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Flame-retardant coated-type polystyrene pre-expanded bead and its preparation method

A technology of polystyrene and expandable polystyrene, applied in the field of building materials, can solve problems such as difficulty in construction, complicated process, and staying in the scientific research stage, and achieve the effect of solving flammability

Active Publication Date: 2014-07-16
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of method is complicated, and most of them only stay in the stage of scientific research
3. The method of coating particles with thermosetting flame retardant resin, but the cost of this method is relatively high
Similarly, most of the materials are inorganic materials, and it is difficult to meet the expectations of light fireproof materials. In addition, the thermal conductivity is relatively high and the bulk density is large, which brings certain difficulties to the construction.
[0008] CN102807683 and CN102863706 also disclose two kinds of polystyrene foam materials, which are coated with expandable polystyrene particles with non-flammable resin to make plates. Although this product coated with organic resin reduces flammability, it reduces to a very limited extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0037] The ordinary grade E-303 expandable polystyrene particles were pre-expanded for 30 minutes under a steam pressure of 0.05 MPa to obtain polystyrene beads with a particle diameter of 4-6 mm, counting as 50 parts.

[0038] Pour 25 parts of inorganic flame retardant slurry and 25 parts of organic flame retardant slurry into the mixer together with 50 parts of pre-released polystyrene beads, mix and coat evenly, and then put it in a 70°C oven for 20 minutes and take it out Obtain flame-retardant coated polystyrene pre-haired particles.

[0039] The flame-retardant coated polystyrene pre-expanded particles were prepared into polystyrene products according to the normal foaming molding process, and the obtained product did not drip when exposed to fire, and the limiting oxygen index was 28.7%.

example 2

[0041] The ordinary grade E-501 expandable polystyrene particles were pre-expanded for 18 minutes under the steam pressure of 0.2 MPa to obtain polystyrene beads with a particle diameter of 3-5 mm, counting as 65 parts.

[0042] Mix 10 parts of sodium silicate with a modulus of 2.8 and a concentration of 15%, 20 parts of 2000 mPa·s phenolic resin, 2 parts of aluminum hydroxide flame retardant, and 3 parts of expandable graphite flame retardant, and mix them well with the additives, and then 65 parts of pre-released polystyrene beads were poured into a mixer to mix and coated evenly, and then placed in an oven at 105°C for 7 minutes and then taken out.

[0043] The flame-retardant coated polystyrene pre-expanded granules were used to produce polystyrene products according to the normal foaming molding process. The obtained product did not drip when exposed to fire, and the limiting oxygen index was 26.8%.

example 3

[0045] The flame-retardant grade F-302 expandable polystyrene particles were pre-expanded under 0.35 MPa steam pressure for 8 minutes to obtain polystyrene beads with a particle size of 2-4 mm, which was counted as 45 parts.

[0046] Combine modulus 3.1, 20 parts of potassium silicate with concentration of 25%, 20 parts of silica sol with concentration of 30%, 5 parts of urea-formaldehyde resin of 1000 mPa·s, 5 parts of magnesium hydroxide flame retardant, 5 parts of phosphate ester flame retardant, and After the additive is fully stirred evenly, pour it into the mixer together with 45 parts of pre-released polystyrene beads to mix and coat evenly, and then put it in a 90°C oven for 15 minutes and take it out.

[0047] The flame-retardant coated polystyrene pre-expanded granules are used to produce polystyrene products according to the normal foaming molding process. The obtained product does not drip when exposed to fire, and the limiting oxygen index is 29.3%.

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Abstract

The invention relates to a flame-retardant coated-type polystyrene pre-expanded bead and its preparation method. The pre-expanded bead mainly comprises 40 to 80 parts of expandable polystyrene particles, 20 to 60 parts of an inorganic coating material and 2 to 10 parts of a flame retardant agent, wherein the inorganic coating material is one or more substance from silicon sol, sodium silicate and potassium silicate, the silica sol concentration is 20-60%, if the soluble silicate is used, the modulus can be 2-4, and concentration can be 10-50%. The flame-retardant coated-type polystyrene pre-expanded bead has the advantages of simple preparation process and low cost, and can well solve the problems that polystyrene foam materials are flammable and easy to drop.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a fireproof heat insulating material and a preparation method thereof. Background technique [0002] Polystyrene foam board is widely used in thermal insulation due to its low water absorption, light weight, high mechanical strength, and low price. At this stage, it has become the most widely used external wall insulation material in the world. [0003] However, general polystyrene foam boards are flammable materials, and they are easy to melt and drip when burned, and produce a large amount of toxic and dense smoke, which brings great hidden dangers to fire safety. At present, the flame retardant methods of polystyrene foam mainly include the following categories: 1. The method of adding flame retardants. This method is simple and direct, but it cannot effectively solve the fire prevention problem. 2. Copolymerize the flame retardant monomer with styrene to obtain polystyrene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/224C08L25/06C08L61/06C08L61/24C08K3/36C08K3/34C08K3/22C08K3/04C08K5/521
Inventor 邓刚彭绵广乔林吕爱超王元曦
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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