JP4603119B2 - Foamed resin molded body impregnated with impregnation additive and impregnation method - Google Patents
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【０００１】
【技術分野】
本発明は，防虫・防蟻，耐熱，難燃，着色等の性質を付与するために含浸添加物を含浸させた発泡樹脂成形体及び含浸方法に関し，特に，建築物の断熱材・保温材等として用いられる発泡樹脂成形体に防虫・防蟻性を付与する方法に関する。
【０００２】
【従来技術】
従来より，防虫・防蟻，耐熱，難燃，着色等の性質を発泡樹脂成形体に付与するために，これらの性質を発揮し得る添加物を発泡樹脂成形体に付着させることが行われている。例えば，特開平１０−３６５４９号，特開平３−２０２５２８号に開示されているように，防蟻剤を発泡樹脂成形体に付与する技術が開示されている。
かかる所望の性質を発泡樹脂成形体に付与する方法としては，所望の効果を付与する含浸添加物を，▲１▼重合時に添加する方法，▲２▼発泡成形時に添加する方法，▲３▼発泡樹脂成形体に直接添加する方法等が一般に知られている。
【０００３】
▲２▼の方法としては，特開平１０−３６５４９号のように発泡樹脂粒子に防蟻剤と接着剤を噴霧する方法，特開平３−２０２５２８号のように，発泡前の発泡性樹脂粒子と防蟻剤を混合して発泡成形する方法等が知られている。
▲３▼の方法としては，特開平３−２０２５２８号のように，発泡樹脂成形体を防蟻剤処理溶液に浸漬させる方法，発泡樹脂成形体の表面に防蟻剤を塗布する方法等が知られている。
【０００４】
【解決しようとする課題】
しかしながら，上記▲１▼の重合時に添加する方法は，膨大な専用設備を必要とするため製造コストが多大となり，経済的ではない。またこの方法では，良好な性質を発揮させるためには含浸添加物を多量に添加する必要があり，そのため得られた発泡樹脂成形体の機械的強度が著しく低下するという問題がある。特に防虫・防蟻性を発泡樹脂成形体に付与するためには，添加物としての防虫・防蟻剤の混合割合を多くする必要があり，そのため得られた発泡樹脂成形体の機械的強度が著しく低下するという問題がある。
【０００５】
また▲２▼の発泡成形時に添加する方法でも，専用の発泡成形設備を必要とするため製造コストが多大となり，経済的でない。また添加物が，成形時に発泡樹脂成形体の熱融着の阻害剤となる。そのため得られた発泡樹脂成形体の機械的強度が著しく低下するという問題がある。
【０００６】
一方，▲３▼の発泡樹脂成形体に直接添加する方法では，これらの方法は，▲１▼，▲２▼の方法に比べて専用の設備を必要としないため経済的である。
しかし，添加物は，発泡樹脂成形体の表面に付着するだけで，内部の発泡粒子の間隙までは充分に含浸分散しない。またその付着力も弱い。そのため表面から添加物が離脱し易く，その性質を長期間持続することができないという問題がある。
【０００７】
本発明はかかる従来の問題点に鑑み，発泡樹脂成形体に，専用設備を用いることなく経済的で簡単に防虫・防蟻，耐熱，難燃，着色等の所望の性質を付与でき，またその性質を長期間保持することができる，含浸添加物が含浸された発泡樹脂成形体及び含浸方法を提供しようとするものである。
【０００８】
上記の課題を解決するために本発明者らは，鋭意検討した結果，発泡樹脂成形体に所望の性質を付与し得る含浸添加物を発泡樹脂成形体に対して直接添加する方法を用いて，発泡樹脂成形体の表面だけでなく内部にまで添加物を付着させることに着目して，本発明を完成させた。
【０００９】
【課題の解決手段】
第１の参考発明は，含浸添加物と界面活性剤と溶媒とからなる添加剤を発泡樹脂成形体に接触させて，上記含浸添加物を上記発泡樹脂成形体に含浸分散させることを特徴とする発泡樹脂成形体への含浸添加物の含浸方法である。
【００１０】
本含浸方法においては，所望の性質を発泡樹脂成形体に付与し得る含浸添加物を，界面活性剤及び溶媒とともに発泡樹脂成形体に接触させている。溶媒は，含浸添加物を溶液化して，発泡樹脂成形体の内部への染み込みをよくする。
また，界面活性剤は，含浸添加物と発泡樹脂成形体との親和性を高め，含浸添加物の浸透性を高める。そのため，含浸添加物が，発泡樹脂成形体の表面だけでなく，間隙を伝って内部に浸透して内部の間隙にまで浸透する。それゆえ，含浸添加物が発泡樹脂成形体の表面だけでなく内部に確実に付着し，長期間その性質を発揮できる。
【００１１】
また，本含浸方法では，発泡樹脂成形体を，含浸添加物と界面活性剤と溶媒とからなる添加剤に接触させるという簡易な方法で，含浸添加物を発泡樹脂成形体に含浸させている。このため，容易に含浸添加物の性質を発泡樹脂成形体に付与することができる。
また，含浸添加物は，発泡成形した発泡樹脂成形体に対して含浸されるため，発泡樹脂成形体の発泡・成形の妨げにもならなず，発泡樹脂成形体の強度を保持することができる。
【００１２】
次に，発泡樹脂成形体としては，独立気泡の発泡樹脂粒子からなる発泡樹脂成形体，及び連続気泡を有する発泡樹脂成形体を用いることができる。発泡樹脂成形体が独立気泡の発泡樹脂粒子からなる場合には，本発明の含浸方法により，発泡樹脂粒子の形成する粒子間に存在する微細な発泡樹脂粒子間間隙に含浸添加物が十分に含浸分散する。または，連続気泡を有する発泡樹脂成形体の場合には，本発明の含浸方法により，連続的な微細な空隙に含浸添加物が充分に含浸分散する。
【００１３】
発泡樹脂成形体に用いられる発泡樹脂としては，ポリスチレン系発泡樹脂，ポリエチレン系発泡樹脂，ポリプロピレン系発泡樹脂，ポリメチルメタアクリレート系発泡樹脂，ウレタン系発泡樹脂，イソシアヌレート系発泡樹脂，メラミン系発泡樹脂，フェノール系発泡樹脂及びそれらの共重合体発泡樹脂等を用いることができる。この中，特にポリスチレン系発泡樹脂成形体が好ましい。
また，発泡樹脂成形体を建築材料として用いる場合には，機械的強度及び断熱性の高いもの，例えば，ポリスチレン系発泡樹脂成形体を用いることが好ましい。
【００１４】
上記発泡樹脂成形体の吸水性能を表わす吸水量は，０．０３ｇ／１００ｃｍ２以上であることが好ましい。０．０３ｇ／１００ｃｍ２未満の場合には，含浸添加物が発泡樹脂成形体の内部にまで付着しにくく，また発泡樹脂成形体に付与しようとする性質が充分に発揮されないおそれがある。なお，吸水量は，ＪＩＳ Ａ９５１１の測定方法で測定される。
また，発泡樹脂成形体の上記吸水量は，吸水による断熱性能の低下を防止するため，その上限は３．０ｇ／ｃｍ２以下であることが好ましい。
【００１５】
発泡樹脂成形体の発泡倍率はどんな倍率でもよい。
発泡樹脂成形体がスチレン系発泡樹脂成形体である場合にも，その発泡倍率は何倍でもよく，好ましくは５倍から１２０倍である。
【００１６】
次に，含浸添加物とは，発泡樹脂成形体に含浸させて，防虫・防蟻，耐熱，難燃，着色等の所望の性質を発泡樹脂成形体に付与するための添加物をいう。含浸添加物しては，所望の性質を発泡樹脂成形体に付与するものであればどのようなものでも用いることができる。
【００１７】
請求項１の発明のように，含浸添加物は，防虫・防蟻を目的とする防虫・防蟻剤である。
防虫・防蟻剤としては，ペルメトリン，ビフェントリン，トラロメスリン等のピレスロイド系薬剤，クロルピリホス，ホキシム，ピリダフェンチオン，テトラクロルビンホス，フェニトロチオン，プロペタンホス等の有機リン系薬剤，フェノブカルブ，カルバミン酸エステル等のカーバメート系薬剤，フィプロニル，アセタミプリド及びイミダクロプリド等のクロロピリジルメチル基を有する薬剤，クロム・銅・砒素化合物系薬剤，クロルナフタリン系薬剤，ヒ酸ナトリウム，ヒ酸鉛，酸性ヒ酸バリウム等の砒素化合物，フッ化鉛，フッ化バリウム，ケイフッ化ナトリウム等のフッ化化合物，銅化合物，ジニトロオルトクレゾール，トリブチルスズオキサイド，ホウ酸塩等のホウ素化合物，酸化チタン等のチタン化合物，ヒノキチオール，クレオソート油，トリアジン系薬剤，ナフテン酸銅等のナフテン酸金属塩，有機スズ化合物，フェノール類無機フッ化物，Ｐ−クロロメタキシレノールと３，６ジクロロピリタジンの混合物等でもよく，また接触毒剤，食毒剤，呼吸毒剤，忌避性防蟻剤等どのような作用によるものでもよい。
【００１８】
また，防虫・防蟻剤は，１種類のみではなく，２種類以上使用する事ができる。
発泡樹脂成形体を建築物の断熱材・保温材等に用いる場合には，防虫・防蟻剤として，特に毒性の低い，ホウ酸塩，ピレスロイド系薬剤，イミダクロプリド等を用いることが好ましい。
【００１９】
含浸添加物は，ホウ酸またはその塩であることが好ましい。これにより，防虫・防蟻効果を有効に発揮できる。ホウ酸またはその塩は親水性であり，元来，比較的疎水性の発泡樹脂成形体との親和性が低いが，界面活性剤及び溶媒とともに発泡樹脂成形体に接触させることにより，発泡樹脂成形体の内部にスムーズに浸透し，発泡樹脂成形体の表面だけでなく内部にまで確実に付着する。
また，含浸添加物の発泡樹脂成形体への含浸量は，一般的には，発泡樹脂成形体に対して０．００１〜３．０重量％の範囲であることが好ましい。なお，その含浸による効力，安全性及び経済性を考慮すると０．０１〜２．０重量％が望ましい。
また，ホウ酸塩等のホウ素化合物，酸化チタン等のチタン化合物のように，含浸による効力が弱いものについては，０．０１〜３０重量％が好ましい。なお，安全性及び経済性を考慮すると，０．１〜２０重量％が望ましい。
【００２０】
含浸添加物の発泡樹脂成形体への含浸量は，防虫・防蟻剤の殺虫・殺蟻能力などの性質の度合により異なる。含浸添加物が殺虫・殺蟻能力の強いピレスロイド系薬剤，イミダクロプリド等である場合には０．０１〜１．０重量％が好ましく，殺虫・殺蟻効力の比較的低いホウ酸またはその塩である場合には０．１〜２．０重量％が好ましい。なお，必要に応じて０．１〜２０重量％を用いることもできる。
【００２１】
また，添加剤中の防虫・防蟻剤濃度としては，０．１〜８０重量％の範囲が好ましく，その効力，経済性及び安全性を考慮すると１．０〜５０重量％が望ましい。
なお，殺虫，殺蟻能力が非常に強いものは，０．０１〜８０重量％が好ましく，更に好ましくは０．０５〜５０重量％である。
また，防虫・防蟻剤は，原体そのもの，エマルジョンタイプ，マイクロカプセル等を使用できる。
【００２２】
次に，上記界面活性剤としては，アニオン系界面活性剤，カチオン系界面活性剤，両性系界面活性剤，ノニオン系界面活性剤等ほとんどの界面活性剤が使用でき，特に好ましくは広く一般的に使用され毒性の低いアニオン系界面活性剤である。界面活性剤は１種類のみではなく，２種類以上使用できる。
【００２３】
上記界面活性剤は，抗菌作用を有するカチオン界面活性剤であることが好ましい。これにより，防虫・防蟻効果を効果的に発揮することができる発泡樹脂成形体を得ることができる。
かかる抗菌作用を有するカチオン界面活性剤としては，特に殺菌性の強い第４級アンモニウム塩のアルキルトリメチルアンモニウムブロマイドを用いることができる。
【００２４】
添加剤中の界面活性剤濃度は，０．０１〜５．０重量％であることが好ましい。０．０１重量％未満の場合には，含浸添加物が発泡樹脂成形体の内部にまで付着しにくく，その性能が低下するおそれがある。また，５．０重量％を超える場合には，発泡樹脂成形体の吸水による断熱性能が低下するおそれがある。
付与される性質及びその経済性を考慮すると，添加剤中の界面活性剤濃度は０．０５〜１．０重量％が望ましい。
【００２５】
上記溶媒は，含浸添加物を溶液化させるものである。かかる溶媒としては，水，有機溶剤等の溶媒のうち，含浸添加物を溶解させるものを用いることができる。特に発泡樹脂成形体がポリスチレン系発泡樹脂である場合には，これを侵さない水，低溶解性の有機溶剤，アルコール，ポリエチレングリコール等が好ましい。溶媒は，１種類または２種類以上を用いることができる。
添加剤中の溶媒濃度は，１５．０〜９９．９重量％であることが好ましく，効力，経済性を考慮すると４９．０〜９９．７重量％であることが望ましい。
【００２６】
また，上記添加剤には，更に接着剤を添加することが好ましい。これにより，含浸添加物をより強固に発泡樹脂成形体の表面及び内部に付着させることができる。
【００２７】
接着剤としては，熱可塑樹脂系接着剤，熱可塑性アクリル樹脂，熱可塑性ポリエステル樹脂，ウレタン樹脂，ウレタン変性アクリル樹脂，アクリル変性シリコン樹脂等の溶剤型タイプ接着剤，アクリルエマルジョン，アクリル／スチレン共重合体エマルジョン，アクリル／酢酸ビニル共重合エマルジョン，エチレン／酢酸ビニル共重合エマルジョン，エポキシエマルジョン，ウレタンエマルジョン等のエマルジョン系樹脂，ポリエステル樹脂，ポリアミド樹脂ポリウレタン樹脂等の水溶性タイプ接着剤などを用いることができる。
接着剤の添加剤中の濃度は，０．０１〜０．５重量％であることが好ましく，その効力，経済性を考慮すると０．０５〜０．３重量％が望ましい。
【００２８】
次に本発明における発泡樹脂成形体に添加剤を接触させる方法としては，発泡樹脂成形体の表面に刷毛等で塗布する方法，吹き付け器機等を使用し塗布する方法，ロールコーター等で塗布する方法，さらに発泡樹脂成形体を添加剤に浸漬させる方法，添加剤を加圧注入する方法を用いることができる。この中，特に発泡樹脂成形体の表面に刷毛等で塗布する方法が簡単であり経済的である。また，処理能力を考慮すると発泡樹脂成形体を添加剤に浸漬しながら，１０００から２００００Ｐａの圧力を加圧する方法も採用できる。
【００２９】
また発泡樹脂成形体は，単体でもよく，２成形体以上積層されていてもよく，経済性及び処理能力を考慮すると２成形体以上積層した状態で，発泡樹脂成形体を添加剤に浸漬する方法が好ましい。
含浸添加物を含浸させた発泡樹脂成形体は，例えば，建築材料，土木材料などに用いることができる。
【００３０】
次に，第２の参考発明は，含浸添加物と有機溶剤系の分散剤と溶媒とからなる添加剤を発泡樹脂成形体に接触させて，上記含浸添加物を上記発泡樹脂成形体に含浸分散させることを特徴とする発泡樹脂成形体への含浸添加物の含浸方法である。
【００３１】
本含浸方法では，上記界面活性剤の代わりに，有機溶剤系の分散剤を用いている点を特徴とする。
本含浸方法において，有機溶剤系の分散剤は，含浸添加物と発泡樹脂成形体との親和性を高め，含浸添加物の浸透性を高めて，発泡樹脂成形体の内部に含浸添加物を分散させる。そのため，含浸添加物が，発泡樹脂成形体の表面だけでなく，間隙を伝って内部に浸透して内部の間隙にまで浸透する。
さらに，溶媒は，含浸添加物を溶液化して，発泡樹脂成形体の内部への染み込みをよくする。
したがって，所望の性質を発泡樹脂成形体に付与し得る含浸添加物を，上記有機溶剤系の分散剤及び上記溶媒とともに発泡樹脂成形体に接触させることにより，含浸添加物が発泡樹脂成形体の表面だけでなく内部に確実に付着し，長期間その性質を発揮できる。
【００３２】
また，本含浸方法では，発泡樹脂成形体を，含浸添加物と有機溶剤系の分散剤と溶媒とからなる添加剤に接触させるという簡易な方法で，含浸添加物を発泡樹脂成形体に含浸させている。このため，容易に含浸添加物の性質を発泡樹脂成形体に付与することができる。
また，含浸添加物は，発泡成形した発泡樹脂成形体に対して含浸されるため，発泡樹脂成形体の発泡・成形の妨げにもならなず，発泡樹脂成形体の強度を保持することができる。
【００３３】
上記有機溶剤系の分散剤は，含浸添加物と発泡樹脂成形体との親和性を高めるものである。かかる分散剤としては，ほとんどの有機溶剤系を用いることができる。発泡樹脂成形体がポリスチレン系発泡樹脂の場合は，分散剤は，該発泡樹脂成形体を侵さない低溶解性の有機溶剤，例えば，低溶解性の灯油，パラフィン油，イソパラフィン油，アルコール，ポリエチレングリコール等が好ましい。分散剤は，１種類または２種類以上を用いることができる。
添加剤中の分散剤の濃度は，０．１〜９９．９重量％であることが好ましい。
【００３４】
上記溶媒は，含浸添加物を溶液化させるものである。かかる溶媒としては，水，有機溶剤等の溶媒のうち，含浸添加物を溶解させ得るを用いることができる。特に発泡樹脂成形体がポリスチレン系発泡樹脂である場合には，これを侵さない水，低溶解性の有機溶剤，アルコール，ポリエチレングリコール等が好ましい。溶媒は，１種類または２種類以上を用いることができる。
添加剤中の溶媒濃度は，１５．０〜９９．９重量％であることが好ましく，効力，経済性を考慮すると４９．０〜９９．７重量％であることが望ましい。
その他の点は，上記界面活性剤を用いた含浸添加物の含浸方法と同様である。
【００３５】
有機溶剤系の分散剤の中には，発泡樹脂成形体の内部に含浸添加物を含浸させるだけでなく，含浸添加物を溶液化する溶媒としても働くものもある。この場合には，溶媒非存在下で，含浸添加物と有機溶剤系の分散剤とからなる添加剤を発泡樹脂成形体に接触させればよい。
【００３６】
即ち，第３の参考発明は，含浸添加物と有機溶剤系の分散剤とからなる添加剤を発泡樹脂成形体に接触させて，上記含浸添加物を上記発泡樹脂成形体に含浸分散させることを特徴とする発泡樹脂成形体への含浸添加物の含浸方法である。
【００３７】
本含浸方法では，上記界面活性剤及び溶媒の代わりに，有機溶剤系の分散剤を用いている点を特徴とする。
本含浸方法において，有機溶剤系の分散剤は，発泡樹脂成形体の内部に含浸添加物を含浸させるだけでなく，含浸添加物を溶液化する溶媒としても働く。このため，溶媒非存在下で，含浸添加物と有機溶剤系の分散剤とからなる添加剤を発泡樹脂成形体に接触させることにより，含浸添加物が，発泡樹脂成形体の表面だけでなく間隙を伝って内部まで浸透して内部間隙にまで付着する。したがって，含浸添加物が発泡樹脂成形体に確実に付着し，長期間その性質を発揮できる。
【００３８】
また，本含浸方法では，発泡樹脂成形体を，含浸添加物と有機溶剤系の分散剤とからなる添加剤に接触させるという簡易な方法で，含浸添加物を発泡樹脂成形体に含浸させている。このため，容易に含浸添加物の性質を発泡樹脂成形体に付与することができる。
また，含浸添加物は，発泡成形した発泡樹脂成形体に対して含浸されるため，発泡樹脂成形体の発泡・成形の妨げにもならなず，発泡樹脂成形体の強度を保持することができる。
【００３９】
上記有機溶剤系の分散剤は，発泡樹脂成形体の内部に含浸添加物を含浸させるだけでなく，含浸添加物を溶液化する溶媒としても働く。かかる分散剤としては，有機溶剤系であって，含浸添加物を溶解させ得るものを用いることができる。発泡樹脂成形体がポリスチレン系発泡樹脂の場合は，これを侵さない低溶解性の有機溶剤，例えば，低溶解性の灯油，パラフィン油，イソパラフィン油，アルコール，ポリエチレングリコール等が好ましい。分散剤は，１種類または２種類以上を用いることができる。
添加剤中の分散剤の濃度は，２０〜９９．９重量％であることが好ましい。
その他の点は，上記界面活性剤を用いた含浸添加物の含浸方法と同様である。
【００４０】
次に，請求項１の発明は，含浸添加物と界面活性剤と溶媒とからなる添加剤を発泡樹脂成形体に接触させて，上記含浸添加物を上記発泡樹脂成形体の表面及び内部に含浸分散させてなり、
上記含浸添加物は，防虫・防蟻を目的とする防虫・防蟻剤であることを特徴とする発泡樹脂成形体である。
【００４１】
本発明の発泡樹脂成形体は，所望の性質を発泡樹脂成形体に付与し得る含浸添加物を，発泡樹脂成形体の表面だけでなく内部の間隙にまで分散含浸させている。そのため，含浸添加物の付着力が強く，長期間その性質を発揮することができる。
【００４２】
請求項３の発明のように，上記添加剤には，更に接着剤が添加されていることが好ましい。これにより，より強固に含浸添加物が発泡樹脂成形体に付着するため，一層長期間その性質を発揮しつづけることができる。
【００４３】
請求項４の発明のように，上記発泡樹脂成形体の吸水性能を表わす吸水量は，０．０３ｇ／１００ｃｍ２以上であることが好ましい。０．０３ｇ／１００ｃｍ２未満の場合には，含浸添加物が発泡樹脂成形体の内部にまで付着しにくく，発泡樹脂成形体に付与しようとする性質が充分に発揮されないおそれがある。また，発泡樹脂成形体の上記吸水量は，吸水による断熱性能の低下を防止するため，その上限は３．０ｇ／ｃｍ２以下であることが好ましい。
【００４４】
上記含浸添加物は，防虫・防蟻を目的とする防虫・防蟻剤である。
また，請求項５の発明のように，上記含浸添加物は，ホウ酸またはその塩であることが好ましい。
また，請求項２の発明のように，上記界面活性剤は，抗菌作用を有するカチオン界面活性剤であることが好ましい。
これらの場合には，発泡樹脂成形体が優れた防虫・防蟻効果を発揮することができる。
また，請求項６の発明のように，上記発泡樹脂成形体は，単体又は２以上の成形体を積層してなる積層体であることが好ましい。
【００４５】
また，界面活性剤の代わりに，有機溶剤系の分散剤を用いることもできる。即ち，第４の参考発明のように，含浸添加物と有機溶剤系の分散剤と溶媒とからなる添加剤を発泡樹脂成形体に接触させて，上記含浸添加物を上記発泡樹脂成形体の表面及び内部に含浸分散させてなることを特徴とする発泡樹脂成形体がある。この発泡樹脂成形体も，上記界面活性剤を用いた発泡樹脂成形体と同様に，含浸添加物の付着力が強く，その性質を長期間発揮することができる。
【００４６】
その他は，上記の含浸方法，界面活性剤を用いて含浸添加物を含浸させた発泡樹脂成形体と同様である。
【００４７】
また，界面活性剤及び溶媒の代わりに有機溶剤系の分散剤を用いることもできる。即ち，第５の参考発明のように，含浸添加物と有機溶剤系の分散剤とからなる添加剤を発泡樹脂成形体に接触させて，上記含浸添加物を上記発泡樹脂成形体の表面及び内部に含浸分散させてなることを特徴とする発泡樹脂成形体がある。この発泡樹脂成形体も，上記界面活性剤を用いた発泡樹脂成形体と同様に，含浸添加物の付着力が強く，その性質を長期間発揮することができる。
【００４８】
【発明の実施の形態】
本発明の実施形態について，実施例１〜３を比較例１と比較しつつ説明する。
（実施例１）
発泡樹脂成形体として，ポリスチレン発泡樹脂（三菱化学フォームプラスティック株式会社製 スチロポール ＪＦ２００）の５０倍発泡樹脂成形体を準備した。
この発泡樹脂成形体における吸水性能を表わす吸水量について，ＪＩＳ Ａ ９５１１の吸水量の測定方法により測定したところ，０．２ｇ／１００ｃｍ２であった。この発泡樹脂成形体を未処理ポリスチレン発泡樹脂成形体とした。
【００４９】
また，含浸添加物，界面活性剤及び溶媒からなる添加剤を調製した。すなわち，含浸添加物の８ホウ酸２ナトリウム４水塩を５重量％，界面活性剤のドデシルベンゼンスルホン酸ナトリウムを０．５重量％，溶媒の水を９４．４重量％添加し，含浸分散を判定するために赤色着色剤を０．１重量％添加し，加温しながら６０分攪拌して，防虫・防蟻性を目的とした添加剤を得た。
【００５０】
上記未処理ポリスチレン発泡樹脂成形体から縦５ｃｍ×横５ｃｍ×厚み２．５ｃｍの大きさのサンプルを切り出し，その表面に上記の防虫・防蟻を目的とした添加剤を１ｇ滴下し，常温で３０分放置後，その添加剤の含浸分散状況を確認した。
その結果，図１（Ａ）に示すごとく，未処理ポリスチレン発泡樹脂成形体としての発泡樹脂成形体２に滴下された添加剤１は，図１（Ｂ）に示すごとく，発泡樹脂成形体２の内部の発泡粒子２１の間隙２０を伝って浸透し，内部にまで付着した。また，含浸分散状況の結果を表１に表示した。
【００５１】
次に，上記の未処理ポリスチレン発泡樹脂成形体から縦２．５ｃｍ×横２．０ｃｍ×長さ１０ｃｍの大きさのサンプルを切り出し，その重量（Ａ０）を秤量器で測定した。この未処理ポリスチレン発泡樹脂成形体を上記の防虫・防蟻を目的とした添加剤の中に１分間浸漬し，取出し，５０℃で１日乾燥後その重量（Ａ１）を測定した。
そして，添加剤浸漬前と後のポリスチレン発泡樹脂成形体の重量差（Ａ２＝Ａ１−Ａ０）から，添加剤の含浸量（Ａ２）を求めた。さらにそのポリスチレン発泡樹脂成形体をカッターナイフで横方向に半分にカットしその含浸分散状態を確認した。その結果を表２に表示した。
【００５２】
次に，上記の未処理ポリスチレン発泡樹脂成形体から縦１０ｃｍ×横１０ｃｍ×長さ１０ｃｍの大きさのサンプルを切り出し，その重量を秤量器で測定した。その重量を１００重量部として，これに対して１重量部，３重量部，５重量部，１０重量部の上記の防虫・防蟻を目的とした添加剤を未処理ポリスチレン発泡樹脂成形体の表面全体に刷毛にて塗布した。これらの各サンプルから縦２ｃｍ×横１ｃｍ×厚み１ｃｍの防蟻効果調査用のサンプルを取り出した。
【００５３】
このサンプルの重量（Ｂ０）を秤量器で測定した。このサンプルを直径８ｃｍ×高さ６ｃｍのプラスチック容器に入れ，その中にイエシロアリの職蟻１５０頭，兵蟻１５頭を投入し，飽和食塩水を入れた。このプラスチック容器を縦３０ｃｍ×横２２ｃｍ×高さ１０ｃｍの蓋付き容器の中に設置し蓋をして，２５℃全暗条件下で３週間放置した。放置後のサンプル重量（Ｂ１）を秤量器で測定した。その減少量（Ｂ２＝Ｂ０−Ｂ１）及び減少率（１００×（Ｂ０−Ｂ１）／Ｂ０）を求めた。また食害状況を観察した。その結果を表３，表４に示した。
【００５４】
（実施例２）
実施例１の未処理ポリスチレン発泡樹脂成形体を，その吸水性能を表わす吸水量が１．０ｇ／１００ｃｍ２である５０倍発泡の未処理ポリスチレン発泡樹脂成形体とした以外は，実施例１と同様に，含浸添加物を発泡樹脂成形体に含浸させた。
実施例１と同様の測定を行い，その結果を表１〜表４に示した。
【００５５】
（比較例１）
実施例１に示した添加剤中の界面活性剤の量を０重量％とし，また含浸添加物の量を５．１重量％，溶媒の量を９４．８重量％とした以外は，実施例１と同様に，未処理ポリスチレン発泡樹脂成形体に含浸添加物を含浸させた。
実施例１と同様の測定を行い，その結果を表１〜表４に示した。
【００５６】
（実施例３）
実施例１の未処理ポリスチレン発泡樹脂成形体を，その吸水量が０．０３ｇ／１００ｃｍ２である５０倍発泡の未処理ポリスチレン発泡樹脂成形体とした以外は，実施例１と同様にして，未処理ポリスチレン発泡樹脂成形体に含浸添加物を含浸させた。
実施例１と同様の測定を行い，その結果を表１〜表４に示した。
【００５７】
（実施例４）
実施例１に示した未処理ポリスチレン発泡樹脂成形体を，その吸水性能を表わす吸水量が０．０４ｇ／１００ｃｍ２である５０倍の未処理ポリスチレン発泡樹脂成形体とし，さらに添加剤中の界面活性剤の量を０．０５重量％とし，また含浸添加物の量を５重量％，溶媒の量を９４．８５重量％とした。
そして，実施例１と同様の含浸分散テストを実施し，さらに防蟻効果調査用のサンプルとして，未処理ポリスチレン発泡樹脂成形体１００重量に対して，添加剤を１，３，５，１０，１００，３００重量部添加し，実施例１と同様に実施した。
その結果を表１〜表４に示した。
【００５８】
【表１】
【表２】
【表３】
【表４】
表１〜表４より知られるように，界面活性剤とともに含浸添加物を発泡樹脂成形体に含浸させた場合（実施例１〜４）には，界面活性剤未添加の場合（比較例１）に比べて，低濃度添加時でのイエシロアリの減少量が大きかった。
また，発泡樹脂成形体の吸水性能を表わす吸水量が０．２ｇ／１００ｃｍ２以上の場合（実施例１，２）には，０．０３ｇ又は０．０４ｇ／１００ｃｍ２の場合（実施例３，４）よりも，含浸添加物の内部浸透度が大きく，またイエシロアリの駆除効果も大きかった。
【００６３】
【発明の効果】
以上のように本発明によれば，発泡樹脂成形体に，専用設備を用いることなく経済的で簡単に防虫・防蟻，耐熱，難燃，着色等の所望の性質を付与でき，またその性質を長期間保持することができる，含浸添加物が含浸された発泡樹脂成形体及び含浸方法を提供することができる。
【図面の簡単な説明】
【図１】実施形態例１における，添加物の含浸状況を示すための発泡樹脂成形体の断面説明図（Ａ），（Ｂ）。
【符号の説明】
１．．．添加剤，
２．．．発泡樹脂成形体，
２０．．．間隙，[0001]
【Technical field】
The present invention relates to a foamed resin molded article impregnated with an impregnating additive for imparting properties such as insect proofing, ant repellency, heat resistance, flame retardancy, and coloring, and in particular, a heat insulating material, a heat insulating material, etc. for a building. The present invention relates to a method for imparting insect-proof and ant-proof properties to a foamed resin molded article used as the above.
[0002]
[Prior art]
Conventionally, in order to impart properties such as insect and ant repellency, heat resistance, flame retardancy, and coloring to foamed resin molded articles, it has been practiced to attach additives capable of exhibiting these properties to the foamed resin molded articles. Yes. For example, as disclosed in JP-A-10-36549 and JP-A-3-202528, a technique for applying an anti-anticide to a foamed resin molding is disclosed.
As a method of imparting such desired properties to the foamed resin molded article, (1) a method of adding an impregnation additive imparting a desired effect during polymerization, (2) a method of adding during foam molding, and (3) foaming A method of adding directly to a resin molded body is generally known.
[0003]
As the method of (2), a method of spraying an antifungal agent and an adhesive onto foamed resin particles as disclosed in JP-A-10-36549, and a method of foaming resin particles before foaming as disclosed in JP-A-3-202528. A method of foam molding by mixing an anti-anticide is known.
As the method of (3), as disclosed in JP-A-3-202528, a method of immersing a foamed resin molded article in an antifungal treatment solution, a method of applying an antifungal agent to the surface of the foamed resin molded article, and the like are known. It has been.
[0004]
[Problems to be solved]
However, the method (1) added at the time of polymerization requires an enormous amount of dedicated equipment, so that the production cost is great and it is not economical. Further, in this method, in order to exert good properties, it is necessary to add a large amount of impregnation additive, and therefore there is a problem that the mechanical strength of the obtained foamed resin molded product is remarkably lowered. In particular, in order to give insecticidal and ant-proofing properties to foamed resin moldings, it is necessary to increase the mixing ratio of insecticides and antproofing agents as additives, so that the mechanical strength of the obtained foamed resin moldings is low. There is a problem that it drops significantly.
[0005]
In addition, the method (2) added at the time of foam molding is not economical because a dedicated foam molding equipment is required, resulting in a large manufacturing cost. Further, the additive becomes an inhibitor of heat fusion of the foamed resin molded body during molding. Therefore, there is a problem that the mechanical strength of the obtained foamed resin molded product is remarkably lowered.
[0006]
On the other hand, in the method (3) of adding directly to the foamed resin molded article, these methods are economical because they do not require special equipment as compared with the methods (1) and (2).
However, the additive only adheres to the surface of the foamed resin molded article and does not sufficiently impregnate and disperse the gap between the foamed particles inside. Also, its adhesion is weak. Therefore, there is a problem that the additive is easily detached from the surface and the property cannot be maintained for a long time.
[0007]
In view of such conventional problems, the present invention can impart desired properties such as insect-proofing, ant-proofing, heat resistance, flame retardant, and coloring to a foamed resin molded article without using dedicated equipment. An object of the present invention is to provide a foamed resin molded article impregnated with an impregnation additive and a method of impregnation, which can retain the properties for a long period of time.
[0008]
In order to solve the above-mentioned problems, the present inventors have intensively studied, and as a result, using a method of directly adding an impregnation additive capable of imparting desired properties to the foamed resin molded body to the foamed resin molded body, The present invention was completed by paying attention to the addition of the additive not only to the surface of the foamed resin molding but also to the inside.
[0009]
[Means for solving problems]
First referenceThe invention relates to a foamed resin molded article, wherein an additive comprising an impregnation additive, a surfactant and a solvent is brought into contact with the foamed resin molded article, and the impregnated additive is impregnated and dispersed in the foamed resin molded article. It is the impregnation method of the impregnation additive.
[0010]
In this impregnation method, an impregnation additive capable of imparting desired properties to the foamed resin molded body is brought into contact with the foamed resin molded body together with a surfactant and a solvent. The solvent makes the impregnation additive into a solution and improves the penetration into the foamed resin molded body.
In addition, the surfactant increases the affinity between the impregnation additive and the foamed resin molded article, and increases the permeability of the impregnation additive. Therefore, the impregnation additive penetrates not only the surface of the foamed resin molded body but also the inside through the gap and penetrates to the inside gap. Therefore, the impregnating additive reliably adheres not only to the surface of the foamed resin molding but also to the inside, and can exhibit its properties for a long time.
[0011]
In this impregnation method, the foamed resin molded body is impregnated with the impregnated additive by a simple method in which the foamed resin molded body is brought into contact with an additive composed of an impregnation additive, a surfactant and a solvent. For this reason, the property of an impregnation additive can be easily provided to a foamed resin molding.
In addition, since the impregnating additive is impregnated into the foamed resin molded article, it does not hinder foaming / molding of the foamed resin molded article and can maintain the strength of the foamed resin molded article. .
[0012]
Next, as the foamed resin molded article, a foamed resin molded article made of closed cell foamed resin particles and a foamed resin molded article having open cells can be used. When the foamed resin molded body is composed of closed-cell foamed resin particles, the impregnation additive of the present invention sufficiently impregnates the fine gaps between the foamed resin particles existing between the particles formed by the foamed resin particles. scatter. Alternatively, in the case of a foamed resin molding having open cells, the impregnation additive is sufficiently impregnated and dispersed in continuous fine voids by the impregnation method of the present invention.
[0013]
The foamed resin used in the foamed resin molded body includes polystyrene foamed resin, polyethylene foamed resin, polypropylene foamed resin, polymethyl methacrylate foamed resin, urethane foamed resin, isocyanurate foamed resin, melamine foamed resin. Phenolic foamed resins and their copolymer foamed resins can be used. Among these, a polystyrene-based foamed resin molded body is particularly preferable.
Moreover, when using a foaming resin molding as a building material, it is preferable to use a thing with high mechanical strength and heat insulation, for example, a polystyrene-type foaming resin molding.
[0014]
UpThe water absorption representing the water absorption performance of the foamed resin molding is 0.03 g / 100 cm.2The above is preferable. 0.03g / 100cm2If the amount is less than 1, the impregnation additive does not easily adhere to the inside of the foamed resin molded article, and the properties to be imparted to the foamed resin molded article may not be sufficiently exhibited. The water absorption is measured by the measuring method of JIS A9511.
In addition, the water absorption amount of the foamed resin molded body is set to 3.0 g / cm in order to prevent the heat insulation performance from being deteriorated due to water absorption.2The following is preferable.
[0015]
The expansion ratio of the foamed resin molding may be any magnification.
Also when the foamed resin molded body is a styrene-based foamed resin molded body, the expansion ratio may be any number, preferably 5 to 120 times.
[0016]
Next, the impregnation additive refers to an additive for impregnating a foamed resin molded body to impart desired properties such as insect-proofing / ant-proofing, heat resistance, flame resistance, and coloring to the foamed resin molded body. Any impregnation additive may be used as long as it imparts desired properties to the foamed resin molded article.
[0017]
Like the invention of
Insecticides / anticides include pyrethroids such as permethrin, bifenthrin, tralomethrin, organophosphorus drugs such as chlorpyrifos, phoxime, pyridafenthion, tetrachlorbinphos, fenitrothion, propetanephos, and carbamates such as fenocarb and carbamate. , Pyronil, acetamiprid, imidacloprid and other drugs with chloropyridylmethyl group, chromium, copper, arsenic compounds, chlornaphthalene, arsenic compounds such as sodium arsenate, lead arsenate, barium acid arsenate, lead fluoride , Fluorinated compounds such as barium fluoride and sodium silicofluoride, copper compounds, dinitroorcresol, tributyltin oxide, boron compounds such as borate, titanium compounds such as titanium oxide, hinokitiol, Osote oil, triazine chemicals, naphthenic acid metal salts such as copper naphthenate, organotin compounds, phenolic inorganic fluorides, mixtures of P-chlorometaxylenol and 3,6 dichloropyritazine, etc., contact poisons, Any action such as food poison, respiratory poison, repellent ant, etc.
[0018]
In addition, insect repellents and ant repellents can be used not only in one kind but also in two kinds or more.
When the foamed resin molded article is used as a heat insulating material or a heat insulating material for a building, it is preferable to use a borate, pyrethroid-based drug, imidacloprid, or the like that has a particularly low toxicity as an insect repellent or an anti-anticide.
[0019]
The impregnation additive is preferably boric acid or a salt thereof. As a result, the insect-proof and ant-proof effect can be effectively exhibited. Boric acid or its salts are hydrophilic and originally have a low affinity with relatively hydrophobic foamed resin moldings. However, foaming resin molding can be achieved by contacting the foamed resin molding with a surfactant and solvent. It penetrates smoothly into the body and securely adheres not only to the surface of the foamed resin molding but also to the inside.
In general, the amount of impregnation additive impregnated into the foamed resin molded body is preferably in the range of 0.001 to 3.0% by weight with respect to the foamed resin molded body. In view of the effect, safety and economic efficiency of the impregnation, 0.01 to 2.0% by weight is desirable.
Moreover, 0.01-30 weight% is preferable about the thing with a weak effect by impregnation like boron compounds, such as borate, and titanium compounds, such as a titanium oxide. In consideration of safety and economy, 0.1 to 20% by weight is desirable.
[0020]
The amount of the impregnated additive impregnated into the foamed resin molded product varies depending on the degree of properties such as insecticide and ant killing ability of the insecticide / anticide. When the impregnating additive is a pyrethroid, imidacloprid or the like having a strong insecticidal / anticidal ability, 0.01 to 1.0% by weight is preferable, and boric acid or a salt thereof having a relatively low insecticidal / anticidal effect is used. In some cases, 0.1 to 2.0% by weight is preferred. In addition, 0.1 to 20 weight% can also be used as needed.
[0021]
In addition, the insecticide / anticide concentration in the additive is preferably in the range of 0.1 to 80% by weight, and is preferably 1.0 to 50% by weight in view of its efficacy, economy and safety.
In addition, a thing with very strong insecticidal and ant killing ability is preferable 0.01 to 80 weight%, More preferably, it is 0.05 to 50 weight%.
Insect repellents and insecticides can be used as active ingredients, emulsion types, microcapsules, and the like.
[0022]
Next, as the surfactant, most surfactants such as anionic surfactants, cationic surfactants, amphoteric surfactants and nonionic surfactants can be used, and particularly preferably widely used. It is an anionic surfactant with low toxicity. Two or more types of surfactants can be used, not just one.
[0023]
The surfactant is preferably a cationic surfactant having an antibacterial action. Thereby, the foamed resin molding which can exhibit an insect-proofing / ant-proof effect effectively can be obtained.
As such a cationic surfactant having an antibacterial action, alkyltrimethylammonium bromide which is a quaternary ammonium salt having particularly strong bactericidal properties can be used.
[0024]
The surfactant concentration in the additive is preferably 0.01 to 5.0% by weight. If it is less than 0.01% by weight, the impregnating additive does not easily adhere to the inside of the foamed resin molded article, and the performance may be reduced. Moreover, when it exceeds 5.0 weight%, there exists a possibility that the heat insulation performance by the water absorption of a foamed resin molding may fall.
Considering the properties to be imparted and its economic efficiency, the surfactant concentration in the additive is preferably 0.05 to 1.0% by weight.
[0025]
The solvent is used to make the impregnation additive into a solution. As such a solvent, among solvents such as water and organic solvents, those which dissolve the impregnation additive can be used. In particular, when the foamed resin molding is a polystyrene-based foamed resin, water that does not attack the resin, a low-solubility organic solvent, alcohol, polyethylene glycol, and the like are preferable. One type or two or more types of solvents can be used.
The solvent concentration in the additive is preferably 15.0 to 99.9% by weight, and is preferably 49.0 to 99.7% by weight in consideration of efficacy and economy.
[0026]
Also,UpIt is preferable to add an adhesive to the additive. Thereby, the impregnation additive can be more firmly attached to the surface and inside of the foamed resin molded body.
[0027]
Adhesives include thermoplastic adhesives, thermoplastic acrylic resins, thermoplastic polyester resins, urethane resins, urethane-modified acrylic resins, solvent-modified adhesives such as acrylic-modified silicone resins, acrylic emulsions, acrylic / styrene copolymer Emulsion resins such as coalescence emulsion, acrylic / vinyl acetate copolymer emulsion, ethylene / vinyl acetate copolymer emulsion, epoxy emulsion, urethane emulsion, water-soluble type adhesive such as polyester resin, polyamide resin polyurethane resin, etc. can be used. .
The concentration of the adhesive in the additive is preferably 0.01 to 0.5% by weight, and 0.05 to 0.3% by weight is desirable in view of its effectiveness and economy.
[0028]
Next, as a method of bringing the additive into contact with the foamed resin molded article in the present invention, a method of applying to the surface of the foamed resin molded article with a brush, a method of applying using a spraying machine, a method of applying with a roll coater, etc. Further, a method of immersing the foamed resin molded body in the additive and a method of pressurizing and adding the additive can be used. Of these, the method of applying to the surface of the foamed resin molding with a brush or the like is particularly simple and economical. In consideration of the processing capability, a method of pressurizing a pressure of 1000 to 20000 Pa while immersing the foamed resin molded body in the additive can also be adopted.
[0029]
In addition, the foamed resin molded body may be a single body or may be laminated with two or more molded bodies. In consideration of economy and processing capacity, the foamed resin molded body is immersed in an additive in a state where two or more molded bodies are laminated. Is preferred.
The foamed resin molded article impregnated with the impregnation additive can be used, for example, as a building material or a civil engineering material.
[0030]
next,Second referenceThe invention is characterized in that an additive comprising an impregnation additive, an organic solvent-based dispersant and a solvent is brought into contact with the foamed resin molded article, and the impregnated additive is impregnated and dispersed in the foamed resin molded article. This is a method for impregnating a resin molding with an impregnation additive.
[0031]
This impregnation method is characterized in that an organic solvent-based dispersant is used in place of the surfactant.
In this impregnation method, the organic solvent-based dispersant increases the affinity between the impregnating additive and the foamed resin molded article, enhances the permeability of the impregnating additive, and disperses the impregnating additive inside the foamed resin molded article. Let Therefore, the impregnation additive penetrates not only the surface of the foamed resin molded body but also the inside through the gap and penetrates to the inside gap.
Furthermore, the solvent makes the impregnation additive into a solution and improves the penetration into the foamed resin molded body.
Therefore, the impregnation additive can impart the desired properties to the foamed resin molding by bringing the impregnating additive into contact with the foamed resin molding together with the organic solvent-based dispersant and the solvent. In addition, it adheres to the inside and can exhibit its properties for a long time.
[0032]
Further, in this impregnation method, the foamed resin molded article is impregnated with the impregnated additive by a simple method of bringing the foamed resin molded article into contact with an additive comprising an impregnation additive, an organic solvent-based dispersant and a solvent. ing. For this reason, the property of an impregnation additive can be easily provided to a foamed resin molding.
In addition, since the impregnating additive is impregnated into the foamed resin molded article, it does not hinder foaming / molding of the foamed resin molded article and can maintain the strength of the foamed resin molded article. .
[0033]
The organic solvent-based dispersant enhances the affinity between the impregnation additive and the foamed resin molding. As such a dispersant, most organic solvent systems can be used. When the foamed resin molded product is a polystyrene-based foamed resin, the dispersant is a low-solubility organic solvent that does not attack the foamed resin molded product, for example, low-solubility kerosene, paraffin oil, isoparaffin oil, alcohol, polyethylene glycol. Etc. are preferred. One type or two or more types of dispersants can be used.
The concentration of the dispersant in the additive is preferably 0.1 to 99.9% by weight.
[0034]
The solvent is used to make the impregnation additive into a solution. As such a solvent, among solvents such as water and organic solvents, those capable of dissolving the impregnation additive can be used. In particular, when the foamed resin molding is a polystyrene-based foamed resin, water that does not attack the resin, a low-solubility organic solvent, alcohol, polyethylene glycol, and the like are preferable. One type or two or more types of solvents can be used.
The solvent concentration in the additive is preferably 15.0 to 99.9% by weight, and is preferably 49.0 to 99.7% by weight in consideration of efficacy and economy.
The other points are the same as the impregnation method of the impregnation additive using the surfactant.
[0035]
Some organic solvent-based dispersants not only impregnate the foamed resin molded body with the impregnating additive, but also function as a solvent for dissolving the impregnating additive. In this case, an additive composed of an impregnation additive and an organic solvent-based dispersant may be brought into contact with the foamed resin molded body in the absence of a solvent.
[0036]
That is,Third referenceThe invention relates to a foamed resin molding characterized in that an additive composed of an impregnation additive and an organic solvent-based dispersant is brought into contact with the foamed resin molded article, and the impregnated additive is impregnated and dispersed in the foamed resin molded article. This is a method for impregnating a body with an impregnation additive.
[0037]
This impregnation method is characterized in that an organic solvent-based dispersant is used in place of the surfactant and the solvent.
In this impregnation method, the organic solvent-based dispersant not only impregnates the impregnated additive into the foamed resin molded article, but also acts as a solvent for dissolving the impregnated additive. For this reason, in the absence of a solvent, an additive composed of an impregnation additive and an organic solvent-based dispersant is brought into contact with the foamed resin molded product so that the impregnated additive is not limited to the surface of the foamed resin molded product. It penetrates to the inside through and adheres to the internal gap. Therefore, the impregnating additive adheres securely to the foamed resin molded body and can exhibit its properties for a long time.
[0038]
Further, in this impregnation method, the foamed resin molded article is impregnated with the impregnated additive by a simple method in which the foamed resin molded article is brought into contact with an additive comprising an impregnation additive and an organic solvent-based dispersant. . For this reason, the property of an impregnation additive can be easily provided to a foamed resin molding.
In addition, since the impregnating additive is impregnated into the foamed resin molded article, it does not hinder foaming / molding of the foamed resin molded article and can maintain the strength of the foamed resin molded article. .
[0039]
The organic solvent-based dispersant not only impregnates the foamed resin molded body with the impregnation additive, but also functions as a solvent for dissolving the impregnation additive. As such a dispersant, an organic solvent type which can dissolve the impregnation additive can be used. When the foamed resin molding is a polystyrene-based foamed resin, a low-solubility organic solvent that does not impair this, for example, low-solubility kerosene, paraffin oil, isoparaffin oil, alcohol, polyethylene glycol, and the like are preferable. One type or two or more types of dispersants can be used.
The concentration of the dispersant in the additive is preferably 20 to 99.9% by weight.
The other points are the same as the impregnation method of the impregnation additive using the surfactant.
[0040]
Next, the claim1According to the present invention, an additive comprising an impregnation additive, a surfactant and a solvent is brought into contact with the foamed resin molded article, and the impregnated additive is impregnated and dispersed on the surface and inside of the foamed resin molded article.The
The above impregnation additive is an insecticide / anticide for the purpose of insecticide / anticideThis is a foamed resin molded product.
[0041]
In the foamed resin molded article of the present invention, an impregnation additive capable of imparting desired properties to the foamed resin molded article is dispersed and impregnated not only in the surface of the foamed resin molded article but also in the internal gap. For this reason, the adhesion of the impregnating additive is strong and can exhibit its properties for a long time.
[0042]
Claim3As in the present invention, it is preferable that an adhesive is further added to the additive. As a result, the impregnation additive more firmly adheres to the foamed resin molded article, so that it can continue to exhibit its properties for a longer period of time.
[0043]
Claim4As in the invention, the water absorption amount representing the water absorption performance of the foamed resin molded product is 0.03 g / 100 cm.2The above is preferable. 0.03g / 100cm2If it is less than 1, the impregnating additive does not easily adhere to the inside of the foamed resin molded product, and the properties to be imparted to the foamed resin molded product may not be sufficiently exhibited. In addition, the water absorption amount of the foamed resin molded body is set to 3.0 g / cm in order to prevent the heat insulation performance from being deteriorated due to water absorption.2The following is preferable.
[0044]
UpThe impregnating additive is an insecticide / anticide for insecticide / anticide prevention purposes.The
Claims5As in the present invention, the impregnation additive is preferably boric acid or a salt thereof.
Claims2As in the invention, the surfactant is preferably a cationic surfactant having an antibacterial action.
In these cases, the foamed resin molded product can exhibit an excellent insect-proof and ant-proof effect.
Claims6As in the invention, the foamed resin molded body is preferably a single body or a laminate formed by laminating two or more molded bodies.
[0045]
Further, an organic solvent-based dispersant can be used in place of the surfactant. That is,Fourth reference inventionAs described above, an additive composed of an impregnation additive, an organic solvent-based dispersant and a solvent is brought into contact with the foamed resin molded article, and the impregnated additive is impregnated and dispersed on the surface and inside of the foamed resin molded article. There is a foamed resin molded body characterized in that. Similarly to the foamed resin molded body using the surfactant, this foamed resin molded body has a strong adhesion of the impregnating additive and can exhibit its properties for a long period of time.
[0046]
Others are the same as the impregnation method and the foamed resin molded article impregnated with the impregnation additive using the surfactant.
[0047]
Further, an organic solvent-based dispersant can be used in place of the surfactant and the solvent. That is,Fifth reference inventionlike,IncludingAn additive comprising an immersion additive and an organic solvent-based dispersant is brought into contact with the foamed resin molded article, and the impregnated additive is impregnated and dispersed on the surface and inside of the foamed resin molded article. There is a foamed resin molding. Similarly to the foamed resin molded body using the surfactant, this foamed resin molded body has a strong adhesion of the impregnating additive and can exhibit its properties for a long period of time.
[0048]
DETAILED DESCRIPTION OF THE INVENTION
The embodiment of the present invention will be described while comparing Examples 1 to 3 with Comparative Example 1.
Example 1
As the foamed resin molded body, a 50-fold foamed resin molded body of polystyrene foam resin (Styropol JF200 manufactured by Mitsubishi Chemical Foam Plastic Co., Ltd.) was prepared.
The water absorption amount representing the water absorption performance in this foamed resin molded product was measured by the water absorption amount measurement method of JIS A 9511 and found to be 0.2 g / 100 cm.2Met. This foamed resin molded product was used as an untreated polystyrene foamed resin molded product.
[0049]
Also, an additive consisting of an impregnation additive, a surfactant and a solvent was prepared. That is, 5% by weight of disodium octaborate tetrahydrate as an impregnation additive, 0.5% by weight of sodium dodecylbenzenesulfonate as a surfactant, and 94.4% by weight of solvent water are added to disperse the impregnation. In order to make a judgment, 0.1% by weight of a red colorant was added and stirred for 60 minutes while warming to obtain an additive for the purpose of preventing insects and ants.
[0050]
A sample having a size of 5 cm in length, 5 cm in width, and 2.5 cm in thickness is cut out from the untreated polystyrene foamed resin molded article, and 1 g of the above-mentioned additive for the purpose of preventing insects and ants is dropped on the surface, and 30 at room temperature. After standing for a minute, the state of impregnation and dispersion of the additive was confirmed.
As a result, as shown in FIG. 1 (A), the
[0051]
Next, a sample having a size of 2.5 cm in length, 2.0 cm in width, and 10 cm in length was cut out from the above-mentioned untreated polystyrene foamed resin molded article, and its weight (A0) was measured with a weigher. This untreated polystyrene foamed resin molded article was immersed in the above-mentioned additive for the purpose of preventing insects and insects for 1 minute, taken out, dried at 50 ° C. for 1 day, and its weight (A1) was measured.
The additive impregnation amount (A2) was determined from the weight difference (A2 = A1-A0) between the polystyrene foamed resin moldings before and after the additive immersion. Furthermore, the polystyrene foamed resin molding was cut in half in the horizontal direction with a cutter knife, and the impregnated dispersion state was confirmed. The results are shown in Table 2.
[0052]
Next, a sample having a size of 10 cm in length, 10 cm in width, and 10 cm in length was cut out from the above-mentioned untreated polystyrene foamed resin molded article, and its weight was measured with a weighing instrument. The surface of the untreated polystyrene foamed resin molded article is 1 part by weight, 3 parts by weight, 5 parts by weight, and 10 parts by weight of the additive for the purpose of preventing insects and ants. The whole was applied with a brush. From each of these samples, a sample for investigating the ant-proof effect of 2 cm long × 1 cm wide × 1 cm thick was taken out.
[0053]
The weight (B0) of this sample was measured with a weigher. This sample was placed in a plastic container having a diameter of 8 cm and a height of 6 cm, and 150 termite craft ants and 15 soldier ants were placed therein, and saturated saline was added. This plastic container was placed in a container with a lid 30 cm long × 22 cm wide × 10 cm high, covered, and allowed to stand at 25 ° C. under dark conditions for 3 weeks. The sample weight (B1) after standing was measured with a weigher. The reduction amount (B2 = B0−B1) and the reduction rate (100 × (B0−B1) / B0) were determined. In addition, the state of eating damage was observed. The results are shown in Tables 3 and 4.
[0054]
(Example 2)
The untreated polystyrene foam resin molded product of Example 1 has a water absorption of 1.0 g / 100 cm, which represents its water absorption performance.2The foamed resin molded article was impregnated with the impregnation additive in the same manner as in Example 1 except that the untreated polystyrene foamed resin molded article with a 50-fold expansion was used.
The same measurements as in Example 1 were performed, and the results are shown in Tables 1 to 4.
[0055]
(Comparative Example 1)
Example 1 except that the amount of surfactant in the additive shown in Example 1 was 0% by weight, the amount of impregnating additive was 5.1% by weight, and the amount of solvent was 94.8% by weight. In the same manner as in No. 1, an untreated polystyrene foamed resin molding was impregnated with an impregnation additive.
The same measurements as in Example 1 were performed, and the results are shown in Tables 1 to 4.
[0056]
(Example 3)
The untreated polystyrene foam resin molding of Example 1 has a water absorption of 0.03 g / 100 cm.2The untreated polystyrene foam resin molding was impregnated with an impregnation additive in the same manner as in Example 1 except that the untreated polystyrene foam resin molding having a 50-fold expansion was used.
The same measurements as in Example 1 were performed, and the results are shown in Tables 1 to 4.
[0057]
Example 4
The untreated polystyrene foam resin molded article shown in Example 1 has a water absorption amount of 0.04 g / 100 cm, which represents its water absorption performance.250 times untreated polystyrene foamed resin molded product, the amount of the surfactant in the additive is 0.05% by weight, the amount of the impregnating additive is 5% by weight, and the amount of the solvent is 94.85. % By weight.
Then, the same impregnation dispersion test as in Example 1 was performed, and further, as a sample for investigating the ant protection effect, the additive was added to 1,3,5,10,100 with respect to 100 weight of the untreated polystyrene foamed resin molded body. , 300 parts by weight were added, and the same procedure as in Example 1 was performed.
The results are shown in Tables 1 to 4.
[0058]
[Table 1]
[Table 2]
[Table 3]
[Table 4]
As is known from Tables 1 to 4, when the foamed resin molded article was impregnated with the impregnating additive together with the surfactant (Examples 1 to 4), the surfactant was not added (Comparative Example 1). Compared with, the decrease in termites was greater when low concentrations were added.
Further, the water absorption representing the water absorption performance of the foamed resin molded product is 0.2 g / 100 cm.2In the above case (Examples 1 and 2), 0.03 g or 0.04 g / 100 cm2In the case of (Examples 3 and 4), the internal permeability of the impregnating additive was larger and the termite extermination effect was also greater.
[0063]
【The invention's effect】
As described above, according to the present invention, the foamed resin molded article can be imparted with desired properties such as insect proofing, ant repellency, heat resistance, flame retardant, and coloring without using dedicated equipment. It is possible to provide a foamed resin molded article impregnated with an impregnation additive and an impregnation method.
[Brief description of the drawings]
FIGS. 1A and 1B are cross-sectional explanatory views (A) and (B) of a foamed resin molded body for illustrating an impregnation state of an additive in embodiment example 1. FIG.
[Explanation of symbols]
1. . . Additive,
2. . . Foamed resin moldings,
20. . . gap,
Claims (6)
上記含浸添加物は，防虫・防蟻を目的とする防虫・防蟻剤であることを特徴とする発泡樹脂成形体。An additive consisting of impregnation additive, a surfactant and a solvent into contact with the foamed resin molded body, Ri Na with the impregnation additive impregnated dispersed on the surface and inside of the foamed resin molded body,
The foamed resin molded article , wherein the impregnating additive is an insect repellent / ant repellent agent for insect repellent / ant repellent .
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| JP2000010765A JP4603119B2 (en) | 1999-08-17 | 2000-01-19 | Foamed resin molded body impregnated with impregnation additive and impregnation method |
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| JP11-230665 | 1999-08-17 | ||
| JP23066599 | 1999-08-17 | ||
| JP2000010765A JP4603119B2 (en) | 1999-08-17 | 2000-01-19 | Foamed resin molded body impregnated with impregnation additive and impregnation method |
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| JP2001123003A JP2001123003A (en) | 2001-05-08 |
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| EP1819760B1 (en) * | 2004-11-29 | 2011-06-15 | Basf Se | Modified open-cell foams and method for the production thereof |
| JP2006160858A (en) * | 2004-12-06 | 2006-06-22 | Kaneka Corp | Flame-retardant coated synthetic resin foam |
| JP4201829B2 (en) * | 2007-03-02 | 2008-12-24 | 金山化成株式会社 | Method for producing foamed resin composite structure |
| US8065773B2 (en) * | 2007-04-02 | 2011-11-29 | Bard Access Systems, Inc. | Microbial scrub brush |
| JP5547382B2 (en) * | 2008-06-05 | 2014-07-09 | ダウ化工株式会社 | Antibacterial-containing masterbatch, method for producing ant-proof styrene resin foam using the same, and ant-proof styrene resin foam |
| JP4973636B2 (en) * | 2008-10-08 | 2012-07-11 | 金山化成株式会社 | Method for producing foamed resin composite structure |
| JP2013531751A (en) * | 2010-06-11 | 2013-08-08 | ニサス・コーポレーション | Crawl space siege system |
| JP4983967B2 (en) * | 2010-08-05 | 2012-07-25 | 金山化成株式会社 | Foamed resin composite structure and method for producing the same |
| JP4983986B1 (en) * | 2011-03-02 | 2012-07-25 | 金山化成株式会社 | Foamed resin composite structure containing ant-proofing agent, method for producing the same, and white ant control method using foamed resin composite structure |
| JP2014079945A (en) * | 2012-10-16 | 2014-05-08 | Daisen Co Ltd | Functional foam molding and method for manufacturing the same |
| JP6155074B2 (en) * | 2013-04-01 | 2017-06-28 | カンナテクノロジー株式会社 | Expanded polystyrene-based molded product capable of suppressing the growth of harmful microorganisms and method for producing the same |
| JP2018178359A (en) * | 2017-04-03 | 2018-11-15 | 株式会社エービーシー商会 | Interior building material |
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| JPS497380A (en) * | 1972-05-10 | 1974-01-23 | ||
| JPS5724371B2 (en) * | 1973-12-29 | 1982-05-24 | ||
| JPS5887136A (en) * | 1981-11-18 | 1983-05-24 | Achilles Corp | Preparation of polyurethane foam with little discoloration |
| JPS6114341A (en) * | 1984-06-28 | 1986-01-22 | ナショナル住宅産業株式会社 | Water holding material |
| JPH01156340A (en) * | 1987-12-14 | 1989-06-19 | Marubishi Yuka Kogyo Kk | Rustproofing treatment of phenol resin foam |
| US5270108A (en) * | 1989-12-28 | 1993-12-14 | Afm Corporation | Building material with protection from insects, molds, and fungi |
| JPH09253023A (en) * | 1996-03-27 | 1997-09-30 | Daiken Iki Kk | Mat for sterilization and auxiliary mat used for the mat |
| JP3025757B2 (en) * | 1997-09-02 | 2000-03-27 | 花王株式会社 | Disinfectant cleaning composition for floors |
| JPH11324153A (en) * | 1998-05-11 | 1999-11-26 | Ibiden Co Ltd | Termite prevention panel for building |
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