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Syntactic foam and preparation method thereof

A technology of syntactic foam and plastic foam, which is applied in the field of flame retardant materials, can solve the difficult problems of polystyrene foam droplet and other problems, and achieve the effect of solving burning droplet, low smoke generation and low cost

Inactive Publication Date: 2014-04-09
林百川
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods all greatly improve the flammability of polystyrene foam and improve the fire safety performance, but it is difficult to solve the problem of molten polystyrene foam

Method used

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  • Syntactic foam and preparation method thereof
  • Syntactic foam and preparation method thereof
  • Syntactic foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of thermosetting phosphating phenolic resin prepolymer: Weigh 100g of phenol and 58g of phosphoric acid, put them in a 500ml three-neck flask, heat up to 135°C for dehydration and esterification for 5h, then depressurize (vacuum degree -0.08MPa) for 2h, cool to 70°C, use 30% sodium hydroxide solution to adjust the pH value to 10-11, add 130g of 38wt% formaldehyde solution, 1.2g of zinc acetate, heat up to 95°C for 3.5h, then cool down to 65°C, vacuum evaporate with water pump After removing moisture, a thermosetting phosphating phenolic resin prepolymer is obtained.

[0026] The deployment of curing agent: take 30wt% of phenolsulfonic acid, 25wt% of phosphoric acid, 15wt% of sulfuric acid, and 30wt% of water, stir and dissolve for later use;

[0027] Uniform coating of polystyrene foam particles: take 10L of polystyrene foam particle base material (16g / L), add 200g of the above-mentioned curable thermosetting phosphating phenolic resin prepolymer (prepared a...

Embodiment 2

[0030] The deployment of curing agent: take p-toluenesulfonic acid 30wt%, phosphoric acid 10wt%, sulfuric acid 30wt%, water 30wt%, stir and dissolve for later use;

[0031] Uniform coating of polystyrene foam particles: Take 10L polystyrene foam particle base material (density 14g / L), add 140g of the above thermosetting phosphating phenolic resin prepolymer, stir well and add expandable graphite (expansion degree 60ml / g) 7g, after stirring evenly, add 7g of the above-mentioned curing agent, and continue stirring until evenly coated polystyrene foam particles are obtained;

[0032] Compression molding: Add the above-mentioned polystyrene foam particles evenly coated with thermosetting phosphating phenolic resin prepolymer into the steam hot pressing mold, close the mold, feed high-pressure steam with a pressure of 0.05MPa, and keep the pressure for 40s , pressure relief, cooling, and mold opening to obtain polystyrene / phosphorized phenolic resin / graphite composite foam, and th...

Embodiment 3

[0034] The deployment of curing agent: take 30wt% phenolsulfonic acid, 20wt% phosphoric acid, 10wt% p-toluenesulfonic acid, 20wt% sulfuric acid, 20wt% water, stir and dissolve for later use;

[0035] Uniform coating of polystyrene foam particles: Take 10L polystyrene foam particle base material (16g / L), add 250g of the above-mentioned thermosetting phosphating phenolic resin prepolymer (prepared according to Example 1), stir well, add Expandable graphite (expansion degree 180ml / g) 25g, after stirring evenly, add 32g of the above curing agent, continue stirring until evenly coated polystyrene foam particles are obtained;

[0036] Compression molding: Add the above-mentioned polystyrene foam particles evenly coated with thermosetting phosphating phenolic resin prepolymer into the steam hot pressing mold, close the mold, feed high-pressure steam with a pressure of 0.05MPa, and keep the pressure for 40s , pressure relief, cooling, and mold opening to obtain polystyrene / phosphorize...

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Abstract

The invention relates to syntactic foam and a preparation method thereof, specifically relates to a polystyrene / phosphatized phenolic resin / graphite syntactic foam, and a preparation method thereof, and belongs to the field of flame retardant materials. A formula for the syntactic foam comprises polystyrene foam particles, a thermoset phosphatized phenolic resin prepolymer, expandable graphite and a curing agent. The preparation method of the syntactic foam comprises the steps of coating the thermoset phosphatized phenolic resin prepolymer on surfaces of preset polystyrene foam particles; adding the expandable graphite and the curing agent; and then preparing the polystyrene / phosphatized phenolic resin / graphite syntactic foam under proper temperature and pressure. The syntactic foam has the characteristics of high flame retardant property, low smoke production amount, low cost and excellent performances. Fire melting drip of polystyrene is solved fundamentally; and novel selection is provided for exterior wall thermal insulation materials.

Description

technical field [0001] The invention relates to a composite foam plastic and a preparation method thereof, in particular to a polystyrene / phosphating phenolic resin / graphite composite foam plastic and a preparation method thereof, belonging to the field of flame retardant materials. Background technique [0002] Styrofoam is currently the most widely used exterior wall insulation material in the world. However, polystyrene foam is extremely flammable, and produces a large amount of dense smoke when burned, and it is easy to melt and drip when burned, which accelerates the spread of fire and brings great hidden dangers to fire safety. Therefore, improving the flammability of polystyrene foam and improving the safety of polystyrene foam has become a research focus and focus in the industry. [0003] At present, the flame retardant method of polystyrene foam is mainly realized by adding flame retardants, which is relatively simple and practical. For example, in patents US6130...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08L25/06C08K13/04C08K7/24C08K3/04C08K3/30C08K5/42C08K3/32C08K3/38C08G8/28C08J9/228B29C41/02
Inventor 林百川刘洪瑞
Owner 林百川
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