JP2004285658A - Building interior finishing material - Google Patents
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Abstract
Description
【０００１】
【発明の属する技術分野】
本発明は、熱可塑性樹脂組成物からなる建築内装材に関し、特に、揮発性有機化合物（以下、ＶＯＣと云う）の発生量を著しく低減させた熱可塑性樹脂組成物からなる建築内装材に関するものである。
【０００２】
【従来の技術】
従来より、熱可塑性樹脂材からなる建築内装材が広く使用されているが、最近では、これらの熱可塑性樹脂からなる建築内装材から放散されるＶＯＣがいわゆるシックハウス症候群を誘発する物質として、その対策が社会的課題となっている。シックハウス症候群とみられる症状が発生した公立大の特定校舎において、ＤＥＨＰ（ジ−２エチルヘキシルフタレート）の分解物質である２−エチル−１−ヘキサノールが高濃度で検出された事例が報告されている（例えば、非特許文献１参照。）。
また、特殊な分野ではあるが、例えばクリーンルーム用としては従来から揮発性分を存在させないポリ塩化ビニルの建築部材が提案されている（特許文献１参照。）。しかし、ここで使用されるポリ塩化ビニル樹脂に添加された可塑剤について、その分子量が４００以上であるとしたもので可塑剤自体の揮発性を問題としているだけで、シックハウス症候群対策ではない。
【０００３】
【非特許文献１】
日本経済新聞「２００３年２月２日発行 １３版 社会３４」
【特許文献１】
特開平９−９５５８１号公報
【０００４】
【発明が解決しようとする課題】
本発明が解決しようとするシックハウス症候群対策は、厚生省により２０００年１２月１５日に策定されたＴＶＯＣ（総ＶＯＣ）の室内濃度指針値における暫定目標値である室内濃度４００（μｇ／ｍ３）以下を満足させようとするものである。
【０００５】
そこで本発明者等は、ＶＯＣの成分ついて鋭意研究した結果、熱可塑性樹脂からなる建築内装材より放散されるＶＯＣは比較的低分子量のものであり、その多くは建築内装材の成形時に使用される熱可塑性樹脂組成物中に含まれる物質であり、具体的には、柔軟性を付与させるために添加するエステル結合を有する可塑剤の未反応残留アルコール分や、成形加工を容易にするための安定剤や加工助剤に含まれる有機溶剤等の有機化合物、更には建築内装材の表面保護の目的で使用される表面処理剤に含まれる有機溶剤成分などがＶＯＣの発生に大きく影響することを突き止めた。
熱可塑性樹脂組成物に添加する添加剤で、沸点が７５〜２４０℃の有機化合物を実質的に含まないとは、添加剤の有効成分として上記沸点が７５〜２４０℃の範囲にある有機化合物を含まないことであり、すなわち、不純物として混入する沸点が７５℃〜２４０℃の範囲にある有機化合物の熱可塑性樹脂組成物中での含有量を概ね２０ｐｐｍ以下にすることで、上記厚生省策定の指針値を達成できることを見いだし、本発明を完成するに至った。
【０００６】
本発明の目的とするところは、ＶＯＣの発生量を著しく低減させ、厚生省が策定したＴＶＯＣ（総ＶＯＣ）の室内濃度指針値４００（μｇ／ｍ３）以下を満足させることができる熱可塑性樹脂組成物からなる建築内装材を提供することにある。
【０００７】
【課題を解決するための手段】
上記の目的を達成する本発明の請求項１に係る建築用内装材は、沸点が７５〜２４０℃の有機化合物を実質的に含まない熱可塑性樹脂組成物からなることを特徴としたものである。
また、本発明の請求項２に係る建築用内装材は、熱可塑性樹脂にエステル結合を有する可塑剤を配合した熱可塑性樹脂組成物からなる建築内装材であって、該可塑剤中の残留アルコール濃度が５０ｐｐｍ以下であることを特徴とするものである。
そして、本発明の請求項３に係る建築用内装材は、熱可塑性樹脂が塩化ビニル系樹脂であることを特徴とするものである。
更に、本発明の請求項４に係る建築用内装材は、熱可塑性樹脂組成物の表面に沸点が７５〜２４０℃である有機溶剤を実質的に含まない水性樹脂系処理剤を塗工してなることを特徴としたものである。
【０００８】
【発明の実施の形態】
以下、本発明の好適実施の形態を詳細に説明する。
本発明でいう熱可塑性樹脂組成物からなる建築内装材の例としては、床材、壁装材、天井材、巾木、仕切材等を挙げることが出来る。これらの建築内装材は、カレンダー法、押出し法、コーティング法、射出成形法等の公知の手段により、所望の形と厚さに成形することができ、さらに使用する目的に応じて印刷、転写などの方法による意匠を付け加えることも可能である。また、同じく意匠付与或いは用途に応じた機能性付与のために、熱可塑性樹脂組成物に他の材料を加えることも可能である。
【０００９】
本発明に係る建築内装材を構成する熱可塑性樹脂としては、塩化ビニル系樹脂等の含ハロゲン系樹脂、ポリエチレン、ポリプロピレン、エチレン−酢酸ビニル共重合体、エチレン−（メタ）アクリル酸エステル共重合体等のオレフィン系樹脂、アクリル系樹脂、ウレタン系樹脂、オレフィン系、スチレン系、アクリル系、ポリエステル系、ウレタン系等の熱可塑性エラストマー、合成ゴム等から選ばれた１種又は２種以上を混合してなる合成樹脂等を挙げる事が出来る。
上記熱可塑性樹脂の中で、加工性、耐久性、コストを考慮すると塩化ビニル系樹脂が好ましい。
【００１０】
上記熱可塑性樹脂には、通常建築内装材を構成する熱可塑性樹脂に添加される可塑剤、安定剤、加工助剤、充填剤、紫外線吸収剤、難燃剤、帯電防止剤などの添加剤を添加することができる。但し、本発明では、沸点が７５〜２４０℃の範囲、好ましくは沸点が６８〜２９０℃の範囲にある有機化合物を実質的に含まない添加剤を選択する必要がある。
【００１１】
本発明に適用可能な可塑剤としては、ジ−２−エチルヘキシルフタレート（ＤＥＨＰ、通称ＤＯＰ），ジイソノニルフタレート（ＤＩＮＰ）、ジイソデシルフタレート（ＤＩＤＰ）、ジウンデシルフタレート（ＤＵＰ）などのフタル酸エステル、ジ−２−エチルヘキシルセバケート（ＤＥＨＳ、通称ＤＯＳ）、ジイソデシルアジペート（ＤＩＤＡ）などの二塩基性脂肪酸エステル、トリクレジルフォスフェート（ＴＣＰ）などのリン酸エステル、エポキシ系可塑剤、ポリエステル系可塑剤等を挙げることができ、これらを単独で使用しても２種以上を複合して使用してもよい。
可塑剤は他の添加剤と比較して熱可塑性樹脂に対する添加量が多く、且つその不純物の大部分は残留アルコールであり、ＶＯＣに大きな影響を与えるため、可塑剤中の残留アルコールの含有量を５０ｐｐｍ以下とすることが好ましい。ＶＯＣとして検出される残留アルコールは使用する可塑剤によって異なるが、例えば、可塑剤がＤＯＰやＤＯＳの場合は、残留アルコールは２−エチルヘキシルアルコール（沸点：１８３．５℃）であり、ＤＩＤＰではイソデシルアルコール（沸点：２２０℃）である。
【００１２】
また、熱可塑性樹脂に添加する安定剤としては、バリウム、カルシウム、マグネシウム、アルミニウム、亜鉛などの金属石鹸系安定剤、錫系安定剤、酸化防止剤、キレーター、等を挙げることができ、これらは単独で使用しても２種以上を複合して使用してもよい。
この種の安定剤は、その性状から粉末安定剤、顆粒状安定剤、液状安定剤などに分類され、その中で液状安定剤は通常、固形の安定剤成分を溶剤で溶解し液状にして使用されるため、液状に溶解するのに用いる溶剤がＶＯＣに大きな影響を及ぼすことになるので、沸点が７５〜２４０℃の有機化合物（溶剤）を実質的に含まないものを選択する必要がある。
【００１３】
一般の建築内装材においてＶＯＣとして検出される主な有機化合物のうち、安定剤などの添加剤由来のものは、キシレン（沸点：１３８℃）、ジエチレングリコールジメチルエーテル（沸点：１６０℃）、デカン（沸点：１７４℃）、トリデカン（沸点：２３５℃）、アセトフェノン（沸点：２０２℃）などがあり、これらの有機化合物の沸点は７５〜２４０℃の範囲のものであるので、これらの有機化合物を実質的に含まない安定剤を選択することが重要である。
【００１４】
更に、上記熱可塑性樹脂組成物の表面を保護するために塗工される表面処理剤としては、ウレタン系、アクリル系等の水性樹脂系表面処理剤を挙げることができる。
溶剤系の表面処理剤を使用すると多量のＶＯＣが発生してしまうため水性樹脂系表面処理剤を用いなければならない。水性樹脂系表面処理剤にも有機溶剤が添加されている場合があり、沸点が７５〜２４０℃の範囲にある有機溶剤など有機化合物、例えば酢酸エチル（沸点：７７．１℃）、ＭＥＫ（メチルエチルケトン沸点：７９．６℃）、トルエン（沸点：１１０．６℃）、ＭＩＢＫ（メチルイソブチルケトン 沸点：１１６℃）、Ｎ−メチルピロリドン（沸点：２０４℃）などを含有するものは避けなければならない。
【００１５】
通常、沸点が１００℃以下の低沸点の有機化合物は熱可塑性樹脂組成物の加工中に揮散するものと考えられがちであるが、沸点が７７．１℃の酢酸エチルでもＶＯＣとして検出されてしまう。逆に、沸点が２００℃を越える高沸点の有機化合物は室温では揮発しないものと考えられがちであるが、沸点が２３５℃のトリデカンでもＶＯＣとして検出されてしまう。従って、建築内装材を形成する熱可塑性樹脂組成物に添加する添加剤としては、沸点が７５〜２４０℃の範囲にある有機化合物を実質的に含有しないものを選択することが重要である。
沸点が７５℃未満のものであれば熱可塑性樹脂組成物の加工工程中に揮散して容易に除去出来るし、沸点が２４０℃より高いのものであれば室温程度の温度における揮発量が極めて少なく、ＶＯＣの大きな原因とはならないからである。
熱可塑性樹脂製建築内装材においてＶＯＣの原因となるこれらの有機化合物を、製品の品質向上または成形加工を容易にするのに必要欠くことの出来ないものと、添加剤の製造の際に不純物として混入してくるものとに分けた場合、沸点が７５〜２４０℃の範囲にある有機化合物の熱可塑性樹脂組成物中での含有濃度を概ね２０ｐｐｍ以下とするためには、添加剤そのものに由来する場合には他の有機化合物で置き換えることにより、また添加剤そのものに由来しない場合には添加剤製造の際に混入又は副生する不純物について制限（精製過程などで除去）することではじめて、沸点が７５℃〜２４０℃の有機化合物を実質的に含まない熱可塑性樹脂組成物を得ることが可能となる。
【００１６】
【実施例】
以下、具体的な実施例を挙げ、本発明を更に詳細に説明するが、本発明は実施例のものに限定されるものではない。
＜熱可塑性樹脂組成物からなる建築内装材の作成＞
表１の実施例１〜４及び表２の比較例１〜５に示す配合からなる塩化ビニル樹脂系組成物を用いて、加工温度１８０℃でカレンダー加工により厚さ２．０ｍｍの床材用シートを作成した。
得られた床材用シートの表面に、表１の実施例及び表２の比較例に示す水性ウレタン系表面処理剤をグラビヤ印刷にて塗工した。
＜ＶＯＣ発生量の評価＞
ＪＩＳ Ａ１９０１「建築材料の揮発性有機化合物（ＶＯＣ）、ホルムアルデヒド及び他のカルボニル化合物放散測定法」に準拠して、総揮発性有機化合物（ＴＶＯＣ）の測定を行った。
なお、評価を行なった小型チャンバー（ＡＤＴＥＣ社製）は容量０．０２ｍ３のものを使用し、試験条件としは、温度２８±０．５℃、相対湿度５０±５％、換気回数０．５±０．０５回／ｈ、試料負荷率２．２ｍ２／ｍ３で行ない、試験開始から７日後の放散速度（μｇ／ｍ２・ｈ）を測定した。
更に、床面積１ｍ２、高さ２．４ｍの室内において、床面、壁面及び天井面を合わせた６面からＶＯＣが得られた放散速度（μｇ／ｍ２・ｈ）で発生したとし、室内を５時間密閉状態とした場合の室内濃度を算定した。添加剤中の有機溶剤はガスクロマトグラフを用いて同定し定量した。
【００１７】
【表１】
＊２；Ｂａ−Ｚｎ系液状安定剤（溶剤の沸点範囲；３００〜３５０℃）
＊３；沸点が７５〜２４０℃の有機化合物を含有しない水性ウレタン系処理剤
【００１８】
【表２】
＊５；Ｎ−メチル−２−ピロリドン１０％水性ウレタン系処理剤
【００１９】
実施例１、２、３及び比較例１、２の比較から、最も汎用性の高い可塑剤であるＤＯＰを用いた塩化ビニル樹脂組成物からなる建築内装材において、残留アルコールである２−エチルヘキシルアルコール含有量がトータルＶＯＣに大きく影響していることが明らかであり、含有量を５０ｐｐｍ以下とすることで暫定目標室内濃度４００（μｇ／ｍ３）以下となることがわかる。
また、実施例１と比較例３の比較から、沸点が７５〜２４０℃である有機溶剤を含んだ液状安定剤を添加した場合には暫定目標室内濃度４００（μｇ／ｍ３）以下を満足することができないことがわかる。
そして、比較例４の表面処理した建築内装材において、沸点が７５〜２４０℃である有機化合物を含まない表面処理剤を用いた場合であっても、処理前の塩化ビニル樹脂組成物の影響により暫定目標室内濃度４００（μｇ／ｍ３）以下を満足することができないことがわかる。
更に、比較例５が示すように、表面処理した建築内装材において、沸点が７５〜２４０℃である有機化合物を含む表面処理剤（沸点が２０４℃のＮ−メチル−２−ピロリドンを１０％含有）で処理した場合には暫定目標室内濃度４００（μｇ／ｍ３）以下を満足することができないことがわかる。
【００２０】
【発明の効果】
本発明に係る請求項１に記載の建築内装材によれば、沸点が７５〜２４０℃の有機化合物を実質的に含まない熱可塑性樹脂組成物からなるので、ＶＯＣの発生量を著しく低減させ、厚生省が策定したＴＶＯＣ（総ＶＯＣ）の室内濃度指針値４００（μｇ／ｍ３）以下を満足させることが出来る。
また、請求項２に記載の建築内装材によれば、熱可塑性樹脂組成物における可塑剤中の残留アルコール濃度を５０ｐｐｍ以下としたので、ＶＯＣの発生量を著しく低減させ、厚生省が策定したＴＶＯＣ（総ＶＯＣ）の室内濃度指針値４００（μｇ／ｍ３）以下を満足させることが出来る。
しかも、請求項４に記載の建築内装材によれば、請求項１または２に記載の熱可塑性樹脂組成物の表面に、沸点が７５〜２４０℃である有機溶剤を実質的に含まない水性樹脂系処理剤を塗工してなるので、同様に厚生省が策定したＴＶＯＣの室内濃度指針値４００（μｇ／ｍ３）以下を満足させることが可能となる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a building interior material made of a thermoplastic resin composition, and more particularly to a building interior material made of a thermoplastic resin composition in which the amount of volatile organic compounds (hereinafter referred to as VOC) is significantly reduced. is there.
[0002]
[Prior art]
Conventionally, architectural interior materials made of thermoplastic resin materials have been widely used, but recently, VOCs emitted from architectural interior materials made of these thermoplastic resins are the countermeasures against the so-called sick house syndrome. Has become a social issue. A case where a high concentration of 2-ethyl-1-hexanol, which is a degradation substance of DEHP (di-2-ethylhexyl phthalate), has been reported in a specific school building at a public university where symptoms considered to be sick house syndrome have occurred (for example, Non-patent document 1).
In addition, although it is a special field, for example, a construction member made of polyvinyl chloride that does not contain volatile components has been proposed for use in a clean room (see Patent Document 1). However, the plasticizer added to the polyvinyl chloride resin used here is assumed to have a molecular weight of 400 or more, and only the volatility of the plasticizer itself is a problem, and is not a countermeasure against sick house syndrome.
[0003]
[Non-Patent Document 1]
Nihon Keizai Shimbun "Society 34, published February 2, 2003"
[Patent Document 1]
Japanese Patent Laid-Open No. 9-95581
[Problems to be solved by the invention]
The sick house syndrome countermeasure to be solved by the present invention is an indoor concentration of 400 (μg / m 3 ) or less, which is a provisional target value in the TVOC (total VOC) indoor concentration guideline value formulated on December 15, 2000 by the Ministry of Health and Welfare. Is to satisfy.
[0005]
Thus, as a result of intensive studies on the components of VOCs, the present inventors have found that VOCs emitted from building interior materials made of thermoplastic resins have a relatively low molecular weight, and many of them are used when molding building interior materials. Specifically, it is a substance contained in the thermoplastic resin composition, specifically, for the unreacted residual alcohol content of the plasticizer having an ester bond to be added for imparting flexibility and for facilitating the molding process. Organic compounds such as organic solvents contained in stabilizers and processing aids, as well as organic solvent components contained in surface treatment agents used for the purpose of protecting the surface of building interior materials, greatly affect the generation of VOCs. I found it.
An additive to be added to the thermoplastic resin composition that does not substantially contain an organic compound having a boiling point of 75 to 240 ° C. means that the organic compound having a boiling point of 75 to 240 ° C. is used as an active ingredient of the additive. In other words, the content of the organic compound in the thermoplastic resin composition having a boiling point in the range of 75 ° C. to 240 ° C. in the range of about 20 ppm or less is included as an impurity. The inventors have found that values can be achieved and have completed the present invention.
[0006]
The object of the present invention is to significantly reduce the amount of VOC generated and to satisfy the TVOC (total VOC) indoor concentration guideline value 400 (μg / m 3 ) or less established by the Ministry of Health and Welfare. It is to provide architectural interior materials made of objects.
[0007]
[Means for Solving the Problems]
The building interior material according to claim 1 of the present invention that achieves the above object is characterized by comprising a thermoplastic resin composition substantially free of an organic compound having a boiling point of 75 to 240 ° C. .
Moreover, the building interior material according to claim 2 of the present invention is a building interior material comprising a thermoplastic resin composition in which a thermoplastic resin is blended with a plasticizer having an ester bond, and residual alcohol in the plasticizer. The concentration is 50 ppm or less.
The architectural interior material according to claim 3 of the present invention is characterized in that the thermoplastic resin is a vinyl chloride resin.
Furthermore, the architectural interior material according to claim 4 of the present invention is obtained by applying an aqueous resin treatment agent substantially free of an organic solvent having a boiling point of 75 to 240 ° C. to the surface of the thermoplastic resin composition. It is characterized by becoming.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail.
Examples of building interior materials made of the thermoplastic resin composition according to the present invention include floor materials, wall covering materials, ceiling materials, baseboards, partition materials, and the like. These building interior materials can be formed into a desired shape and thickness by known means such as a calendar method, an extrusion method, a coating method, an injection molding method, and further, printing, transfer, etc. according to the purpose of use It is also possible to add a design by this method. Similarly, other materials can be added to the thermoplastic resin composition in order to impart design or functionality depending on the application.
[0009]
Examples of the thermoplastic resin constituting the building interior material according to the present invention include halogen-containing resins such as vinyl chloride resins, polyethylene, polypropylene, ethylene-vinyl acetate copolymers, and ethylene- (meth) acrylic ester copolymers. 1 type or 2 types or more selected from thermoplastic elastomers such as olefin resins such as olefin resins, acrylic resins, urethane resins, olefins, styrenes, acrylics, polyesters, urethanes, synthetic rubbers, etc. And synthetic resins.
Among the thermoplastic resins, vinyl chloride resin is preferable in consideration of processability, durability, and cost.
[0010]
Additives such as plasticizers, stabilizers, processing aids, fillers, UV absorbers, flame retardants, antistatic agents, etc. that are usually added to the thermoplastic resins that make up building interior materials are added to the above thermoplastic resins can do. However, in the present invention, it is necessary to select an additive that substantially does not contain an organic compound having a boiling point in the range of 75 to 240 ° C, preferably in the range of 68 to 290 ° C.
[0011]
Examples of the plasticizer applicable to the present invention include phthalic acid esters such as di-2-ethylhexyl phthalate (DEHP, commonly called DOP), diisononyl phthalate (DINP), diisodecyl phthalate (DIDP), diundecyl phthalate (DUP), and di- Dibasic fatty acid esters such as 2-ethylhexyl sebacate (DEHS, commonly known as DOS), diisodecyl adipate (DIDA), phosphate esters such as tricresyl phosphate (TCP), epoxy plasticizers, polyester plasticizers, etc. These may be used, and these may be used alone or in combination of two or more.
Compared with other additives, the plasticizer is added to the thermoplastic resin in a large amount, and most of the impurities are residual alcohol, which greatly affects VOC. Therefore, the content of residual alcohol in the plasticizer is reduced. 50 ppm or less is preferable. The residual alcohol detected as VOC differs depending on the plasticizer used. For example, when the plasticizer is DOS or DOS, the residual alcohol is 2-ethylhexyl alcohol (boiling point: 183.5 ° C.), and DIDP uses isodecyl. Alcohol (boiling point: 220 ° C.).
[0012]
Examples of the stabilizer added to the thermoplastic resin include metal soap stabilizers such as barium, calcium, magnesium, aluminum, and zinc, tin stabilizers, antioxidants, chelators, and the like. They may be used alone or in combination of two or more.
This type of stabilizer is classified by its properties into powder stabilizer, granular stabilizer, liquid stabilizer, etc. Among them, the liquid stabilizer is usually used by dissolving a solid stabilizer component with a solvent to form a liquid. Therefore, since the solvent used for dissolving in a liquid state has a great influence on the VOC, it is necessary to select one that does not substantially contain an organic compound (solvent) having a boiling point of 75 to 240 ° C.
[0013]
Among the main organic compounds detected as VOC in general building interior materials, those derived from additives such as stabilizers are xylene (boiling point: 138 ° C), diethylene glycol dimethyl ether (boiling point: 160 ° C), decane (boiling point: 174 ° C.), tridecane (boiling point: 235 ° C.), acetophenone (boiling point: 202 ° C.), etc., and the boiling point of these organic compounds is in the range of 75-240 ° C. It is important to select stabilizers that do not contain.
[0014]
Furthermore, examples of the surface treatment agent applied to protect the surface of the thermoplastic resin composition include water-based surface treatment agents such as urethane and acrylic.
When a solvent-based surface treatment agent is used, a large amount of VOC is generated, so an aqueous resin-based surface treatment agent must be used. An organic solvent may also be added to the aqueous resin surface treatment agent, and an organic compound such as an organic solvent having a boiling point in the range of 75 to 240 ° C., for example, ethyl acetate (boiling point: 77.1 ° C.), MEK (methyl ethyl ketone) Boiling points: 79.6 ° C., toluene (boiling point: 110.6 ° C.), MIBK (methyl isobutyl ketone boiling point: 116 ° C.), N-methylpyrrolidone (boiling point: 204 ° C.) and the like must be avoided.
[0015]
Normally, low boiling point organic compounds having a boiling point of 100 ° C. or less tend to be considered to be volatilized during the processing of the thermoplastic resin composition, but even ethyl acetate having a boiling point of 77.1 ° C. is detected as VOC. . Conversely, organic compounds having a boiling point exceeding 200 ° C. tend to be considered not to volatilize at room temperature, but tridecane having a boiling point of 235 ° C. is also detected as VOC. Therefore, it is important to select an additive that does not substantially contain an organic compound having a boiling point in the range of 75 to 240 ° C. as an additive to be added to the thermoplastic resin composition forming the building interior material.
If the boiling point is less than 75 ° C., it can be easily removed by volatilization during the processing step of the thermoplastic resin composition. If the boiling point is higher than 240 ° C., the volatilization amount at a temperature around room temperature is extremely small. This is because it is not a major cause of VOC.
These organic compounds that cause VOC in building interior materials made of thermoplastic resin are indispensable for improving product quality or facilitating molding, and as impurities in the production of additives. In order to make the content concentration of the organic compound having a boiling point in the range of 75 to 240 ° C. in the thermoplastic resin composition approximately 20 ppm or less, it is derived from the additive itself. In some cases, the boiling point can only be reached by replacing with other organic compounds, and if it is not derived from the additive itself, it limits the impurities that are mixed or by-produced during the manufacture of the additive (removal in the purification process). It becomes possible to obtain a thermoplastic resin composition substantially free of an organic compound at 75 ° C. to 240 ° C.
[0016]
【Example】
EXAMPLES Hereinafter, although a specific Example is given and this invention is demonstrated in detail, this invention is not limited to the thing of an Example.
<Creation of building interior material made of thermoplastic resin composition>
A sheet for flooring having a thickness of 2.0 mm by calendering at a processing temperature of 180 ° C., using a vinyl chloride resin-based composition having the composition shown in Examples 1 to 4 in Table 1 and Comparative Examples 1 to 5 in Table 2. It was created.
On the surface of the obtained sheet for flooring, the aqueous urethane type surface treating agent shown in the examples of Table 1 and the comparative examples of Table 2 was applied by gravure printing.
<Evaluation of VOC generation amount>
The total volatile organic compound (TVOC) was measured in accordance with JIS A1901 “Measurement method for emission of volatile organic compounds (VOC), formaldehyde and other carbonyl compounds in building materials”.
The evaluated small chamber (manufactured by ADTEC) has a capacity of 0.02 m 3 and the test conditions are a temperature of 28 ± 0.5 ° C., a relative humidity of 50 ± 5%, and a ventilation rate of 0.5. The test was performed at ± 0.05 times / h and the sample loading rate of 2.2 m 2 / m 3 , and the emission rate (μg / m 2 · h) after 7 days from the start of the test was measured.
Furthermore, in a room with a floor area of 1 m 2 and a height of 2.4 m, it is assumed that VOCs were generated at a diffusion rate (μg / m 2 · h) from which the VOC was obtained from the six surfaces including the floor, wall and ceiling. The indoor concentration in the case of being sealed for 5 hours was calculated. The organic solvent in the additive was identified and quantified using a gas chromatograph.
[0017]
[Table 1]
* 2 ; Ba-Zn liquid stabilizer (boiling point range of solvent; 300 to 350 ° C)
* 3 : Aqueous urethane-based treatment agent not containing an organic compound having a boiling point of 75 to 240 ° C.
[Table 2]
* 5 : N-methyl-2-pyrrolidone 10% aqueous urethane treatment agent
From the comparison of Examples 1, 2, 3 and Comparative Examples 1 and 2, 2-ethylhexyl alcohol which is residual alcohol in a building interior material composed of a vinyl chloride resin composition using DOP which is the most versatile plasticizer It is clear that the content greatly affects the total VOC, and it can be seen that when the content is 50 ppm or less, the provisional target indoor concentration is 400 (μg / m 3 ) or less.
Further, from the comparison between Example 1 and Comparative Example 3, when a liquid stabilizer containing an organic solvent having a boiling point of 75 to 240 ° C. is added, the provisional target indoor concentration 400 (μg / m 3 ) or less is satisfied. I can't understand.
And even if it is a case where the surface treatment agent which does not contain the organic compound whose boiling point is 75-240 degreeC is used in the surface-treated building interior material of the comparative example 4, by the influence of the vinyl chloride resin composition before a process. It can be seen that the provisional target indoor concentration of 400 (μg / m 3 ) or less cannot be satisfied.
Further, as shown in Comparative Example 5, in the surface-treated building interior material, the surface treatment agent containing an organic compound having a boiling point of 75 to 240 ° C (containing 10% of N-methyl-2-pyrrolidone having a boiling point of 204 ° C) ), The provisional target indoor concentration of 400 (μg / m 3 ) or less cannot be satisfied.
[0020]
【The invention's effect】
According to the building interior material according to claim 1 of the present invention, since it consists of a thermoplastic resin composition that does not substantially contain an organic compound having a boiling point of 75 to 240 ° C., the generation amount of VOC is significantly reduced, The TVOC (total VOC) indoor concentration guideline value 400 (μg / m 3 ) or less established by the Ministry of Health and Welfare can be satisfied.
Further, according to the building interior material according to claim 2, since the residual alcohol concentration in the plasticizer in the thermoplastic resin composition is 50 ppm or less, the amount of VOC generated is significantly reduced, and the TVOC ( The indoor concentration guideline value 400 (μg / m 3 ) or less of the total VOC) can be satisfied.
And according to the building interior material of Claim 4, the aqueous resin which does not contain the organic solvent whose boiling point is 75-240 degreeC substantially on the surface of the thermoplastic resin composition of Claim 1 or 2 Since the system treatment agent is applied, the TVOC indoor concentration guideline value 400 (μg / m 3 ) or less established by the Ministry of Health and Welfare can be satisfied.
Claims (4)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003077821A JP4642324B2 (en) | 2003-03-20 | 2003-03-20 | Architectural interior materials |
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| JP2003077821A JP4642324B2 (en) | 2003-03-20 | 2003-03-20 | Architectural interior materials |
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| JP4642324B2 JP4642324B2 (en) | 2011-03-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH061862A (en) * | 1992-06-18 | 1994-01-11 | Chisso Corp | Interior finishing material for building made from vinyl chloride resin |
| JPH1087932A (en) * | 1996-09-18 | 1998-04-07 | Mitsubishi Chem Corp | Vinyl chloride-based resin composition for packaging food |
| JP2002322424A (en) * | 2001-04-25 | 2002-11-08 | Takeda Chem Ind Ltd | Paint composition |
| JP2003301385A (en) * | 2002-04-05 | 2003-10-24 | Okamoto Ind Inc | Wall paper |
-
2003
- 2003-03-20 JP JP2003077821A patent/JP4642324B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH061862A (en) * | 1992-06-18 | 1994-01-11 | Chisso Corp | Interior finishing material for building made from vinyl chloride resin |
| JPH1087932A (en) * | 1996-09-18 | 1998-04-07 | Mitsubishi Chem Corp | Vinyl chloride-based resin composition for packaging food |
| JP2002322424A (en) * | 2001-04-25 | 2002-11-08 | Takeda Chem Ind Ltd | Paint composition |
| JP2003301385A (en) * | 2002-04-05 | 2003-10-24 | Okamoto Ind Inc | Wall paper |
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| JP4642324B2 (en) | 2011-03-02 |
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