with bare fibers, the waterborne polyurethane modified basalt fiber has the advantages that active functional groups on the surface of the fiber are increased, so that the compounding performance of the fiber and other substances is improved, and the mechanical property and the bundling property are enhanced. Therefore, the basalt fiber impregnating compound taking the waterborne polyurethane as the film-forming agent is better in emulsion water resistance and better in emulsion impregnating effect, not only is the cohesiveness of fibers and the impregnating compound improved, but also the surface defects of the fibers can be improved. Thus, an excellent selective impregnating compound is provided for basalt fiber production, and the application of the basalt fibers is expanded.

Description

technical field [0001] The invention relates to the technical fields of fine chemical industry and basalt fiber, in particular to the preparation of a basalt fiber wetting agent using water-based polyurethane as a film-forming agent. Background technique [0002] Basalt fiber (Continuous basalt fiber) is a new type of inorganic fiber, which is drawn from natural basalt through a platinum-rhodium alloy bushing plate after melting at 1500°C to 1600°C. It not only has high chemical stability and thermal stability, but also has excellent mechanical properties, water resistance, corrosion resistance, and no pollution due to its unique composition and fiber structure of basalt raw stone. Inorganic green high-performance fiber materials can be used in many fields such as shipbuilding, aerospace, and heat insulation. It is widely distributed in our country and has abundant reserves, so it has received extensive attention from the industry. However, its surface is relatively smooth...

Claims

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Application Information

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IPC IPC(8): C03C25/465C03C25/40
CPCC03C25/465C03C25/326
Inventor 苗世顶左传潇李静瑶司集文
Owner JILIN UNIV