Nano composite expansion flame-retardant polyurethane foam plastic and preparation thereof

A foam, expansion flame-retardant technology, applied in the field of flame-retardant polyurethane foam, can solve the problems of poor physical properties, large amounts of inorganic flame retardants added to the human body and the environment, etc., to reduce physical properties, reduce heat release rate and total The effect of heat release and overcoming low flame retardant efficiency

Inactive Publication Date: 2009-08-12
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a nano-composite intumescent flame-retardant polyurethane foam and its preparation method, to improve the flame-retardant performance of polyurethane foam, and to overcome the harmful effects of a large amount of smoke and toxic and corrosive gases produced when halogen-containing flame retardants are burned. The disadvantages of causing great harm to the human body and the environment and poor physical properties due to the large amount of inorganic flame retardants added

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1 kg of polyethylene glycol with a hydroxyl value of 400 mgKOH / g, 0.15 kg of expandable graphite with a particle size of 100 meshes, 0.06 kg of industrial grade DMMP (dimethyl methyl phosphonate), 0.015 kg of organically modified zirconium phosphate, and purified water 0.02 kg, 0.03 kg of polydimethylsiloxane, 0.015 kg of triethylenediamine and 0.015 kg of dibutyltin dilaurate are mixed, stirred at 1000 rpm for 1 second, and then mixed with 1 kg of isocyanate content (NCO%) is 31wt% thick MDI (diphenylmethane diisocyanate) after mixing, stirs 20 seconds with 1000 rev / min rotating speeds in a large container at 25 ℃, then pours into the mold quickly, after 5 minutes It can be cured and molded, and the obtained product is nanocomposite expanded flame-retardant rigid polyurethane foam.

[0018] The above-mentioned nanocomposite intumescent flame-retardant rigid polyurethane foam can reach the UL-94V-0 level in the vertical burning test, its limit sample index value reaches...

Embodiment 2

[0030] 1 kg of polyethylene glycol with a hydroxyl value of 400 mgKOH / g, 0.141 kg of expandable graphite with a particle size of 100 mesh, 0.0565 kg of industrial grade DMMP, 0.0275 kg of organically modified zirconium phosphate, 0.02 kg of purified water, polydimethylsiloxane After 0.03 kilogram of oxane, 0.015 kilogram of triethylenediamine and 0.015 kilogram of dibutyltin dilaurate were mixed, after stirring for 1 second at a speed of 1000 rpm, it was mixed with 1 kilogram of isocyanate content (NCO%) of 31wt% crude After mixing MDI, stir it in a large container at 1000 rpm for 20 seconds at 25°C, then quickly pour it into the mold, and it can be solidified and formed after 5 minutes. The obtained product is nanocomposite expanded flame-retardant rigid polyurethane foam. plastic.

[0031] This nanocomposite expanded flame retardant rigid polyurethane foam can pass the UL-94V-0 test, the oxygen index is 34, and its maximum heat release rate is 211.8w / g, which is 39.1% lower ...

Embodiment 3

[0038] 1 kg of polyethylene glycol with a hydroxyl value of 400 mgKOH / g, 0.159 kg of expandable graphite with a particle size of 100 mesh, 0.0635 kg of industrial grade DMMP, 0.0025 kg of organically modified zirconium phosphate, 0.02 kg of purified water, polydimethylsiloxane After mixing 0.03 kg of alkane, 0.015 kg of triethylenediamine and 0.015 kg of dibutyltin dilaurate, after stirring for 1 second at a speed of 1000 rpm, it was mixed with 1 kg of isocyanate content (NCO%) of 31 wt% crude After mixing MDI, stir it in a large container at 1000 rpm for 20 seconds at 25°C, then quickly pour it into the mold, and it can be solidified and formed after 5 minutes. The obtained product is nanocomposite expanded flame-retardant rigid polyurethane foam. plastic.

[0039] This nanocomposite expanded flame retardant rigid polyurethane foam can pass the UL-94V-0 test, the oxygen index is 36, and its maximum heat release rate is 205.1w / g, which is 41.1% lower than that of pure rigid po...

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Abstract

The invention discloses a nano composite expansion flame retardant polyurethane foamed plastic and a preparation method thereof. The nano composite expansion flame retardant polyurethane foamed plastic is characterized in that the preparation method comprises the following steps: evenly mixing 40 to 80 percent of polyol, 0.1 to 3 percent of foaming agent, 0.1 to 2 percent of foam stabilizer, 0.1 to 2 percent of catalyst, 0.5 to 4 percent of expandable graphite, 0.5 to 9 percent of halogen free phosphate ester or phosphonate ester and 0.5 to 5.5 percent of organic modified nano inorganic filler by weight percentage; and then mixing the mixture evenly with two or more isocyanate polyisocyanate compounds in the weight ratio of 1:2-2:1, and injecting the mixture into a die at 5 to 40 DEG C for foaming. The obtained nano composite expansion flame retardant polyurethane foamed plastic product effectively reduces the heat release rate and the total heat release amount of the material, improves the oxygen index and the vertical firing flame retardant property of the material, reduces the effect of an expansion type flame retardant on reducing the mechanical properties of the material, and meets the requirements of fire safety and project application.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant polyurethane foam plastics, and in particular relates to a nanocomposite expanded flame-retardant polyurethane rigid foam plastic with enhanced flame-retardant performance and a preparation method thereof. Background technique [0002] According to the introduction on page 373 of the book "Polyurethane Foam" (edited by Liu Yijun, Chemical Industry Press, January 2005), rigid polyurethane foam (PUF) plastics are characterized by their excellent physical and mechanical properties, thermal insulation properties, and low Density, high strength, convenient construction and other characteristics are widely used in various sectors of the national economy. However, because polyurethane foam contains combustible hydrocarbon segments, has low density and large specific surface area, polyurethane foam without flame retardant treatment is combustible, and will burn and decompose in case of fire to pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K3/04C08K5/521C08K5/5333C08K9/04C08K3/34C08K3/32C08G18/42C08G18/48C08G101/00
Inventor 胡源倪健雄宋磊
Owner UNIV OF SCI & TECH OF CHINA
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