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Flame retardant polyurethane hard foamed plastic

A technology of foamed plastics and polyurethane, which is applied in the field of polyurethane materials, can solve the problems that are rarely seen, and achieve the effect of reducing the speed of flame propagation and benefiting flame retardancy

Inactive Publication Date: 2018-03-09
SHENYANG SHUNFENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although in the past ten years, many flame retardants have been developed in my country, and relevant units have also carried out a series of researches on the flame retardant and fire prevention of rigid polyurethane foam, but it is rare to see the oxygen index specified in the method of grading the combustion performance of building materials. greater than B 1 Grade Rigid Polyurethane Foam System

Method used

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  • Flame retardant polyurethane hard foamed plastic
  • Flame retardant polyurethane hard foamed plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The raw materials of the flame-retardant polyurethane rigid foam are prepared according to the following parts by weight.

[0019] Weigh 40 parts of polyether polyol, 50 parts of polyester polyol, 4 parts of silicone surfactant (AK-8803) as foam stabilizer, and 2,6-di-tert-4-methylphenol as an antioxidant 3 parts, flame retardant Al 2 (OH) 3 20 parts, 8 parts of flame retardant dimethyl methyl phosphate, 12 parts of flame retardant trichloroethyl phosphate, 6 parts of chemical blowing agent water, 6 parts of physical blowing agent n-hexane, 1 part of composite catalyst, isocyanate Index 1.5 copies.

[0020] The preparation method is as follows: dry the raw materials except isocyanate at 90°C for 1 hour, cool naturally to 20°C-30°C, mix them evenly to make a combined polyether, add isocyanate and mix them, and put them into a high-speed mixer SHR-50A Stir at a high speed of 1800rpm for 5 minutes, stop stirring, put the stirred mixture into a mold for foam molding, the...

Embodiment 2

[0023] The raw materials of the flame-retardant polyurethane rigid foam are prepared according to the following parts by weight.

[0024] Weigh 37 parts of polyether polyol, 48 parts of polyester polyol, 4 parts of foam stabilizer silicone surfactant (AK-8803), and 2,6-di-tert-4-methylphenol as an antioxidant 3 parts, flame retardant Al 2 (OH) 3 15 parts, 6 parts of flame retardant dimethyl methyl phosphate, 9 parts of flame retardant trichloroethyl phosphate, 6 parts of chemical foaming agent n-pentane, 6 parts of physical foaming agent petroleum ether, 1 part of composite catalyst , Isocyanate index 2 parts.

[0025] According to the same method as in Example 1, a flame-retardant polyurethane rigid foam was prepared.

Embodiment 3

[0027] The raw materials of the flame-retardant polyurethane rigid foam are prepared according to the following parts by weight.

[0028] Weigh 45 parts of polyether polyol, 55 parts of polyester polyol, 4 parts of foam stabilizer silicone surfactant (AK-8805), 4 parts of antioxidant 2,6-di-tert-4-methylphenol , flame retardant Al 2 (OH) 3 10 parts, 2 parts of flame retardant dimethyl methyl phosphate, 3 parts of flame retardant trichloroethyl phosphate, 6 parts of chemical blowing agent cyclopentane, 6 parts of physical blowing agent trichlorofluoromethane, composite catalyst 1 part, isocyanate index 3.5 parts.

[0029] According to the same method as in Example 1, a flame-retardant polyurethane rigid foam was prepared.

[0030] 1. Performance testing.

[0031] 1. Testing and Characterization.

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Abstract

The invention belongs to the technical field of a polyurethane material, and relates to flame retardant polyurethane hard foamed plastic. The flame retardant polyurethane hard foamed plastic is prepared from the following ingredients in parts by weight: 90 to 100 parts of mixed polyalcohol, 3 to 5 parts of foam stabilizers, 2 to 5 parts of antioxidants, 9 to 40 parts of flame retardants, 5 to 7 parts of chemical foaming agents, 5 to 7 parts of physical foaming agents, 1 to 2 parts of composite catalysts and 1.5 to 4.0 parts of isocyanate index, wherein the flame retardants include Al2(OH)3, dimethyl methylphosphate and 2-chloroethanol phosphate. The flame retardant polyurethane hard foamed plastic has the advantages that the flame retardant performance is obvious; through test, the OI (oxygen index) of the hard polyurethane foamed plastic reaches the standard that the OI is greater than B1 grade, specified in classification methods for combustion performance of building materials; theflame retardant polyurethane hard foamed plastic can be used at high temperature.

Description

technical field [0001] The invention belongs to the technical field of polyurethane materials, and relates to a flame-retardant rigid polyurethane foam. Background technique [0002] Rigid polyurethane foam is a kind of low-density microporous polymer material with closed-cell structure and excellent comprehensive performance. It has the advantages of light weight, low thermal conductivity, thermal insulation and so on. Because rigid polyurethane foam has excellent physical and mechanical properties, electrical properties and chemical corrosion resistance, and has strong adhesion with various materials, it is widely used in building insulation, oil pipelines, car cushions and interior decoration. And other fields, especially in the field of building insulation materials. However, due to its low density, rigid polyurethane foam is generally 15-100kg / m 3 Among them, its structure is composed of fine meridian network structure and very thin film, which has a large specific su...

Claims

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Application Information

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IPC IPC(8): C08G18/40C08G18/48C08G18/42C08K13/02C08K3/22C08K5/521C08J9/08C08J9/14C08G101/00
CPCC08G18/4018C08J9/08C08J9/141C08J9/148C08J2203/02C08J2203/14C08J2203/144C08J2203/182C08J2203/184C08J2375/06C08J2375/08C08K3/22C08K5/521C08K13/02C08K2003/2227C08G2110/0025
Inventor 刘春峰沙世强李迎旭
Owner SHENYANG SHUNFENG NEW MATERIAL CO LTD
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