JP4377115B2 - Medical adhesive composition - Google Patents

Medical adhesive composition Download PDF

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Publication number
JP4377115B2
JP4377115B2 JP2002232141A JP2002232141A JP4377115B2 JP 4377115 B2 JP4377115 B2 JP 4377115B2 JP 2002232141 A JP2002232141 A JP 2002232141A JP 2002232141 A JP2002232141 A JP 2002232141A JP 4377115 B2 JP4377115 B2 JP 4377115B2
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Japan
Prior art keywords
pressure
adhesive composition
sensitive adhesive
pseudo
parts
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JP2002232141A
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JP2004035533A5 (en
JP2004035533A (en
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実 小原
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Hisamitsu Pharmaceutical Co Inc
CosMED Pharmaceutical Co Ltd
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Hisamitsu Pharmaceutical Co Inc
CosMED Pharmaceutical Co Ltd
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【0001】
【産業上の利用分野】
本発明は、粘着性に優れ、刺激性の少ない粘着剤組成物、及び、それを用いた医療用、化粧用貼付剤に関する。
【0002】
【従来の技術】
従来、疾患の治療においては、薬物の経口投与や注射投与によるのが一般的であったが、比較的最近薬剤を体内に経皮的に投与する方法が用いられるようになった。経皮吸収製剤の特性としては、皮膚に貼付後、一般に24〜48時間程度確実に密着して、所要の薬物量が吸収されることが必要であり、発汗時、入浴時にも密着し剥離しないことが必要である。また、剥離時は痛くない程度の剥離力で引き剥がせることも必要であり、粘着力が必要以上に強いと剥離時に毛むしりや角質剥離が起きたり、皮膚の引っ張りによる機械的皮膚刺激を生じる。その結果、紅斑が発生し、ひどい場合には痂皮形成や浮腫形成を伴ない、これが剥離後も数日間続く場合もあるので、このような不都合をできるだけ少なくする必要がある。また、経皮吸収製剤を皮膚から剥離した後、皮膚面に粘着剤が残存しないことも要求される。
【0003】
特開昭61−100520号公報には、2−エチルヘキシルアクリレート45モル%、ビニルピロリドン20〜55モル%及びエステル部分の炭素数が3〜12のアクリル酸エステル35モル%以下からなり、さらに多官能性モノマーを全モノマー重量の0.005〜0.5重量%含む粘着剤が提案されている。しかしこの粘着剤を用いた経皮吸収製剤は上記の特性を有してはいるが、薬物放出性を向上させるために軟化剤、可塑剤等を添加した場合、凝集力が不足し糊残りが生じるという欠点があった。従って、優れた貼付剤を獲得するためには、特に糊残りの問題を解決することが必要である。
【0004】
経皮吸収製剤においては、粘着剤層の適当な凝集力を確保し、糊残りを無くすため、粘着剤を架橋する方法が用いられてきた。例えば、粘着剤自体を架橋剤等によって微架橋する方法や、粘着剤層を形成した後に金属イオン架橋、ウレタン架橋、エポキシ架橋、メラミン架橋又は過酸化物若しくは電子線照射によるラジカル反応で架橋する方法が知られている。しかしながら、上記のような架橋法を適用すると、凝集力は向上するが粘着剤の硬化により粘着性は低下し、貼付性が悪くなるという欠点があった。
【0005】
また、上記架橋粘着剤の改良として、多量の可塑剤を含有せしめて架橋させる方法が提案されている。例えば、特許2700835、特許3014188、等。しかし、この経皮吸収製剤の場合、粘着剤層の保型性を高めることができるが、皮膚への粘着力と、粘着剤の凝集力をバランスさせた製剤設計が困難である、あるいは架橋剤と薬剤が反応して薬剤安定性が悪化しがちである、等の欠点を有していた。
【0006】
【発明が解決しようとする課題】
本発明は、上記に鑑み、粘着力と凝集力のバランスがとれ、皮膚刺激性の少ない粘着剤組成物、及び、それを用いた医療用、化粧用粘着シートを提供することを目的とする。
【0007】
【課題を解決するための手段】
本発明の要旨は、粘着剤組成物を、(メタ)アクリル酸を0.5−15%、及び/又は、(メタ)アクリル酸ヒドロキシエチルを5−30%を必須成分として含むアクリル系共重合体100重量部、可塑剤30−200重量部、及び、擬似架橋性化合物0.3−10重量部を構成成分とする重合体からなるところに存する。
【0008】
上記アクリル系共重合体には粘着性付与のために(メタ)アクリル酸アルキルエステルが30−90重量%必要であり、例えば(メタ)アクリル酸ブチル、(メタ)アクリル酸イソブチル、アクリル酸ヘキシル、アクリル酸オクチル、(メタ)アクリル酸2−エチルヘキシル、(メタ)アクリル酸イソオクチル、(メタ)アクリル酸デシル等が挙げられ、これらは単独で用いてもよいし、併用されてもよい。
【0009】
上記アクリル系共重合体には、粘着剤の凝集力を高める、あるいは薬物、化粧品原料の粘着剤中への溶解度を高める目的で、極性モノマー(例えば、2−ビニルピロリドン、酢酸ビニル、アクリルアミド、等)、マクロモノマー、等、を1.0〜40重量%の範囲で共重合させてもよい。
【0010】
上記アクリル系共重合体を調製するには、通常、重合開始剤の存在下で所要モノマーの溶液重合を行う。ただし、重合形態はこれに限定されない。また、重合反応条件は主としてモノマーの種類により適宜選定される。溶液重合を行う場合、例えば、所要モノマーの所定量に、酢酸エチル又はその他の一般的な重合溶媒を加え、攪拌装置及び冷却還流装置を備えた反応容器中でアゾビス系、過酸化物系等の重合開始剤の存在下、窒素雰囲気で70〜90℃、8〜40時間反応させればよい。なお、上記モノマー及び溶媒は一括投入してもよいし、適宜分割投入してもよい。重合開始剤は反応の進行状況に応じて、適宜分割投入するのが望ましい。
【0011】
上記アゾビス系重合開始剤としては、例えば、2,2’−アゾビス−イソ−ブチロニトリル、1,1’−アゾビス(シクロヘキサン−1−カルボニトリル)、2,2’−アゾビス−(2,4−ジメチルバレロニトリル)等が挙げられ、上記過酸化物系重合開始剤としては、例えば、過酸化ラウロイル、過酸化ベンゾイル、ジ(tert−ブチル)パーオキサイド等が挙げられる。
【0012】
本発明の医用粘着剤組成物を製造するには上記アクリル系共重合体に、可塑剤を添加する。添加量はアクリル系共重合体100重量部に対し30−200重量部である。添加量は30重量部より少ないと本発明の目的である皮膚刺激性が少ない貼付剤となりにくく、200重量部より多いと後述する擬似架橋によっても粘着剤系の凝集力が不足しがちである。
【0013】
上記可塑剤としては、例えば、オクタン酸セチル、ラウリン酸ヘキシル、ミリスチン酸イソプロピル、パルミチン酸イソプロピル、ステアリン酸ブチル、乳酸ミリスチル等の一価アルコールの脂肪酸エステル;アジピン酸ジオクチル、セバシン酸ジエチル、セバシン酸ジオクチル、コハク酸ジオクチル等の二塩基酸エステル;ジカプリン酸プロピレングリコール、トリオクタン酸グリセリル、トリ(オクタン酸/デカン酸)グリセリル、中鎖脂肪酸トリグリセリド等の多価アルコール等の脂肪酸エステル、等が挙げられ、特にミリスチン酸イソプロピル、パルミチン酸イソプロピル、セバシン酸ジエチル、中鎖脂肪酸トリグリセリド等の脂肪酸エステル、が好適に使用される。
【0014】
上記アクリル共重合体中の(メタ)アクリル酸の含有量は0.5−15.0%が望ましく、より望ましくは1.0−7%である。(メタ)アクリル酸ヒドロキシエチル含量は5−30%が望ましく、より望ましくは10−20%である。両モノマーともに下限以下であると後述する擬似架橋が十分に起こりがたく、また上限以上では凝集力が強く粘着力が低い粘着剤になりがちである。
【0015】
本発明は、上記アクリル系共重合体に可塑剤を添加しさらに、擬似架橋性化合物を添加し粘着剤組成物を擬似架橋させることを特徴とする。上記擬似架橋性化合物の含有量は、少なくなると添加による凝集力の増強効果が発現しにくくなり、多くなると粘着力が低下するので、アクリル系共重合体100重量部に対し0.3−10重量部が好ましく、より好ましくは0.5〜5重量部である。
【0016】
本発明における擬似架橋とはアクリル系共重合体中のカルボキシル基、及び/又は水酸基と擬似架橋性化合物との水素結合、静電的相互作用、ファンデルワールスカ、等の相互作用によって共重合体同士が擬似架橋性化合物を介してゆるく結合することによる凝集力の増大を計るものである。本発明の擬似架橋は従来知られている化学結合、もしくはイオン結合による強固な架橋とはミクロ構造的に異なり、擬似架橋による粘着剤組成物はゲルを生じない性質を有する。すなわち、本発明は、架橋後の組成物であっても良溶媒中に完全に溶解し不溶分(ゲル分)を全く生じない。これは従来型の架橋との明瞭な違いである。
【0017】
本発明における擬似架橋性化合物としてはポリアミン、オキシ酸塩、レゾルシン、ピロカテキン、等が好適に用いられる。より好ましくは、ポリアミン中でもヘキサンジアミン、エチレンジアミン、ジエチレントリアミン、であり、オシキ酸塩中ではガリウム酸塩、アルミン酸塩、硼酸塩である。上記擬似架橋性化合物中、ポリアミンはアクリルアルキルエステル共重合体中のカルボキシル基と相互作用して擬似架橋を生じ、オキシ酸塩、レゾルシン、ピロカテキンは、水酸基と相互作用により擬似架橋を生じる。
【0018】
従来型架橋粘着剤と本発明の擬似架橋粘着剤との物性的違いはクリープ挙動において明瞭に区別される。化学架橋、イオン架橋した粘着剤は比較的高応力下でも弾性を失わずゴム的に挙動する。それに反し、擬似架橋した粘着剤は低応力下では弾性的に挙動するが中程度応力下では擬似架橋が破壊し塑性的挙動する。模式的に第1図に示すのは、アクリル系共重合体100重量部に可塑剤50重量部を添加しポリイソシアネート、等で化学架橋させた粘着剤組成物(A)、アクリル系共重合体100重量部に可塑剤50重量部を添加しエチレンジアミンによって擬似架橋させた粘着剤組成物(B)、アクリル系共重合体100重量部に可塑剤50重量部を添加したのみの粘着剤組成物(C)を支持体の片面に塗工したテープをベークライト板の上に面積1cmで接着し加重3.0gと80gの加重を付加した時のずれ変形挙動である。擬似架橋粘着剤の挙動は、加重3.0gと80gとによって、未架橋粘着剤、化学架橋粘着剤から明瞭に異なる。
【0019】
本発明の医用粘着剤組成物からなるテープを特徴付けるのは、上記の試験において、3g加重下での2分後のずれ変形移動距離[この距離を“ずれ変形移動距離(3g、2分)”という]が粘着剤層の厚み以下でありかつ80g加重下での5分後のずれ変形移動距離[この距離を“ずれ変形移動距離(80、5分)”という]が粘着剤層の厚みの10倍以上あることである。
【0020】
本発明品の特徴は未架橋品に対しては皮膚刺激性の低減であり、また化学架橋品対しては皮膚貼付性の向上である。化学架橋品は皮膚貼付時に皮膚の動きに追随できず粘着テープは剥がれることが多い、しかしながら本発明品は皮膚の変形に対して粘着剤の塑性変形によって追随できるので皮膚貼付性ははるかに優れるものである。
【0021】
本発明は、支持体の片面に、本発明の上記アクリル系粘着剤組成物層を積層して構成するものであるが、さらに皮膚有価物を添加して経皮吸収製剤、貼付用化粧品とすることができる。
【0022】
上記支持体は、薬物が不透過性又は難透過性のものであって柔軟なものが好ましく、例えば、ポリエチレン、ポリプロピレン、エチレン−メチルアクリレート共重合体、エチレン−酢酸ビニル共重合体、エチレン−酢酸ビニル−一酸化炭素共重合体、エチレン−ブチルアクリレート−一酸化炭素共重合体、ポリ塩化ビニリデン、ポリウレタン、ナイロン、ポリエチレンテレフタレート、ポリブチレンテレフタレート等の樹脂フィルム;アルミニウムシート等が挙げられ、これらの積層シートであってもよく、織布や不織布と積層されていてもよい。また、粘着剤層との接着性を高める目的で、コロナ処理、プラズマ放電処理等の表面処理を施したり、アンカー剤によりアンカーコート処理を施してもよい。
【0023】
上記粘着剤組成物に含有させる皮膚有価物としての薬物は、経皮的に生体膜を透過しうるものであれば特に限定されず、例えば、解熱鎮痛消炎剤、ステロイド系抗炎症剤、血管拡張剤、不整脈用剤、血圧降下剤、局所麻酔剤、ホルモン剤、抗ヒスタミン剤、全身麻酔剤、眠鎮剤、抗癲癇剤、精神神経用剤、骨格筋弛緩剤、自神経用剤、抗パーキンソン剤、利尿剤、血管収縮剤、呼吸促進剤、麻薬等が挙げられる。
【0024】
上記解熱鎮痛消炎剤としては、例えば、イブプロフェン、ナプロキセン、フルルピプロフェン、ケトプロフェン、アンフェナックナトリウム、等が挙げられ上記ステロイド系抗炎症剤としては、例えば、ヒドロコルチゾン、トリアムシノロン、デキサメタゾン、ベタメタゾン、プレドニゾロン等が挙げられる。
【0025】
上記血管拡張剤としては、例えば、塩酸ジルチアゼム、四硝酸ペンタエリスリトール、硝酸イソソルビド、等が挙げられる。上記不整脈用剤としては、例えば、塩酸プロカインアミド、ジソピラミド、塩酸メキシレチン等が挙げられる。上記血圧降下剤としては、例えば、塩酸クロニジン、塩酸ブニトロロール、カプトプリル、等が挙げられる。上記局所麻酔剤としては、例えば、アミノ安息香酸エチル、塩酸テトラカイン、塩酸プロカイン、塩酸ジブカイン、塩酸オキシブプロカイン、塩酸プロピトカイン等が挙げられる。上記ホルモン剤としては、例えば、プロピルチオウラシル、チアマゾール、酢酸メテノロン、エストラジオール、エストリオール、プロゲステロン等が挙げられる。上記抗ヒスタミン剤としては、例えば、塩酸ジフェンヒドラミン、マレイン酸クロルフェニラミン、プロメタジン、塩酸シプロヘプタジン、塩酸ジフェニルピラリン等が挙げられる。
【0026】
上記全身麻酔剤としては、例えば、チオペンタールナトリウム、ペントバルビタールナトリウム等が挙げられる。上記眠・鎮剤としては、例えば、プロムワレリル尿素、アモバルビタール、フェノバルビタール等が挙げられる。上記抗癲癇剤としては、例えば、フェニトインナトリウム等が例示される。
【0027】
上記精神神経用剤としては、例えば、塩酸クロルプロマジン、チオリダジン、メプロバメート、塩酸イミプラミン、クロルジアゼポキシド、ジアゼパム等が挙げられる。上記骨格筋弛緩剤としては、例えば、塩酸スキサメトニウム、塩酸エペリゾン等が挙げられる。上記自神経用剤としては、例えば、臭化ネオスチグミン、塩化ベタネコール等が挙げられる。上記抗パーキンソン剤としては、例えば、塩酸アマンタジン等が挙げられる。上記利尿剤としては、例えば、ヒドロフルメチアジド、イソソルビド、フロセミド等が挙げられる。
【0028】
上記血管収縮剤としては、例えば、塩酸フェニレフリン等が挙げられる。上記呼吸促進剤としては、例えば、塩酸ロベリン、ジモルホラミン、塩酸ナロキソン等が挙げられる。上記麻薬としては、例えば、塩酸モルヒネ、りん酸コデイン、塩酸コカイン、塩酸ペチジン等が挙げられる。
【0029】
皮膚有価物としての化粧品原料の具体例を下記にリストするとパルミチン酸アスコルビル、コウジ酸、ルシノール、トラネキサム酸,油用性甘草エキス、ビタミンA誘導体等の美白成分、レチノール、レチノイン酸、酢酸レチノール、パルミチン酸レチノール、等の抗しわ成分、酢酸トコフェロール、カプサイン、ノル酸バニリルアミド、等の血行促進成分、ラズベリーケトン、月見草エキス、海草エキス、等のダイエット成分、イソプロピルメチルフェノール、感光素、酸化亜鉛、等の抗菌成分、ビタミンD ビタミンD、ビタミンK,等のビタミン類、等が特に好適に含有される。
【0030】
上記薬物、化粧品原料の含有量は、種類、使用目的に応じて適宜決定されるが、少なくなると有効性が低下し、多くなると粘着性が低下することから、粘着剤層中0.01〜50重量%が好ましい。薬物が粘着剤層中で過飽和状態で存在したり、結晶が析出した状態で存在していても特に支障はない。また、薬物を吸収促進剤とともにカプセル化したり、薬物貯蔵層を設けてもよい。
【0031】
本発明の粘着剤層の厚みは、特に限定されるものではないが、薄くなると皮膚有価物を多量に添加せねばならず、粘着力が低下し、厚くなると支持体付近の粘着剤中に存在する皮膚有価物が粘着剤層表面に拡散しにくくなり、薬物放出率が低下するので、10〜200μmが好ましい。
【0032】
本発明の経皮吸収製剤の製造には、従来公知の粘着テープの製造方法が使用でき、例えば、溶剤塗工法では、粘着剤、可塑剤、擬似架橋性化合物、皮膚有価物、を所定量、酢酸エチル等の溶液に溶解又は分散させ、得られた液を支持体上に塗布・乾燥する方法、剥離紙上に塗布・乾燥した後支持体上に転写する方法等が好適に使用される。
【0033】
【実施例】
以下に実施例を掲げて、本発明をさらに詳しく説明するが、本発明はこれらに限定されるものではない。なお、以下「部」とあるのは「重量部」を意味する。
【0034】
アクリル系共重合体の合成
【0035】
実施例1
アクリル酸2−エチルヘキシル300部、アクリル酸ヒドロキシエチル50部、アクリル酸20部、及び酢酸エチル300部を攪拌装置及び還流冷却装置付きセパラブルフラスコに供給し、攪拌及び窒素置換しながら75℃に昇温した。過酸化ベンゾイル2部を酢酸エチル20部に溶解した溶液を5分割し、その1をセパラブルフラスコに添加し、重合を開始した。残部の4を反応開始後2時間目から1時間間隔で添加し、添加終了後、さらに2時間反応させた。なお、粘度調節のため反応開始後、2時間毎に酢酸エチルを50部づつ4回添加した。反応終了後、冷却し、次いで酢酸エチルを追加して固形分濃度30重量%、粘度1.2×10cpsの粘着剤溶液を得た。
【0036】
実施例2
実施例1におけるモノマー組成がアクリル酸2−エチルヘキシル300部、アクリル酸ヒドロキシエチル50部、アクリル酸20部、2ビニルピロリドン80部である以外はすべて同様にして固形分30重量%、粘度1.8x10cpsの粘着剤溶液を得た。
【0037】
実施例3
実施例1におけるモノマー組成がアクリル酸2−エチルヘキシル300部、アクリル酸14部、酢酸ビニル50部であり、開始剤が過酸化ベンゾイルの代わりにアゾビスイソブチロニトリルである以外はすべて同様にして固形分30重量%、粘度1.0x10cpsの粘着剤溶液を得た。
【0038】
比較例1
実施例1におけるモノマー組成がアクリル酸2−エチルヘキシル300部、アクリル酸ヒドロキシエチル10部、アクリル酸3部、2ビニルピロリドン80部である以外はすべて同様にして固形分30重量%、粘度1.5x10cpsの粘着剤溶液を得た。
【0039】
試験用シートの作成とずれ変形移動距離の測定
実施例1、2比較例1によって得られた粘着剤溶液に、可塑剤、架橋性化合物加えて、液全体をディゾルバーにて均一に攪拌し、混合液を得た。得られた混合液をシリコン処理した厚さ35μmのPETフィルム上に乾燥後の粘着剤層の厚みが100μmになるように塗布し、乾燥させ、次いで厚さ35μmのPETフィルム上に上記粘着剤層をラミネートして皮膚用粘着シートを得た。次いで、作成したシートを幅1cmに切断してテープ状とし、25℃においてベークライト板へ1cmx1cmの接着面積で荷重500gのローラー往復させて密着させた後板を垂直にしてずれ変形距離(3g、2分)とずれ変形距離(80g、5分)とを測定した。
【0040】
以下の表1には、上記のようにして作成、測定した皮膚用粘着シートの組成、ずれ移動距離測定結果を実施例として示す。表2には比較例として実施例に準じて作成、測定した結果を示す。なお擬似架橋性化合物はいずれも試薬特を用いた。実際の配合にあたっては、オキシ酸は5%水溶液として所定量を添加した。ずれ変形移動距離が2mmよりも大きい場合は≧2とした。その他の擬似架橋性化合物は5%のTHF溶液として所定量を添加した。
【表1】

Figure 0004377115
【表2】
Figure 0004377115
表3には、化学、イオン架橋における測定値を示す。化学架橋剤としてはコロネートHL(日本ポリウレタン製)、アルミニウムアセチルアセトネート(試薬特)を用いた。
【表3】
Figure 0004377115
【0041】
ゲル分率の測定
上記により作成した各シートを20cmに裁断し粘着剤層の重量(W1)を測定した。次にそのシートを酢酸エチル中に浸し3日間放置して溶剤可溶分を抽出した。その後不溶分を取り出し乾燥させた後の粘着層の重量(W2)を測定し、下記の式によってゲル分率を算出した。結果を表4に示す。
(W2 x 100)/(W1 x A/B)
A:(粘着剤+架橋剤)重量、 B(粘着剤+可塑剤+架橋剤)重量
Figure 0004377115
【0042】
皮膚刺激試験及び貼付性試験
(皮膚刺激)
上記により得られた試験シートについて、以下の評価を行い、結果を表5に示した。
成人男子5人の上腕部に各試験シート(20cm)を貼付し、24時間後に剥離した。剥離して1時間後の皮膚の状態を目視で観察して、下記評価基準により評価し、5人の評点の総和の平均値を指数とした。
(評価基準)
0:紅斑なし、 1:かろうじて識別できる程度のごく軽度の紅斑、 2:明らかな紅斑 3:中程度の紅斑、 4:深紅色の強い紅斑
貼付性
成人男子5人の上腕部に各経皮吸収製剤を貼付し、24時間後に剥離した。剥離直前の皮膚上のシートの貼付状態を目視で観察して、下記評価基準により評価した。
(評価基準)
○:ほぼ全員完全に貼付、□:1〜3人に部分的剥離あり、×:4〜5人に剥離あり
糊残り性
成人男子5人の上腕部に各経皮吸収製剤を貼付し、24時間後に剥離した。剥離直後の皮膚の状態を目視で観察して、下記評価基準により評価した。
(評価基準)
○:ほぼ全員完全に糊残りなし、□:1〜3人に部分的糊残りあり、×:4〜5人に糊残りあり
Figure 0004377115
【0043】
経皮吸収製剤、化粧品パッチの製造と評価
実施例4,5,6、比較例2、比較例11を構成成分とするアクリルアルキルエステル組成物及び皮膚有価物を表6に示す配合とした以外は上記度同様にして医薬品パッチ、化粧品パッチを作成し、評価した。結果を表6に示す。表中、Hはインドメタシンを、Kはケトプロフェンを、EはビタミンEを、それぞれ表わす。
刺激性
日本白色種のウサギの脱毛した背部にテープ剤の試験片(面積10cm)を貼付し、24時間後、これを剥離し、剥離直後及び剥離1時間後の皮膚の紅斑状態を目視で観察した。なお、本試験において浮腫及び痂皮の形成は認められなかった。繰り返し回数は各製剤毎に4回とした。紅斑の程度は下記の0〜4の5段階の判定基準で評価した。
0:紅斑なし、 1:かろうじて識別できるごく軽度の紅斑、 2:明らかな紅斑、 3:中程度の紅斑、 4:深紅色の強い紅斑。
各回における評点の総和を繰り返し回数4で割った平均値を各々のテープ製剤の皮膚刺激指数とした。
【0062】
貼付性
上記刺激性の試験と同じ操作で、ウサギの皮膚にテープ製剤を24時間貼付し、剥離直前の貼付性の有無を目視で観察した。繰り返し回数は各製剤毎に4回とした。評価基準は下記の通りである。
0:製剤剥離なし1:一部に剥離を認める2:明らかに剥離を認める
平均値(評価点の総和を繰り返し回数4で割った値)を各製剤の貼付性指数とした。
Figure 0004377115
【0063】
【発明の効果】
本発明の医用粘着剤組成物及びそれを用いた経皮吸収製剤、化粧品用シートは、上述の通りの構成であるので、粘着力と凝集力のバランスがとれた良好な貼付性を示すため、剥がす際に、糊残りがなく、皮膚表面の角質層の損傷、毛むしり等の機械的刺激等による皮膚刺激を低減できる。
【図面の簡単な説明】
【図1】 可塑剤添加アクリル系共重合体の化学架橋、擬似架橋、未架橋状態におけるクリープ挙動の異なり模式図
A:化学架橋、 B:擬似架橋、 C:未架橋
( )内の数字は荷重[0001]
[Industrial application fields]
The present invention relates to a pressure-sensitive adhesive composition having excellent adhesiveness and less irritation, and a medical and cosmetic patch using the same.
[0002]
[Prior art]
Conventionally, in the treatment of diseases, oral administration or injection administration of drugs has been generally used, but relatively recently a method of transdermally administering a drug into the body has been used. As a characteristic of the transdermal absorption preparation, it is necessary to adhere firmly to the skin in general for about 24 to 48 hours after being applied to the skin, and it is necessary to absorb the required amount of drug, and it adheres and does not peel even during sweating or bathing. It is necessary. In addition, it is necessary to peel with a peeling force that does not hurt when peeling, and if the adhesive strength is stronger than necessary, hair peeling or keratin peeling may occur during peeling, or mechanical skin irritation may occur due to skin pulling . As a result, erythema occurs and, in severe cases, is accompanied by scab formation or edema formation, which may continue for several days after peeling, so it is necessary to minimize such inconveniences. It is also required that no adhesive remains on the skin surface after the transdermally absorbable preparation is peeled from the skin.
[0003]
Japanese Patent Application Laid-Open No. 61-100500 includes 45 mol% of 2-ethylhexyl acrylate, 20 to 55 mol% of vinylpyrrolidone, and 35 mol% or less of an acrylate ester having 3 to 12 carbon atoms in the ester portion. A pressure-sensitive adhesive containing 0.005 to 0.5% by weight of the total monomer weight has been proposed. However, although the transdermally absorbable preparation using this adhesive has the above-mentioned characteristics, when a softener, a plasticizer, etc. are added to improve the drug release property, the cohesive force is insufficient and the adhesive residue is not present. There was a disadvantage that it occurred. Therefore, in order to obtain an excellent patch, it is particularly necessary to solve the problem of adhesive residue.
[0004]
In a transdermally absorbable preparation, a method of cross-linking an adhesive has been used in order to secure an appropriate cohesive force of the adhesive layer and eliminate adhesive residue. For example, a method of micro-crosslinking the pressure-sensitive adhesive itself with a crosslinking agent or the like, or a method of forming a pressure-sensitive adhesive layer and then cross-linking by metal ion cross-linking, urethane cross-linking, epoxy cross-linking, melamine cross-linking or peroxide or electron beam irradiation radical reaction It has been known. However, when the crosslinking method as described above is applied, the cohesive force is improved, but there is a drawback that the adhesiveness is lowered due to the curing of the adhesive, and the sticking property is deteriorated.
[0005]
Further, as a method for improving the above-mentioned cross-linking adhesive, there has been proposed a method of cross-linking by containing a large amount of a plasticizer. For example, Japanese Patent No. 2700835, Japanese Patent No. 3014188, etc. However, in the case of this transdermally absorbable preparation, the shape retention of the pressure-sensitive adhesive layer can be improved, but it is difficult to design a preparation that balances the adhesive strength to the skin and the cohesive strength of the pressure-sensitive adhesive, or a crosslinking agent. And the drug reacts and the drug stability tends to deteriorate.
[0006]
[Problems to be solved by the invention]
In view of the above, an object of the present invention is to provide a pressure-sensitive adhesive composition that has a good balance between adhesive force and cohesive force and has little skin irritation, and a medical and cosmetic pressure-sensitive adhesive sheet using the same.
[0007]
[Means for Solving the Problems]
The gist of the present invention is that the pressure-sensitive adhesive composition comprises an acrylic copolymer containing 0.5 to 15% (meth) acrylic acid and / or 5 to 30% hydroxyethyl (meth) acrylate as an essential component. combined 100 parts by weight, 30-200 parts by weight plasticizer, and a pseudo-crosslinking compound 0. It exists in the place which consists of a polymer which makes 3-10 weight part a structural component.
[0008]
The acrylic copolymer requires 30-90% by weight of (meth) acrylic acid alkyl ester for tackiness, such as (butyl) (meth) acrylate, isobutyl (meth) acrylate, hexyl acrylate, Examples include octyl acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, decyl (meth) acrylate, and the like. These may be used alone or in combination.
[0009]
The acrylic copolymer has a polar monomer (for example, 2-vinylpyrrolidone, vinyl acetate, acrylamide, etc.) for the purpose of increasing the cohesive force of the adhesive or increasing the solubility of the drug or cosmetic raw material in the adhesive. ), macro mono mers, etc., may be copolymerized in the range of 1.0 to 40 wt%.
[0010]
In order to prepare the acrylic copolymer, solution polymerization of a required monomer is usually performed in the presence of a polymerization initiator. However, the polymerization form is not limited to this. The polymerization reaction conditions are appropriately selected mainly depending on the type of monomer. When performing solution polymerization, for example, ethyl acetate or other general polymerization solvent is added to a predetermined amount of the required monomer, and an azobis-based, peroxide-based, or the like in a reaction vessel equipped with a stirrer and a cooling reflux device. What is necessary is just to make it react at 70-90 degreeC and 8 to 40 hours by nitrogen atmosphere in presence of a polymerization initiator. The monomer and solvent may be added all at once, or may be added separately as appropriate. It is desirable that the polymerization initiator is appropriately divided and added depending on the progress of the reaction.
[0011]
Examples of the azobis-based polymerization initiator include 2,2′-azobis-iso-butyronitrile, 1,1′-azobis (cyclohexane-1-carbonitrile), 2,2′-azobis- (2,4-dimethyl). Valeronitrile) and the like. Examples of the peroxide polymerization initiator include lauroyl peroxide, benzoyl peroxide, and di (tert-butyl) peroxide.
[0012]
In order to produce the medical pressure-sensitive adhesive composition of the present invention, a plasticizer is added to the acrylic copolymer. The addition amount is 30 to 200 parts by weight with respect to 100 parts by weight of the acrylic copolymer. When the amount added is less than 30 parts by weight, it is difficult to obtain a patch with a low skin irritation, which is the object of the present invention. When the amount added is more than 200 parts by weight , the cohesive force of the adhesive system tends to be insufficient even by pseudo-crosslinking described later.
[0013]
Examples of the plasticizer include fatty acid esters of monohydric alcohols such as cetyl octanoate, hexyl laurate, isopropyl myristate, isopropyl palmitate, butyl stearate, myristyl lactate; dioctyl adipate, diethyl sebacate, dioctyl sebacate And dibasic acid esters such as dioctyl succinate; fatty acid esters such as polyhydric alcohols such as propylene glycol dicaprate, glyceryl trioctanoate, glyceryl trioctanoate / decanoate, and medium chain fatty acid triglycerides, etc. Fatty acid esters such as isopropyl myristate, isopropyl palmitate, diethyl sebacate, and medium chain fatty acid triglycerides are preferably used.
[0014]
The content of (meth) acrylic acid in the acrylic copolymer is preferably 0.5 to 15.0%, more preferably 1.0 to 7%. The content of hydroxyethyl (meth) acrylate is preferably 5-30%, more preferably 10-20%. When both monomers are below the lower limit, the pseudo-crosslinking described later hardly occurs, and above the upper limit, the cohesive force tends to be high and the pressure-sensitive adhesive tends to be low.
[0015]
The present invention is characterized in that a plasticizer is added to the acrylic copolymer and a pseudo-crosslinking compound is added to pseudo-crosslink the pressure-sensitive adhesive composition. When the content of the pseudo-crosslinkable compound is decreased, the effect of enhancing the cohesive force due to the addition is less likely to be exhibited, and when the content is increased, the adhesive strength is decreased. Therefore, the content is 0.3 to 10 % by weight with respect to 100 parts by weight of the acrylic copolymer. Parts, preferably 0.5 to 5 parts by weight .
[0016]
The pseudo-crosslinking in the present invention refers to the carboxyl groups in the acrylic copolymer and / or the copolymers by the interaction such as hydrogen bonding, electrostatic interaction, van der Waalska, etc. between the hydroxyl group and the pseudo-crosslinking compound. Increases the cohesive force by loosely binding via a pseudo-crosslinkable compound. The pseudo-crosslinking of the present invention is microstructurally different from the conventionally known strong cross-linking by chemical bonding or ionic bonding, and the pressure-sensitive adhesive composition by pseudo-crosslinking has a property of not generating a gel . That is, the present invention completely dissolves in a good solvent even when the composition is crosslinked, and does not produce any insoluble matter (gel content). This is a distinct difference from conventional crosslinking.
[0017]
As the pseudo-crosslinking compound in the present invention, polyamine, oxyacid salt, resorcin, pyrocatechin and the like are preferably used. More preferred are hexanediamine, ethylenediamine, and diethylenetriamine among the polyamines, and gallate, aluminate, and borate among the oxalates. In the pseudo-crosslinking compound, polyamine interacts with the carboxyl group in the acrylic alkyl ester copolymer to produce pseudo-crosslinking, and oxyacid salt, resorcin, and pyrocatechin produce pseudo-crosslinking by interaction with the hydroxyl group.
[0018]
The physical property difference between the conventional cross-linked pressure-sensitive adhesive and the pseudo-cross-linked pressure-sensitive adhesive of the present invention is clearly distinguished in the creep behavior. Chemically crosslinked and ionically crosslinked pressure-sensitive adhesives behave like rubber without losing elasticity even under relatively high stress. Contrast, the pseudo crosslinked adhesive under low stress pseudo crosslinking is plastically behavior disrupted under elastically moderate but behave stress. FIG. 1 schematically shows a pressure-sensitive adhesive composition (A) obtained by adding 50 parts by weight of a plasticizer to 100 parts by weight of an acrylic copolymer and chemically crosslinking with polyisocyanate, etc., and an acrylic copolymer. A pressure-sensitive adhesive composition (B) in which 50 parts by weight of a plasticizer is added to 100 parts by weight and pseudo-crosslinked with ethylenediamine, and a pressure-sensitive adhesive composition in which only 50 parts by weight of a plasticizer is added to 100 parts by weight of an acrylic copolymer ( C), which is a deviation deformation behavior when bonded with an area 1 cm 2 were added weighted weighted 3.0g and 80g on the Bakelite plate a tape was applied to one side of a support. The behavior of the pseudo-crosslinked pressure-sensitive adhesive clearly differs from the uncrosslinked pressure-sensitive adhesive and the chemically crosslinked pressure-sensitive adhesive depending on the weight of 3.0 g and 80 g.
[0019]
The tape comprising the medical pressure-sensitive adhesive composition of the present invention is characterized by the above-mentioned test in which the displacement deformation movement distance after 2 minutes under a load of 3 g [this distance is referred to as “displacement deformation movement distance (3 g, 2 minutes)”. Is less than or equal to the thickness of the pressure-sensitive adhesive layer, and the displacement deformation movement distance after 5 minutes under a load of 80 g [this distance is referred to as “displacement deformation movement distance (80, 5 minutes)”] That is 10 times or more.
[0020]
The feature of the product of the present invention is a reduction in skin irritation with respect to an uncrosslinked product, and an improvement in skin adhesiveness with respect to a chemically crosslinked product. Chemically cross-linked products cannot follow the movement of the skin at the time of skin application, and the adhesive tape often peels off.However, since the product of the present invention can follow the deformation of the skin by plastic deformation of the adhesive, the skin adhesiveness is much better. It is.
[0021]
The present invention is constituted by laminating the above-mentioned acrylic pressure-sensitive adhesive composition layer of the present invention on one side of a support. Further, a valuable skin material is added to form a transdermally absorbable preparation or a cosmetic for patch application. be able to.
[0022]
The support is preferably a soft and impermeable drug, such as polyethylene, polypropylene, ethylene-methyl acrylate copolymer, ethylene-vinyl acetate copolymer, ethylene-acetic acid. Vinyl-carbon monoxide copolymer, ethylene-butyl acrylate-carbon monoxide copolymer, polyvinylidene chloride, polyurethane, nylon, polyethylene terephthalate, polybutylene terephthalate, and other resin films; aluminum sheets and the like are laminated. It may be a sheet, and may be laminated with a woven fabric or a non-woven fabric. Further, for the purpose of improving the adhesiveness with the pressure-sensitive adhesive layer, surface treatment such as corona treatment or plasma discharge treatment may be performed, or anchor coating treatment may be performed with an anchor agent.
[0023]
The drug as a valuable skin material contained in the pressure-sensitive adhesive composition is not particularly limited as long as it can percutaneously penetrate a biological membrane. For example, antipyretic analgesic / anti-inflammatory agent, steroidal anti-inflammatory agent, vasodilator agents for arrhythmia agents, antihypertensive agents, local anesthetics, hormones, antihistamines, general anesthetics, pro Nemuri鎮static agents, antiepileptic agents, psychoneurotic agents, skeletal muscle relaxants, autonomic nervous system agents, anti Examples include Parkinson's agent, diuretic, vasoconstrictor, respiratory accelerator, narcotic and the like.
[0024]
Examples of the antipyretic analgesic / anti-inflammatory agent include ibuprofen, naproxen, flurpiprofen, ketoprofen, ampenac sodium and the like. Examples of the steroidal anti-inflammatory agent include hydrocortisone, triamcinolone, dexamethasone, betamethasone, prednisolone. Etc.
[0025]
Examples of the vasodilator include diltiazem hydrochloride, pentaerythritol tetranitrate, and isosorbide nitrate. Examples of the arrhythmic agent include procainamide hydrochloride, disopyramide, mexiletine hydrochloride and the like. Examples of the antihypertensive agent include clonidine hydrochloride, bunitrolol hydrochloride, captopril, and the like. Examples of the local anesthetic include ethyl aminobenzoate, tetracaine hydrochloride, procaine hydrochloride, dibucaine hydrochloride, oxybuprocaine hydrochloride, propitocaine hydrochloride and the like. Examples of the hormone agent include propylthiouracil, thiamazole, methenolone acetate, estradiol, estriol, progesterone and the like. Examples of the antihistamine include diphenhydramine hydrochloride, chlorpheniramine maleate, promethazine, cyproheptadine hydrochloride, diphenylpyraline hydrochloride and the like.
[0026]
Examples of the general anesthetic include thiopental sodium and pentobarbital sodium. As the pro-sleep-sedation agents, for example, Puromuwareriru urea, amobarbital, phenobarbital, and the like. Examples of the anti-epileptic agent include phenytoin sodium.
[0027]
Examples of the neuropsychiatric agent include chlorpromazine hydrochloride, thioridazine, meprobamate, imipramine hydrochloride, chlordiazepoxide, diazepam and the like. Examples of the skeletal muscle relaxant include sisamethonium hydrochloride, eperisone hydrochloride, and the like. As the autonomic nervous system agents, e.g., neostigmine bromide, bethanechol chloride and the like. Examples of the anti-Parkinson agent include amantadine hydrochloride and the like. Examples of the diuretic include hydroflumethiazide, isosorbide, furosemide and the like.
[0028]
Examples of the vasoconstrictor include phenylephrine hydrochloride. Examples of the respiratory accelerator include lobeline hydrochloride, dimorphoamine, naloxone hydrochloride and the like. Examples of the narcotic include morphine hydrochloride, codeine phosphate, cocaine hydrochloride, and pethidine hydrochloride.
[0029]
Specific examples of cosmetic raw materials as valuable skin products are listed below. Ascorbyl palmitate, kojic acid, lucinol, tranexamic acid, oily licorice extract, whitening ingredients such as vitamin A derivatives, retinol, retinoic acid, retinol acetate, palmiticin retinyl, anti-wrinkle component equal, tocopherol acetate, Kapusain, loading Le acid vanillylamide, blood circulation promotion component equal, raspberry ketone, evening primrose extract, seaweed extract, diet components etc., isopropyl methyl phenol, photosensitive element, zinc oxide, etc. Antibacterial components, vitamin D 2 , vitamin D 3 , vitamins such as vitamin K, and the like are particularly preferably contained.
[0030]
The content of the drug and cosmetic raw material is appropriately determined according to the type and purpose of use. However, the effectiveness decreases when the content decreases, and the adhesiveness decreases when the content increases. % By weight is preferred. There is no particular problem even if the drug is present in the pressure-sensitive adhesive layer in a supersaturated state or in a state where crystals are precipitated. In addition, the drug may be encapsulated with an absorption promoter, or a drug storage layer may be provided.
[0031]
The thickness of the pressure-sensitive adhesive layer of the present invention is not particularly limited. However, when the thickness is reduced, a large amount of valuable valuable skin must be added, the adhesive strength is reduced, and when the thickness is increased, the pressure-sensitive adhesive layer is present in the pressure-sensitive adhesive near the support. 10 to 200 μm is preferable because the valuable skin material is less likely to diffuse to the surface of the pressure-sensitive adhesive layer and the drug release rate is reduced.
[0032]
For the production of the percutaneous absorption preparation of the present invention, a conventionally known method for producing an adhesive tape can be used. For example, in a solvent coating method, a predetermined amount of an adhesive, a plasticizer, a pseudo-crosslinkable compound, a valuable skin material, A method of dissolving or dispersing in a solution such as ethyl acetate and applying and drying the obtained liquid on a support, a method of applying and drying on a release paper, and then transferring to a support and the like are preferably used.
[0033]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto. Hereinafter, “parts” means “parts by weight”.
[0034]
Synthesis of acrylic copolymer
Example 1
300 parts of 2-ethylhexyl acrylate, 50 parts of hydroxyethyl acrylate, 20 parts of acrylic acid, and 300 parts of ethyl acetate are fed to a separable flask equipped with a stirrer and a reflux condenser, and the temperature is raised to 75 ° C. while stirring and purging with nitrogen. Warm. A solution obtained by dissolving 2 parts of benzoyl peroxide in 20 parts of ethyl acetate was divided into 5 parts, and 1 was added to the separable flask to initiate polymerization. The remaining 4 was added at an interval of 1 hour from the 2nd hour after the start of the reaction, and further reacted for 2 hours after the addition was completed. In order to adjust the viscosity, 50 parts of ethyl acetate was added four times every 2 hours after the start of the reaction. After completion of the reaction, the mixture was cooled, and then ethyl acetate was added to obtain a pressure-sensitive adhesive solution having a solid concentration of 30% by weight and a viscosity of 1.2 × 10 4 cps.
[0036]
Example 2
In the same manner as in Example 1, except that the monomer composition was 300 parts of 2-ethylhexyl acrylate, 50 parts of hydroxyethyl acrylate, 20 parts of acrylic acid, and 80 parts of vinylpyrrolidone, the solid content was 30% by weight, and the viscosity was 1.8 × 10. A 4 cps adhesive solution was obtained.
[0037]
Example 3
All in the same manner except that the monomer composition in Example 1 is 300 parts of 2-ethylhexyl acrylate, 14 parts of acrylic acid, 50 parts of vinyl acetate, and the initiator is azobisisobutyronitrile instead of benzoyl peroxide. An adhesive solution having a solid content of 30% by weight and a viscosity of 1.0 × 10 4 cps was obtained.
[0038]
Comparative Example 1
In the same manner as in Example 1, except that the monomer composition is 300 parts of 2-ethylhexyl acrylate, 10 parts of hydroxyethyl acrylate, 3 parts of acrylic acid and 80 parts of vinylpyrrolidone, the solid content is 30% by weight and the viscosity is 1.5 × 10. A 4 cps adhesive solution was obtained.
[0039]
Preparation of test sheet and measurement of displacement shift distance Plasticizer and crosslinkable compound were added to the adhesive solution obtained in Examples 1 , 2 , 3 and Comparative Example 1 to make the whole solution into a dissolver. And uniformly stirred to obtain a mixed solution. The obtained mixed solution was applied on a 35 μm thick PET film treated with silicon so that the thickness of the pressure-sensitive adhesive layer after drying was 100 μm, dried, and then the above pressure-sensitive adhesive layer was coated on the 35 μm thick PET film. Was laminated to obtain an adhesive sheet for skin. Next, the prepared sheet was cut to a width of 1 cm to form a tape. At 25 ° C., the back plate was brought into close contact with a bakelite plate by reciprocating a 500 g load with a bonding area of 1 cm × 1 cm. 2 minutes) and displacement distance (80 g, 5 minutes) were measured.
[0040]
Table 1 below shows the composition of the pressure-sensitive adhesive sheet for skin prepared and measured as described above, and the measurement result of the displacement movement distance as examples. Table 2 shows the results prepared and measured in accordance with the examples as comparative examples. Note pseudo crosslinking compound either with a reagent JP grade. Is hit on the actual formulation, oxy acid was added a predetermined amount of 5% aqueous solution. When the displacement deformation moving distance is larger than 2 mm, ≧ 2. Other pseudo-crosslinking compounds were added in a predetermined amount as a 5% THF solution.
[Table 1]
Figure 0004377115
[Table 2]
Figure 0004377115
Table 3 shows the measured values in chemistry and ionic crosslinking. The chemical crosslinking agent Coronate HL (manufactured by Nippon Polyurethane) was used aluminum acetylacetonate (reagent JP grade).
[Table 3]
Figure 0004377115
[0041]
Each sheet prepared by measuring <br/> above gel fraction was cut into 20 cm 2 and weighed (W1) of the adhesive layer. Next, the sheet was immersed in ethyl acetate and allowed to stand for 3 days to extract a solvent-soluble component. Thereafter, the weight (W2) of the pressure-sensitive adhesive layer after taking out the insoluble matter and drying it was measured, and the gel fraction was calculated by the following formula. The results are shown in Table 4.
(W2 x 100) / (W1 x A / B)
A: (pressure-sensitive adhesive + crosslinking agent) weight, B (pressure-sensitive adhesive + plasticizer + crosslinking agent) weight
Figure 0004377115
[0042]
Skin irritation test and adhesiveness test (skin irritation)
The test sheet obtained as described above was evaluated as follows, and the results are shown in Table 5.
Each test sheet (20 cm 2 ) was affixed to the upper arm of five adult males and peeled off after 24 hours. The state of the skin 1 hour after peeling was visually observed and evaluated according to the following evaluation criteria, and the average value of the sum of the scores of the five people was used as an index.
(Evaluation criteria)
0: No erythema, 1: Very mild erythema that is barely discernable, 2: Clear erythema, 3: Moderate erythema, 4: Strong erythema with deep crimson color
Pasting properties Each of the percutaneous absorption preparations was affixed to the upper arm of 5 adult males and peeled off after 24 hours. The state of application of the sheet on the skin immediately before peeling was visually observed and evaluated according to the following evaluation criteria.
(Evaluation criteria)
○: Almost all members are completely affixed, □: Partial peeling occurs for 1 to 3 persons, and ×: peeling occurs for 4 to 5 persons
Adhesive residue Each of the percutaneous absorption preparations was applied to the upper arm of 5 adult males and peeled off after 24 hours. The state of the skin immediately after peeling was visually observed and evaluated according to the following evaluation criteria.
(Evaluation criteria)
○: Almost all members have no adhesive residue, □: 1 to 3 people have partial adhesive residue, ×: 4 to 5 people have adhesive residue
Figure 0004377115
[0043]
Production and evaluation of transdermally absorbable preparations and cosmetic patches Examples 4, 5, and 6 and Comparative Examples 2 and 11 are acrylic alkyl ester compositions and skin valuables as shown in Table 6. A pharmaceutical patch and a cosmetic patch were prepared and evaluated in the same manner as described above except that. The results are shown in Table 6. In the table, H represents indomethacin, K represents ketoprofen, and E represents vitamin E.
Irritation A test strip of tape (area 10 cm 2 ) was affixed to the depigmented back of a Japanese white rabbit, peeled off after 24 hours, and erythema of the skin immediately after peeling and 1 hour after peeling. The state was observed visually. In this test, edema and crust formation were not observed. The number of repetitions was 4 for each formulation. The degree of erythema was evaluated according to the following 5 criteria from 0 to 4.
0: no erythema, 1: mild erythema barely distinguishable, 2: clear erythema, 3: moderate erythema, 4: strong erythema with deep crimson color.
The average value obtained by dividing the sum of the scores at each time by the number of repetitions of 4 was used as the skin irritation index of each tape preparation.
[0062]
Pasting property The tape preparation was affixed to the rabbit skin for 24 hours by the same operation as the above-mentioned irritation test, and the presence or absence of pasting property immediately before peeling was visually observed. The number of repetitions was 4 for each formulation. The evaluation criteria are as follows.
0: No peeling of the preparation 1: Partial peeling was observed 2: An average value clearly showing peeling (a value obtained by dividing the sum of evaluation points by the number of repetitions 4) was defined as the sticking index of each preparation.
Figure 0004377115
[0063]
【The invention's effect】
Since the medical pressure-sensitive adhesive composition of the present invention and the percutaneous absorption preparation and cosmetic sheet using the same are configured as described above, in order to show good adhesiveness with a balance between adhesive force and cohesive force, When peeling off, there is no adhesive residue, and skin irritation due to mechanical irritation such as damage to the stratum corneum on the skin surface and hair bruising can be reduced.
[Brief description of the drawings]
FIG. 1 A: Chemical cross-linking, B: Pseudo-crosslinking, C: Uncross-linked () is the load

Claims (4)

(メタ)アクリル酸及び/又は、(メタ)アクリル酸ヒドロキシエチルを必須成分として含むアクリル系共重合体100重量部、可塑剤30−200重量部、擬似架橋性化合物0.3−10重量部よりなる粘着剤組成物であって、前記アクリル系共重合体が、(メタ)アクリル酸を1〜15%、及び/又は、(メタ)アクリル酸ヒドロキシエチルを5〜30%、必須成分として含み、擬似架橋性化合物がポリアミン、オキシ酸塩、レゾルシン、ピロカテキン、中の1種あるいはそれ以上からなり、前記アクリル系共重合体中のカルボキシル基及び/又は水酸基と前記擬似架橋性化合物との間の水素結合、静電的相互作用又はファンデルワールス力により、前記共重合体同士が擬似架橋を形成しており、上記粘着剤組成物を粘着剤層として粘着シートの支持体の片面に設けた場合において該粘着剤組成物のずれ変形移動距離(3g、2分)が粘着剤層の厚み以下でありかつずれ変形移動距離(80g、5分)が粘着剤層の厚みの10倍以上であることを特徴とする、前記粘着剤組成物。From 100 parts by weight of an acrylic copolymer containing (meth) acrylic acid and / or hydroxyethyl (meth) acrylate as an essential component, from 30 to 200 parts by weight of a plasticizer, and from 0.3 to 10 parts by weight of a pseudo-crosslinkable compound The acrylic copolymer comprises 1 to 15% (meth) acrylic acid and / or 5 to 30% hydroxyethyl (meth) acrylate as an essential component, The pseudo-crosslinkable compound is composed of one or more of polyamine, oxyacid salt, resorcin, pyrocatechin, and between the carboxyl group and / or hydroxyl group in the acrylic copolymer and the pseudo-crosslinkable compound. The copolymers form pseudo-crosslinks by hydrogen bonding, electrostatic interaction or van der Waals force, and the pressure-sensitive adhesive composition is used as a pressure-sensitive adhesive layer. When the adhesive composition is provided on one side of the support, the displacement displacement distance (3 g, 2 minutes) of the adhesive composition is less than the thickness of the adhesive layer and the displacement displacement movement distance (80 g, 5 minutes) is adhesive. The said adhesive composition characterized by being 10 times or more of the thickness of an agent layer. ポリアミンが、ヘキサンジアミン、エチレンジアミン、ジエチレントリアミン、であり、オキシ酸塩が、ガリウム酸塩、アルミン酸塩、硼酸塩であることを特徴とする、請求項1に記載の粘着剤組成物。  The pressure-sensitive adhesive composition according to claim 1, wherein the polyamine is hexanediamine, ethylenediamine, diethylenetriamine, and the oxyacid salt is a gallate, aluminate, or borate. 請求項1または2に記載の粘着剤組成物を支持体の少なくとも片面に塗布してなる粘着シート。The adhesive sheet formed by apply | coating the adhesive composition of Claim 1 or 2 to the at least single side | surface of a support body. 請求項1または2に記載の粘着剤組成物を含む粘着剤層に、皮膚有価物をさらに含有してなる粘着シート。PSA sheet to the adhesive layer comprising a pressure-sensitive adhesive composition according to claim 1 or 2, further comprising a skin valuable.
JP2002232141A 2002-07-05 2002-07-05 Medical adhesive composition Expired - Lifetime JP4377115B2 (en)

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JP4589608B2 (en) * 2003-06-24 2010-12-01 ニプロパッチ株式会社 Pressure sensitive adhesive tape
JP4527949B2 (en) * 2003-06-24 2010-08-18 ニプロパッチ株式会社 Adhesive tape
JP4724368B2 (en) * 2004-01-07 2011-07-13 コスメディ製薬株式会社 Adhesive composition and patch
JP4567998B2 (en) * 2004-03-22 2010-10-27 コスメディ製薬株式会社 Hydrophilic external skin pressure-sensitive adhesive composition and hydrophilic patch using hydrophilic pressure-sensitive adhesive
JP4815163B2 (en) * 2005-07-26 2011-11-16 久光製薬株式会社 Adhesives and patches
JP2012219044A (en) * 2011-04-06 2012-11-12 Nitto Denko Corp Adhesive preparation
JP2012219045A (en) * 2011-04-06 2012-11-12 Nitto Denko Corp Patch and patch preparation
WO2015115497A1 (en) * 2014-01-31 2015-08-06 久光製薬株式会社 Emedastine-containing tape
JP6329309B1 (en) * 2017-06-29 2018-05-23 小林 正則 Double wrinkle forming adhesive tape

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