Toughened modified phenolic resin foam material and its preparation method

A technology of phenolic resin and foaming materials, which is applied in the field of toughened modified phenolic resin foaming materials and its preparation, can solve the problems of reducing the flame retardancy of phenolic resins, improve toughness, improve rigid structure, and broaden application fields Effect

Active Publication Date: 2014-06-04
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many existing methods to improve the toughness of phenolic resin foam, such as adding natural rubber to phenolic resin, improving foaming agent, curing a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of modified phenolic resin: In a 500 mL four-necked bottle equipped with a stirrer, reflux condenser, and thermometer, add 6.1 g of p-nonylphenol, 122.0 g of phenol, and 171.1 g of 35% formaldehyde aqueous solution, in which formaldehyde The molar ratio to phenol is 1.5. Stir and heat. After the mixture in the bottle reaches 30°C, add 7.4g of ammonia water with a mass fraction of 25% (the mole number of ammonia water is about 4% of the mole number of phenol). After 30 minutes, when the temperature was raised to 90°C, the solution began to boil. After a constant temperature reaction for 50 minutes, the reaction degree was monitored by the cloud point method. After the cloud point reached 80°C, the heating was stopped, and distilled water was added to the four-necked bottle, heated, Stir and wash, stop stirring after 5 minutes, let it stand, after the resin is layered, suck out the water in the upper layer, repeat the washing once, and finally remove the water ...

Embodiment 2

[0036] Preparation of modified phenolic resin: In a 500 mL four-necked bottle equipped with a stirrer, reflux condenser, and thermometer, add 12.0 g p-nonylphenol, 120.0 g phenol, and 205.2 g aqueous formaldehyde solution with a mass fraction of 35%, in which formaldehyde The molar ratio to phenol is 1.8. Stir and heat. After the mixture in the bottle reaches 40°C, add 3.2g sodium hydroxide (the mole number of sodium hydroxide is about 6% of the mole number of phenol), and then continue to heat to 65°C and keep it for 50min. , and then when it was raised to 95°C, the solution began to boil. After a constant temperature reaction for 60 minutes, the reaction degree was monitored by the cloud point method. When the cloud point reached 83°C, the heating was stopped, and distilled water was added to the four-necked bottle, heated and stirred. 1. Washing, stop stirring after 8 minutes, let it stand, after the resin is separated, suck out the water in the upper layer, repeat the washi...

Embodiment 3

[0039] Preparation of modified phenolic resin: In a 500 mL four-necked bottle equipped with a stirrer, reflux condenser, and thermometer, add 23.0 g p-nonylphenol, 115.2 g phenol, and 228.0 g aqueous formaldehyde solution with a mass fraction of 35%, in which formaldehyde The molar ratio to phenol is 2.0, stir and heat, and add 9.3g of ammonia water with a mass fraction of 25% after the mixture in the bottle reaches a temperature of 40°C (the molar amount of ammonia water is about 5% of the molar amount of phenol), and then continue to heat to 70°C and Keep it for 60 minutes, then when it rises to 98°C, the solution starts to boil. After another 60 minutes of constant temperature reaction, use the cloud point method to monitor the reaction degree. When the cloud point reaches 82°C, stop heating, add distilled water into the four-necked bottle, and heat , Stirring, washing, stop stirring after 10 minutes, let it stand still, after the resin is layered, suck out the upper layer o...

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PUM

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Abstract

The invention discloses a toughened modified phenolic resin foam material, the foaming material comprises the following components by weight: 100 parts of modified phenolic resin, 2-10 parts of a surface active agent, 4-12 parts of a foaming agent, 1-12 parts of a modifying agent and 2-10 parts of a curing agent, and the modified phenolic resin comprises nonyl phenol type phenolic resin and phenol type phenolic resin. The invention also discloses a preparation method of the toughened modified phenolic resin foam material. The toughened modified phenolic resin foam material effectively improves the toughness of phenolic foam by combination of changes in the internal structure and the addition of the modifying agent, the excellent flame retardant performance of the toughened modified phenolic resin foam material is not affected, the problem of incapability of concurrent consideration to toughness and flame retardancy of the phenolic foam can be solved, and application areas of the toughened modified phenolic resin foam material as a heat insulation fire retardant material can be broadened.

Description

technical field [0001] The invention relates to a thermal insulation material and a preparation method thereof, in particular to a toughened modified phenolic resin foam material and a preparation method thereof. Background technique [0002] Foamed plastics are widely used in the field of heat insulation and heat preservation due to their low thermal conductivity, light weight, and convenient construction. At present, the dominant foam plastics in the market, such as polystyrene foam, polyvinyl chloride foam, polyurethane foam, etc., have low heat resistance temperature, release a lot of heat after burning, and produce a lot of smoke and poisonous gas, which not only causes environmental pollution, but also becomes a fire hazard. one of the main causes of casualties. The phenolic resin foam is obtained by foaming and curing the foamed phenolic resin mixture. It is light in weight and cheap. The performance makes it more and more popular among people, and gradually becomes...

Claims

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Application Information

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IPC IPC(8): C08L61/08C08L71/08C08J9/14C08G8/24
Inventor 宋玲
Owner HEFEI GENIUS NEW MATERIALS
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