Modified polystyrene foam and preparation method thereof

A technology of polystyrene foam and polystyrene, applied in the field of thermal insulation materials, can solve the problems of easy melting and dripping, poor self-extinguishing property, etc.

Inactive Publication Date: 2013-06-26
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the PS foam obtained by adding a flame retardant is still relatively easy to burn, and it is easy to melt and drip when burning,

Method used

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  • Modified polystyrene foam and preparation method thereof
  • Modified polystyrene foam and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0040] The modified polystyrene foam provided by the present invention includes a phenolic resin, and the phenolic resin is wrapped on the surface of the polystyrene, so that it can be carbonized to form a protective layer on the surface of the polystyrene when it is ignited, and prevents the flame from burning the polystyrene. The further ignition of the particles and the ability to prevent the polystyrene particles from producing drippings when burning make the modified polystyrene foam provided by the invention have better flame retardancy. In the present invention, the phenolic resin may be an unmodified phenolic resin or a modified phenolic resin, which is not specifically limited in the present invention. In the present invention, the phenolic resin is preferably a thermosetting phenolic resin, and the preparation method of the phenolic resin preferably includes the following steps:

[0041] Carry out addition condensation reaction of phenol and formaldehyde under the ac...

Embodiment 1

[0077] Mixing the phenolic resin and sulfuric acid with a mass ratio of 100:10 evenly to obtain a resin mixture;

[0078] Add polystyrene elastic pellets to the resin mixture, the weight ratio of polystyrene elastic pellets to the above resin mixture is 10:2, and use mechanical stirring to mix the obtained mixture evenly, so that each polystyrene Styrene elastic pellets are covered by phenolic premix;

[0079] Then rush the material into the polystyrene molding equipment quickly, open the inlet valve, rush into the steam with a pressure of 0.2MPa, drive away the air between the particles, heat for about 15 minutes, make the material temperature rise to about 110°C, and then close the outlet At the same time, water is supplied to the cooling water pipe in the mold wall, so that the heating steam in the mold cavity is cooled rapidly, the pressure of the mold cavity drops rapidly, and then gradually cooled and formed, the mold is opened, the cooling water is released, and the for...

Embodiment 2

[0083] Mix the phenolic resin, castor oil-ethylene oxide adduct, n-butane, and phosphoric acid with a mass ratio of 100:3:3:10 to obtain a phenolic resin mixture;

[0084] Add polystyrene elastic pellets to the above-mentioned phenolic resin mixed solution, the weight ratio of the polystyrene elastic pellets to the phenolic resin mixed solution is 10:2, and then the obtained mixed material is mixed evenly by mechanical stirring, so that Each polystyrene elastic pellet is covered by phenolic premix;

[0085] Then quickly rush the obtained material into the polystyrene molding equipment, open the inlet valve, rush into the steam with a pressure of 0.3MPa, drive away the air between the particles, and heat the material for about 15 minutes to raise the temperature of the material to about 110°C, and then Close the air outlet, and at the same time, pass water to the cooling water pipe in the mold wall, so that the heating steam in the mold cavity is cooled rapidly, the pressure of...

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Abstract

The invention provides modified polystyrene foam, polystyrene, an additive and phenolic resin. The phenolic resin wraps the surface of the polystyrene; the additive is dispersed in the polystyrene and the phenolic resin; the additive is one or more of surfactant, foaming agent and curing agent; the mass ratio of the phenolic resin to the additive is 100:(7-45); and the ratio of the total mass of the phenolic resin and the additive to the mass of the polystyrene is (5-100):1. According to the invention, the polystyrene is modified by phenolic resin, and the surface of the polystyrene particles is wrapped with a layer of phenolic resin; thus, when the modified polystyrene foam is ignited, the phenolic resin wrapped on the outer layer is burnt and carbonized to generate a protection layer which prevents the flame from further igniting the polystyrene particles inside and avoids the drop of the burning polystyrene particles; and the modified polystyrene foam provided by the invention has a good flame resistance.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to a polystyrene foam and a preparation method thereof. Background technique [0002] Polystyrene (PS) foam is made of polystyrene resin as the main body, adding foaming agent and other additives. It is currently the most widely used cushioning material. It has a closed-cell structure, low water absorption, and excellent water resistance; low density, generally 0.015-0.03kg / m3; good mechanical strength, excellent cushioning performance; good processability, easy to mold; good coloring, temperature It has the advantages of strong adaptability, excellent anti-radiation, high dimensional accuracy and uniform structure. Therefore, its share in the external wall insulation is very high. Due to its light weight, good thermal insulation and sound insulation effect, and high strength, PS foam plastic can be made into various pipe fittings, aluminum foil composite boar...

Claims

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Application Information

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IPC IPC(8): C08L61/06C08L61/10C08L25/06C08J9/228C08J9/14B29C43/58
Inventor 江成真李枝芳左兴信韩春国巩传海宋国城
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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