JPH01264979A - Fire retardant expanded resin plate - Google Patents

Abstract

PURPOSE:To provide the fire retardant expanded resin plate which is light in weight and has excellent heat resistance, fire resistance, heat insulating characteristic, sound absorbing characteristic, etc., by dispersing expandable resin beads into a matrix consisting of an inorg. silicate expanded polymer essentially consisting of silicate. CONSTITUTION:The fire retardant expanded resin plate 1 is produced by dispersing the expandable resin beads 3 into the matrix 2 consisting of the inorg. silicate expanded polymer which consists essentially of the silicate (e.g.: sodium silicate) and is compounded with necessary additives such as magnesium chloride, sodium silicofluoride and surfactant. Foamable polystyrene beads, expandable polypropylene beads, etc., are used as the expandable resin beads 3. The strength, etc., are additionally improved by laminating and integrating the resulted resin plate 1 to a suitable facing material 4. The resulted fire retardant expanded resin plate is adequately used as a heat insulating plate, curtain wall, etc., for housing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a flame-retardant foamed resin board suitably used as a heat insulating board for a house, an interior/exterior board, a partition board, a curtain wall, etc.

[Conventional technology]

Conventionally, foamed resin plates such as foamed polystyrene have been widely used as various building materials because of their excellent heat insulation and sound absorption properties.

[Problems to be Solved by the Invention] However, foamed resin boards have poor heat resistance and fire resistance, and for this reason, it has been proposed to incorporate flame retardants into foamed resins such as foamed polystyrene. Sex is not enough. Further, although organic halides are often used as flame retardants, foamed resin plates containing such flame retardants have the disadvantage of generating harmful gases when burned.

Furthermore, foamed resin plates have a problem in that they are inferior in mechanical strength and their expansion and contraction change significantly due to heat.

The present invention was made in view of the above circumstances, and is heat resistant.

It has excellent fire resistance, has good acoustic properties such as heat insulation and sound absorption, and has high mechanical strength and little change in expansion and contraction due to heat, making it flame retardant and effective for use as building materials. The purpose is to provide a foamed resin board.

[Means to solve the problem]

In order to achieve the above object, the present invention has foamed resin beads dispersed in a matrix of an inorganic silicate foamed polymer mainly composed of silicate.

In this case, as the foamed resin beads, for example, foamed polystyrene beads, foamed polypropylene beads, foamed polyethylene beads, etc. are used.

[For production]

Since the flame-retardant foamed resin board of the present invention is made of foamed resin beads dispersed in an inorganic silicate foamed polymer mainly composed of silicate as described above, the characteristics of the foamed resin beads are effective. In addition, the disadvantages of the foamed resin beads themselves, such as heat resistance, fire resistance, and mechanical strength, have been improved.

That is, the flame-retardant foamed resin board of the present invention usually has a density of 0.
It is lightweight with a weight of 2 to 0.9 g/-, and its heat resistance is usually 500 to 1000°C.

Since it has excellent fire resistance, it is advantageous in terms of disaster prevention. Furthermore, it is resistant to mechanical stresses such as tension, compression, and bending, exhibits excellent mechanical properties, and is difficult to break or damage, and is difficult to shrink even though foamed resin beads are used. The degree of expansion and contraction due to heat is small.

Moreover, the foamed resin board of the present invention has good heat insulation properties,
In addition to being excellent in preventing dew condensation, it also has a good sound absorption effect, making it suitable as a building material.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

〔Example〕

FIG. 1 shows an embodiment of the flame-retardant foamed resin board of the present invention. This resin board 1 has foamed resin beads 3 in a matrix 2 made of an inorganic silicate foamed polymer mainly composed of silicate. It is distributed. FIG. 2 shows such a resin plate 1 laminated and integrated with a suitable face material 3.

Here, the inorganic silicate foamed polymer constituting the matrix 2 is formed from an inorganic self-hardening composition containing a silicate or a metasilicate as a main component and a surfactant added thereto. A flame-retardant foamed resin board can be obtained by foaming and curing a mixture in which foamed resin beads are dispersed and mixed.

To explain the above inorganic self-hardening composition in more detail, its composition is as follows (in addition, % indicates weight %)
.

Silicate 15-66%, more preferably 30-6
0% kaolin 0-28%, more preferably 5
~20% water-soluble magnesium salts 0-1%, more preferably 0.2-0.8% silicofluoride salts 2-20%, more preferably 5-15% metasilicates 3-58%,
More preferably 3-30% surfactant 0.1
~2%, more preferably 0.1-1% water
0 to 15%, more preferably 5 to 13% In this case, the silicate is sodium silicate, the water-soluble magnesium salt is magnesium chloride, the silicofluoride salt is sodium silicofluoride, and the metasilicate is sodium metasilicate. As the surfactant, anionic surfactants such as sodium lauryl sulfate are preferably used.

Further, examples of the foamed resin beads to be dispersed and mixed in the above composition include foamed polystyrene beads, foamed polypropylene beads, and foamed polyethylene beads. Its size is appropriately selected, and as the foamed resin beads, beads that are expanded 10 to 50 times are preferably used.

The mixing ratio of the foamed resin beads to the above-mentioned inorganic self-hardening composition can be variously selected, but from the viewpoint of adhesion to the foamed resin beads, the former:latter = 99 = 85 to 1:15 (weight ratio). is suitable.

The composition may optionally contain inorganic fibers such as rock wool and glass wool, organic short fibers such as polyester, polyamide, polypropylene, and vinylon, and vermiculite as inorganic or organic fillers.

Shirasu balloon, glass balloon, perlite.

Light foam aggregate such as foam glass waste, other mica powder, sand,
Suitable materials can be mixed, such as rock or glass chips. In this case, the mixing ratio of these mixtures is not particularly limited, but the total amount of the above composition and foamed resin beads is 10
It can be 50 parts or less, especially 30 parts or less relative to 0 parts.

The flame-retardant foamed resin board of the present invention is manufactured by injecting a mixture prepared by dispersing and mixing foamed resin beads into the above-mentioned composition into a mold, or by spraying it onto a metal plate, wooden plywood, etc. However, in this case, the mixture is sufficiently stirred to entrain air into the mixture and foam before being injected or sprayed.6 Note that the stirring time and stirring speed depend on the amount of air entrained in the mixture. Although it differs depending on the situation, stirring is usually employed at 50 to 1000 rpm for about 5 to 30 minutes. Here, the amount of air entrainment is determined by the density of the final cured product being 0.
．． 2-0.9g/aI? (Incidentally, when the above-mentioned compound is cured without involving air in this way, the density is usually 0.6 to 1.1 g/
a+l). When a mixture containing air is allowed to stand still, this mixture (the above-mentioned composition) is self-hardening and hardens in a foamed state with air voids formed by the trapped air.

In addition, when the above-mentioned mixture containing air is spray-molded onto a plate material, the plate material can be used as a facing material without being peeled off after forming, but in this case, the second
A resin plate with laminated face materials as shown in the figure can be obtained. In addition, when the above-mentioned compound is cured on a plate material (face material), it has self-adhesive strength and has high adhesive strength to metals, etc., so that it can be bonded and integrated without using an adhesive.

〔Effect of the invention〕

The resin plate of the present invention usually has a density of 0.2 to 0.9 g/
ci, is lightweight, and its heat-resistant temperature is usually 500~
It has excellent heat resistance and fire resistance at 1000℃, and also has high mechanical strength, and is difficult to expand, contract, or deform due to heat.
It also has excellent heat insulation and sound absorption effects.

Therefore, it can be effectively used as various building materials such as heat insulation boards for houses, interior and exterior boards, partition boards, curtain walls, etc.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are sectional views each showing an embodiment of the present invention. 1... Flame-retardant foamed resin board, 2... Matrix,
3... Foamed resin beads, 4... Face material. Applicant Fujimori Kogyo Co., Ltd. Agent Patent Attorney Takashi Kojima

Claims (1)

[Claims] 1. A flame-retardant foamed resin board comprising foamed resin beads dispersed in an inorganic silicate foamed polymer mainly composed of silicate.