High-strength and flame-retardant hard polyurethane thermal insulation material for building and preparation method of thermal insulation material

A rigid polyurethane and high-strength technology, which is applied in the field of flame-retardant rigid polyurethane, can solve the problems of affecting the mechanical properties of composite materials, the fire resistance has not been greatly improved, and the industrialization cost is expensive, so as to achieve less addition and high compressive strength and tensile strength, low cost effect

Inactive Publication Date: 2017-01-04
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the large volume of powdered rock wool particles, it is easy to deposit in the polyurethane matrix, and the dispersion is uneven, and the surface of the rock wool powder without modification is poor in compatibility with the matrix. Simply relying on adding rock wool powder to improve the fire protection level of polyurethane materials , a large amount of powder needs to be added, which seriously affects the mechanical properties of the composite material
The Chinese patent with the publication number CN105199067 A discloses a method for producing polyurethane foam. Carbon fibers with a length of 20nm-100nm are compounded with polyol...

Method used

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  • High-strength and flame-retardant hard polyurethane thermal insulation material for building and preparation method of thermal insulation material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Modification of asbestos fibers: (1) Cut the asbestos fibers into small sections of 3-10 mm in length, soak them in the configured ammonium chloride aqueous solution with a mass concentration of 5%, stir and disperse them, and keep the temperature at 80°C. Carry out surface etching treatment, take it out after 2 hours of treatment, and dry at 80° C. for 2 hours; (2) configure a silane coupling agent KH540-ethanol mixed solution, wherein the mass fraction of the coupling agent KH540 is 10%, and take the drying method in step (1). The quality of the dried asbestos fiber is 8 times of the coupling dose, soak the dried asbestos fiber in the coupling agent-ethanol solution for 5 hours at room temperature, take it out by ultrasonication, and dry it at 70°C for 4 hours to obtain a new modified asbestos fiber fiber.

[0029] The compound flame retardant is a mixture of inorganic flame retardants and organic phosphate flame retardants in a mass ratio of 1:1.

[0030] The raw ma...

Embodiment 2

[0044] Modification of asbestos fibers: (1) Cut the asbestos fibers into small sections of 3-10mm in length, soak them in the configured ammonium chloride aqueous solution with a mass concentration of 20%, stir and disperse them, and keep the temperature at 100°C. Carry out surface etching treatment, take it out after 4 hours of treatment, and dry at 120°C for 4 hours; (2) Prepare a mixed solution of silane coupling agent KH550-ethanol, wherein the mass fraction of coupling agent KH550 is 15%, and dry it in (1) The final asbestos fiber has a mass 20 times that of the coupling dose. Soak the dried asbestos fiber in (1) in a coupling agent-ethanol solution for 8 hours at room temperature and take it out by ultrasonication, and dry it at 90°C for 6 hours to obtain a new improved Sexual asbestos fibers.

[0045] The compound flame retardant is a mixture of inorganic flame retardants and organic phosphate flame retardants in a mass ratio of 1:1.5.

[0046] The raw material formula...

Embodiment 3

[0062] Modification of asbestos fibers: (1) Cut the asbestos fibers into small sections of 3-10mm in length, soak them in the configured ammonium chloride aqueous solution with a mass concentration of 15%, stir and disperse them, and keep the temperature at 90°C. Carry out surface etching treatment, take it out after 2.5 hours of treatment, and dry at 100°C for 3.5 hours; (2) Prepare a mixed solution of silane coupling agent KH791 / KH901-ethanol, wherein the mass fraction of coupling agent KH550 / KH901 (3:7) 12%, take the asbestos fiber after drying in step (1), its quality is 15 times of the coupling dose, soak the asbestos fiber after drying in the coupling agent-ethanol solution at room temperature and take it out by ultrasonic for 6h, 80 Dry at ℃ for 5.5 hours to obtain new modified asbestos fibers.

[0063] The compound flame retardant is a mixture of inorganic flame retardants and organic phosphate flame retardants in a mass ratio of 1:3.

[0064] The raw material formula...

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Abstract

The invention discloses a high-strength and flame-retardant hard polyurethane composite. The composite is prepared as follows: flame-retardant hard polyurethane foam plastic and modified asbestos fibers are mixed and injected into a mold for foaming forming, wherein the flame-retardant hard polyurethane foam plastic contains a component A and a component B, the component A comprises polyalcohol, a catalyst, a foaming agent, a stabilizer, a crosslinking agent and a compound flame retardant, and the component B is polyaryl polymethylene isocyanate. The specific flame retardant is selected for compounding, obtained hard polyurethane foam doesn't contain halogen, and the limit oxygen index is high. After the asbestos fibers are modified with a physical-chemical method, the prepared flame-retardant hard polyurethane composite has higher compression strength, tensile strength and shock resistance while compared with ordinary polyurethane/inorganic filler. The technological procedure is easy to operate, the cost is low, and the prepared high-strength and flame-retardant hard polyurethane thermal insulation material has good application prospect. The invention discloses a preparation method of the thermal insulation material.

Description

technical field [0001] The invention relates to a flame-retardant rigid polyurethane, in particular to a high-strength flame-retardant rigid polyurethane thermal insulation material for buildings and a preparation method thereof. Background technique [0002] As a polymer material used in the construction field, it not only requires a certain thermal stability and flame retardancy, but also requires higher mechanical properties to meet its strength and stiffness needs. Polyurethane foam is a kind of heat insulation material with excellent performance. Polyurethane rigid foam is light in weight and contains a large number of closed pores inside the foam, which is beneficial to heat insulation. However, the molecules of pure polyurethane rigid foam materials are mainly C and H elements, and there is no resistance. It is easy to burn in the presence of combustible elements, and it will immediately produce flames when it comes into contact with the fire source, which cannot be c...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08K13/06C08K9/06C08K9/02C08K7/12C08K3/38C08K5/521C08K3/24C08K3/22C08K5/523C08J9/14C08G101/00
CPCC08G18/48C08G18/6677C08G18/6688C08G18/7664C08J9/144C08J2203/142C08J2375/08C08K3/2279C08K3/24C08K3/38C08K5/521C08K5/523C08K7/12C08K9/02C08K9/06C08K13/06C08K2003/387C08K2201/014C08G2110/0025
Inventor 丁寅徐东洋刘丽张琳娜
Owner NANJING UNIV
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