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Preparation method for halogen-free flame-retardant toughened phenolic foamed plastics

A phenolic foam plastic and toughening technology, applied in the field of materials, can solve the problems such as the reduction of the flame retardant performance of the phenolic foam plastic, and achieve the effects of small combustion smoke, good mechanical properties, and good flame retardant effect.

Inactive Publication Date: 2012-10-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to literature reports [Fire Science and Technology, 2006,25 (03): 373-375], commonly used tougheners for phenolic foam plastics, such as rubber tougheners, thermoplastic resins (such as polyvinyl alcohol, polyethylene glycol Alcohol), and small molecular substances (such as ethylene glycol) are flammable or flammable. Although adding these tougheners to phenolic foam plastics improves the toughness of foam plastics, it will lead to flame retardancy of phenolic foam plastics. reduce

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Firstly, 100 parts of resole phenolic resin were weighed, and then 5 parts of polyethylene glycol 400, 6 parts of Tween-80, 10 parts of complex acid, 8 parts of cyclopentane and 3 parts of melamine phosphate were added respectively. Stir quickly and evenly, pour it into a mold to close the mold, and foam at 90°C for 60 minutes to obtain the required halogen-free flame-retardant and toughened phenolic foam.

Embodiment 2

[0018] First weigh 100 parts of resole phenolic resin (is it the same substance as before, "resole phenolic resin"), then add 6 parts of polyethylene glycol 800, 3 parts of OP-6, and 12 parts of compound acid, 10 parts petroleum ether and 3 parts melamine cyanurate. Stir quickly and evenly, pour it into a mold to close the mold, and foam at 60°C for 60 minutes to obtain the required halogen-free flame-retardant and toughened phenolic foam.

Embodiment 3

[0020] First weigh 100 parts of resole phenolic resin, then add 10 parts of natural rubber, 6 parts of sodium dodecylbenzenesulfonate, 10 parts of complex acid, 5 parts of n-pentane and 5 parts of melamine cyanurate . Stir quickly and evenly, pour it into a mold and close it, and foam at 75°C for 40 minutes to obtain the required halogen-free flame-retardant and toughened phenolic foam.

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Abstract

The invention specifically relates to a preparation method for halogen-free flame-retardant toughened phenolic foamed plastics, which belongs to the technical field of materials. The method comprises the following steps: weighing 100 parts of resol resin and then respectively adding a plasticizer, a surfactant, a curing agent, a foaming agent and a halogen-free flame retardant; and evenly mixing the above mentioned components under rapid stirring, pouring an obtained mixture into a die, closing the die and carrying out foaming at a temperature of 60 to 100 DEG C for 30 to 60 min so as to obtain the flame-retardant toughened phenolic foamed plastics. The prepared flame-retardant toughened phenolic foamed plastics have the advantages of a good flame retardant effect (wherein an oxygen index is as high as 40%), a small smoke volume in combustion, no production of toxic and corrosive gas and good mechanical properties.

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 toughened phenolic foam plastic. Background technique [0002] Phenolic foam is a kind of rigid thermosetting foam obtained by foaming phenolic resin. Compared with materials such as polystyrene foam and polyurethane foam, phenolic foam has the advantages of heat resistance, flame retardant, self-extinguishing, low smoke, resistance to flame penetration, no dripping in case of fire, good dimensional stability, etc., and is widely used. Used as thermal insulation materials, etc. However, phenolic foam also has defects such as high hardness and high brittleness, which seriously affect the application and development of phenolic foam. Therefore, it is necessary to toughen the phenolic foam. [0003] In order to improve the toughness of phenolic resin, the following methods can generally be adopted: (1) Add a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08L71/08C08L9/02C08L9/06C08L7/00C08K5/521C08K5/3492C08J9/14
Inventor 王正洲徐少洪隋孝禹
Owner TONGJI UNIV
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