JP2023023127A - Heat-insulation structure for high-humidity environment structure - Google Patents
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- 238000009413 insulation Methods 0.000 title claims abstract description 12
- 239000006260 foam Substances 0.000 claims abstract description 24
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000035699 permeability Effects 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 8
- 230000000996 additive effect Effects 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims abstract description 5
- 229920001228 polyisocyanate Polymers 0.000 claims abstract description 5
- 239000005056 polyisocyanate Substances 0.000 claims abstract description 5
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229920000388 Polyphosphate Polymers 0.000 claims abstract description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000003054 catalyst Substances 0.000 claims abstract description 4
- 235000011180 diphosphates Nutrition 0.000 claims abstract description 4
- -1 ester polyol compound Chemical class 0.000 claims abstract description 4
- 150000004712 monophosphates Chemical class 0.000 claims abstract description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 4
- 239000010452 phosphate Substances 0.000 claims abstract description 4
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229920005862 polyol Polymers 0.000 claims abstract description 4
- 239000001205 polyphosphate Substances 0.000 claims abstract description 4
- 235000011176 polyphosphates Nutrition 0.000 claims abstract description 4
- 239000003381 stabilizer Substances 0.000 claims abstract description 4
- 238000005829 trimerization reaction Methods 0.000 claims abstract description 4
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 claims abstract description 3
- ACVYVLVWPXVTIT-UHFFFAOYSA-M phosphinate Chemical compound [O-][PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-M 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 30
- 239000004088 foaming agent Substances 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims description 3
- 229920002323 Silicone foam Polymers 0.000 claims description 2
- 239000013514 silicone foam Substances 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052710 silicon Inorganic materials 0.000 abstract description 2
- 239000010703 silicon Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000000463 material Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000001035 drying Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- XULSCZPZVQIMFM-IPZQJPLYSA-N odevixibat Chemical compound C12=CC(SC)=C(OCC(=O)N[C@@H](C(=O)N[C@@H](CC)C(O)=O)C=3C=CC(O)=CC=3)C=C2S(=O)(=O)NC(CCCC)(CCCC)CN1C1=CC=CC=C1 XULSCZPZVQIMFM-IPZQJPLYSA-N 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical class O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Abstract
Description
本発明は、地下ピット、サウナ、風呂場等の高湿度環境下にある構造物における断熱構造に関する。 TECHNICAL FIELD The present invention relates to a heat insulating structure for structures in high-humidity environments such as underground pits, saunas, and bathrooms.
高湿度環境下にある構造物の一例として、例えば免震構造の確保や配管等のメンテナンスの為に構造物の地下に確保する空間である地下ピットがある。
この地下ピットに形成する断熱層として現場発泡式のウレタンフォームを用いる場合、当該ウレタンフォームが難燃性に乏しい場合には、吹付施工後のウレタンフォームの表面に、下記の非特許文献１等に記載された耐火コートを塗布する方法が行われている。
An example of a structure in a high-humidity environment is an underground pit, which is a space secured below the structure for securing a seismic isolation structure and maintaining pipes and the like.
When using an on-site foaming type urethane foam as a heat insulating layer to be formed in the underground pit, if the urethane foam is poor in flame retardancy, the surface of the urethane foam after spraying can be coated with the following
上記の方法を用いた場合、以下の問題のうち少なくとも何れか１つの問題が生ずる。
（１）耐火コートの塗布作業や、当該塗布作業に先立って行うプライマーの塗布作業等の分だけ工期を要することになる。
（２）高湿度または水に濡れやすい環境下にある躯体上にウレタンフォームを形成する場合、ウレタンフォームに吸湿または吸水箇所の発生によってウレタンフォームが躯体等から脱落しやすくなる。
At least one of the following problems arises when using the above method.
(1) The time required for applying the fireproof coating and for applying the primer prior to the application work is increased.
(2) When urethane foam is formed on a building frame in a highly humid or water-prone environment, the urethane foam tends to fall off from the building body due to moisture absorption or water absorption.
よって、本発明は、高湿度または水に濡れやすい環境である地下ピットやサウナ、風呂場等の湿気の多い場所である高湿度環境構造物での使用に好適な断熱構造の提供を目的とするものである。 Therefore, an object of the present invention is to provide a heat insulating structure suitable for use in high-humidity environmental structures such as underground pits, saunas, bathrooms, etc., which are environments with high humidity or easily wet with water. It is a thing.
上記課題を解決すべくなされた本願発明は、地下ピット、サウナまたは風呂場等の高湿度環境下にある構造物における断熱構造であって、前記構造物の躯体表面に対し、現場吹き付け式のウレタンフォームのみからなり、前記躯体側にプライマー層を有さず、かつ屋内側に耐火コート層を有しない断熱層を設けてあり、前記断熱層が、ポリイソシアネート化合物、エステル系ポリオール化合物、三量化触媒、添加剤、発泡剤およびアクリル系表面調整剤を少なくとも含み、かつシリコン系整泡剤を含まないものであり、さらに前記添加剤が、赤リンを必須成分とし、且つ、リン酸塩、亜リン酸塩、次亜リン酸塩、モノリン酸塩、ピロリン酸塩およびポリリン酸塩の中から一種以上を少なくとも含んでなり、前記ウレタンフォームが、ＪＩＳＡ９５２６Ａ種２Ｈに属する透湿性を有し、ＩＳＯ－５６６０に準拠した発熱性試験において少なくとも準不燃性を有し、かつ、独立気泡率が８０％以上であることを特徴とするものである。 The present invention, which has been made to solve the above problems, is a heat insulating structure in a structure in a high humidity environment such as an underground pit, a sauna, or a bathroom, in which urethane is applied to the skeleton surface of the structure by on-site spraying. A heat insulating layer made only of foam and having no primer layer on the building frame side and no fireproof coating layer on the indoor side is provided, and the heat insulating layer comprises a polyisocyanate compound, an ester polyol compound, and a trimerization catalyst. , an additive, a foaming agent, and an acrylic surface conditioner, and does not contain a silicone foam stabilizer, and the additive contains red phosphorus as an essential component, and phosphate and phosphite containing at least one or more selected from acid salts, hypophosphites, monophosphates, pyrophosphates and polyphosphates; It is characterized by having at least quasi-noncombustibility in an exothermic test according to , and having a closed cell ratio of 80% or more.
本発明によれば、以下に記載する効果のうち、少なくとも何れか１つの効果を奏する。
（１）本発明に係る断熱層の形成工程のみで難燃性を付与できることから、耐火コートやプライマーの塗布作業が不要となり、工期の短縮化に寄与する。
（２）ウレタンフォームが良好な耐湿（透湿）性を有し、自然乾燥に優れるため、断熱層の内部や表面に結露が発生しにくく、躯体から断熱層が脱落する恐れを抑制できる。
According to the present invention, at least one of the effects described below can be obtained.
(1) Since flame retardance can be imparted only by the process of forming the heat insulating layer according to the present invention, there is no need to apply a fireproof coat or primer, which contributes to shortening the construction period.
(2) Since urethane foam has good moisture resistance (moisture permeability) and is excellent in natural drying, dew condensation is less likely to occur inside and on the surface of the heat insulating layer, and the possibility of the heat insulating layer falling off from the frame can be suppressed.
以下、図面を参照しながら、本発明の実施例について説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
＜１＞全体構成
本実施例に係る断熱構造は、高湿度環境構造物の一例である地下ピットＡを構成するコンクリート製の躯体Ｂに設けた断熱層１０を有している。
図１では、断熱層１０の躯体Ｂ側にプライマー層を有さない構成とし、かつ断熱層の屋内側に耐火コート層を有しない構成としている。
なお、断熱層１０の屋内側には適宜内装材などを設けることができるが、本図では図示を省略している。
以下、断熱層１０の詳細について説明する。
<1> Overall Configuration The heat insulating structure according to this embodiment has a heat insulating layer 10 provided on a concrete frame B that constitutes an underground pit A, which is an example of a high-humidity environmental structure.
In FIG. 1, the heat insulating layer 10 has no primer layer on the building body B side, and the heat insulating layer does not have a fireproof coating layer on the indoor side.
An interior material or the like can be appropriately provided on the indoor side of the heat insulating layer 10, but illustration thereof is omitted in this figure.
Details of the heat insulating layer 10 will be described below.
＜２＞断熱層（図１）
断熱層１０は、躯体Ｂの屋内側表面に形成する、断熱性能を有する層である。
断熱層１０は、現場吹き付け式のウレタンフォームで構成しており、当該ウレタンフォームを、ポリイソシアネート化合物、エステル系ポリオール化合物、三量化触媒、添加剤、発泡剤およびアクリル系表面調整剤を少なくとも含み、かつシリコン系整泡剤を含まないものであり、さらに前記添加剤が、赤リンを必須成分とし、且つ、リン酸塩、亜リン酸塩、次亜リン酸塩、モノリン酸塩、ピロリン酸塩およびポリリン酸塩の中から一種以上を少なくとも含んでなる、組成物で構成する。
上記の組成物を、ポリイソシアネート化合物（第１液）とそれ以外との成分（第２液）とに分けておき、両者を噴霧しながら混合して吹き付ける方法や、両者を混合しながら吹き付ける方法等によって、断熱層を形成することができる。
断熱層１０の厚さ（ｔ１）は特段限定しないが、通常１５ｍｍ～３００ｍｍの範囲で設計される。
<2> Thermal insulation layer (Fig. 1)
The heat insulating layer 10 is a layer having heat insulating performance, which is formed on the surface of the building body B on the indoor side.
The heat insulating layer 10 is composed of a spray-on-site urethane foam, and the urethane foam contains at least a polyisocyanate compound, an ester polyol compound, a trimerization catalyst, an additive, a foaming agent, and an acrylic surface conditioner, and does not contain a silicon-based foam stabilizer, and the additive contains red phosphorus as an essential component, and a phosphate, a phosphite, a hypophosphite, a monophosphate, a pyrophosphate and polyphosphate.
A method in which the above composition is divided into a polyisocyanate compound (first liquid) and other components (second liquid), and the two are mixed and sprayed while being sprayed, or both are mixed and sprayed. etc., a heat insulating layer can be formed.
Although the thickness (t 1 ) of the heat insulating layer 10 is not particularly limited, it is usually designed in the range of 15 mm to 300 mm.
＜２．１＞断熱層の材料について
なお、断熱層１０を構成する各材料の詳細については、特許第６７２５６０６号に開示されている内容から適宜選択すればよく、詳細な説明は省略する。
<2.1> Material of Thermal Insulation Layer Details of each material constituting the thermal insulation layer 10 may be appropriately selected from the contents disclosed in Japanese Patent No. 6725606, and detailed description thereof will be omitted.
＜２．２＞断熱層の不燃性能について
前記の組成によって得られる発泡体は、以下の表１に示すＩＳＯ－５６６０に準拠した発熱性試験において少なくとも準不燃性を有するものとすることが好ましい。
［表１］
[Table 1]
＜２．３＞断熱層の透湿性能について
また、前記の組成によって得られる発泡体は、ＪＩＳＡ９５２６Ａ種２Ｈに属する透湿性（透湿率が４．５［ｎｇ／（ｍ・ｓ・ｐａ）］以下）を有するものとする。
上記した透湿性を有するための各材料の最適な配合比は、実験によって適宜導けば良いが材料の混合状態が良く、汎用な設備が使用できる１：１が望ましい。また、独立気泡率も透湿性が小さいものが得られやすい８０％以上、更には９０％以上のものが望ましい。。
<2.3> Moisture Permeability of Thermal Insulation Layer The foam obtained with the above composition has moisture permeability belonging to JISA9526A type 2H (moisture permeability of 4.5 [ng/(m s pa)] below).
The optimum compounding ratio of each material for having the above-described moisture permeability may be appropriately determined by experiments, but is preferably 1:1 because the mixing state of the materials is good and general-purpose equipment can be used. In addition, the closed cell ratio is preferably 80% or more, more preferably 90% or more, so that a low moisture permeability can be easily obtained. .
＜２．４＞断熱層の密度について
さらに、前記の組成によって得られる発泡体は、密度が２５ｋｇ／ｍ３以上を有するものとする。
上記した密度を有するための各材料の最適な配合比は、実験によって適宜導けば良いが、特に、現場発泡式吹付け設備で多い第１液と第２液の容積比１：１で設けることにより、良好な密度を得ることができる。
また、断熱層１０は吹付けの積層によって形成されるが積層回数が多いほうが密度は高くなり透湿性は小さくなり、１層当たりの吹付け厚みは５０ｍｍ以下、更に好ましくは３０ｍｍ以下で積層することが望ましい。
<2.4> Regarding Density of Heat Insulating Layer Further, the foam obtained with the above composition shall have a density of 25 kg/m 3 or more.
The optimum compounding ratio of each material for having the above-mentioned density can be appropriately derived by experiments, but in particular, the volume ratio of the first liquid to the second liquid, which is often used in on-site foaming spray equipment, should be 1:1. good density can be obtained.
In addition, the heat insulating layer 10 is formed by lamination by spraying, and the higher the number of lamination, the higher the density and the lower the moisture permeability. is desirable.
＜３＞性能試験
以下、本発明に係る断熱構造の性能試験について説明する。
<3> Performance test Hereinafter, a performance test of the heat insulating structure according to the present invention will be described.
＜３．１＞試験材料
本発明に係る断熱層として用いるウレタンフォームからなる実施例１およびその他の従来技術によるウレタンフォームからなる比較例１について各種試験を行った。
実施例１および比較例１で使用した各成分の施工条件は次の通りである。
<3.1> Test Materials Various tests were conducted on Example 1 made of urethane foam used as the heat insulating layer according to the present invention and Comparative Example 1 made of urethane foam according to other conventional techniques.
The construction conditions for each component used in Example 1 and Comparative Example 1 are as follows.
［表１］
＜３．２＞重量変化率について
各試験体を２日間水中に浸漬後、２３℃．５０％ＲＨ下に放置した際の重量変化率を以下の表２および図２に示す。
[表２]
[Table 2]
＜３．３＞熱伝導率について
次に、吸水前と、吸水乾燥後の各試験体についての熱伝導率の対比結果を以下の表３に示す。
[表３]
これは本発明に係る発泡体が、独立気泡構造（独立気泡率：８０％以上）の為、発泡体の表面から水との接触によって吸水するものの、水と接触しない環境になればすぐ乾燥し、吸水乾燥後にも、発泡体内の気泡中に閉じ込められた発泡剤が維持されているためと考えられる。
<3.3> Regarding Thermal Conductivity Table 3 below shows the results of comparison of the thermal conductivity of each specimen before water absorption and after water absorption and drying.
[Table 3]
This is because the foam according to the present invention has a closed cell structure (closed cell ratio: 80% or more), so it absorbs water from the surface of the foam when it comes into contact with water, but it dries quickly in an environment where it does not come into contact with water. This is probably because the foaming agent trapped in the cells in the foam is maintained even after water absorption and drying.
１０ 断熱層
Ａ 地下ピット
Ｂ 躯体
10 Thermal insulation layer A Underground pit B Frame
Claims (1)
前記構造物の躯体表面に対し、現場吹き付け式のウレタンフォームのみからなり、前記躯体側にプライマー層を有さず、かつ屋内側に耐火コート層を有しない断熱層を設けてあり、
前記断熱層が、
ポリイソシアネート化合物、エステル系ポリオール化合物、三量化触媒、添加剤、発泡剤およびアクリル系表面調整剤を少なくとも含み、かつシリコン系整泡剤を含まないものであり、さらに前記添加剤が、赤リンを必須成分とし、且つ、リン酸塩、亜リン酸塩、次亜リン酸塩、モノリン酸塩、ピロリン酸塩およびポリリン酸塩の中から一種以上を少なくとも含んでなり、
前記ウレタンフォームが、ＪＩＳＡ９５２６Ａ種２Ｈに属する透湿性を有し、ＩＳＯ－５６６０に準拠した発熱性試験において少なくとも準不燃性を有し、かつ、独立気泡率が８０％以上であることを特徴とする、
高湿度環境構造物の断熱構造。 A heat insulating structure in a structure in a high humidity environment such as an underground pit, sauna or bathroom,
A heat insulating layer made of only on-site spray-type urethane foam is provided on the skeleton surface of the structure, and has no primer layer on the skeleton side and no fireproof coating layer on the indoor side,
The heat insulating layer is
It contains at least a polyisocyanate compound, an ester polyol compound, a trimerization catalyst, an additive, a foaming agent and an acrylic surface conditioner, and does not contain a silicone foam stabilizer, and the additive contains red phosphorus. containing at least one or more of phosphate, phosphite, hypophosphite, monophosphate, pyrophosphate and polyphosphate as an essential ingredient,
The urethane foam has moisture permeability belonging to JISA9526A type 2H, has at least semi-noncombustibility in an exothermic test based on ISO-5660, and has a closed cell rate of 80% or more. ,
Insulation structure for high humidity environment structures.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63258791A (en) * | 1987-03-13 | 1988-10-26 | 東邦パ−ライト株式会社 | Heat-accumulating layer and execution method thereof |
| JPH0598692A (en) * | 1991-10-04 | 1993-04-20 | Shimizu Corp | Construction method for heat storage tank and composite panel therefor |
| JP6725606B2 (en) * | 2018-08-30 | 2020-07-22 | 株式会社日本アクア | Urethane resin composition and method for heat insulation of building |
-
2021
- 2021-08-04 JP JP2021128362A patent/JP7321219B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63258791A (en) * | 1987-03-13 | 1988-10-26 | 東邦パ−ライト株式会社 | Heat-accumulating layer and execution method thereof |
| JPH0598692A (en) * | 1991-10-04 | 1993-04-20 | Shimizu Corp | Construction method for heat storage tank and composite panel therefor |
| JP6725606B2 (en) * | 2018-08-30 | 2020-07-22 | 株式会社日本アクア | Urethane resin composition and method for heat insulation of building |
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| JP7321219B2 (en) | 2023-08-04 |
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