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Surface modifying method of hollow glass beads and flame-retardant application thereof

A hollow glass microsphere and surface modification technology, applied in the field of thermoplastic polyurethane elastomer flame retardant modification, can solve the problems of low flame retardant efficiency, large addition amount, and large heat release amount of thermoplastic polyurethane elastomer, and achieve mechanical properties. The effect of small size, low cost and short modification time

Inactive Publication Date: 2016-10-12
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem in the prior art that hollow glass microspheres are used alone as a flame retardant, the addition amount is large and the effect is not obvious, the present invention provides a method for surface modification of hollow glass microspheres, the modified hollow glass microspheres Beads are used alone as a flame retardant or synergistic ammonium polyphosphate is added to thermoplastic polyurethane elastomers. The present invention overcomes the shortcomings of existing hollow glass microspheres, such as large amount of hollow glass microspheres, low flame retardant efficiency, and large heat release of thermoplastic polyurethane elastomers. , improving the flame retardant properties of thermoplastic polyurethane elastomers

Method used

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  • Surface modifying method of hollow glass beads and flame-retardant application thereof
  • Surface modifying method of hollow glass beads and flame-retardant application thereof
  • Surface modifying method of hollow glass beads and flame-retardant application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0036] Add 99.875% of thermoplastic polyurethane elastomer according to the mass percentage into the internal mixer and banbury for 3 minutes, add 0.125% of the mass percentage of titanium dioxide modified hollow glass microspheres, under room temperature conditions, control the rotating speed to be 10-50r / min, compact Refining for 10 minutes. The resulting material is put into 100×100×3mm 3 In the mould, use a flat vulcanizing machine to press the tablet, control the temperature at 175-180 ° C, hold the pressure for 10-20 minutes, and cool for 1-2 minutes to obtain the product. respectively at 35kW / m 2 , 25kW / m 2 Under the radiant power, the cone calorimeter test and the smoke density test were carried out on the sample, and the peak heat release rate was 734kW / m 2 , the remaining mass is 9%, and the total heat release is 105MJ / m 2 , the total smoke production is 772g, and the smoke factor is 567g / s.

Embodiment 1-2

[0038] Add 99.75% of thermoplastic polyurethane elastomer according to the mass percentage into the internal mixer for banburying for 3 minutes, add 0.25% of the mass percentage of titanium dioxide modified hollow glass microspheres, at room temperature, control the rotating speed to be 10-50r / min, close Refining for 10 minutes. The resulting material is put into 100×100×3mm 3 In the mould, use a flat vulcanizing machine to press the tablet, control the temperature at 175-180 ° C, hold the pressure for 10-20 minutes, and cool for 1-2 minutes to obtain the product. respectively at 35kW / m 2 , 25kW / m 2 Under the radiation power, the cone calorimeter test and the smoke density test were carried out on the sample, and the peak heat release rate was 575kW / m 2 , the remaining mass is 9%, and the total heat release is 104MJ / m 2 , the total smoke production is 755g, and the smoke factor is 441g / s.

Embodiment 1-3

[0040] Add 99.5% of thermoplastic polyurethane elastomer according to the mass percentage into the internal mixer and banbury for 3 minutes, add 0.5% titanium dioxide-modified hollow glass microspheres in the mass percentage, and control the rotating speed at 10-50r / min under room temperature conditions. Refining for 10 minutes. The resulting material is put into 100×100×3mm 3 In the mould, use a flat vulcanizing machine to press the tablet, control the temperature at 175-180 ° C, hold the pressure for 10-20 minutes, and cool for 1-2 minutes to obtain the product. respectively at 35kW / m 2 , 25kW / m 2 Under the radiant power, the cone calorimeter test and the smoke density test were carried out on the sample, and the peak heat release rate was 481kW / m 2 , the remaining mass is 9%, and the total heat release is 93MJ / m 2 , the total smoke production is 711g, and the smoke factor is 342g / s.

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Abstract

The invention relates to a surface modifying method of hollow glass beads and a flame-retardant application thereof. The surface modifying method of the hollow glass beads comprises the following steps: (1) performing ultrasonic washing of the hollow glass beads by using a sodium hydroxide solution; (2) repeatedly washing the hollow glass beads obtained in the step (1) with deionized water and absolute ethyl alcohol respectively, and drying; and (3) dissolving the treated hollow glass beads in a mixed solution of ethanol and deionized water, and performing reflux, heating and stirring; in the heating process, dropwise adding a solution for obtaining a coating, and then adding the sodium hydroxide solution while keeping a neutral environment; and stirring for 5h, performing suction filtration and drying. In the invention, the modified hollow glass beads are adopted as a flame retardant to prepare a flame-retardant thermoplastic polyurethane composite; cone calorimeter experiments indicate that the parameters of the composite such as heat release rate, total heat release, smoke generation rate and smoke factor are remarkably reduced while the residual mass of carbon residues is greatly increased.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant modification of thermoplastic polyurethane elastomers, and in particular relates to a method for surface modification of hollow glass microspheres and the application of the modified hollow glass microspheres in the preparation of flame-retardant thermoplastic polyurethane composite materials. Background technique [0002] Hollow glass microspheres (hollow glass microspheres) are hollow, thin-walled, hard, and lightweight glass spherical shells. It is a new micron-scale lightweight material developed in the 1950s and 1960s. Its main component is borosilicate, which is a unique and stable hollow particle, containing inert gas, and has many physical and chemical properties unmatched by other light fillers. It has the advantages of non-toxicity, high melting point, low thermal conductivity, high strength, high dispersion, good electrical insulation and good thermal stability. Known as the "s...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K9/02C08K7/28C08L75/04C08K3/32C09C1/28C09C3/06C09C3/12
CPCC08K3/32C08K7/28C08K9/02C08K9/10C09C1/28C09C3/006C09C3/06C09C3/12C08K2201/003C08K2003/323C08L2201/02C08L2201/08C08L2207/04C08L75/04
Inventor 陈希磊王洪志焦传梅李少香钱翌
Owner QINGDAO UNIV OF SCI & TECH
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