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Preparation method of halogen-free flame retardant and application of halogen-free flame retardant to rigid polyurethane foam

A technology of rigid polyurethane and flame retardant, applied in the field of materials, can solve the problems of poor compatibility between halogen-free flame retardant and polyurethane foam matrix, flammability of rigid polyurethane foam, deterioration of mechanical properties of rigid polyurethane foam, etc. Improved mechanical properties, good compatibility and low hydroxyl value

Inactive Publication Date: 2016-06-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a preparation method of a halogen-free flame retardant and its application in rigid polyurethane foam, so as to solve the problem that the current rigid polyurethane foam is flammable and the compatibility between the halogen-free flame retardant and the polyurethane foam matrix is ​​poor and other defects, avoiding the serious deterioration of the mechanical properties of rigid polyurethane foam due to the addition of a large amount of halogen-free flame retardants

Method used

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  • Preparation method of halogen-free flame retardant and application of halogen-free flame retardant to rigid polyurethane foam
  • Preparation method of halogen-free flame retardant and application of halogen-free flame retardant to rigid polyurethane foam
  • Preparation method of halogen-free flame retardant and application of halogen-free flame retardant to rigid polyurethane foam

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Add 12.6g of melamine, 15.8g of phenylphosphoric acid, and 270ml of water into an Erlenmeyer flask, raise the temperature to 70°C and keep stirring, react for 5h, filter the product, wash with water, and dry to obtain melamine phenylphosphate. Infrared spectrum of melamine phenyl phosphate, see figure 1 .

[0019] First mix 100 parts of polyether polyol and 10 parts of melamine phenyl phosphate evenly, then add 4 parts of amine catalyst, 0.6 part of organotin catalyst, 2 parts of water and 2 parts of silicone oil foam stabilizer, mix well, and then quickly add 140 parts of polymethylene polyphenyl polyisocyanate, stirred evenly at high speed, poured into the mold for foaming, after the foam was formed, the foam was taken out and placed in an oven at 60°C for 24 hours to obtain the halogen-free flame retardant hard Polyurethane foam.

Embodiment 2

[0021] Add 12.6g of melamine, 15.8g of phenylphosphoric acid, and 300ml of water into an Erlenmeyer flask, raise the temperature to 95°C and keep stirring, react for 3h, filter the product, wash with water, and dry to obtain melamine phenylphosphate.

[0022] First mix 100 parts of polyether polyol and 20 parts of melamine phenyl phosphate evenly, then add 4 parts of amine catalyst, 0.6 part of organotin catalyst, 2 parts of water and 2 parts of silicone oil foam stabilizer, mix well, and then quickly add 140 parts of polymethylene polyphenyl polyisocyanate, stirred evenly at high speed, poured into the mold for foaming, after the foam was formed, the foam was taken out and placed in an oven at 60°C for 24 hours to obtain the halogen-free flame retardant hard Polyurethane foam.

Embodiment 3

[0024] Add 12.6g of melamine, 15.8g of phenylphosphoric acid, and 400ml of water into an Erlenmeyer flask, raise the temperature to 80°C and keep stirring, react for 4h, filter the product, wash with water, and dry to obtain melamine phenylphosphate.

[0025] First mix 100 parts of polyether polyol and 30 parts of melamine phenyl phosphate evenly, then add 4 parts of amine catalyst, 0.6 part of organotin catalyst, 2 parts of water and 2 parts of silicone oil foam stabilizer, mix well, and then quickly add 140 parts of polymethylene polyphenyl polyisocyanate, stirred evenly at high speed, poured into the mold for foaming, after the foam was formed, the foam was taken out and placed in an oven at 60°C for 24 hours to obtain the halogen-free flame retardant hard Polyurethane foam.

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Abstract

The invention belongs to the technical field of materials and particularly relates to a preparation method and an application of a halogen-free flame retardant. The component of the halogen-free flame retardant is melamine phenyl phosphate formed by reacting melamine with phenyl phosphoric acid, the preparation method comprises the specific steps as follows: melamine and phenyl phosphoric acid are added to a conical flask in the molar ratio being 1:1, then water with the amount accounting for 150-500 times that of melamine is added, the mixture is evenly stirred and heated to 70-95 DEG C and reacts for 3-5 h, a product is filtered, washed with water and dried, and melamine phenyl phosphate is obtained. For 100 parts of polyether polyol by weight in halogen-free flame retardant rigid polyurethane foam, 10-50 parts of halogen-free flame retardant melamine phenyl phosphate are used. The obtained halogen-free flame retardant rigid polyurethane foam has good flame retardation and mechanical properties. The method adopts a simple process, has low requirements for equipment, and is convenient to operate and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a halogen-free flame retardant and its application in rigid polyurethane foam. Background technique [0002] Rigid polyurethane foam (abbreviated as rigid polyurethane foam) is made by mixing the main raw materials (polyisocyanate and polyether polyol), foaming agent, catalyst, flame retardant and other additives evenly and foaming. Rigid polyurethane foam is widely used as heat insulation and thermal insulation materials due to its excellent thermal insulation effect, light weight, high specific strength, and convenient construction. However, rigid polyurethane foam is extremely flammable and often causes fire accidents. [0003] At present, the flame retardants commonly used in rigid polyurethane foam are mainly halogen flame retardants. Although halogen flame retardants have the advantages of high flame retardant efficiency and good comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/48C08K5/5317C07F9/38C07D251/56C08G101/00
CPCC07D251/56C07F9/3834C08G18/48C08G18/7664C08K5/5317C08G2110/0025
Inventor 王正洲孙皓宇
Owner TONGJI UNIV
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