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Flame-retardant type polyurethane rigid foam and preparation method thereof

A rigid foam, polyurethane technology, applied in the field of material processing, can solve the problems of inability to form a stable interface phase, lack of active groups, poor wettability, etc., to reduce the heat release rate and smoke production, and promote the formation of cross-linked networks. , The effect of good flame retardant and smoke suppression performance

Inactive Publication Date: 2018-12-21
JIAXING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the preparation process of flame-retardant polyurethane rigid foam provided by the related technology, basalt fiber is usually combined with polyurethane rigid foam as a separate material layer, because the surface of basalt fiber not only lacks active groups, but also has a smooth surface and poor wettability , the adhesion between basalt fiber and polyurethane rigid foam matrix is ​​very poor, which leads to the inability to form a stable interface phase between the basalt fiber material layer and the matrix, and the compatibility of the prepared flame-retardant polyurethane rigid foam is poor. lower mechanical properties

Method used

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preparation example Construction

[0026] figure 1 It is a method flow chart of a preparation method of a flame-retardant polyurethane rigid foam shown according to an exemplary embodiment, such as figure 1 Shown, the preparation method of described flame-retardant type polyurethane rigid foam comprises:

[0027] Step 101, put the basalt fiber into the washing liquid and wash it for 2 hours, then take it out, use 50-60°C deionized water to repeatedly wash the washed basalt fiber to neutrality, and then place it in an oven at 60°C for drying Dry.

[0028] Among them, the washing liquid is to remove impurities such as grease and dust on the surface of the basalt fiber.

[0029] Step 102, put the dried basalt fiber into a container filled with phosphoric acid solution and ultrasonically treat it for 30 minutes, then put it into a 130°C oven and bake for 5 minutes to obtain phosphoric acid modified basalt fiber, and use deionized water to dissolve the The phosphoric acid-modified basalt fiber was repeatedly wash...

Embodiment 1

[0043] In step 201, put the basalt fiber into the washing solution for washing for 2 hours, then take it out, use 50°C deionized water to repeatedly wash the washed basalt fiber until neutral, and then place it in an oven at 60°C for drying.

[0044] Wherein, the washing solution is a mixed solution formed by blending a sodium dodecylsulfonate solution with a mass concentration of 1.0 g / L and a sodium carbonate solution with a mass concentration of 2.0 g / L; the basalt fiber and the The bath ratio of the washing liquid is 1:50, and the washing temperature is 95°C.

[0045] Step 202, put the dried basalt fiber into a container filled with phosphoric acid solution for ultrasonic treatment for 30 minutes, then put it into an oven at 130°C and bake for 5 minutes to obtain phosphoric acid modified basalt fiber, and use deionized water to dissolve the The phosphoric acid-modified basalt fiber was repeatedly washed to neutrality, and then placed in an oven at 60°C for drying.

[0046...

Embodiment 2

[0053] Step 301, according to the weight ratio of polyether polyol:foam stabilizer:amine catalyst:tin catalyst:foaming agent:isocyanate 100:1.5:0.2~0.3:0.2~0.3:25:100, carry out accurate weighing in sequence Feed into the blending container after measuring to form a mixture, then use a constant speed stirrer to uniformly stir the mixture in the blending container for 15s, then put the mixture into a mold with a temperature of 45°C, and the constant speed stirrer The stirring speed is 1000r / min.

[0054] Step 302, put the mold and the mixture together into an electric blast drying oven with a drying temperature of 60° C., foam and solidify for 30 minutes, take it out, and cool and demould to obtain a flame-retardant polyurethane rigid foam.

[0055] It should be noted that, in one possible case, the amine catalyst is triethylenediamine, the tin catalyst is stannous octoate, the polyether polyol is 4110, and the foam The agent is silicone oil, the blowing agent is HCFC-141b, an...

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Abstract

The invention discloses a flame-retardant type polyurethane rigid foam and a preparation method thereof, and relates to the technical field of processing of materials. The flame-retardant type polyurethane rigid foam and the preparation method have the advantages that the surface of basalt fiber is modified by phosphoric acid to obtain the phosphoric acid-modified basalt fiber, so that the surfaceactivity of the basalt fiber is improved; the phosphoric acid-modified basalt fiber is mixed with phosphotriester-(2-isopropyl chloride) to form a flame-retardant agent for preparing the flame-retardant type polyurethane rigid foam, so as to solve the problems of poor compatibility and low mechanical property due to direct compounding of the basalt fiber and the polyurethane rigid foam matrix, and reach the technical effects of accelerating the formation of a crosslinking network of a polyurethane foam system and improving the mechanical property of the flame-retardant type polyurethane rigidfoam; the phosphoric acid-modified basalt fiber and the phosphotriester-(2-isopropyl chloride) as the flame-retardant agent can be uniformly dispersed into the flame-retardant type polyurethane rigidfoam matrix, so as to reduce the heat release rate and smoke production amount of the polyurethane foam, and reach better flame-retardant and smoke-inhibiting properties of the polyurethane foam.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to a flame-retardant polyurethane rigid foam and a preparation method thereof. Background technique [0002] Rigid polyurethane foam (RPUF) is widely used in the construction industry, especially as a building roof, for its advantages of light weight, good thermal insulation, shock absorption and noise reduction, high compressive strength and good dimensional stability. , wall panels and floors. Polyurethane rigid foam contains flammable hydrocarbon segments, low density, and large specific surface area. Polyurethane without flame-retardant modification is easy to burn and decompose, producing a large amount of toxic smoke. Its limiting oxygen index (LOI) is about 17%. It is a flammable material, which limits the application range of RPUF. In the future, the number of polyurethane rigid foams used will continue to increase, the application fields will continue to expan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L83/04C08K9/02C08K7/10C08K5/521C08J9/14C08G18/48C08G18/76C08G18/79
CPCC08G18/48C08G18/7671C08G18/794C08J9/0038C08J9/0061C08J9/009C08J9/144C08J2203/142C08J2205/10C08J2375/08C08J2483/04C08K5/521C08K7/10C08K9/02
Inventor 许黛芳
Owner JIAXING UNIV
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