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A kind of preparation method of polyurethane flame retardant antistatic composite material

A flame-retardant, anti-static, composite material technology is applied in the field of preparation of polyurethane flame-retardant and anti-static composite materials, which can solve the problems of graphene dispersion interface, distance, and combination, and achieves improved compatibility, easy control, and preparation. simple craftsmanship

Active Publication Date: 2022-02-22
SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, polymer / graphene composites are generally prepared by solution, melt mixing, and in-situ polymerization. However, due to the easy aggregation of graphene, so far, the experimental results are still far from theoretical predictions. The key problem to be solved is that graphene Dispersion in polymer matrices and interfacial bonding issues

Method used

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  • A kind of preparation method of polyurethane flame retardant antistatic composite material
  • A kind of preparation method of polyurethane flame retardant antistatic composite material
  • A kind of preparation method of polyurethane flame retardant antistatic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 4kg of graphite oxide and 500kg of water into the ultrasonic irradiation reactor, and ultrasonically disperse for 2 hours under the conditions of ultrasonic power of 300W, frequency of 300Hz, and 40°C to obtain a graphene oxide solution; add 32kg of melamine and 700kg of water into the three-necked bottle , at a temperature of 110°C and a stirring speed of 300rpm, heat and stir for 2 hours to obtain a melamine solution; at a temperature of 110°C, a stirring speed of 300rpm, and a dropping rate of 10mL / min, the prepared graphene oxide solution was added dropwise Added to the melamine solution to obtain a stable melamine-graphene oxide composite suspension.

[0037] The melamine-graphene oxide composite suspension was washed by suction filtration, and dried to constant weight at a vacuum degree of 0.09MPa and a temperature of 100°C to obtain a melamine-graphene oxide composite powder; the composite powder was heat-treated at 200°C for 3 hour, and then under the condit...

Embodiment 2

[0042] Add 5kg of graphite oxide and 600kg of ethanol into an ultrasonic cleaning machine, and the ultrasonic time is 1.5 hours to obtain a graphene oxide solution. Add 20 kg of melamine and 500 kg of water into a three-necked flask, heat and stir for 3 hours at a temperature of 120° C. and a stirring speed of 400 rpm to obtain a melamine solution. Add the obtained graphene oxide solution dropwise to the melamine solution to obtain a melamine-graphene oxide composite suspension, then dry it to constant weight at a vacuum degree of 0.1MPa and a temperature of 230°C to obtain a melamine-graphene oxide composite powder body. Then, the powder was subjected to microwave treatment for 10 minutes under the conditions of microwave power 100KW and microwave frequency 2000MHz to obtain a melamine-reduced graphene oxide composite masterbatch.

[0043] With 600kg castable polyurethane elastomer (abbreviated as CPU), 14kg melamine-reduced graphene oxide composite masterbatch, 2kg zinc oxi...

Embodiment 3

[0045] Add 7kg of graphite oxide and 1000kg of DMF into the ultrasonic cleaning machine, start the ultrasonic cell pulverizer, the ultrasonic power is 1000W, the frequency is 2000Hz, the temperature is 30°C, and the ultrasonic dispersion time is 30 minutes to obtain a graphene oxide solution. Add 30 kg of melamine and 800 kg of water into a three-necked flask, heat and stir for 4 hours at a temperature of 120° C. and a stirring speed of 300 rpm to obtain a melamine solution. The obtained graphene oxide solution was added dropwise to the melamine solution to obtain a melamine-graphene oxide composite suspension, and the product was dried to constant weight at a vacuum degree of 0.05MPa and a temperature of 50°C to obtain a melamine-graphene oxide composite powder body. Then, the powder was subjected to microwave treatment for 20 minutes under the conditions of microwave power 80KW and microwave frequency 1800MHz to obtain a melamine-reduced graphene oxide composite masterbatch....

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Abstract

The invention belongs to the field of composite materials, in particular to a method for preparing a polyurethane flame-retardant and antistatic composite material. The method comprises the steps of 1) preparing a melamine-graphene oxide composite suspension; 2) preparing a melamine-reduced graphene oxide composite masterbatch; and 3) preparing a polyurethane flame-retardant and antistatic composite material. The method reacts graphene oxide and melamine in an aqueous solution, so that graphene oxide is reduced by melamine, and a new antistatic flame retardant is generated in one step. Amino groups are formed on the surface of the reduced graphene, which has good compatibility with melamine. Self-aggregation of graphene is avoided. Due to the existence of reduced graphene, the melamine crystal grains become smaller, and at the same time, graphene can reduce the strong hydrophilicity of melamine, improving the interfacial bonding performance of melamine and polyurethane. In the prepared flame-retardant polyurethane material, the modified graphene is uniformly dispersed, thereby preparing a flame-retardant and antistatic polyurethane material with excellent mechanical properties.

Description

technical field [0001] The invention belongs to the field of composite material preparation, and in particular relates to a preparation method of polyurethane flame-retardant and antistatic composite material. Background technique [0002] Polyurethane (TPU) is known as the "fifth largest plastic", and materials with different physical properties such as density, elasticity, and rigidity can be obtained by simply changing the raw material formula, such as from soft sponge to elastomer, from paint to sealant , from shoe sole size to elastic fiber, etc., so its market and commercial value are very extensive. However, polyurethane (TPU) is a flammable polymer material, and its limiting oxygen index (LOI) is only about 18%, which is far from meeting the requirements for flame retardant use. Use, must meet the relevant flame retardant standards. Therefore, the preparation of polyurethane flame retardant composite materials is of great significance in actual production and life....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L23/08C08K13/02C08K5/3492C08K3/04
CPCC08K13/02C08K5/34922C08K3/042C08L75/04C08K2201/017C08L2201/02C08L2201/04C08L2207/04
Inventor 郑卓李刚夏和生唐印费国霞
Owner SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD