JPH036299B2 - - Google Patents
Info
- Publication number
- JPH036299B2 JPH036299B2 JP62271642A JP27164287A JPH036299B2 JP H036299 B2 JPH036299 B2 JP H036299B2 JP 62271642 A JP62271642 A JP 62271642A JP 27164287 A JP27164287 A JP 27164287A JP H036299 B2 JPH036299 B2 JP H036299B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- waterproof
- rubber composition
- waterproof sheet
- agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000007788 liquid Substances 0.000 claims description 59
- 239000000203 mixture Substances 0.000 claims description 42
- 229920001971 elastomer Polymers 0.000 claims description 31
- 239000005060 rubber Substances 0.000 claims description 31
- 239000003795 chemical substances by application Substances 0.000 claims description 28
- 239000005062 Polybutadiene Substances 0.000 claims description 26
- 229920002857 polybutadiene Polymers 0.000 claims description 26
- 239000010410 layer Substances 0.000 claims description 23
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 13
- 239000011247 coating layer Substances 0.000 claims description 11
- 239000012948 isocyanate Substances 0.000 claims description 10
- -1 isocyanate compound Chemical class 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 7
- 239000002075 main ingredient Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000010073 coating (rubber) Methods 0.000 claims description 4
- 150000002513 isocyanates Chemical class 0.000 claims description 2
- 239000010426 asphalt Substances 0.000 description 17
- 238000000576 coating method Methods 0.000 description 17
- 239000011248 coating agent Substances 0.000 description 16
- 238000004078 waterproofing Methods 0.000 description 16
- 238000010276 construction Methods 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 13
- 238000002156 mixing Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 9
- 230000000704 physical effect Effects 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
- 239000010734 process oil Substances 0.000 description 4
- 239000011162 core material Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002480 mineral oil Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 239000012975 dibutyltin dilaurate Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920001451 polypropylene glycol Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- FKOMNQCOHKHUCP-UHFFFAOYSA-N 1-[n-(2-hydroxypropyl)anilino]propan-2-ol Chemical compound CC(O)CN(CC(C)O)C1=CC=CC=C1 FKOMNQCOHKHUCP-UHFFFAOYSA-N 0.000 description 1
- ZNZCBZJTANSNGL-UHFFFAOYSA-N 1-n,2-n-diphenylbenzene-1,2-diamine Chemical compound C=1C=CC=C(NC=2C=CC=CC=2)C=1NC1=CC=CC=C1 ZNZCBZJTANSNGL-UHFFFAOYSA-N 0.000 description 1
- XOUQAVYLRNOXDO-UHFFFAOYSA-N 2-tert-butyl-5-methylphenol Chemical compound CC1=CC=C(C(C)(C)C)C(O)=C1 XOUQAVYLRNOXDO-UHFFFAOYSA-N 0.000 description 1
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 1
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 description 1
- QORUGOXNWQUALA-UHFFFAOYSA-N N=C=O.N=C=O.N=C=O.C1=CC=C(C(C2=CC=CC=C2)C2=CC=CC=C2)C=C1 Chemical compound N=C=O.N=C=O.N=C=O.C1=CC=C(C(C2=CC=CC=C2)C2=CC=CC=C2)C=C1 QORUGOXNWQUALA-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- MMMNTDFSPSQXJP-UHFFFAOYSA-N orphenadrine citrate Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O.C=1C=CC=C(C)C=1C(OCCN(C)C)C1=CC=CC=C1 MMMNTDFSPSQXJP-UHFFFAOYSA-N 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229940054541 urex Drugs 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Description
［産業上の利用分野］
本発明は、建造物の防水施工法に関し、更に詳
しくは、特定の液状組成物より成る塗膜と防水シ
ートからなる防水層の施工方法に関するものであ
る。
［従来の技術、発明が解決しようとする問題点］
従来、建造物の防水施工法には、液状組成物を
建造物下地表面に塗布し、その乾燥又は硬化によ
つて塗膜を形成せしめる塗膜防水施工法、工場で
成型されたシートを接着剤で下地表面に貼着する
シート防水施工法、アスフアルトを直接加熱し、
流動性を持たせて施工するアスフアルト施工法等
がある。
これらの防水施工法のうち、塗膜防水施工法と
シート防水施工法には一長一短があり、例えば前
者の場合、作業性が容易で複雑な施工面に対して
も適用が容易である等の長所がある反面、下地不
陸などにより塗膜厚が極端に薄い箇所を生じ、下
地に亀裂が発生した場合、該部位から塗膜が破断
し、単層の為漏水に直結するなどの欠点を有して
いる。一方、シート防水施工法の場合は、成型シ
ートを用いるため、均一な厚みの防水層が得られ
るが、比較的厚さが薄く、傷がつき易いなどの問
題があり、下地に対してかなり厳密な平滑度が要
求される。
又、アスフアルト防水施工法は、加熱溶融に伴
う火災発生の危険、火傷及び臭気等作業上問題が
あり、又防水層の伸び能力が小さく、亀裂などの
下地の欠陥によつて損傷を受け易い等の欠点があ
る。
［問題点を解決するための手段］
本発明者等は、かかる従来技術の欠点を改良
し、作業性にすぐれ、且つ防水性能にすぐれた防
水施工法について、広範囲に亘る系統的研究を行
つた結果、分子鎖末端に水酸基を有する液状ポリ
ブタジエンおよびアスフアルト類を主剤とするＡ
剤と分子鎖末端に水酸基を有する液状ポリブタジ
エンにイソシアナート化合物を過剰に反応せしめ
て得られる分子鎖末端にイソシアナート基を有す
るプレポリマーを主剤とするＢ剤とからなる液状
ゴム組成物の塗膜と防水シートとを組合せて複合
防水層を形成することによつて目的を達成できる
ことを見出し、本発明を完成した。
すなわち本発明は、下地面に、分子鎖末端に水
酸基を有する液状ポリブタジエンおよびアスフア
ルト類を主剤とするＡ剤と分子鎖末端に水酸基を
有する液状ポリブタジエンにイソシアナート化合
物を過剰に反応せしめて得られる分子鎖末端にイ
ソシアナート基を有するプレポリマーを主剤とす
るＢ剤とからなる液状ゴム組成物を塗布し、その
硬化前に塗布面に分子鎖末端に水酸基を有する液
状ポリブタジエンを基材とする防水シートを敷設
し、しかる後前記液状ゴム組成物を硬化せしめて
硬化ゴム塗膜層と防水シートで複合防水層を形成
することを特徴とする防水施工法に関する。
本発明で用いる液状ゴム組成物は、上記の如
く、Ａ剤とＢ剤とからなる二液硬化型の液状組成
物である。Ａ剤における分子末端に水酸基を有す
る液状ポリブタジエンとは、室温で流動性があ
り、分子末端に水酸基を有し、硬化処理によつて
三次元網目構造を形成するポリブタジエンであ
る。本発明に好適に用いられるものは平均分子量
500〜8000のポリブタジエン、ブタジエン／アク
リロニトリル共重合体、ブタジエン／スチレン共
重合体などである。また、液状ポリブタジエンの
一部、たとえば30重量％以下をポリエーテル系ポ
リオールあるいはポリエステル系ポリオールなど
の架橋性重合体で置き換えることもできる。次
に、アスフアルト類としてはストレートアスフア
ルト、ブローンアスフアルトなどがあり、上記液
状ポリブタジエン100重量部に対して通常50〜500
重量部の割合で配合する。アスフアルト類の配合
量を、硬化ゴム塗膜層の物性を大きく損なわない
範囲で可及的に多くすることは本発明方法のコス
トを低減するために役立つ。しかも、上記液状ポ
リブタジエンは、二液硬化型ウレタン樹脂等の従
来の塗膜防水剤に比し、アスフアルト類との相溶
性に富むので、施工後もアスフアルト類のブリー
ドが生ずるおそれはない。
Ａ剤の主剤は上記２成分であるが、必要に応じ
て炭酸カルシウム、タルク、カーボンブラツク、
ホワイトカーボン等の充填材や芳香族プロセスオ
イル、ナフテン系プロセスオイル、パラフイン系
プロセスオイル等の鉱物油、Ｎ−フエニルナフチ
ルアミン、ジフエニルフエニレンジアミン、４，
4′−チオビス（３−メチル−６−ｔ−ブチルフエ
ノール）等の老化防止剤などを適宜加えることが
できる。充填材を配合する場合、その配合量は液
状ポリブタジエン100重量部に対し100〜300重量
部が適当であり、充填材の配合により塗膜の物
性、特に機械的強度の向上が期待される。また、
鉱物油を配合する場合は、Ａ剤の粘性あるいは塗
膜物性等の点から、たとえば液状ポリブタジエン
100重量部とアスフアルト類100重量部からなるも
のに対して20〜200重量部、好ましくは40〜150重
量部の範囲で配合するのがよい。
次に、Ｂ剤は分子鎖末端に水酸基を有する液状
ポリブタジエンにイソシアナート化合物を過剰に
反応せしめて得られる分子鎖末端にイソシアナー
ト基を有するプレポリマーを主剤とする架橋剤で
あり、Ａ剤と同様に常温で流動性を有するものが
用いられる。
Ｂ剤における分子鎖末端に水酸基を有する液状
ポリブタジエンは前記Ａ剤について説明したもの
と同じでよい。
Ｂ剤における前記イソシアナート化合物として
は、たとえばトリレンジイソシアナート、４，
4′−ジフエニルメタンジイソシアナート、ヘキサ
メチレンジイソシアナート、トリフエニルメタン
トリイソシアナートがある。
さらにＢ剤には、必要に応じてジオクチルフタ
レート、ジブチルフタレート、塩化パラフイン等
の希釈剤を適宜配合することができる。
以上のＡ剤とＢ剤を配合して二液混合型液状ゴ
ム組成物を得るに際しては、Ａ剤の液状ポリブタ
ジエンに対してＢ剤の分子鎖末端にイソシアナー
ト基を有するプレポリマーを官能基の当量よりや
や過剰、たとえば液状ポリブタジエンの水酸基
（OH）に対しイソシアナート基（NCO）を
OH：NCO＝１：1.1〜1.3程度となるように配合
する。ポリイソシアナート類の量が少ない場合
は、硬化に長時間を要し、また塗膜の物性も低下
する傾向にあり好ましくない。
液状ゴム組成物の粘度はＡ剤及びＢ剤のそれぞ
れの組成によつて数十cps以上適宜の範囲とする
ことが可能であり、施工対象に応じてそれぞれ最
適のものを選定すればよい。たとえば平場用であ
れば、Ａ剤とＢ剤の配合直後の粘度を8000〜
10000cps（20℃）程度とすれば、配合数時間後も
十分可使粘度域にあつて好都合である。また、立
上り用であれば、同じく配合直後で針入度として
一般に200〜300の範囲となるようにすればよい。
次に、本発明で用いる防水シートは分子鎖末端
に水酸基を有する液状ポリブタジエンを基材とす
るものである。ここで液状ポリブタジエンは前記
Ａ剤について説明したものと同じである。必要に
応じ、該基材にアスフアルト類、鉱物油等を加え
ることもでき、これらも前記Ａ剤について説明し
たものと同じものを使用できる。特に、基材にア
スフアルト類を加えたゴムアスフアルト系防水シ
ートが好適である。さらに、必要に応じて芯材と
して不織布、布、プラスチツクフイルムなどを用
いたり、防水シート下面にフエルトなどを貼り合
せて補強してもよい。好適にはポリエステル不織
布を芯材として用い、あらかじめ基材、アスフア
ルト類および硬化剤を混合し、該混合物を芯材に
塗布もしくは含浸させた防水シートが使用され
る。このようなアスフアルト含有防水シートは前
記液状ゴム組成物との組合せにより優れた防水性
能を示す。ここで硬化剤としては、前記Ｂ剤の分
子鎖末端にイソシアナート基を有するプレポリマ
ーあるいは前記Ｂ剤を得るために用いる前記イソ
シアナート化合物を好適に用いることができる。
以上の如き無溶剤二液硬化型液状ゴム組成物と
防水シートを用いる本発明方法は、まずＡ剤とＢ
剤とを混合撹拌後、得られた液状ゴム組成物を金
鏝、スクイーザーなど適宜の手段を用いて下地表
面に塗布し、次いでその硬化前に塗布面に防水シ
ートを貼着、敷設することによつて行われる。こ
の際、液状ゴム組成物の塗膜厚みは、一般に0.5
mm以上、より好ましくは1.0mm以上とするが、本
発明の液状ゴム組成物によれば、このような塗膜
層としても作業性あるいは塗膜物性の点で何ら支
障を生ずることはなく、さらに該組成物本来の物
性とも相俟つて、塗膜層はそれ自体が良好な防水
層として作用すると共に、下地亀裂に際しての緩
衝層あるいは下地不陸の補償層としても機能し、
防水シートと一体となつて耐久性にすぐれた防水
性能を示す。
又、液状ゴム組成物塗布面への防水シートの貼
着、敷設は、該組成物の硬化前に行われ、この場
合、液状ゴム組成物はその粘接着力によつて防水
シートを容易に固着し、複合防水層を形成する。
防水シートの貼着可能時間は、概ねＡ，Ｂ両剤混
合後常温で約３時間迄の範囲であり、この時間内
で実用上十分なる接着性が得られるが、本発明方
法に於ては、水系或は溶剤系接着剤を用いる場合
のようにオープンタイムをとる必要は何らなく、
又作業効率の観点から云つても、液状ゴム組成物
塗布後直ちに防水シートを貼着するのが一般的で
あり、かつ好ましい方法である。
液状ゴム組成物の硬化は、一般に室温で十分進
行し、室温（20℃）×約７日で硬化はほぼ完結す
るので、施工後特に熱処理等を施すことなく、そ
のまま養生すればよい。
なお、本発明に於ては、防水下地に対し、予め
プライマーを塗布してもよい。
［実施例］
以下、製造例及び実施例により本発明を具体的
に説明する。
参考製造例［液状ゴム組成物の調製］
OH当量0.83meq／ｇの液状ポリブタジエン
（出光石油化学(株)、商品名Poly bd Ｒ−45HT）
100重量部、ストレートアスフアルト（出光興産
(株)、商品名Ａ−80）100重量部、プロセスオイル
（エツソ化学(株)、商品名フレクソン110）100重量
部、ジブチル錫ジラウレート0.02重量部から成る
Ａ剤300ｇに対し、液状MDI（化成アツプジヨン
(株)、商品名Isonate 143L）から成るＢ剤13ｇを
加え、均一に混合して液状ゴム組成物を得た。
製造例１ ［液状ゴム組成物の調製］
参考製造例と同様のＡ剤300ｇに対し、液状ゴ
ムプレポリマー（遊離NCO ９重量％、出光石油
化学(株)、商品名HTP−９）からなるTDI系硬化
剤（Ｂ剤）40ｇを加え、均一に混合して液状ゴム
組成物を得た。
製造例２ ［防水シートの製造］
液状ポリブタジエン（Ｒ−45HT）100重量部、
ストレートアスフアルト（Ａ−80）100重量部、
プロセスオイル（フレクソン110）50重量部、Ｎ，
Ｎ−ビス（２−ヒドロキシプロピル）アニリン15
重量部、ジブチル錫ジラウレート0.02重量部及び
液状MDI（Isonate 143L）33重量部から成る混合
物を急速撹拌後注型し、20℃×20分放置後、100
℃×10分間硬化させて、厚み２mmのシートを作成
した。
製造例２で得られた防水シートの物性、並びに
参考製造例および製造例１の液状ゴム組成物をそ
れぞれガラス１mm厚となるように流延し、20℃×
１週間養生して得られた硬化塗膜の物性を第１表
に一括して示した。
[Industrial Application Field] The present invention relates to a method for waterproofing buildings, and more particularly to a method for constructing a waterproof layer consisting of a coating film made of a specific liquid composition and a waterproof sheet. [Prior Art and Problems to be Solved by the Invention] Conventionally, waterproofing construction methods for buildings include coatings in which a liquid composition is applied to the surface of the building base and a coating film is formed by drying or curing. Membrane waterproofing construction method, sheet waterproofing construction method in which a sheet molded in a factory is attached to the base surface with adhesive, direct heating of asphalt,
There are asphalt construction methods that provide fluidity. Among these waterproofing construction methods, the paint film waterproofing construction method and the sheet waterproofing construction method have advantages and disadvantages; for example, in the case of the former, the advantages include ease of workability and ease of application to complex construction surfaces. On the other hand, if the coating thickness is extremely thin due to uneven groundwork, etc., and cracks occur in the groundwork, the coating film will break from those areas, and because it is a single layer, it will directly lead to water leakage. are doing. On the other hand, in the case of the sheet waterproofing method, a molded sheet is used, so a waterproof layer of uniform thickness can be obtained, but the thickness is relatively thin and there are problems such as being easily scratched. A certain degree of smoothness is required. In addition, the asphalt waterproofing construction method has operational problems such as the risk of fire due to heating and melting, burns, and odor.Also, the waterproof layer has a low elongation ability and is easily damaged by defects in the base such as cracks. There are drawbacks. [Means for Solving the Problems] The present inventors conducted extensive systematic research on a waterproofing method that improves the shortcomings of the prior art and has excellent workability and waterproof performance. As a result, A containing liquid polybutadiene and asphalts having a hydroxyl group at the end of the molecular chain as the main ingredients.
A coating film of a liquid rubber composition consisting of a component B and a prepolymer having an isocyanate group at the end of the molecular chain obtained by reacting an isocyanate compound in excess with a liquid polybutadiene having a hydroxyl group at the end of the molecular chain. The present invention was completed based on the discovery that the object can be achieved by combining the above and a waterproof sheet to form a composite waterproof layer. That is, the present invention provides a molecule obtained by reacting an excessive amount of an isocyanate compound to a liquid polybutadiene having a hydroxyl group at the end of the molecular chain and an agent A mainly composed of asphalts, and a liquid polybutadiene having a hydroxyl group at the end of the molecular chain on the base surface. A waterproof sheet whose base material is liquid polybutadiene having a hydroxyl group at the molecular chain end, by applying a liquid rubber composition consisting of a prepolymer having an isocyanate group at the chain end and a B agent as the main ingredient, and applying the liquid rubber composition to the coated surface before curing. The present invention relates to a waterproof construction method, which comprises: laying the liquid rubber composition, and then curing the liquid rubber composition to form a composite waterproof layer with the cured rubber coating layer and the waterproof sheet. As mentioned above, the liquid rubber composition used in the present invention is a two-component curing type liquid composition consisting of part A and part B. The liquid polybutadiene having a hydroxyl group at the end of the molecule in Agent A is a polybutadiene that is fluid at room temperature, has a hydroxyl group at the end of the molecule, and forms a three-dimensional network structure by curing treatment. Those preferably used in the present invention have an average molecular weight
500-8000 polybutadiene, butadiene/acrylonitrile copolymer, butadiene/styrene copolymer, etc. Further, a part of the liquid polybutadiene, for example 30% by weight or less, can be replaced with a crosslinkable polymer such as a polyether polyol or a polyester polyol. Next, asphalts include straight asphalt, blown asphalt, etc., and usually 50 to 500 parts by weight of the above liquid polybutadiene
Blend in parts by weight. Increasing the amount of asphalt compounded as much as possible without significantly impairing the physical properties of the cured rubber coating layer is useful for reducing the cost of the method of the present invention. Furthermore, the liquid polybutadiene has higher compatibility with asphalts than conventional paint film waterproofing agents such as two-component curable urethane resins, so there is no risk of asphalts bleeding even after construction. The main ingredients of Part A are the above two ingredients, but calcium carbonate, talc, carbon black,
Fillers such as white carbon, mineral oils such as aromatic process oils, naphthenic process oils, paraffinic process oils, N-phenylnaphthylamine, diphenylphenylenediamine, 4,
Antioxidants such as 4'-thiobis(3-methyl-6-t-butylphenol) and the like can be added as appropriate. When a filler is added, the appropriate amount is 100 to 300 parts by weight per 100 parts by weight of liquid polybutadiene, and the addition of the filler is expected to improve the physical properties of the coating film, especially the mechanical strength. Also,
When blending mineral oil, for example, liquid polybutadiene may be
It is preferably blended in an amount of 20 to 200 parts by weight, preferably 40 to 150 parts by weight, based on 100 parts by weight of the asphalt and 100 parts by weight of the asphalt. Next, agent B is a crosslinking agent whose main ingredient is a prepolymer having isocyanate groups at the end of the molecular chain obtained by reacting liquid polybutadiene having a hydroxyl group at the end of the molecular chain in excess with an isocyanate compound. Similarly, those having fluidity at room temperature are used. The liquid polybutadiene having a hydroxyl group at the end of the molecular chain in the B agent may be the same as that described for the A agent. Examples of the isocyanate compound in agent B include tolylene diisocyanate, 4,
These include 4'-diphenylmethane diisocyanate, hexamethylene diisocyanate, and triphenylmethane triisocyanate. Furthermore, a diluent such as dioctyl phthalate, dibutyl phthalate, or chlorinated paraffin can be appropriately blended into the B agent as required. When blending the above A and B parts to obtain a two-component mixed liquid rubber composition, a prepolymer having an isocyanate group at the molecular chain end of the B part is added to the liquid polybutadiene of the A part to form a functional group. A slight excess of the equivalent amount, for example, isocyanate groups (NCO) are added to the hydroxyl groups (OH) of liquid polybutadiene.
Blend so that OH:NCO=1:1.1 to about 1.3. If the amount of polyisocyanate is small, curing takes a long time and the physical properties of the coating film tend to deteriorate, which is not preferable. The viscosity of the liquid rubber composition can be set in an appropriate range of several tens of cps or more depending on the composition of each of Part A and Part B, and the optimum one may be selected depending on the object of construction. For example, for flat use, the viscosity of parts A and B immediately after blending should be 8000~
If it is about 10,000 cps (20°C), it is convenient because the viscosity remains within the usable viscosity range even after several hours of blending. In addition, if it is for start-up use, the penetration may generally be in the range of 200 to 300 immediately after blending. Next, the waterproof sheet used in the present invention is based on liquid polybutadiene having a hydroxyl group at the end of the molecular chain. Here, the liquid polybutadiene is the same as that described for agent A above. If necessary, asphalts, mineral oil, etc. can be added to the base material, and the same ones as described for the above-mentioned A agent can be used. Particularly suitable is a rubber asphalt-based waterproof sheet in which asphalt is added to the base material. Furthermore, if necessary, a nonwoven fabric, cloth, plastic film, etc. may be used as a core material, or felt may be bonded to the lower surface of the waterproof sheet for reinforcement. Preferably, a waterproof sheet is used in which a polyester nonwoven fabric is used as a core material, a base material, an asphalt, and a hardening agent are mixed in advance, and the mixture is applied or impregnated onto the core material. Such an asphalt-containing waterproof sheet exhibits excellent waterproof performance when combined with the liquid rubber composition. Here, as the curing agent, a prepolymer having an isocyanate group at the molecular chain end of the B agent or the isocyanate compound used to obtain the B agent can be suitably used. In the method of the present invention using the above-mentioned solvent-free two-component curing liquid rubber composition and waterproof sheet, first, agent A and agent B
After mixing and stirring, the obtained liquid rubber composition is applied to the base surface using an appropriate means such as a trowel or a squeezer, and then a waterproof sheet is attached and laid on the coated surface before it hardens. It is done by folding. At this time, the coating film thickness of the liquid rubber composition is generally 0.5
mm or more, more preferably 1.0 mm or more, but according to the liquid rubber composition of the present invention, such a coating layer does not cause any problems in terms of workability or coating physical properties; Coupled with the inherent physical properties of the composition, the coating layer itself acts as a good waterproof layer, and also functions as a buffer layer against cracks in the base or a compensation layer for uneven base,
Combined with the tarpaulin sheet, it exhibits highly durable waterproof performance. In addition, the waterproof sheet is attached and placed on the surface coated with the liquid rubber composition before the composition is cured, and in this case, the liquid rubber composition easily fixes the waterproof sheet with its adhesive force. and form a composite waterproof layer.
The adhesion time of the waterproof sheet is generally up to about 3 hours at room temperature after mixing both agents A and B, and a practically sufficient adhesiveness can be obtained within this time, but in the method of the present invention, There is no need for open time like when using water-based or solvent-based adhesives.
Also, from the viewpoint of work efficiency, it is a common and preferred method to apply a waterproof sheet immediately after applying the liquid rubber composition. Curing of a liquid rubber composition generally proceeds sufficiently at room temperature, and curing is almost completed in about 7 days at room temperature (20° C.), so it is sufficient to cure the composition as it is without any particular heat treatment after application. In the present invention, a primer may be applied to the waterproof base in advance. [Examples] Hereinafter, the present invention will be specifically explained using production examples and examples. Reference production example [Preparation of liquid rubber composition] Liquid polybutadiene with an OH equivalent of 0.83 meq/g (Idemitsu Petrochemical Co., Ltd., trade name Poly bd R-45HT)
100 parts by weight, straight asphalt (Idemitsu Kosan)
Liquid MDI (chemical Atupjiyon
13 g of agent B consisting of Isonate 143L (trade name) manufactured by Co., Ltd. was added and mixed uniformly to obtain a liquid rubber composition. Production Example 1 [Preparation of liquid rubber composition] TDI consisting of liquid rubber prepolymer (free NCO 9% by weight, Idemitsu Petrochemical Co., Ltd., trade name HTP-9) was added to 300 g of agent A similar to the reference production example. 40 g of a system curing agent (Agent B) was added and mixed uniformly to obtain a liquid rubber composition. Production Example 2 [Production of waterproof sheet] 100 parts by weight of liquid polybutadiene (R-45HT),
Straight asphalt (A-80) 100 parts by weight,
Process oil (Flexon 110) 50 parts by weight, N,
N-bis(2-hydroxypropyl)aniline 15
After rapid stirring, a mixture consisting of parts by weight, 0.02 parts by weight of dibutyltin dilaurate, and 33 parts by weight of liquid MDI (Isonate 143L) was cast, and after being left at 20°C for 20 minutes,
C. for 10 minutes to create a sheet with a thickness of 2 mm. The physical properties of the waterproof sheet obtained in Production Example 2, as well as the liquid rubber compositions of Reference Production Example and Production Example 1, were cast on glass to a thickness of 1 mm, and heated at 20°C.
The physical properties of the cured coating film obtained after curing for one week are summarized in Table 1.
【表】
参考例
セメント100重量部、川砂200重量部及び水80重
量部の混合物より巾50cm、長さ200cm、厚み10mm
の板状下地を作成した。但し、中央50cm×50cmは
下地裏面に空隙部を形成せしめて厚みを７mmとし
た。
この下地表面に、一液型ウレタンプライマー
（鐘紡合成化学(株)、商品名ベルウレツクスUT）
を200ｇ／m2だけ塗布し、２時間乾燥後、参考製
造例におけるＡ剤とＢ剤とを混合後液状ゴム組成
物を金鏝で塗布し、1.0mmの塗膜を形成した。次
いで、直ちに製造例２で得られた防水シートを上
記塗膜上に貼着し、混合防水層を形成せしめた。
実施例
液状ゴム組成物として製造例１で得られた組成
物を用いるほかは参考例と全く同様にして同じく
複合防水層を得た。
比較例 １
実施例に於て液状ゴム組成物を塗布する代り
に、クロロブレン系溶剤型接着剤（固形分20％）
を0.2Kg／m2の割合で下地及びシート面に塗布し
（合計塗布量0.4Kg／m2）、30分間オープンタイム
をとつて防水シートを接着する以外は、実施例と
同様にして防水層を形成せしめた。
比較例 ２
実施例で用いた下地表面に、実施例と同様の一
液型ウレタンプライマーを塗布し乾燥後、ポリオ
キシプロピレントリオール（平均分子量3000）
300ｇにトリレンジイソシアナート53ｇを反応せ
しめて得られた末端イソシアナートプレポリマー
100ｇと、平均分子量2000のポリオキシプロピレ
ングリコール80ｇ、針入度80／100のストレート
アスフアルト100ｇ、ジブチル錫ジラウレート
0.01ｇの混合物を塗布し、1.0mmの塗膜を形成し
た。次いで、製造例２により得られたシートを上
記塗膜上に貼着した。
以上の参考例、実施例及び比較例１及び２で得
られた防水層の24ケ月後（屋外放置）の状態を第
２表に一括して示した。[Table] Reference example Width 50cm, length 200cm, thickness 10mm from a mixture of 100 parts by weight of cement, 200 parts by weight of river sand, and 80 parts by weight of water.
A plate-like base was created. However, at the center 50 cm x 50 cm, a void was formed on the back side of the base to make the thickness 7 mm. Apply a one-component urethane primer (Kanebo Synthetic Chemical Co., Ltd., trade name: Bell Urex UT) to this base surface.
After drying for 2 hours, the liquid rubber composition was applied with a metal trowel after mixing Part A and Part B in the reference production example to form a coating film of 1.0 mm. Next, the waterproof sheet obtained in Production Example 2 was immediately adhered onto the above coating film to form a mixed waterproof layer. Example A composite waterproof layer was obtained in the same manner as in Reference Example except that the composition obtained in Production Example 1 was used as the liquid rubber composition. Comparative Example 1 Instead of applying the liquid rubber composition in the example, a chloroprene solvent-based adhesive (solid content 20%) was used.
The waterproof layer was applied in the same manner as in the example except that the water-proof sheet was applied to the base and sheet surface at a rate of 0.2 kg/m 2 (total application amount 0.4 kg/m 2 ), and the waterproof sheet was adhered after an open time of 30 minutes. was formed. Comparative Example 2 A one-component urethane primer similar to that in the example was applied to the base surface used in the example, and after drying, polyoxypropylene triol (average molecular weight 3000) was applied.
Terminal isocyanate prepolymer obtained by reacting 300g with 53g of tolylene diisocyanate
100 g, 80 g of polyoxypropylene glycol with an average molecular weight of 2000, 100 g of straight asphalt with a penetration of 80/100, and dibutyltin dilaurate.
0.01 g of the mixture was applied to form a 1.0 mm coating. Next, the sheet obtained in Production Example 2 was adhered onto the above coating film. Table 2 shows the conditions of the waterproof layers obtained in the above Reference Examples, Examples, and Comparative Examples 1 and 2 after 24 months (left outdoors).
【表】
第２表の結果から明らかな如く、本発明の複合
防水層では、下地が亀裂しても、塗膜層の緩衝作
用によつて、防水シートは何ら損傷を受けること
なく充分なる防水性が保持される。参考例の防水
工法によるものでは、実施例と同様に下地が亀裂
しても防水シートは損傷を受けないけれども、下
地亀裂上の塗膜層が破断し、防水シートと剥離す
るという欠点がある。これに対し、従来のシート
防水工法（比較例１）によるものでは、防水層に
短期間の内に亀裂が生じて防水性能が極端に低下
し、又本発明の液状ゴム組成物に代えて二液硬化
型ウレタン樹脂を用いた比較例２の場合は、防水
シートに亀裂は生じないものの、該ウレタン樹脂
とアスフアルトの混和性が不良な為、シート表面
にアスフアルト分がブリードして実際上使用に耐
えないものとなる。
［発明の効果］
本発明により特定のＡ剤とＢ剤からなる塗膜層
と防水シートを組合せて形成される複合防水層は
極めて防水性能にすぐれており、しかも下地の亀
裂に対しても追従性があり、長期間にわたつて十
分な防水性が保持される。また、本発明の防水施
工法は作業性にすぐれている。さらに、本発明に
よつて奏される効果を以下に示す。
防水下地に多少の不陸箇所があつて塗膜厚の
極端に薄い箇所を生じても、上層の防水シート
により防水性は保たれる。
防水下地に凹凸があつても、硬化ゴム塗膜層
を形成することにより防水シートに傷が入るこ
とがなく、従来の防水シート工法の場合のよう
な下地の厳密な平滑度を必要としない。
無溶剤２液硬化型液状ゴム組成物を塗膜とし
て塗布する為、塗布後直ちに防水シートを貼着
することが可能であり、特に他の接着剤を必要
としないばかりでなく、従来の防水シート工法
の場合のように両面接着は必要でなく、又オー
プンタイムを要さず、作業性改善につながる。
塗膜層は、上層防水シートの緩衝層として働
く為、下地に亀裂を生じても防水シートは破断
しない。
液状ゴムはアスフアルト類との相溶性にすぐ
れ、従つてアスフアルト類を併用した場合にも
そのブリードによる防水層の経時的劣化がな
く、耐久性にすぐれた防水層を、しかもより工
業的有利に形成せしめることが可能である。
火気、溶剤等を使用しないため極めて作業性
が良い。
Ｂ剤としてイソシアナート基を有するプレポリ
マーを用いずにジフエニルメタンジイソシアナー
トなどの比較的低分子量のイソシアネート化合物
を用いた場合と比較して、本発明によつて奏され
る効果を示すと次のとおりである。
プレポリマー自体が比較的分子量の大きな液
状ポリブタジエンから形成されたポリマーであ
るため、分子量の比較的大きな液状ポリブタジ
エン硬化物が容易に得られ、伸度の大きな塗膜
層が容易に得られる。
プレポリマーの分子量が比較的大きいので、
その揮発性がほとんどないから、防水施工時の
作業がより安全となり、環境衛生上も好まし
い。
塗膜防水層の形成はＢ剤のプレポリマーとＡ
剤の液状ポリブタジエンとをイソシアネート基
の方をやや過剰に混合して通常おこなうが、こ
の混合割合の調整が容易である。
イソアネート化合物は分子量が小さいと、わ
ずかの混合重量の変化によつてイソシアネート
基の量が変化してしまうので、厳密な混合割合
の管理をおこなう必要があるが、プレポリマー
の場合は分子量が比較的大きいので、それだけ
混合時の許容誤差範囲が大きくなるからであ
る。[Table] As is clear from the results in Table 2, in the composite waterproof layer of the present invention, even if the base cracks, the waterproof sheet remains sufficiently waterproof without any damage due to the buffering effect of the coating layer. Gender is preserved. In the waterproofing method of the reference example, although the waterproof sheet is not damaged even if the base cracks as in the example, there is a drawback that the coating layer on the base cracks breaks and peels off from the waterproof sheet. On the other hand, when using the conventional sheet waterproofing method (Comparative Example 1), cracks appeared in the waterproof layer within a short period of time, resulting in an extremely low waterproofing performance. In the case of Comparative Example 2, which used liquid-curing urethane resin, no cracks occurred in the waterproof sheet, but due to poor miscibility between the urethane resin and asphalt, the asphalt content bled onto the sheet surface, making it difficult to use in practice. It becomes intolerable. [Effects of the Invention] The composite waterproof layer formed by combining a waterproof sheet with a coating layer made of specific A and B agents according to the present invention has extremely excellent waterproof performance and is also resistant to cracks in the base. It maintains sufficient waterproofness over a long period of time. Furthermore, the waterproofing method of the present invention has excellent workability. Furthermore, the effects achieved by the present invention are shown below. Even if there are some uneven spots on the waterproof base, resulting in areas where the coating thickness is extremely thin, waterproofness is maintained by the upper layer of waterproof sheet. Even if the waterproof base is uneven, the waterproof sheet will not be damaged by forming a cured rubber coating layer, and the base does not need to be extremely smooth as in the case of conventional waterproof sheet construction methods. Since the solvent-free two-component curing liquid rubber composition is applied as a coating film, it is possible to apply a waterproof sheet immediately after application, and not only does it not require any other adhesive, but it can also be used with conventional waterproof sheets. Unlike the construction method, double-sided adhesive is not required, and open time is not required, leading to improved workability. The coating layer acts as a buffer layer for the upper waterproof sheet, so even if the underlying layer cracks, the waterproof sheet will not break. Liquid rubber has excellent compatibility with asphalts, so even when asphalts are used together, the waterproof layer does not deteriorate over time due to bleeding, making it possible to form a highly durable waterproof layer that is more industrially advantageous. It is possible to force it. It is extremely easy to work with as it does not use fire or solvents. The effects achieved by the present invention will be shown in comparison with the case where a relatively low molecular weight isocyanate compound such as diphenylmethane diisocyanate is used as the B agent without using a prepolymer having an isocyanate group. It is as follows. Since the prepolymer itself is a polymer formed from liquid polybutadiene with a relatively large molecular weight, a cured product of liquid polybutadiene with a relatively large molecular weight can be easily obtained, and a coating layer with high elongation can be easily obtained. Since the molecular weight of the prepolymer is relatively large,
Since it has almost no volatility, it makes waterproofing work safer and is favorable from an environmental hygiene standpoint. The waterproof layer of the paint film is formed by the prepolymer of agent B and agent A.
Usually, the isocyanate group is mixed with the liquid polybutadiene agent in a slightly excess amount, but this mixing ratio can be easily adjusted. If the molecular weight of an isocyanate compound is small, the amount of isocyanate groups will change due to a slight change in the mixing weight, so it is necessary to strictly control the mixing ratio.However, in the case of prepolymers, the molecular weight is relatively small. This is because the larger the error range, the wider the tolerance range during mixing.
Claims (1)
ポリブタジエンおよびアスフアルト類を主剤とす
るＡ剤と分子鎖末端に水酸基を有する液状ポリブ
タジエンにイソシアナート化合物を過剰に反応せ
しめて得られる分子鎖末端にイソシアナート基を
有するプレポリマーを主剤とするＢ剤とからなる
液状ゴム組成物を塗布し、その硬化前に、塗布面
に分子鎖末端に水酸基を有する液状ポリブタジエ
ンを基材とする防水シートを敷設し、しかる後前
記液状ゴム組成物を硬化せしめて硬化ゴム塗膜層
と防水シートで複合防水層を形成することを特徴
とする防水施工方法。1. On the base surface, isocyanate is added to the molecular chain ends obtained by reacting an excessive amount of isocyanate compound to liquid polybutadiene having a hydroxyl group at the end of the molecular chain and part A mainly composed of asphalts. A liquid rubber composition consisting of a B agent whose main ingredient is a prepolymer having a nerto group is applied, and before curing, a waterproof sheet whose base material is liquid polybutadiene having a hydroxyl group at the end of the molecular chain is laid on the applied surface. . Thereafter, the liquid rubber composition is cured to form a composite waterproof layer with the cured rubber coating layer and the waterproof sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27164287A JPS63125762A (en) | 1987-10-29 | 1987-10-29 | Waterproof execution method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27164287A JPS63125762A (en) | 1987-10-29 | 1987-10-29 | Waterproof execution method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63125762A JPS63125762A (en) | 1988-05-28 |
| JPH036299B2 true JPH036299B2 (en) | 1991-01-29 |
Family
ID=17502896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27164287A Granted JPS63125762A (en) | 1987-10-29 | 1987-10-29 | Waterproof execution method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63125762A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4042852B2 (en) * | 2003-03-26 | 2008-02-06 | 株式会社イーテック | Compound waterproof construction method |
| KR101957687B1 (en) | 2016-09-08 | 2019-03-19 | 코웨이 주식회사 | Ice maker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5115648A (en) * | 1974-07-25 | 1976-02-07 | House Food Industrial Co | Komugikono satsukinhoho |
| JPS5161537A (en) * | 1974-11-26 | 1976-05-28 | Nippon Synthetic Chem Ind | |
| JPS55155859A (en) * | 1979-05-25 | 1980-12-04 | Towa Kogyo Kk | Method of waterproofing |
-
1987
- 1987-10-29 JP JP27164287A patent/JPS63125762A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5115648A (en) * | 1974-07-25 | 1976-02-07 | House Food Industrial Co | Komugikono satsukinhoho |
| JPS5161537A (en) * | 1974-11-26 | 1976-05-28 | Nippon Synthetic Chem Ind | |
| JPS55155859A (en) * | 1979-05-25 | 1980-12-04 | Towa Kogyo Kk | Method of waterproofing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63125762A (en) | 1988-05-28 |
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