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A modified graphite polystyrene board and a preparing method thereof

A technology of graphite polystyrene and expandable polystyrene, which is applied in the field of modified graphite polystyrene board and its preparation, can solve the problem of poor compatibility, inability to solve the problem of melting droplets, and difficulties in the mechanical properties of polystyrene foamed materials. Meet the use requirements and other issues, achieve the effect of low raw material cost and good promotion prospects

Inactive Publication Date: 2014-10-29
HEBEI HAOSHI FOAM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, adding graphite particles to it can achieve the fire protection level of B2, but it still cannot solve the phenomenon of its melting drop
Some, such as CN10176114A, discloses a flame-retardant EPS foam with a method of adding a flame retardant and an adhesive with a particle size of 1-50 μm, and surface expandable polystyrene beads and primary foam particles Coating improves the insulation and flame retardancy of expanded polystyrene foam. The flame retardant used is metal or non-metal oxide, but because the flame retardant used is compatible with the polystyrene shot The mechanical properties of the prepared polystyrene foam material are difficult to meet the requirements of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A modified graphite polystyrene plate, prepared by the following method:

[0030] Put 100 parts of expandable polystyrene beads into a foaming device with a temperature of 120°C and a pressure of 0.4 MPa for pre-expansion, and keep it for 10 seconds to obtain polystyrene pre-expanded particles; pre-expanded Place the particles at room temperature and normal pressure for 4 hours to mature the polystyrene pre-expanded particles; then add 25 parts of expandable graphite with an expansion degree of 300ml / g and 10 parts of cured glue, and stir evenly; continue to add 140 parts of phenolic resin And the remaining 15 parts of cured glue, stir evenly, put it into the board machine for molding, control the pressure of the steam introduced to 0.18MPa, and the steam temperature to 100°C, keep it for 60S, release the pressure, cool, dry and cut, and you get it.

[0031] The preparation method of the cured glue in this example is as follows: 30wt% benzoic acid, 25wt% phosphoric acid...

Embodiment 2

[0033] A modified graphite polystyrene plate, prepared by the following method:

[0034] Put 100 parts of expandable polystyrene beads into a foaming device with a temperature of 100°C and a pressure of 0.5 MPa for pre-foaming, and keep it for 5s to obtain polystyrene pre-expanded particles; Place the particles at room temperature and normal pressure for 4 hours to mature the polystyrene pre-expanded particles; then add 20 parts of expandable graphite with an expansion degree of 300ml / g and 10 parts of cured glue, and stir evenly; continue to add 120 parts of phenolic resin And the remaining 25 parts of cured glue, stir evenly, put it into the board machine for molding, control the pressure of the steam introduced to 0.15MPa, and the steam temperature to 100°C, keep it for 60S, release the pressure, cool, dry and cut, and the vest is obtained.

[0035] The preparation method of the cured glue in this example is as follows: 20wt% of phenolsulfonic acid, 35wt% of boric acid, 15w...

Embodiment 3

[0037] A modified graphite polystyrene plate, prepared by the following method:

[0038] Put 100 parts of expandable polystyrene beads into a foaming device with a temperature of 110°C and a pressure of 0.2 MPa for pre-expansion, and keep it for 10 seconds to obtain polystyrene pre-expanded particles; pre-expanded Place the particles at room temperature and normal pressure for 4 hours to mature the polystyrene pre-expanded particles; then add 35 parts of expandable graphite with an expansion degree of 300ml / g and 10 parts of cured glue, and stir evenly; continue to add 160 parts of phenolic resin And the remaining 10 parts of cured glue, stir evenly, put it into a board machine for molding, control the pressure of the steam introduced to 0.10MPa, and the steam temperature to 100°C, keep it for 60S, release the pressure, cool, dry and cut, and you get it.

[0039] The preparation method of the cured glue in this example is as follows: 27wt% toluenesulfonic acid, 25wt% boric aci...

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Abstract

The invention relates to a modified graphite polystyrene board and a preparing method thereof. Raw materials comprise expandable polystyrene beads, expandable graphite, phenolic resin and a curing adhesive. The preparing method includes: subjecting the expandable polystyrene beads to pre-expansion and curing, mixing with the expandable graphite and a part of the curing adhesive, mixing with the phenolic resin and the rest of the curing adhesive, and moulding and cutting by a board machine. The modified graphite polystyrene board has advantages of high flame retardance, thermal insulation, no melt trickling, and no dripping.

Description

technical field [0001] The invention relates to a modified graphite polystyrene board and a preparation method thereof. Background technique [0002] At present, in the field of thermal insulation of walls, expandable polystyrene is the most widely used thermal insulation material. Disadvantages such as amorphous viscous liquid have affected the application and promotion in the field of wall thermal insulation. [0003] In the prior art, in order to improve the flame retardancy of polystyrene, the usual method is to add flame retardants. For example, adding graphite particles to it can achieve the fire protection level of B2, but it still cannot solve the phenomenon of its molten droplets. Some, such as CN10176114A, discloses a flame-retardant EPS foam with a method of adding a flame retardant and an adhesive with a particle size of 1-50 μm, and surface expandable polystyrene beads and primary foam particles Coating improves the insulation and flame retardancy of expande...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08L25/06C08K7/24C08K3/04
Inventor 郝建国郝英贤梁庆陈彪郭杰
Owner HEBEI HAOSHI FOAM
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