JP3920309B2 - Composition for preventing asbestos scattering - Google Patents
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Description
本発明は、アスベスト飛散防止用組成物および該組成物を用いるアスベストを含有する部材の処理方法に関する。 The present invention relates to a composition for preventing asbestos scattering and a method for treating a member containing asbestos using the composition.
アスベストは、１９７０年から１９９０年にかけて大量に日本国に輸入され、その防火性、保温性が良好なことから、建材として家、公共施設、学校、工場などの多くの建築物に使用されてきた。しかしながら、近年、アスベストが原因とされる疾患（石綿肺、肺がん、胸膜・腹膜などの中皮腫）が多数報告されており、アスベストを含んだ部材の取り扱い、特に建築物を解体する際にアスベストの飛散を防止することが問題となっている。 Asbestos was imported into Japan in large quantities from 1970 to 1990 and has been used as a building material in many buildings such as houses, public facilities, schools and factories because of its good fireproofing and heat insulation properties. . However, in recent years, many diseases (asbestosis, lung cancer, mesothelioma such as pleura / peritoneum) caused by asbestos have been reported, and handling of materials containing asbestos, especially when disassembling buildings, It has become a problem to prevent the scattering.
従来から、アスベストを含む部材を除去する際に、粘性を有する飛散防止剤をアスベストを含む部材の表面に吹きつけてその表面上に被覆膜を形成した後、前記部材を機械的に剥離除去する方法が用いられている。例えば、特許文献１などには、粘性のある飛散防止剤をアスベスト表面に吹き付けて膜状とし、ついでアスベストを剥離した際に飛散防止剤内にアスベストを包み込んで保持することで、飛散を抑えながらアスベストを除去する方法が開示されている。 Conventionally, when removing a member containing asbestos, a spraying agent having viscosity is sprayed on the surface of the member containing asbestos to form a coating film on the surface, and then the member is mechanically peeled and removed. Method is used. For example, in Patent Document 1 and the like, a viscous scatter preventive agent is sprayed onto the surface of asbestos to form a film, and when the asbestos is peeled off, the asbestos is wrapped and held in the scatter preventive agent while suppressing scattering. A method for removing asbestos is disclosed.
しかしながら、かかる方法では、アスベストを含む部材の量が大きくなれば、それに伴い使用する飛散防止剤も多量にする必要があるため、飛散防止剤の硬化に多大な時間を要するという問題がある。また、部材内部のアスベストは飛散防止剤の皮膜に包み込まれるまでは実質的にフリーの状態にあるため、剥離時に部材のアスベストが飛散してしまうという問題もある。 However, in this method, if the amount of the member containing asbestos increases, it is necessary to use a large amount of the anti-scattering agent to be used, so that it takes a long time to cure the anti-scattering agent. Moreover, since the asbestos inside the member is in a substantially free state until it is encased in the film of the anti-scattering agent, there is also a problem that the asbestos of the member is scattered at the time of peeling.
また、アスベストを含む部材の表面に水をかけながら、剥離処理を行う方法も知られているが、前記と同様にアスベストは固定されていないため、アスベストの飛散防止効果は優れたものとは到底いえない。 In addition, a method of performing a peeling treatment while applying water to the surface of a member containing asbestos is also known, but asbestos is not fixed in the same manner as described above, so that the asbestos scattering prevention effect is very good. I can't say that.
そこで、本発明は、上記の課題を解決するために完成されたものであり、飛散防止剤の膜を形成するのではなく、アスベスト部材内部に含浸させることで、少量かつ短い処理時間でアスベストの飛散を顕著に防止できるアスベスト飛散防止用組成物を提供することを目的としている。
また、本発明は、アスベストの飛散を顕著に防止しうる、アスベストを含む部材の処理方法を提供することを目的としている。
なお、本発明においてアスベストとは、蛇紋石や角閃石が繊維状になっているものをいい、いわゆる石綿を示すが、ロックウールも含み得る。
Therefore, the present invention has been completed to solve the above-mentioned problems. Rather than forming a film of an anti-scattering agent, the present invention impregnates the inside of the asbestos member so that a small amount of asbestos can be obtained in a short processing time. An object of the present invention is to provide a composition for preventing asbestos scattering that can remarkably prevent scattering.
Another object of the present invention is to provide a method for treating a member containing asbestos, which can remarkably prevent asbestos from scattering.
In the present invention, asbestos refers to a material in which serpentine or amphibole is in the form of a fiber, so-called asbestos, but also includes rock wool.
すなわち、本発明の要旨は、
〔１〕ポリマー粒子の平均粒子径が０.０８μｍ以下のアクリル系樹脂エマルジョンおよび／またはポリマー粒子の平均粒子径が０.０８μｍ以下のスチレン-ブタジエン系樹脂エマルジョンを含有し、アクリル系樹脂エマルジョンおよびスチレン−ブタジエン系樹脂エマルジョンの樹脂固形分量が１０〜１３重量％であるアスベスト飛散防止用組成物、
〔２〕前記〔１〕記載のアスベスト飛散防止用組成物を、アスベストを含む部材に含浸させる工程、および前記アスベスト飛散防止用組成物を乾燥させる工程を含む、アスベストを含む部材の処理方法
に関する。
That is, the gist of the present invention is as follows.
[1] The average particle diameter of 0.08 [mu] m or less of styrene having an average particle diameter of 0.08 [mu] m or less of acrylic resin emulsion and / or polymer particles of the polymer particles - containing butadiene resin emulsion, acrylic resin emulsion and styrene - butadiene resin solid content of the resin emulsion Ru 10-13 wt% der asbestos splattering preventive composition,
The [2] above [1] Asbestos splattering preventive composition wherein the step of impregnating the member containing asbestos, and the step of drying the asbestos splattering preventive composition, a method of processing members including asbestos.
本発明のアスベスト飛散防止用組成物を用いることで、安全で手軽にアスベストの飛散を顕著に防止しながら、アスベストを含む部材の除去を行うことができる。
また、本発明のアスベスト飛散防止用組成物は、アスベストを含む部材に含浸されるため、従来の飛散防止剤のように可燃性の厚い膜が部材表面に形成される場合に比べて、部材本来の耐火性を維持できる。
By using the composition for preventing asbestos scattering of the present invention, it is possible to remove a member containing asbestos while remarkably preventing asbestos from being scattered safely and easily.
Further, since the composition for preventing asbestos scattering of the present invention is impregnated in a member containing asbestos, compared to the case where a thick flammable film is formed on the surface of the member as in the case of a conventional scattering preventing agent, Can maintain the fire resistance.
また、本発明のアスベスト飛散防止用組成物をケイソウ土を含む部材に使用することで、安全で手軽にケイソウ土の飛散を顕著に防止しながら、ケイソウ土を含む部材の除去を行うこともできる。 Further, by using the composition for preventing asbestos scattering of the present invention for a member containing diatomaceous earth, it is possible to remove the member containing diatomaceous earth while remarkably preventing the scattering of diatomaceous earth safely and easily. .
本発明のアスベスト飛散防止用組成物（以下、単に本発明の組成物という）は、ポリマー粒子の平均粒子径が０.１μｍ以下のアクリル系樹脂エマルジョンおよび／またはポリマー粒子の平均粒子径が０.１μｍ以下のスチレン-ブタジエン系樹脂エマルジョンを含有する。
本発明においては、前記のようにポリマー粒子の平均粒子径が０.１μｍ以下の特定の樹脂エマルジョンを用いることで、アスベストを含む部材の内部に速やかに含浸されるため、アスベスト繊維間を固着させることができ、また、厚みのある部材を解体する場合でも少量、かつ短い処理時間でアスベストの飛散を妨げながら処理を行うことができるという顕著な効果が奏される。
The composition for preventing asbestos scattering (hereinafter simply referred to as the composition of the present invention) of the present invention has an average particle diameter of 0.1 μm or less for the acrylic resin emulsion and / or polymer particles having an average particle diameter of 0.1 μm or less. Contains a styrene-butadiene resin emulsion of 1 μm or less.
In the present invention, as mentioned above, by using a specific resin emulsion in which the average particle diameter of the polymer particles is 0.1 μm or less, the inside of the member containing asbestos is quickly impregnated, so that the asbestos fibers are fixed. In addition, even when a thick member is disassembled, a remarkable effect is achieved that the treatment can be performed while preventing the asbestos from being scattered in a small amount and in a short treatment time.
本発明者が検討した結果、本発明の組成物を、アスベストを含む部材の表面に吹き付けると、その表面から内部へ速やかに含浸される現象が見られた。
このように、前記の樹脂エマルジョンがアスベストを含む部材の内部に含浸されやすい理由としては明らかではないが、例えば、部材の表面に本発明の組成物を吹き付ける、塗布する等で接触させると、部材内の空隙のもつ毛管現象により、樹脂の含浸が促進されるためと考えられる。
As a result of the study by the present inventors, when the composition of the present invention was sprayed on the surface of a member containing asbestos, a phenomenon of rapid impregnation from the surface to the inside was observed.
Thus, although it is not clear why the resin emulsion is easily impregnated in the inside of the member containing asbestos, for example, when the composition of the present invention is sprayed or applied to the surface of the member, the member This is probably because the impregnation of the resin is promoted by the capillary phenomenon of the voids inside.
本発明に用いられるアクリル系樹脂エマルジョンとしては、芳香族ビニル系単量体、（メタ）アクリル酸エステル単量体から選ばれる１種以上の単量体、ヒドロキシル基含有ビニル系単量体、ニトル基含有ビニル系単量体、およびカルボキシル基含有ビニル系単量体からなる群より選ばれる１種以上の単量体を含む単量体組成物を乳化重合して得られるものが挙げられる。 Examples of the acrylic resin emulsion used in the present invention include one or more monomers selected from aromatic vinyl monomers, (meth) acrylic acid ester monomers, hydroxyl group-containing vinyl monomers, and nitrile. Examples thereof include those obtained by emulsion polymerization of a monomer composition containing at least one monomer selected from the group consisting of a group-containing vinyl monomer and a carboxyl group-containing vinyl monomer.
また、スチレン−ブタジエン系樹脂エマルジョンとしては、芳香族ビニル系単量体、ジエン系単量体から選ばれる１種以上の単量体、（メタ）アクリル酸エステル単量体、ヒドロキシ基含有ビニル系単量体、ニトリル基含有ビニル系単量体およびカルボキシル基含有ビニル系単量体からなる群より選ばれる１種以上の単量体を含む単量体組成物を乳化重合して得られるものが挙げられる。 The styrene-butadiene resin emulsion includes one or more monomers selected from aromatic vinyl monomers and diene monomers, (meth) acrylic acid ester monomers, and hydroxy group-containing vinyl resins. What is obtained by emulsion polymerization of a monomer composition containing at least one monomer selected from the group consisting of a monomer, a nitrile group-containing vinyl monomer, and a carboxyl group-containing vinyl monomer Can be mentioned.
前記樹脂エマルジョンのポリマー粒子の平均粒子径としては、いずれも０.１μｍ以下であり、浸透性の観点から、０.０８μｍ以下が好ましい。なお、平均粒子径は、光散乱法（ＤＬＳ法）により測定された値をいう。
なお、樹脂の平均分子量などの物性については特に限定はない。
The average particle size of the polymer particles of the resin emulsion is 0.1 μm or less, and preferably 0.08 μm or less from the viewpoint of permeability. In addition, an average particle diameter says the value measured by the light-scattering method (DLS method).
The physical properties such as the average molecular weight of the resin are not particularly limited.
前記樹脂エマルジョンの樹脂固形分量は、８〜１５重量％が好ましく、１０〜１３重量％がより好ましい。前記固形分量が１５重量％を超えると浸透性が低下し、８重量％未満では固化能力が低下する傾向がある。なお、前記の固形分量は、部材に吹き付けたり、塗装する際の量である。 The resin solid content of the resin emulsion is preferably 8 to 15% by weight, more preferably 10 to 13% by weight. When the solid content exceeds 15% by weight, the permeability decreases, and when it is less than 8% by weight, the solidification ability tends to decrease. In addition, the said solid content amount is the quantity at the time of spraying on a member or coating.
本発明の組成物には、前記樹脂エマルジョンをそのまま使用してもよい。また、本発明の組成物は、前記樹脂エマルジョンに加えて、浸透剤を含有させることができる。浸透剤を含有させることで、アスベストを含む部材内への含浸をより促進させることができる。
浸透剤としては、界面活性剤、フッ素系、シリコン系、アセチレンジオール系浸透剤などが挙げられるが、表面張力を低下させるものであれば特に限定はない。
In the composition of the present invention, the resin emulsion may be used as it is. The composition of the present invention can contain a penetrant in addition to the resin emulsion. By containing the penetrant, the impregnation into the member containing asbestos can be further promoted.
Examples of the penetrant include surfactants, fluorine-based, silicon-based, and acetylenic diol penetrants, but are not particularly limited as long as the surface tension is reduced.
前記浸透剤の本発明の組成物中における含有量としては、樹脂固形分量を１００重量部とした場合３重量部以下が好ましく、浸透深さの均一性の観点から、０.５〜２重量部がより好ましい。 The content of the penetrant in the composition of the present invention is preferably 3 parts by weight or less when the resin solid content is 100 parts by weight, and from the viewpoint of uniformity of the penetration depth, 0.5 to 2 parts by weight. Is more preferable.
本発明の組成物に用いられる樹脂エマルジョンの媒体には水を用いる。水の量としては樹脂固形分の量により一概に限定できない。 Water is used as the medium for the resin emulsion used in the composition of the present invention. The amount of water cannot be generally limited by the amount of resin solids.
本発明の組成物は、前記樹脂エマルジョン、水、必要であれば浸透剤をそれぞれ混合することで調製することができる。混合には手で攪拌してもよく、ディスパーなどの混合機を用いてもよい。温度、時間、添加順序などの他の混合条件については特に限定はない。 The composition of the present invention can be prepared by mixing the resin emulsion, water and, if necessary, the penetrant. Mixing may be carried out by hand, or a mixer such as a disper may be used. Other mixing conditions such as temperature, time, and order of addition are not particularly limited.
以上のようにして得られる本発明の組成物は、内装の建材に使用されることが多く、作業上の安全性の観点から、樹脂が水中に分散された水系エマルジョンの形態であることが好ましい。 The composition of the present invention obtained as described above is often used for interior building materials, and is preferably in the form of a water-based emulsion in which a resin is dispersed in water from the viewpoint of work safety. .
本発明の組成物の粘度は、浸透性の観点から、２０℃で、５０ｍＰａ・ｓ以下が好ましく、３０ｍＰａ・ｓ以下がより好ましい。なお、前記粘度は、Ｂ型回転粘度計で測定した値である。 The viscosity of the composition of the present invention is preferably 50 mPa · s or less, more preferably 30 mPa · s or less at 20 ° C. from the viewpoint of permeability. The viscosity is a value measured with a B-type rotational viscometer.
本発明の組成物のｐＨは、該組成物を含浸させる建材中の金属部材を防錆する観点から、８.０以上が好ましい。 The pH of the composition of the present invention is preferably 8.0 or more from the viewpoint of rust-proofing the metal member in the building material impregnated with the composition.
また、本発明は、前記組成物をアスベストを含む部材に含浸させる工程を含む、アスベストを含む部材の処理方法に関する。
本発明の処理方法を用いることで、アスベストの飛散を顕著に防止しながら、アスベストを含む部材の除去などを行うことができる。
Moreover, this invention relates to the processing method of the member containing asbestos including the process of impregnating the member containing asbestos with the said composition.
By using the treatment method of the present invention, it is possible to remove a member containing asbestos while remarkably preventing asbestos from being scattered.
本発明において、アスベストを含む部材としては、アスベストが含まれているものであればよく、限定されないが、例えば、スレート（波板、スレート板）、アスベストモルタル（テーリング剤）、石綿板、石綿フェルト、石綿ブラスター、石綿保温材、石綿セメント、パーライト板、ケイ酸カルシウム板、スラグ石膏板、窯業系サイディング、パルプセメント板、住宅屋根用化粧スレート、石膏セメント円筒、木毛セメントなど、アスベストを補強繊維として混合し形成されたものが挙げられる。アスベスト以外の部材成分や、部材の形状などには特に限定はない。 In the present invention, asbestos-containing members are not limited as long as they contain asbestos. For example, slate (corrugated plate, slate plate), asbestos mortar (tailing agent), asbestos plate, asbestos felt Asbestos blaster, asbestos insulation, asbestos cement, pearlite board, calcium silicate board, slag gypsum board, ceramic siding, pulp cement board, residential roof slate, gypsum cement cylinder, wood wool cement, etc. And those formed by mixing. There are no particular limitations on the component other than asbestos, the shape of the member, and the like.
含浸させる手段としては、前記部材を本発明の組成物と接触させる方法であれば特に限定はない。中でも、経済性、簡便性などの観点から、本発明の組成物を部材の表面に吹き付ける方法が好ましい。 The means for impregnation is not particularly limited as long as the member is brought into contact with the composition of the present invention. Of these, the method of spraying the composition of the present invention on the surface of the member is preferable from the viewpoints of economy and simplicity.
吹き付け等により含浸させる組成物の量としては、部材の厚みなどにより一概に限定されないが、吹き付けた場合は部材の表面積１ｍ2あたり、５００〜１０００ｇが好ましく、６００〜８００ｇがより好ましい。
また、吹き付けられる組成物中の樹脂固形分の総量としては、部材の表面積１ｍ2あたり、１０００ｇ以下が好ましく、８００ｇ以下がより好ましい。なお、他の処理条件としては、特に限定はない。
The amount of the composition to be impregnated by spraying or the like is not generally limited by the thickness of the member, but when sprayed, 500 to 1000 g is preferable and 600 to 800 g is more preferable per 1 m 2 of the surface area of the member.
Further, the total amount of resin solids in the composition to be sprayed is preferably 1000 g or less, more preferably 800 g or less, per 1 m 2 of the surface area of the member. Other processing conditions are not particularly limited.
本発明の組成物を部材に吹き付けたり塗布すると本発明の組成物中の樹脂の多くは水と共に速やかに部材内に含浸される。その後、短時間静置することで、部材中のアスベストと他の部材成分とを固着することができる。
また、かかる部材の表面は、従来の飛散防止剤で処理した場合に見られるような可燃性の有機物の厚い膜が形成されないため、アスベストを含む部材が有する耐火性は維持される。
When the composition of the present invention is sprayed or applied to a member, most of the resin in the composition of the present invention is quickly impregnated into the member together with water. Then, asbestos in a member and other member components can be fixed by leaving still for a short time.
Moreover, since the thick film of the combustible organic substance which is seen when the surface of this member is processed with the conventional scattering prevention agent is not formed, the fire resistance which the member containing asbestos has is maintained.
本発明の組成物を用いることで、例えば、アスベストを含む部材を用いた建築物を解体する際にアスベストの飛散を防ぐことができる。また、本発明の組成物を予め部材に吹き付けておくことで、事故や地震など災害により建築物が不意に倒壊した場合でも、アスベストの飛散が顕著に少ないため、アスベストの飛散による二次災害を防ぐことができる。 By using the composition of the present invention, for example, asbestos can be prevented from scattering when a building using a member containing asbestos is dismantled. In addition, by spraying the composition of the present invention on the members in advance, even if the building collapses unexpectedly due to disasters such as accidents and earthquakes, the asbestos scattering is remarkably small, so secondary disasters caused by asbestos scattering Can be prevented.
また、近年、有害な化学物質を吸着する効果や、吸放湿性、脱臭効果、断熱効果などに優れることから、建材としてケイソウ土を含むものがよく使用されているが、建築物の解体時に建材に含まれるケイソウ土の結晶が飛散することでアスベストのようにガンなどの疾患を人体に引き起こす可能性も指摘されている。本発明の組成物は、これらのケイソウ土を含む部材中にも良好に含浸されるものであるため、本発明の組成物をケイソウ土を含む部材に含浸させることで建築物を解体した際のケイソウ土の飛散を防ぐことができる。したがって、本発明の組成物は、ケイソウ土の飛散防止剤としても好適に使用することができるものである。
したがって、本発明の別の態様は、
（１）ポリマー粒子の平均粒子径が０.１μｍ以下のアクリル系樹脂エマルジョンおよび／またはポリマー粒子の平均粒子径が０.１μｍ以下のスチレン−ブタジエン系樹脂エマルジョンを含有するアスベスト・ケイソウ土飛散防止用組成物、
（２）前記アスベスト・ケイソウ土飛散防止用組成物を、アスベストおよび／またはケイソウ土を含む部材に含浸させる工程を含む、アスベストおよび／またはケイソウ土を含む部材の処理方法
に関する。
In recent years, materials containing diatomaceous earth are often used as building materials because they have excellent effects of adsorbing harmful chemical substances, moisture absorption and desorption, deodorization effects, and heat insulation effects. It has been pointed out that the diatomite crystals contained in the slag may cause cancer and other diseases like asbestos in the human body. Since the composition of the present invention is satisfactorily impregnated in the member containing diatomaceous earth, the member containing diatomaceous earth is impregnated with the composition of the present invention to disassemble the building. Can prevent diatomaceous earth from scattering. Therefore, the composition of the present invention can be suitably used as an anti-scattering agent for diatomaceous earth.
Thus, another aspect of the present invention is:
(1) For preventing asbestos diatomaceous earth from containing an acrylic resin emulsion having an average particle diameter of 0.1 μm or less and / or a styrene-butadiene resin emulsion having an average particle diameter of 0.1 μm or less. Composition,
(2) The present invention relates to a method for treating a member containing asbestos and / or diatomaceous earth, comprising the step of impregnating a member containing asbestos and / or diatomaceous earth with the composition for preventing asbestos / diatomaceous earth from scattering.
実施例１〜６、比較例１〜８（ただし、実施例１、２、５、６は参考例である）
表１に記載のポリマー粒子の平均粒子径、固形分を有するように各種樹脂エマルジョンを調整して、組成物を得た。前記組成物を、厚さ２０ｍｍの耐火被覆材（アスベスト吹き付け材）に所定の塗布量となるように吹き付けて静置した（雰囲気温度２０℃で、湿度６５％、乾燥時間２４時間）。
ついで、アスベスト吹き付け材への浸透深さ、表面皮張りの有無を調べて、判定を行った。これらの結果を表１に示す。
Examples 1-6, Comparative Examples 1-8 (However, Examples 1, 2, 5, and 6 are reference examples)
Various resin emulsions were prepared so as to have the average particle size and solid content of the polymer particles described in Table 1 to obtain compositions. The composition was sprayed onto a fire-resistant coating material (asbestos spray material) having a thickness of 20 mm so as to have a predetermined coating amount, and was allowed to stand (atmosphere temperature 20 ° C., humidity 65%, drying time 24 hours).
Subsequently, the depth of penetration into the asbestos spray material and the presence or absence of surface skinning were examined and judged. These results are shown in Table 1.
なお、浸透深さは、前記アスベスト吹き付け材の断面を目視して測定した。 The penetration depth was measured by visually observing a cross section of the asbestos spray material.
また、表面皮張りの有無は、前記アスベスト吹き付け材の表面を目視して評価した。
表中の基準は、
「○」は皮の形成がない
「△」はうっすら皮が見られる
「×」は厚い皮の形成が見られる
を示す。
The presence or absence of surface skinning was evaluated by visually observing the surface of the asbestos spray material.
The criteria in the table are
“◯” indicates no skin formation “Δ” indicates a slight skin formation “×” indicates that a thick skin formation is observed.
また、判定の評価基準については、
「◎」は浸透深さが７ｍｍ以上であり、かつ表面皮張りの評価が○のもの
「○」は浸透深さが７ｍｍ以上であり、かつ表面皮張りの評価が△のもの
「×」は表面皮張りの評価が×のもの
を示す。
In addition, about evaluation criteria of judgment,
“◎” indicates that the penetration depth is 7 mm or more and the evaluation of surface skinning is “Good” “○” indicates that the penetration depth is 7 mm or more and evaluation of surface skinning is “△” The evaluation of surface skinning is x.
表１の結果より、アクリル系樹脂エマルジョンまたはスチレン−ブタジエン系樹脂エマルジョンとも、平均粒子径が０.１μｍ以下のものは、アスベスト吹き付け材の内部へ浸透しやすく、また、表面皮張りのないまたは少ないものであることがわかる（実施例１〜６）。特に、平均粒子径が０．１２μｍ（比較例１、２）、０．２μｍ（比較例３，４）のものに比べると、平均粒子径を０．１μｍ以下とすることで奏される効果の差は顕著であるといえる。なお、実施例１〜６の樹脂エマルジョンをアスベスト吹き付け材に吹き付けると該部材内部に速やかに吸収された。なお、実施例１〜６で得られたアクリル系樹脂エマルジョンまたはスチレン−ブタジエン系樹脂エマルジョンには浸透剤としてジアルキルスルホコハク酸ナトリウムを含有させることができた。 From the results shown in Table 1, both acrylic resin emulsions and styrene-butadiene resin emulsions having an average particle size of 0.1 μm or less are likely to penetrate into the inside of the asbestos spray material, and there is no or little surface skinning. It turns out that it is a thing (Examples 1-6). In particular, when compared with those having an average particle size of 0.12 μm (Comparative Examples 1 and 2) and 0.2 μm (Comparative Examples 3 and 4), the effect of having an average particle size of 0.1 μm or less is achieved. It can be said that the difference is remarkable. In addition, when the resin emulsion of Examples 1-6 was sprayed on the asbestos spray material, it was rapidly absorbed into the member. The acrylic resin emulsion or styrene-butadiene resin emulsion obtained in Examples 1 to 6 could contain sodium dialkylsulfosuccinate as a penetrant.
試験例１〜３
密封された５００ｍｍ立方のアクリル製容器（１方向はフィルム）内上部に石綿捕集用ホルダーを設置し、このフィルム側から手を入れて容器内でスレート波板（１５０ｍｍ×２５９ｍｍ×６ｍｍ）を鉄製ハンマーにて２分間かけ粉砕した後、所定のサンプリング時間で容器内の空気を採取し、石綿濃度を石綿に係る特定粉じんの濃度の測定法（平成元年１２月２７日環境庁告示第９３号）に記載のろ過捕集方法 計数法に基づいて測定した。結果を表２に示す。
なお、試験例１では、スレート波板に樹脂固形分１１％液（実施例３で用いられたものと同じ）を１０５ｇ塗布して室温で乾燥させたもの、試験例２では、スレート波板に樹脂固形分１１％液を７２ｇ塗布して室温で乾燥させたものを用いた。試験例３では、樹脂液を塗布していないものを用いた。
Test Examples 1-3
A holder for collecting asbestos is installed in the upper part of a sealed 500 mm cubic acrylic container (one direction is a film), and a slate corrugated plate (150 mm x 259 mm x 6 mm) is made of iron in this container by putting a hand from the film side. After crushing with a hammer for 2 minutes, the air in the container is collected at a predetermined sampling time, and the asbestos concentration is determined by measuring the concentration of specific dust related to asbestos (December 27, 1989, Environmental Agency Notification No. 93 The filtration and collection method described in) was measured based on the counting method. The results are shown in Table 2.
In Test Example 1, 105 g of a 11% resin solid content liquid (same as that used in Example 3) was applied to the slate corrugated plate and dried at room temperature. In Test Example 2, the slate corrugated plate was coated with slate corrugated plate. 72 g of 11% resin solid content solution was applied and dried at room temperature. In Test Example 3, a resin liquid was not applied.
試験例４〜７
密封された５００ｍｍ立方のアクリル製容器（１方向はフィルム）内にデジタル粉じん計（柴田科学製、「Ｐ−５Ｈ」）を設置し、この容器内で試験品（小：１００ｍｍ×２００ｍｍ×３５ｍｍ、大：２５０ｍｍ×２５０ｍｍ×３５ｍｍ）をフィルム側から手で粉砕し、表２に記載のサンプリング時間での、粉じん濃度を粉じん計で測定した。結果を表２に示す。
なお、試験例４ではロックウールブロック（小）に樹脂固形分２５％液（実施例３で用いられたものと同じ樹脂を用いて、固形分量を２５重量％としたもの）を５００ｇ塗布して室温で乾燥させたもの、試験例６ではロックウールブロック（大）に樹脂固形分２５％液を１０００ｇ塗布して室温で乾燥させたものを用いた。
試験例５、７では樹脂液を塗布していないロックウールブロック（小）、（大）をそれぞれ用いた。
Test Examples 4-7
A digital dust meter (manufactured by Shibata Kagaku, “P-5H”) is installed in a sealed 500 mm cubic acrylic container (film is in one direction), and a test product (small: 100 mm × 200 mm × 35 mm, Large: 250 mm × 250 mm × 35 mm) was manually pulverized from the film side, and the dust concentration at the sampling time shown in Table 2 was measured with a dust meter. The results are shown in Table 2.
In Test Example 4, 500 g of a 25% resin solid content liquid (the same resin used in Example 3 and having a solid content of 25% by weight) was applied to a rock wool block (small). What was dried at room temperature, in Test Example 6, 1000 g of a 25% resin solid content solution was applied to a rock wool block (large) and dried at room temperature.
In Test Examples 5 and 7, rock wool blocks (small) and (large) to which no resin solution was applied were used, respectively.
試験例１〜３の結果より、樹脂液を塗布したスレート波板を粉砕した場合（試験例１、２）、樹脂液を塗布していない場合（試験例３）に比べて空気中の石綿（アスベスト）濃度は測定限界未満であり、実質的には石綿の飛散が見られないことがわかる。
また、試験例４〜７の結果より、樹脂液を塗布したロックウールブロックを破砕した場合（試験例４、６）、樹脂液を塗布していない場合（試験例５、７）に比べて、大、小のサイズとも、粉じん濃度が顕著に低いことがわかる。
From the results of Test Examples 1 to 3, when the slate corrugated sheet coated with the resin liquid was crushed (Test Examples 1 and 2), asbestos in the air (Test Example 3) compared to the case where the resin liquid was not applied (Test Example 3) Asbestos) concentration is less than the limit of measurement, and asbestos scattering is virtually not observed.
Moreover, from the results of Test Examples 4 to 7, when the rock wool block to which the resin liquid was applied was crushed (Test Examples 4 and 6), compared to the case where the resin liquid was not applied (Test Examples 5 and 7), It can be seen that the dust concentration is significantly low for both large and small sizes.
試験例８、９
密封された５００ｍｍ立方のアクリル製容器（１方向はフィルム）内上部に石綿捕集用ホルダーを設置し、容器内でスレート波板（１５０ｍｍ×２５９ｍｍ×６ｍｍ）２枚を手でこすり合わせた後、容器内の石綿濃度を測定した。
試験例８ではスレート波板に樹脂固形分１１％液（実施例３で用いられたものと同じ）１００ｇを塗布し、室温で乾燥させたものを用いた。試験例９では樹脂液を塗布していないものを用いた。また石綿濃度の測定方法には、試験例１〜３と同じ方法を採用した（ろ過捕集法・計数法）。これらの結果を表３に示す。
Test Examples 8 and 9
After installing a holder for collecting asbestos in the upper part of a sealed 500 mm cubic acrylic container (one direction is film), and rubbing two slate corrugated plates (150 mm × 259 mm × 6 mm) by hand in the container, The concentration of asbestos in the container was measured.
In Test Example 8, 100 g of a 11% resin solid content liquid (same as that used in Example 3) was applied to a slate corrugated plate and dried at room temperature. In Test Example 9, a resin liquid was not applied. Moreover, the same method as Test Examples 1-3 was employ | adopted for the measuring method of asbestos density | concentration (filtration collection method / counting method). These results are shown in Table 3.
表３の結果より、樹脂液を塗布したスレート波板をこすりあわせた後の石綿濃度は、塗布していないものに比べて顕著に低いことがわかる。また、こすり合わせた感じは、樹脂液を塗布したものの方が硬く、スレート波板同士を強い力でこすり合わせないとスレート波板を崩すことはできなかった。 From the results in Table 3, it can be seen that the asbestos concentration after rubbing the slate corrugated sheet coated with the resin liquid is significantly lower than that of the uncoated sheet. Also, the feeling of rubbing was harder when the resin liquid was applied, and the slate corrugated sheet could not be broken unless the slate corrugated sheets were rubbed together with a strong force.
試験例１〜９の結果より、本発明の組成物を石綿やロックウールなどを含有する部材に塗布などで供することで、部材が粉砕されても、石綿などの粉じん発生量が顕著に抑えられることがわかる。
また、試験例１、２、４、６、８において、樹脂液を塗布して得られたスレート波板などの部材の表面には樹脂の皮膜は見られなかった。同様に、これらの樹脂液は、ケイソウ土を含む部材に塗布しても吸収された。
From the results of Test Examples 1 to 9, by applying the composition of the present invention to a member containing asbestos, rock wool, or the like, even if the member is pulverized, the generation amount of dust such as asbestos is remarkably suppressed. I understand that.
In Test Examples 1, 2, 4, 6, and 8, no resin film was observed on the surface of a member such as a slate corrugated plate obtained by applying a resin solution. Similarly, these resin solutions were absorbed even when applied to members containing diatomaceous earth.
本発明の組成物は、アスベストやケイソウ土を含む部材を用いた建築物などの解体作業、補強処理などに好適に使用される。
The composition of the present invention is suitably used for dismantling work such as a building using a member containing asbestos or diatomaceous earth, reinforcing treatment, and the like.
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