JPH0548274B2 - - Google Patents
Info
- Publication number
- JPH0548274B2 JPH0548274B2 JP60132853A JP13285385A JPH0548274B2 JP H0548274 B2 JPH0548274 B2 JP H0548274B2 JP 60132853 A JP60132853 A JP 60132853A JP 13285385 A JP13285385 A JP 13285385A JP H0548274 B2 JPH0548274 B2 JP H0548274B2
- Authority
- JP
- Japan
- Prior art keywords
- polyurethane foam
- water
- water repellent
- fluorine
- present
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 42
- 239000011496 polyurethane foam Substances 0.000 claims description 42
- 239000005871 repellent Substances 0.000 claims description 32
- 230000002940 repellent Effects 0.000 claims description 30
- 239000004215 Carbon black (E152) Substances 0.000 claims description 13
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 13
- 229910052731 fluorine Inorganic materials 0.000 claims description 13
- 239000011737 fluorine Substances 0.000 claims description 13
- 229930195733 hydrocarbon Natural products 0.000 claims description 13
- 150000002430 hydrocarbons Chemical class 0.000 claims description 13
- 239000003566 sealing material Substances 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 8
- 230000035699 permeability Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 8
- 210000004027 cell Anatomy 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000006260 foam Substances 0.000 description 6
- 238000005187 foaming Methods 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920000570 polyether Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- -1 Perfluoromonocarboxylic acid chromium Chemical compound 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 150000003077 polyols Chemical class 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 2
- HVCNXQOWACZAFN-UHFFFAOYSA-N 4-ethylmorpholine Chemical compound CCN1CCOCC1 HVCNXQOWACZAFN-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 241000555081 Stanus Species 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000010775 animal oil Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 210000000497 foam cell Anatomy 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 125000005474 octanoate group Chemical group 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 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 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- 229940029284 trichlorofluoromethane Drugs 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Landscapes
- Gasket Seals (AREA)
- Sealing Material Composition (AREA)
Description
〔産業上の利用分野〕
本発明は特定物性の軟質ポリウレタンフオーム
に含フツ素炭化水素系撥水剤で含浸処理してなる
シーリング材に関する。
〔従来の技術〕
従来、軟質ポリウレタンフオームシーリング材
としては、軟質ポリウレタンフオームにアスフア
ルト等を混和したり、含浸させたものが使用され
ており、また軟質ポリウレタンフオームの製造時
に融点又は軟化点が150℃以上で常圧における沸
点が200℃以上である実質的に軟化水素よりなる
物質、動植物油又はジアルキルフタレートを配合
し、軟質ポリウレタンフオームに防水性を付与し
たものも知られている（特公昭59−37036号公
報）。
〔発明が解決しようとする問題点〕
しかしながら、このような提案にもかかわら
ず、更に止水性能に優れた軟質ポリウレタンフオ
ームシーリング材が望まれる。
本発明は上記事情に鑑みなされたもので、良好
な止水効果を有し、このためシーリング材として
優れた特性を発揮する軟質ポリウレタンフオーム
シーリング材を提供することを目的とする。
〔問題点を解決するための手段及び作用〕
即ち、本発明者らは止水性能の優れた軟質ポリ
ウレタンフオームシーリング材を得ることについ
て鋭意検討を行なつた結果、軟質ポリウレタンフ
オームとして特定の物性のものを使用することが
重要であり、しかもこれに少量の含フツ素炭化水
素系撥水剤にて含浸処理した場合、止水効果の非
常に高いシーリング剤が得られることを知見し、
本発明を完成するに至つたもので、本発明は25mm
長さ当りセル数が40個以上であり、10mm厚さにお
ける通気量が50c.c.／cm2・sec以下であり、かつ25
％圧縮時の硬度が15Kgｆ以下である軟質ポリウレ
タンフオームを含フツ素炭化水素系撥水剤にて軟
質ポリウレタンフオーム重量に対し撥水剤の固形
分として0.1〜５重量％の割合で含浸処理してな
ることを特徴とするシーリング材を提供するもの
である。
本発明によれば、上述した特定物性の軟質ポリ
ウレタンフオームに含フツ素炭化水素系撥水剤を
含浸したことにより、撥水剤の少量の使用で優れ
た止水性が確保できる。また、製造も簡単であ
り、取り扱い性が良好なものである。
以下、本発明につき更に詳しく説明する。
本発明に係るシーリング材において、軟質ポリ
ウレタンフオームとしては、25mm長さ当りのセル
数が40個以上であり、10mm厚さにおける通気量が
50c.c.／cm2・sec以下であり、かつ25％圧縮時の硬
度が15Kgｆ以下のものを使用するものであつて、
この種の軟質ポリウレタンフオームを用いること
により止水性能の優れたシーリング材を得ること
ができる。これに対し、セル数、通気量、硬度の
いずれか一つでも上記範囲を外れた軟質ポリウレ
タンフオームを使用しても止水効果が低下し、本
発明の目的が達成されない。なお、通気量のより
好ましい範囲は通気量30c.c.／cm2・sec以下、25％
圧縮硬度のより好ましい範囲は12Kgｆ以下であ
る。
ここで、軟質ポリウレタンフオームは、ポリエ
ーテルポリオールを用いたポリエーテルポリウレ
タンフオームでもよく、ポリエステルポリオール
を用いたポリエステルポリウレタンフオームでも
よいが、ポリエーテルポリウレタンフオームがよ
り好ましい。即ち、通常、止水性フオームとして
実用化されているのは、殆んどエステル系フオー
ムであり、これはアスフアルト等の疎水性剤を溶
剤で希釈し含浸する際、溶剤によりフオームの過
度の膨潤を防止することができ、また発泡時に疎
水性剤を添加して発泡する際、フオームのセルを
コントロールしやすいという長所がある一方、エ
ステル系フオームは耐湿熱老化性が劣るという欠
点があるためである。これに対し、本発明は、ア
スフアルト等の疎水剤を多量に発泡時に添加した
り、発泡後に後処理するのではなく、少量の含フ
ツ素炭化水素系撥水剤にて処理するので、安価で
かつ耐湿熱性、耐水性の優れたエーテル系ウレタ
ンフオームを有効に使用できるものである。な
お、本発明に用いる軟質ポリウレタンフオームは
上述した特性を有するものであればいずれのもの
も使用することができ、ポリウレタンフオーム製
造用原料の配合処方に特に制限はなく、公知の原
料を使用し得る。またこの場合、種々の添加剤を
配合することができ、例えば前記特公昭59−
37036号公報等に記載されているような疎水性物
質を配合し、撥水性にした軟質ポリウレタンフオ
ームを使用することもできる。
本発明のシーリング材は、以上述べたような軟
質ポリウレタンフオームを含フツ素炭化水素系撥
水剤にて含浸処理するものであるが、含フツ素炭
化水素系撥水剤としては下記(1)〜(4)で示すものが
挙げられる。
(1) 一般式
（但し、ｎ≧１）
で示されるパーフロロモノカルボン酸クロム錯
塩。代表的にはパーフロロネオペンチルモノカ
ルボン酸クロム錯塩。
(2) 一般式
（但し、ｎ≧１、ｍ≧１）
で示されるアクリル酸フツ素化アルキルエステ
ルの重合物。
(3) 一般式
（但し、ｎ≧１、ｍ≧３、ｘ≧５）
で示されるアクリル酸フツ素化塩素化アルキル
エステルの重合物。
(4) 一般式
CoF2o+1CONHCHRCOOH
（但し、Ｒはアルキル基、ｎ≧１）
で示されるフツ素化脂肪酸アミド。
これらのうちでは、特に(1)〜(3)のものが好まし
い。
なお、本発明においては、含フツ素炭化水素系
撥水剤はその１種を単独で使用しても２種以上を
併用するようにしてもよい。
含フツ素炭化水素系撥水剤を軟質ポリウレタン
フオームに含浸処理する方法は必ずしも制限され
ないが、撥水剤を水等の溶媒で適当な希釈率（通
常１〜10％）に希釈し、この中に必要な厚さに裁
断した軟質ポリウレタンフオームを浸漬してその
内部まで十分に含浸液を浸透させた後、ローラー
等にて余剰の含浸液を絞り、150℃程度で数分間
乾燥して撥水剤を固化させる方法が好適に採用さ
れる。
ここで、含フツ素炭化水素系撥水剤の含浸量は
ポリウレタンフオーム重量に対し撥水剤の固形分
として0.1〜５％（重量％、以下同じ）、特に0.3
〜３％とすることが好ましい。含浸量が0.1％よ
り少ないと止水効果が十分でなく、また５％より
多いと経済的でない上、止水性も低下する場合が
生じる。
〔発明の効果〕
以上説明したように、本発明のシーリング材は
特定物性、即ちセル数40個以上／25mm、10mm厚さ
の通気量50c.c.／cm2・sec以下、25％圧縮硬度15Kg
ｆ以下の軟質ポリウレタンフオームを含フツ素炭
化水素系撥水剤にて含浸処理したことにより、含
フツ素炭化水素系撥水剤の少量の使用で非常に止
水性能が良く、シーリング材として優れた特性を
具備しているものである。
以下、実施例と比較例を示し、本発明を具体的
に説明するが、本発明は下記の実施例に制限され
るものではない。
なお、下記の例において、ポリウレタンフオー
ムのセル数はJIS−Ｋ−6402に、通気量はJIS−Ｌ
−1004に、25％圧縮時の硬度はJIS−Ｋ−6401に
それぞれ準拠して測定した。
また、止水性能は下記方法により試験した。
止水性能試験方法
第１図に示したような10mm巾のＵ字サンプルａ
を第２図に示したように一方のアクリル板ｂにセ
ツトし、更にサンプルａを所定の圧縮率に保持す
るためのスペーサーｃをかませ、他方のアクリル
板b′を重ねた後、ボルトとナツトｄを用いて２枚
のアクリル板ｂ、b′を締め合せ、サンプルａを所
定の圧縮率に圧縮する。
次に、水ｅを両アクリル板ｂ、b′間に形成され
た隙間からＵ字サンプルａ内に水柱50mmになるよ
うに注入し、放置する。
注水直後をテスト開始とし、Ｕ字サンプルａよ
りわずかでも水が漏れた時点を漏水時とし、テス
ト開始時からの経過時間を記録する。
〔実施例１、比較例１〕
下記配合処方のポリウレタンフオーム製造用原
料を用い、これを回転数3500rpmで撹拌し、発泡
機にて発泡させて下記に示す物性の軟質ポリウレ
タンフオームを製造した。
ポリウレタンフオーム製造用原料配合処方
分子量3800のトリオール＊１ 100重量部
硫酸バリウム 75 〃
トリレンジイソシアネート 36.6 〃
水 2.7 〃
トリエチレンジアミン 0.25 〃
Ｎ−エチルモルフオリン 0.30 〃
デゴスターブB8017＊２ 1.20 〃
スタナスオクトエート 0.45 〃
トリクロロモノフルオロメタン 2.00 〃
＊１：グリセリンにプロピレンオキシド及びエチ
レンオキシドを付加させたポリオール
＊２：ポリアルキルシロキサン・ポリオキシエチ
レン・ポリオキシプロピレン共重合体（ゴール
ドシユミツト社製）
ポリウレタンフオームの物性
密度（ｇ／cm3） 0.0452
25％硬度（Kgｆ） 11.4
セル数（個／25mm） 48
通気量（c.c.／cm2・sec） 28.0
次に、このポリウレタンフオームを５mm厚さの
シートに裁断し、含フツ素炭化水素系撥水剤とし
てアサヒガードAG710（アクリル酸フツ素化アル
キルエステル重合物、旭硝子株式会社製）の５％
水溶液を使用し、下記の方法で撥水処理を行なつ
た。
即ち、ポリウレタンフオームを撥水剤水溶液中
に５分間浸漬し圧縮して撥水剤を含浸させた後、
絞りロールにて一部脱水した。このポリウレタン
フオームを150℃恒温槽中で約３分間加熱し乾燥
して撥水剤を固化させた後、１昼夜室温に放置し
て撥水処理したポリウレタンフオームを得た。な
お、撥水剤の付着量は約0.8％であつた。
このようにして得られた撥水処理ポリウレタン
フオーム及び比較のため撥水処理を行わないポリ
ウレタンフオームを用いての止水性能を評価し
た。結果を第１表に示す。
[Industrial Field of Application] The present invention relates to a sealing material obtained by impregnating a soft polyurethane foam with specific physical properties with a fluorine-containing hydrocarbon water repellent. [Prior Art] Conventionally, soft polyurethane foam sealants have been made by mixing or impregnating soft polyurethane foam with asphalt, etc.; It is also known that waterproofing properties are imparted to flexible polyurethane foam by blending a substance consisting essentially of softened hydrogen with a boiling point of 200°C or higher at normal pressure, animal or vegetable oil, or dialkyl phthalate. Publication No. 37036). [Problems to be Solved by the Invention] However, despite such proposals, a flexible polyurethane foam sealing material with even better water-stopping performance is desired. The present invention was made in view of the above circumstances, and an object of the present invention is to provide a soft polyurethane foam sealing material that has a good water-stopping effect and therefore exhibits excellent properties as a sealing material. [Means and effects for solving the problem] That is, the present inventors have conducted intensive studies on obtaining a soft polyurethane foam sealing material with excellent water-stopping performance, and as a result, they have developed a soft polyurethane foam with specific physical properties. It is important to use water repellent, and we discovered that if we impregnated it with a small amount of fluorine-containing hydrocarbon water repellent, we could obtain a sealant with extremely high water-stopping effect.
The present invention has been completed, and the present invention is 25 mm
The number of cells per length is 40 or more, the airflow rate at 10 mm thickness is 50 c.c./cm 2 · sec or less, and 25
A soft polyurethane foam with a hardness of 15 kgf or less when compressed is impregnated with a fluorine-containing hydrocarbon water repellent at a ratio of 0.1 to 5% by weight of the solid content of the water repellent based on the weight of the soft polyurethane foam. The present invention provides a sealing material characterized by: According to the present invention, by impregnating the soft polyurethane foam with the above-mentioned specific physical properties with a fluorine-containing hydrocarbon water repellent, excellent water-stopping properties can be ensured with the use of a small amount of the water repellent. Moreover, it is easy to manufacture and has good handling properties. The present invention will be explained in more detail below. In the sealing material according to the present invention, the soft polyurethane foam has a cell count of 40 or more per 25 mm length, and an air permeability at a thickness of 10 mm.
50c.c./cm2・sec or less, and the hardness at 25% compression is 15Kgf or less,
By using this type of soft polyurethane foam, a sealing material with excellent water-stopping performance can be obtained. On the other hand, even if a flexible polyurethane foam having any one of the cell number, air flow rate, and hardness outside the above ranges is used, the water-stopping effect will be reduced and the object of the present invention will not be achieved. In addition, the more preferable range of ventilation amount is 30c.c./cm 2・sec or less, 25%.
A more preferable range of compression hardness is 12 Kgf or less. Here, the flexible polyurethane foam may be a polyether polyurethane foam using a polyether polyol or a polyester polyurethane foam using a polyester polyol, but a polyether polyurethane foam is more preferable. In other words, most of the waterproof foams that are put into practical use are ester foams, which are used to prevent excessive swelling of the foam by the solvent when diluting and impregnating a hydrophobic agent such as asphalt with a solvent. This is because while it has the advantage of being able to prevent foaming and making it easy to control the foam cells when foaming by adding a hydrophobic agent during foaming, ester foams have the disadvantage of poor moist heat aging resistance. . In contrast, the present invention does not add a large amount of a hydrophobic agent such as asphalt during foaming, or perform post-treatment after foaming, but instead uses a small amount of a fluorine-containing hydrocarbon water repellent, so it is inexpensive. Moreover, ether-based urethane foam having excellent heat and humidity resistance and water resistance can be effectively used. Note that any flexible polyurethane foam used in the present invention can be used as long as it has the above-mentioned characteristics, and there is no particular restriction on the formulation of raw materials for producing polyurethane foam, and known raw materials may be used. . In addition, in this case, various additives can be blended, for example, the above-mentioned Japanese Patent Publication No. 59-
It is also possible to use a soft polyurethane foam made water repellent by blending a hydrophobic substance as described in Japanese Patent No. 37036 and the like. The sealing material of the present invention is obtained by impregnating the soft polyurethane foam as described above with a fluorine-containing hydrocarbon water repellent. Examples of the fluorine-containing hydrocarbon water repellent include (1) Examples include those shown in ~(4). (1) General formula (However, n≧1) Perfluoromonocarboxylic acid chromium complex salt. A typical example is perfluoroneopentyl monocarboxylic acid chromium complex salt. (2) General formula (However, n≧1, m≧1) A polymer of acrylic acid fluorinated alkyl ester. (3) General formula (However, n≧1, m≧3, x≧5) A polymer of acrylic acid fluorinated chlorinated alkyl ester. (4) Fluorinated fatty acid amide represented by the general formula C o F 2o+1 CONHCHRCOOH (wherein R is an alkyl group, n≧1). Among these, those (1) to (3) are particularly preferred. In the present invention, the fluorine-containing hydrocarbon water repellent may be used alone or in combination of two or more. The method of impregnating soft polyurethane foam with a fluorine-containing hydrocarbon water repellent is not necessarily limited, but the water repellent is diluted with a solvent such as water to an appropriate dilution rate (usually 1 to 10%), and After soaking the soft polyurethane foam cut to the required thickness and allowing the impregnating liquid to fully penetrate into the foam, squeeze out the excess impregnating liquid with a roller, etc., and dry at around 150℃ for several minutes to make it water repellent. A method of solidifying the agent is preferably employed. Here, the impregnated amount of the fluorine-containing hydrocarbon water repellent is 0.1 to 5% (wt%, the same hereinafter) as solid content of the water repellent based on the weight of the polyurethane foam, especially 0.3
It is preferable to set it to 3%. If the impregnation amount is less than 0.1%, the water-stopping effect will not be sufficient, and if it is more than 5%, it will not be economical, and the water-stopping property may also be reduced. [Effects of the Invention] As explained above, the sealing material of the present invention has specific physical properties, namely, the number of cells is 40 or more/25 mm, the air flow rate at 10 mm thickness is 50 c.c./cm 2 sec or less, and the compression hardness is 25%. 15Kg
By impregnating soft polyurethane foam with a fluorine-containing hydrocarbon water repellent of less than f, it has very good water-stopping performance even when using a small amount of a fluorine-containing hydrocarbon water repellent, making it excellent as a sealing material. It has the following characteristics. EXAMPLES Hereinafter, the present invention will be specifically explained by showing examples and comparative examples, but the present invention is not limited to the following examples. In addition, in the example below, the number of cells of the polyurethane foam is in accordance with JIS-K-6402, and the airflow rate is in accordance with JIS-L.
-1004 and hardness at 25% compression were measured in accordance with JIS-K-6401. Moreover, water stop performance was tested by the following method. Water stop performance test method 10mm wide U-shaped sample a as shown in Figure 1
is set on one acrylic plate b as shown in Fig. 2, a spacer c is fitted to hold the sample a at a predetermined compression ratio, and the other acrylic plate b' is stacked on top of the other acrylic plate b', and then bolts and Two acrylic plates b and b' are fastened together using a nut d, and sample a is compressed to a predetermined compression ratio. Next, water e was injected into the U-shaped sample a through the gap formed between both acrylic plates b and b' so that the water column was 50 mm, and the sample was left to stand. The test is started immediately after water is poured, the time when even a small amount of water leaks from the U-shaped sample a is defined as the water leakage time, and the elapsed time from the start of the test is recorded. [Example 1, Comparative Example 1] Raw materials for producing polyurethane foam having the following formulation were stirred at a rotation speed of 3500 rpm and foamed in a foaming machine to produce a flexible polyurethane foam having the physical properties shown below. Raw material formulation for polyurethane foam production Triol with a molecular weight of 3800*1 100 parts by weight Barium sulfate 75 〃 Tolylene diisocyanate 36.6 〃 Water 2.7 〃 Triethylenediamine 0.25 〃 N-Ethylmorpholine 0.30 〃 Degostarb B8017＊2 1.20 〃 Stanus octoate 0.45 〃 Trichloromonofluoromethane 2.00 〃 *1: Polyol made by adding propylene oxide and ethylene oxide to glycerin *2: Polyalkylsiloxane/polyoxyethylene/polyoxypropylene copolymer (manufactured by Goldschmidt) Physical property density of polyurethane foam (g/cm 3 ) 0.0452 25% hardness (Kgf) 11.4 Number of cells (cells/25mm) 48 Air permeability (cc/cm 2・sec) 28.0 Next, this polyurethane foam was cut into a 5mm thick sheet and the 5% of Asahi Guard AG710 (acrylic acid fluorinated alkyl ester polymer, manufactured by Asahi Glass Co., Ltd.) as a fluorocarbon water repellent
Water repellency treatment was carried out using an aqueous solution in the following manner. That is, after immersing the polyurethane foam in a water repellent aqueous solution for 5 minutes and compressing it to impregnate it with the water repellent,
Part of the water was removed using a squeezing roll. This polyurethane foam was heated for about 3 minutes in a constant temperature bath at 150°C to dry and solidify the water repellent, and then left at room temperature for one day and night to obtain a water repellent polyurethane foam. The amount of water repellent applied was approximately 0.8%. The water-stopping performance of the thus obtained water-repellent polyurethane foam and, for comparison, a polyurethane foam that was not subjected to water-repellent treatment was evaluated. The results are shown in Table 1.
ポリウレタンフオームの裁断厚さを10mmにした
以外は実施例１、比較例１と同様に製造したサン
プルの止水性能を評価し、第２表に示す結果を得
た。
The water-stop performance of samples manufactured in the same manner as in Example 1 and Comparative Example 1 except that the cut thickness of the polyurethane foam was 10 mm was evaluated, and the results shown in Table 2 were obtained.
【表】
ンフオームの撥水剤の付着量は約
1％であつた。
比較例 ３〜５
第３表に示す配合処方のポリウレタンフオーム
製造用原料を使用し、実施例１と同様にて第３表
に示す軟質ポリウレタンフオームを製造した。こ
れを５mm厚さのシートに裁断し、実施例１と同様
に撥水処理を施した（撥水剤付着量約0.8％）。次
に、その止水性能を評価し、第３表に示す結果を
得た。[Table] The amount of water repellent applied to NFORM is approx.
It was 1%.
Comparative Examples 3 to 5 Flexible polyurethane foams shown in Table 3 were manufactured in the same manner as in Example 1 using raw materials for manufacturing polyurethane foams having the formulations shown in Table 3. This was cut into a 5 mm thick sheet and subjected to water repellent treatment in the same manner as in Example 1 (approximately 0.8% water repellent adhesion amount). Next, the water stop performance was evaluated, and the results shown in Table 3 were obtained.
【表】
第３表の結果より、セル数、通気量、25％圧縮
時の硬度が本発明の範囲外のポリウレタンフオー
ムを用いても良好な止水性能が得られないことが
認められる。[Table] From the results in Table 3, it is recognized that good water-stopping performance cannot be obtained even when using a polyurethane foam whose cell number, air flow rate, and hardness at 25% compression are outside the range of the present invention.
第１図及び第２図はそれぞれシーリング材の止
水性能を調べるために使用する装置の斜視図であ
る。
FIG. 1 and FIG. 2 are perspective views of an apparatus used to examine the water-stopping performance of a sealant, respectively.
Claims (1)
10mm厚さにおける通気量が50c.c.／cm2・sec以下で
あり、かつ25％圧縮時の硬度が15Kgｆ以下である
軟質ポリウレタンフオームを含フツ素炭化水素系
撥水剤にて軟質ポリウレタンフオーム重量に対し
撥水剤の固形分として0.1〜５重量％の割合で含
浸処理してなることを特徴とするシーリング材。1 The number of cells per 25 mm length is 40 or more,
Soft polyurethane foam with air permeability of 50 c.c./cm 2 sec or less at 10 mm thickness and hardness of 15 Kgf or less at 25% compression is treated with a fluorine-containing hydrocarbon water repellent. A sealing material characterized by being impregnated with a water repellent at a solid content of 0.1 to 5% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13285385A JPS61291673A (en) | 1985-06-17 | 1985-06-17 | Sealing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13285385A JPS61291673A (en) | 1985-06-17 | 1985-06-17 | Sealing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61291673A JPS61291673A (en) | 1986-12-22 |
| JPH0548274B2 true JPH0548274B2 (en) | 1993-07-21 |
Family
ID=15091050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13285385A Granted JPS61291673A (en) | 1985-06-17 | 1985-06-17 | Sealing material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61291673A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6414291A (en) * | 1987-07-08 | 1989-01-18 | Sekisui Plastics | Sealing material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5266137A (en) * | 1975-11-27 | 1977-06-01 | Nitto Boseki Co Ltd | Packing material |
| JPS5525433A (en) * | 1978-08-12 | 1980-02-23 | Nhk Spring Co Ltd | Sealing material |
| JPS55128451A (en) * | 1979-03-29 | 1980-10-04 | Nippon Pillar Packing | Sheet material |
| JPS57167376A (en) * | 1981-04-09 | 1982-10-15 | Nitto Boseki Co Ltd | Sealing material |
-
1985
- 1985-06-17 JP JP13285385A patent/JPS61291673A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5266137A (en) * | 1975-11-27 | 1977-06-01 | Nitto Boseki Co Ltd | Packing material |
| JPS5525433A (en) * | 1978-08-12 | 1980-02-23 | Nhk Spring Co Ltd | Sealing material |
| JPS55128451A (en) * | 1979-03-29 | 1980-10-04 | Nippon Pillar Packing | Sheet material |
| JPS57167376A (en) * | 1981-04-09 | 1982-10-15 | Nitto Boseki Co Ltd | Sealing material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61291673A (en) | 1986-12-22 |
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