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A kind of phenolic resin modified polystyrene foam and preparation method thereof

A polystyrene foam and phenolic resin technology, which is applied in the field of phenolic resin modified polystyrene foam and its preparation, can solve the problems of poor self-extinguishing property and easy burning of EPS boards

Inactive Publication Date: 2016-08-24
SHANDONG HAIGUAN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coating an intumescent coating with flame-retardant properties on the surface of EPS or wrapping a non-combustible sheet can also achieve effective flame-retardant methods, but the EPS boards obtained by these methods are still flammable and have poor self-extinguishing properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Add 100g of phenol and 120g of 50% by weight formaldehyde solution into the reactor in sequence, followed by adding 1g of 50% by weight sodium hydroxide solution, and slowly raise the temperature to 70°C. After reacting for 70min, add 33g of furfuryl alcohol, and raise the temperature to 90°C to continue the reaction for 60min. After the reaction, the reaction solution was cooled, and acid was added to adjust the pH value of the system to 7. Dehydration gives phenolic resin. The viscosity is controlled at 2800mPa·s / 25℃, and the water content is 8%.

Embodiment 2

[0050] Add 100g of phenol and 120g of 50% by weight formaldehyde solution into the reactor in sequence, then add 1.5g of barium hydroxide solution, slowly raise the temperature to 70°C, react for 70min, add 33g of furfuryl alcohol, raise the temperature to 90°C and continue the reaction for 60min. After the reaction, the reaction solution was cooled, and acid was added to adjust the pH value of the system to 7. Dehydration gives phenolic resin. The viscosity is controlled at 2600mPa·s / 25℃, and the water content is 8%.

Embodiment 3

[0052] Add 100g of phenol and 120g of 50% by weight formaldehyde solution into the reactor in sequence, then add 1.5g of barium hydroxide solution, slowly raise the temperature to 70°C, react for 70min, add 33g of furfuryl alcohol, raise the temperature to 95°C and continue the reaction for 60min. All the other are with embodiment 1. The viscosity is controlled at 3000mPa·s / 25℃, and the water content is 7.5%.

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Abstract

The invention relates to phenolic resin modified polystyrene foam and a preparation method thereof. The preparation method of the phenolic resin modified polystyrene foam comprises the following steps: (1) synthesizing phenolic resin, namely adding phenol and formaldehyde solution into a reactor, stirring, heating until the reaction temperature is 65-80 DEG C while an alkali catalyst is added, adding furfuryl alcohol after a heat preservation reaction is carried out for a period of time, heating to 80-95 DEG C, and continuously reacting; after reaction is finished, cooling reaction liquid, adding an acid solution to regulate the pH value of a system to be 6-7, and dehydrating, thus obtaining the phenolic resin; (2) preparing modified polystyrene foam, namely uniformly stirring the phenolic resin with an emulsifying agent, an inorganic filler and a foaming agent, thus obtaining a phenolic resin mixture; mixing the mixture with polystyrene elastic material granules, adding a curing agent and mixing, putting the obtained mixture into a mould at certain temperature and pressure, and carrying out compression moulding, thus obtaining a moulded product. The phenolic resin modified polystyrene foam has the advantages that the phenolic resin uniformly wraps the surfaces of polystyrene particles, the phenolic resin wrapping the outer layer is carbonized to form a protective layer, and further ignition of flame to the polystyrene particles is isolated.

Description

technical field [0001] The invention relates to a method for synthesizing a phenolic resin and a method for using the phenolic resin to prepare polystyrene foam, in particular to a phenolic resin modified polystyrene foam and a preparation method thereof. Background technique [0002] Polystyrene foam (EPS) is made by foaming polystyrene particles. Polystyrene foam uses relatively environmentally friendly saturated hydrocarbons, carbon dioxide or water as foaming agents, which will not cause environmental pollution problems. In addition, EPS is easy to dissolve and crush, and can be recycled, further reducing waste. EPS has a closed-cell honeycomb structure, which allows it to have low water absorption and thermal conductivity; high compression resistance and aging resistance. Due to the unique structure of EPS, it has been widely used in building components such as roofs, walls, and pipes. [0003] Although EPS has excellent physical properties, it is an organic hydrocar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/14C08L25/06C08K13/02C08K3/26C08K5/42C08K3/32C08K3/30C08J9/14C08G8/28
Inventor 钟东南孙志武刘涛陈志强王世昌
Owner SHANDONG HAIGUAN CHEM TECH