JP2012171966A - 発泡性液状樹脂組成物および発泡体 - Google Patents
発泡性液状樹脂組成物および発泡体 Download PDFInfo
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- JP2012171966A JP2012171966A JP2011031958A JP2011031958A JP2012171966A JP 2012171966 A JP2012171966 A JP 2012171966A JP 2011031958 A JP2011031958 A JP 2011031958A JP 2011031958 A JP2011031958 A JP 2011031958A JP 2012171966 A JP2012171966 A JP 2012171966A
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- foam
- liquid resin
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- foamable liquid
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Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
【解決手段】ヒドロシリル基当量が30g/mol以上180g/mol以下の硬化剤(A−1)とヒドロシリル基当量が200g/mol以上700g/mol以下の硬化剤(A−2)、少なくとも1個のアルケニル基を有し、主鎖を構成する繰り返し単位がオキシアルキレン系単位からなる重合体(B)、ヒドロシリル化触媒(C)、発泡剤(D)、潤滑剤(E)からなる発泡性液状樹脂組成物であり、該発泡性液状樹脂組成物中のヒドロシリル基含有量がアルケニル基1モル当り1.1モル以上5.0モル以下である発泡性液状樹脂組成物を発泡することにより、上記特性を有する発泡体を得ることができる。
【選択図】なし
Description
中でも組成物中の相溶性の面から芳香族基含有化合物で変性することが好ましい。
本発明における重合体(B)は、少なくとも1個のアルケニル基を有し、主鎖を構成する繰り返し単位がオキシアルキレン系単位からなる重合体である。アルケニル基とは、ヒドロシリル化反応に対して活性のある炭素−炭素二重結合を含む基である。アルケニル基としては、炭素数が好ましくは2〜20個、より好ましくは2〜4個の脂肪族不飽和炭化水素基(例:ビニル基、アリル基、メチルビニル基、プロペニル基、ブテニル基、ペンテニル基、ヘキセニル基等)、炭素数が好ましくは3〜20個、より好ましくは3〜6個の環式不飽和炭化水素基(例:シクロプロペニル基、シクロブテニル基、シクロペンテニル基、シクロヘキセニル基等)、メタクリル基等が挙げられる。
アルケニル基のポリオキシアルキレン重合体への結合様式は特に限定はなく、アルケニル基の直接結合、エーテル結合、エステル結合、カーボネート結合、ウレタン結合、ウレア結合、あるいはヒドロシリル化反応に関与しないアルキル基等のスペーサー成分を介しての結合等が例示される。
本発明におけるヒドロシリル化触媒(C)としては、ヒドロシリル化触媒として使用し得るものである限り、特に制限はなく、任意のものを使用し得る。ヒドロシリル化触媒(C)の具体例としては、白金の担体;アルミナ、シリカ、カーボンブラック等の担体に固体白金を担持させたもの;塩化白金酸;塩化白金酸とアルコール、アルデヒド、ケトン等の錯体;白金−オレフィン錯体や白金−ビニルシロキサン錯体;白金−ホスフィン錯体;白金−ホスファイト錯体;ジカルボニルジクロロ白金、等が挙げられる。
有機酸としては、多価カルボン酸例えば、クエン酸、シュウ酸、フマル酸、フタル酸、リンゴ酸、酒石酸が挙げられる。
重炭酸塩としては、炭酸水素ナトリウム、炭酸水素アンモニウム等が挙げられる。
炭酸塩としては、炭酸ナトリウム、炭酸アンモニウム等が挙げられる。
亜硝酸塩としては、例えば亜硝酸アンモニウムが挙げられる。
本発明の発泡性液状樹脂組成物は潤滑剤(E)を含有する。潤滑剤(E)を含有することで、発泡性液状樹脂組成物を発泡してなる発泡体の発泡セル内における摩擦や粘着を少なくし、所望の触感や柔軟性を有する発泡体を得ることができる。また、この潤滑剤(E)は、硬化剤(A−1)及び硬化剤(A−2)と重合体(B)のヒドロシリル化反応によって形成される三次元網目構造体に保持されて、発泡体系外へのブリードアウトが抑えられる傾向にあるため、長期間にわたって触感や柔軟性が維持することが可能となる。
発泡体の製造方法は、硬化剤(A)、重合体(B)、ヒドロシリル化触媒(C)、発泡剤(D)、潤滑剤(E)を含んでなる発泡性液状樹脂組成物を硬化、発泡すれば特に限定なく製造できる。
圧縮残留ひずみが小さいことにより、例えば、クッションとして用いた場合に、使用時のひずみが少なく、優れた復元性を発現することが可能である。
家具用途としては、椅子、座イス、座布団、ソファー、ソファークッション・シートクッション等の各種クッション、カーペット・マット類、コタツ敷・掛け布団、便座マット等のクッション材や表皮材・表皮裏打ち材等が挙げられる。
各種洗浄用スポンジ用途としては、清掃用クリーナー、食器洗浄用クリーナー、身体洗浄用クリーナー、靴磨クリーナー、洗車用クリーナー等が挙げられる。
履物用途としては、靴の表皮材、裏打ち、中敷、靴擦れ防止パッド、各種靴パッド、インナブーツ、スリッパ、スリッパ芯、サンダル、サンダル中敷等が挙げられる。
化粧用具用途としては、化粧用パフ、アイカラーチップ等が挙げられる。
材等が挙げられる。
人工臓器、その他生体適合材料、薬液染み出しパッド、止血パッド、気液分離フィルター(留置針フィルター)、貼布剤、医療用液体吸収用具、マスク、圧迫パッド、手術用ディスポ製品、低周波治療器用電極パッド、床ずれ予防マットレス、体位変換クッション、車椅子用クッション、車椅子の座面、シャワー椅子等の介護用品、入浴介護用枕、拘縮用手のひらプロテクター、テーピング、ギブス用ライナー、義肢・義足用ライナー、入れ.歯台、その他.歯科用品、衝撃吸収パッド、ヒッププロテクター、肘・膝用プロテクター、創傷被覆材等にも利用できるものである。
得られた発泡体から30mm角程度の立方体を切り出し、3辺のサイズを測定して体積を算出し、測定した重さから除することにより、密度を算出した。なお、発泡体作製後に発泡体が収縮し、密度測定不可のものは「収縮」と記載した。
得られた発泡体を手で圧縮した際の触感を、以下の基準で評価し、△以上で合格とした。
○:指で底づき感を感じるまで押して、横にずらした際に、小さい力で横ずり変形ができる。(ゲル素材と同等)
○△:指で底づき感を感じるまで押して、横にずらした際に、中程度の力で横ずり変形ができる。
△:指で底づき感を感じるまで押して、横にずらした際に、横ずり変形には大きな力が必要である。
△×:指で底づき感を感じるまで押して、横にずらした際に、大きな力を加えると横ずり変形ができるが、変形量が少ない。
×:指で底づき感を感じるまで押して、横にずらした際に、大きな力を加えても横ずり変形ができない。
得られた発泡体を手で触り、ブリード物の手への付着の有無を以下の基準で評価し、△以上で合格とした。
○: ブリード物の付着が全く無い。
○△:ブリード物の付着が僅かにある。
△: ブリード物の付着が少しある。
△×:ブリード物の付着がある。
×: ブリード物の付着が多量にある。
得られた発泡体を30mm角程度の立方体に切り出し、豆腐用硬度計((株)大場計器製作所製)を用いて発泡体作製後の硬さを評価し、柔軟性の目安とした。また、発泡体を100℃に設定したオーブンで1週間加熱養生を行った後、豆腐用硬度計を用いて加熱養生後の硬さを評価し、
硬さ変化率(%)=(加熱養生後の硬さ−発泡体作製後の硬さ)/発泡体作製後の硬さ×100
の式から硬さ変化率を算出した。
JIS K 6400−4 C法に従い、40℃、8時間、75%圧縮で実施した。
実施例・比較例においては、表1に示す原料を用いた。
(―Si−O−)繰り返しユニットを平均して10個もつ両末端トリメチルシロキシ基封鎖メチルハイドロジェンポリシロキサンに白金触媒存在下全ヒドロシリル基量の0.5当量のα―メチルスチレンを添加し、1分子中に平均5個のヒドロシリル基を有する化合物(硬化剤(A−1)を得た。この化合物の数平均分子量Mnは1190、ヒドロシリル基当量は238g/molであった(化合物を30%エタノール性水酸化カリウムに添加して発生した水素量をWS型湿式ガスメーターにて測定し、化合物中のヒドロシリル基当量を見積もった。)。
苛性アルカリを用いた重合法により、数平均分子量3000のオキシプロピレン重合体グリコールを得た。得られたオキシプロピレン重合体グリコールを開始剤として複合金属シアン化物錯体触媒(亜鉛ヘキサシアノコバルテート)を用いてプロピレンオキシドを重合し、数平均分子量28000の重合物を得た。
1Lディスポカップ中で重合体(B−1)100部に対して、耐光性安定剤−1と耐光性安定剤−2、および紫外線吸収剤をそれぞれ1.0部、発泡剤(D)をそれぞれ5.0部(重量比率:重曹/クエン酸=1)添加し、十分混合した後に、3本ペイントロール[(株)小平製作所製]で練りこみ、マスターバッチを作成した。このマスターバッチに貯蔵安定性改良剤を0.02部、触媒(C)を0.02部添加して十分に混合した。その後、表2〜4に記載の硬化剤(A)と潤滑剤(E)を混合して発泡性液状樹脂組成物を得た。
Claims (10)
- ヒドロシリル基当量が30g/mol以上180g/mol以下の硬化剤(A−1)とヒドロシリル基当量が200g/mol以上700g/mol以下の硬化剤(A−2)、少なくとも1個のアルケニル基を有し、主鎖を構成する繰り返し単位がオキシアルキレン系単位からなる重合体(B)、ヒドロシリル化触媒(C)、発泡剤(D)、潤滑剤(E)からなる発泡性液状樹脂組成物であり、該発泡性液状樹脂組成物中のヒドロシリル基含有量がアルケニル基1モル当り1.1モル以上5.0モル以下である発泡性液状樹脂組成物。
- 重合体(B)が、数平均分子量10000以上100000以下である請求項1に記載の発泡性液状樹脂組成物。
- 重合体(B)の主鎖を構成する繰り返し単位がオキシプロピレンである請求項1または2に記載の発泡性液状樹脂組成物。
- 発泡剤(D)が、加熱により分解して無機ガスを発生する化学発泡剤である請求項1〜3の何れか一項に記載の発泡性液状樹脂組成物。
- 潤滑剤(E)が、動粘度(25℃)が30mm2/s以上10000mm2/s以下のシリコーン系潤滑剤である請求項1〜4の何れか一項に記載の発泡性液状樹脂組成物。
- ヒドロシリル基当量が30g/mol以上180g/mol以下の硬化剤(A−1)とヒドロシリル基当量が200g/mol以上700g/mol以下の硬化剤(A−2)、分子鎖中に少なくとも1個のアルケニル基を有し、主鎖を構成する繰り返し単位がオキシアルキレン系単位からなる重合体(B)、ヒドロシリル化触媒(C)、発泡剤(D)、潤滑剤(E)からなる請求項1〜5の何れか一項に記載の発泡性液状樹脂組成物を発泡してなる発泡体。
- 密度が20kg/m3以上350kg/m3以下である請求項6記載の発泡体。
- 40℃、8時間条件下で75%圧縮したときの圧縮残留ひずみが10%以下である請求項6または7に記載の発泡体。
- ヒドロシリル基当量が30g/mol以上180g/mol以下の硬化剤(A−1)とヒドロシリル基当量が200g/mol以上700g/mol以下の硬化剤(A−2)、分子鎖中に少なくとも1個のアルケニル基を有し、主鎖を構成する繰り返し単位がオキシアルキレン系単位からなる重合体(B)、ヒドロシリル化触媒(C)、発泡剤(D)、潤滑剤(E)からなる発泡性液状樹脂組成物を発泡させることを特徴とする請求項6〜8何れか一項に記載の発泡体の製造方法。
- 発泡性液状樹脂組成物を40℃以上150℃以下の温度で硬化、発泡させることを特徴とする請求項9に記載の発泡体の製造方法。
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| JP2003057900A (ja) * | 2001-08-10 | 2003-02-28 | Kanegafuchi Chem Ind Co Ltd | ローラ用組成物およびそれを用いて製造される導電性ローラ |
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| JP2010270242A (ja) * | 2009-05-22 | 2010-12-02 | Kaneka Corp | 変成シリコーン樹脂軟質発泡体及び該発泡体からなる寝具 |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52144053A (en) * | 1976-05-27 | 1977-12-01 | Dow Corning | Silicone gel and silicone gel filled flexible products |
| WO2002046308A1 (en) * | 2000-12-07 | 2002-06-13 | Kaneka Corporation | Semiconductive resion composition and semiconductive member |
| JP2003057900A (ja) * | 2001-08-10 | 2003-02-28 | Kanegafuchi Chem Ind Co Ltd | ローラ用組成物およびそれを用いて製造される導電性ローラ |
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