JPH06297621A - Water-resistant heat insulating composite panel - Google Patents

Abstract

PURPOSE:To obtain a heat insulating composite panel with excellent waterproof properties, no decrease in heat insulating properties for a long period and large adhesive forces between a facing material and a phenol foam and the facing material and a concrete and a GL bond. CONSTITUTION:A water-resistant paper 2 prepd. by coating at least one face with a polymer latex 3 is laminated on at least one face of a resol-type phenol foam so as to face the polymer latex-coated face 3 to the outside surface. It is possible thereby to provide a heat insulating composite panel which generates no water absorption from the cross-section of the facing material of a panel jointed part by using the water-resistant paper as the facing material and exhibits excellent adhesive force with a concrete and a phenol foam and no decrease in releasing and heat insulating properties for a long period.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a phenol foam composite panel which can be firmly adhered to a wall or ceiling of a building.

[0002]

2. Description of the Related Art As a heat insulating material of this type, JP-A-60-1
Those described in JP-A-51040 and JP-A-63-162230 are known. Further, as a method of improving the adhesive strength with phenol foam, which has been a problem of the face material used in these methods, and providing an inexpensive phenol foam insulation panel without peeling or deterioration of heat insulation performance, at least one side of paper What uses the thing which coat | covered the polymer latex with as a face material is devised.

[0003]

However, as a practical problem, the heat insulating material using the above-mentioned polymer latex coated paper as a face material is, as a practical problem, from the face material cross section of the panel joint portion at the time of concrete driving or GL bond adhesion. Water absorption occurred, and there was a concern that the surface material might be deformed or peeled due to a decrease in strength, and the heat insulating performance might be deteriorated.

In view of the above points, an object of the present invention is to provide a heat insulating panel which does not deteriorate in performance due to concrete driving or GL bond adhesion.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides a water resistant paper coated with a polymer latex on at least one side,
A water-resistant heat-insulating composite panel, characterized in that a polymer latex coated surface is laminated on at least one surface of a phenol foam so that the outer surface thereof is exposed.

The polymer latex referred to in the present invention refers to an emulsion of synthetic rubber and thermoplastic resin produced by emulsion polymerization. Examples thereof include styrene / butadiene latex, acrylic latex, polyvinylidene chloride latex and vinyl acetate latex. In particular, a styrene-butadiene latex and an acrylic latex, which have water resistance, alkali resistance and further excellent adhesion, are preferable.

The waterproof paper referred to in the present invention refers to a sheet in which cellulose fibers are thinly and flatly entangled with each other by adding a sizing agent such as rosin. Water permeability per 1 cm ^2, 1 hour at a gauge pressure of 1 kgf / cm ² is 100 [g / cm ²
It is preferable that it is less than or equal to hr because it has higher water resistance. The adhesiveness between the waterproof paper and the phenol foam is good, and the self-adhesive force of the phenol foam allows for integral molding. In order to obtain a uniform coating layer, solid water resistant paper having a density of 0.5 g / cm ³ or more is preferable, and for example, a water resistant liner is used.

The phenolic foam referred to in the present invention is a resol type phenolic foam, and a foaming agent, a curing agent and, if necessary, other additives are added to a resole type phenolic resin to foam a creamy mixture. It is obtained by curing. The coating of polymer latex on waterproof paper is performed by roll coating, spraying,
It is carried out by a method of drying at a high temperature after applying by a flow coating method or the like. The coating may be on either one side or both sides of the water resistant paper, but since the adhesion between the water resistant paper and concrete is low, it is necessary to make the coated surface the outer surface in contact with the concrete in the case of coating on only one side.

The thickness of the polymer latex coating layer is preferably about 5 μm to 30 μm. If it is less than 5 μm, defects such as pinholes are likely to be formed in the coating layer and the moisture resistance is deteriorated, which is not preferable. If it is 30 μm or more, the cost becomes high, which is not preferable. The coating amount for obtaining a coating layer of 5 μm to 30 μm is 10 g / m ² to 60 g / m ² although it depends on the solid content concentration of the latex and the type of waterproof paper.

In the heat insulating panel of the present invention, a water resistant paper coated with a polymer latex in advance is installed in a mold or a continuous laminator, and the creamy mixture of the above-described resole phenolic resin and various additives is poured into the paper.
Foam and cure in the form or continuous laminator,
It is obtained by integrating phenolic foam and waterproof paper with self-adhesion. If the required performance is not impaired, the phenol foam and the water resistant paper coated with the above polymer latex may be post-bonded with an adhesive.

The heat insulating panel having the structure of the present invention is constructed by a concrete driving method and a concrete driving method used also as a formwork,
It is used for the GL construction method and the construction method combining them. This will be described below with reference to the drawings. FIG. 1 shows that the heat insulating panel of the present invention in which a phenolic foam layer 1 is laminated with water resistant paper 2 coated with latex 3 on one side and another surface material 5 is set inside a form and coated with latex 3. FIG. 4 is a cross-sectional view showing a state in which concrete 4 is driven into the waterproof paper 2 side, the concrete is hardened, the formwork is removed, and the concrete 4 and the heat insulation panel of the present invention are integrated. The face material 5 is appropriately selected from soft face materials and hard face materials. Of course, the waterproof paper 2 coated with the latex 3 may be used.

FIG. 2 shows that the heat insulation panel of the present invention, in which the waterproof paper 2 coated with the latex 3 on one side is laminated on both sides of the phenol foam layer 1, is set in the form,
After the concrete 4 is driven in and the concrete is hardened, the form is removed, the concrete 4 and the heat insulating panel of the present invention are integrated, and further, the interior material 7 and the heat insulating panel of the present invention are integrated via the GL bond 6. It is sectional drawing which shows the state which was made into.

As described above, the heat insulating panel of the present invention provides good adhesion between the face material and the concrete and GL bond, and since the face material is not broken at the interface, it is used for the concrete driving method and the GL method. be able to. Further, if the strength and elastic modulus of the waterproof paper 2 and the face material 5 are set so as to withstand the lateral pressure at the time of concrete driving, the heat insulating panel of the present invention can be used as a formwork and concrete driving method used as a mold at the time of concrete driving. Can also be applied.

[0014]

EXAMPLES The present invention will be described in more detail below with reference to examples. The water permeability described in the following Examples and Comparative Examples means that the gauge pressure of the paper before latex coating is 1 kgf / c.
a water permeation amount per 1 cm ^2, 1 hour in m ^2.

[0015]

Example 1 Water-resistant paper (SPK liner manufactured by Honshu Paper Co., Ltd. density: 0.7 g / cm ³ , water permeability: 25 g / cm ² · h
r, basis weight; 320 g / m ² ) 10 g of acrylic polymer latex (Polytron manufactured by Asahi Kasei Corporation) on one side
/ M ² was applied to produce a face material A was dried for 20 minutes at 80 ° C.. The obtained face material A was cut into 100 cm in length and width, and a stainless steel mold (inside dimension, 100 c in length and width)
The latex coat surface is placed on the bottom of m) and the mold is heated to 70 ° C. in advance, and 100 parts by weight of the resol-type phenol resin is treated with a silicone-based surfactant as a foam stabilizer. 2 parts by weight, HCFC-1 as a foaming agent
12 parts by weight of 23 and 15 parts by weight of phenolsulfonic acid as a curing agent were added, and the mixture was stirred for 30 seconds with a mixer, and the obtained creamy mixture was poured thereon.
Face material A so that the latex-coated surface faces the side opposite to the phenol layer through a spacer so that the thickness is mm.
Is fixed with an upper lid made of stainless steel, and is heated and foamed and cured by a hot press (high-temperature and high-pressure molding apparatus) set at 80 ° C. for 10 minutes. After curing, it was released from the mold and cut into 90 cm each in length and width to obtain a phenol foam insulating composite panel in which the latex coated surfaces were laminated with both outer surfaces facing each other.

[0016]

[Comparative Example 1] Regular paper (K liner manufactured by Honshu Paper Co., Ltd. density;
0.7 g / cm ³ , water permeability; 1000 g / cm ² · h
r, basis weight; 320 g / m ² ) 10 g of acrylic polymer latex (Polytron manufactured by Asahi Kasei Corporation) on one side
/ M ^{2 and then} dried at 80 ° C. for 20 minutes to prepare a face material B. Using the obtained face material B, a phenol foam heat insulating composite panel was obtained in which the latex-coated surfaces were laminated with the latex-coated surfaces facing both outer surfaces in the same procedure as in Example 1.

The phenol foam insulating composite panels of Examples and Comparative Examples were set in the vertical direction by placing 3 sheets each (width 90 cm, height 270 cm) inside the formwork, and driving concrete into a thickness of 15 cm and curing for 28 days. The rear formwork was removed to obtain a concrete board having the panel.
In order to check the adhesive strength between the concrete and panel joints of the obtained concrete plate, coring is performed so that the coring cutter (diameter 5 cm) reaches the concrete layer, and the coring part is pulled to check the strength at which breakage occurs. The measurement and the observation of where the fracture site was were performed. Moreover, the appearance after concrete was poured was observed.
The results are shown in Table 1.

[0018]

[Table 1]

In the panel of Comparative Example 1 as well, the same concrete adhesive strength as in Example 1 can be obtained at portions other than the concrete and the joint portion of the panel, but water absorption from the cross section of the face material occurs near the joint portion of the panel, The strength of the material decreased, the surface material itself was destroyed, and peeling occurred at the surface material portion. In Example 1 in which the waterproof paper coated with polymer latex was used, sufficient concrete adhesion and waterproofness were obtained even in the panel joint portion, and peeling did not occur.

[0020]

EFFECTS OF THE INVENTION The heat insulating panel of the present invention has the above-mentioned structure and has an excellent waterproofing property without the destruction of the face material due to the penetration of water due to the concrete pouring or the GL bond adhesion. Therefore, the thermal insulation performance can be maintained for a long period of time. Also, the adhesion between the face material and the base material, phenolic foam, is good.

Furthermore, when the heat insulating panel of the present invention is used in combination with other surface materials or is constructed by the concrete driving method or the GL method, the surface material of the heat insulating panel of the present invention is concrete, mortar, GL. It has a large adhesive force with a bond or the like, does not cause a problem of peeling for a long period of time, and does not deteriorate the heat insulating performance by water due to the use of concrete, mortar or GL bond.

[Brief description of drawings]

FIG. 1 is a sectional view of a heat insulating panel of the present invention applied to a concrete driving method.

FIG. 2 is a cross-sectional view when the heat insulation panel of the present invention is applied to a concrete driving method and a GL method.

[Explanation of symbols]

 1 Phenol foam 2 Water resistant paper 3 Polymer latex layer 4 Concrete 5 Other surface materials 6 GL bond 7 Interior materials

Claims (1)

[Claims] 1. A water-resistant heat-insulating composite panel, characterized in that a water-resistant paper coated with polymer latex on at least one surface is laminated on at least one surface of phenol foam with the polymer latex-coated surface exposed on the outer surface.