JP4616572B2 - 耐火性を有する硬化性組成物、シーリング材及びそれを用いた耐火工法 - Google Patents
耐火性を有する硬化性組成物、シーリング材及びそれを用いた耐火工法 Download PDFInfo
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- JP4616572B2 JP4616572B2 JP2004108752A JP2004108752A JP4616572B2 JP 4616572 B2 JP4616572 B2 JP 4616572B2 JP 2004108752 A JP2004108752 A JP 2004108752A JP 2004108752 A JP2004108752 A JP 2004108752A JP 4616572 B2 JP4616572 B2 JP 4616572B2
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- Prior art keywords
- curable composition
- crosslinkable silyl
- silyl group
- polymer
- meth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 claims description 64
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- 239000000654 additive Substances 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
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- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 239000013008 thixotropic agent Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Description
(A)分子中に少なくとも1個の架橋性シリル基を含有する反応性有機重合体
(B)分子中に1未満の架橋性シリル基を含有する反応性有機重合体
(C)加熱膨張性中空球体
R4CR2YCOOR5・・・(3)
R4CR2YCOR5・・・(4)
R4−C6H5−SO2Y・・・(5)
[式(2)〜(5)中、R2,R3は水素原子又はメチル基、R4,R5は水素原子又は炭素数1〜20のアルキル基、アリール基又はアラルキル基、Yは塩素、臭素又はヨウ素である。)
撹拌装置、窒素ガス導入管、温度計および還流冷却管を備えたフラスコに、ノルマルブチルアクリレート85重量部、メチルメタクリレート15重量部、γ−メタクリロキシプロピルトリメトキシシラン10重量部、及び金属触媒としてチタノセンジクロライド0.1重量部を仕込み、フラスコ内に窒素ガスを導入しながらフラスコの内容物を70℃に加熱した。
撹拌機を備えた2L耐圧オートクレープに、2−プロパノールを200g仕込んだ。次に脱気と窒素置換を3回繰り返した後減圧脱気し、240℃まで加熱した。昇温が完了した時点で、アクリル酸ブチル670g、アクリル酸2−エチルヘキシル300g、γ−メタクリロキシプロピルトリメトキシシラン30g、2−プロパノール200g、ジターシャリーブチルパーオキサイド10gからなる混合液を一定の速度でオートクレーブ中に供給し、反応を開始した。2時間かけて添加、反応を行い、添加終了10分後に30℃まで冷却し、1350gの重合液を得た。得られた重合液を減圧濃縮して溶剤を取り除いた。Mw=1800、Mn=4400であり、シリル化率0.22の架橋性シリル基含有アクリル系重合体を得た。
(実施例1)
表1に示した如く、分子中に少なくとも1個の架橋性シリル基を含有する有機重合体(A)、分子中に1個未満の架橋性シリル基を含有する有機重合体(B)、老化防止剤、炭酸カルシウム及び脱水剤をそれぞれ所定量ずつ仕込み、加熱減圧混合攪拌を110℃にて2時間行い、配合物質の脱水を行った。さらに、加熱膨張性中空球体(C)、接着付与剤、及び硬化触媒を添加し、減圧混合攪拌を10分間行い、アルミニウムで被覆されたカートリッジに密閉充填し、硬化性組成物を調製した。なお、本実施例で使用した攪拌機は品川工業(株)製万能混合攪拌機である。
*1:SA100S(鐘淵化学工業(株)製、リビングラジカル重合にて合成されたアクリル系重合体)
*2:合成例1で得られた架橋性シリル基含有アクリル系重合体
*3:MAX450(鐘淵化学工業(株)製、架橋性シリル基含有アクリル変性ポリオキシアルキレン重合体)
*4:MSポリマーS303(鐘淵化学工業(株)製、架橋性シリル基含有ポリオキシアルキレン重合体)
*5:合成例2で得られた架橋性シリル基含有アクリル系重合体
*6:UP−1000(東亞合成(株)製、アクリル系有機重合体)
*7:DIOR3000(三井武田ケミカル(株)製、ポリオキシプロピレン重合体)
*8:マツモトマイクロスフェアーF−50D(松本油脂製薬(株)製、加熱膨張性中空球体)
*9:マツモトマイクロスフェアーF−30VSD(松本油脂製薬(株)製、加熱膨張性中空球体)
*10:マツモトマイクロスフェアーF−80VSD(松本油脂製薬(株)製、加熱膨張性中空球体)
*11:マツモトマイクロスフェアーF−30D(松本油脂製薬(株)製、加熱膨張性中空球体)
*12:テラージュC60(チッソ(株)製、被覆ポリリン酸アンモニウム)
*13:ハイジライトH42M(昭和電工(株)製、水酸化アルミニウム)
*14:GRAF GUARD 220−50N(巴工業(株)製)
*15:白艶華CCR(白石工業(株)製、膠質炭酸カルシウム)
*16:チヌビンB75(チバスペシャリティケミカルズ(株)製)
*17:A−171(日本ユニカー(株)製、ビニルトリメトキシシラン)
*18:A−1120(日本ユニカー(株)製、N−β(アミノエチル)γ−アミノプロピルトリメトキシシラン)
*19:No.918(三共有機合成(株)製、ジブチルスズオキサイドとジオクチルフタレートの反応物)
表1に示した如く、配合物質及び配合割合を変更した以外は実施例1と同様の手順で硬化性組成物を調製した。
前記得られた硬化性組成物と窯業系サイディング材(ニチハ(株)製モエンM)を用いて、目地長さ50mm、目地幅10mm、目地深さ6mmのつき合わせ試験体を作製する。なお養生期間は23℃,50%RHの標準状態下で14日間とする。
◎:140℃未満
○:140℃以上160℃未満
△:160℃以上200℃未満
×:200℃以上
上記耐火性試験60分後の目地部裏面のゴム状弾性体の状態を指触および目視で評価する。評価は下記の基準で行った。
◎:ゴム状弾性体がかなり残っている。
○:ゴム状弾性体が少し残っている。
△:ゴム状弾性体は残ってなく硬い皮膜となっている。
×:60分以内に目地自体が欠落して残っていない。
上記耐火性試験と同様に試験体を作製して、硬化させた硬化性組成物の硬度をゴム硬度計(JIS A型)で測定する。
前記得られた硬化性組成物の成分(C)もしくは発泡剤を添加する前の組成物(添加前組成物)と前記得られた硬化性組成物(成分(C)もしくは発泡剤を添加後の組成物、添加後組成物)のそれぞれを用いて、上記耐火性試験と同様につき合わせ試験体を作製する。なお養生期間は23℃,50%RHの標準常態下で14日とする。前記の試験体を引張りスピード50mm/minで引張り接着性試験を行い、最大伸張率を測定する。添加前組成物と添加後組成物の最大伸張率を比較して、物性の保持率(%)を求める。評価は下記の基準で行った。
○:物性保持率 50%以上
×:物性保持率 50%未満
前記得られた硬化性組成物と顔料を混合し練り合わせて色調を付与する。評価は下記の基準で行った。
○:任意の色調にできる
×:任意の色調にできない
成分(A)を配合しなかった以外は実施例6と同様の方法で組成物を調製したが、得られた組成物は硬化しなかった。
Claims (9)
- (A)分子中に少なくとも1個の架橋性シリル基を含有し、且つ該架橋性シリル基を分子鎖末端に有する(メタ)アクリル系重合体、
(B)分子中に1個未満の架橋性シリル基を含有する反応性有機重合体、及び
(C)未膨張の加熱膨張性中空球体、
を必須成分として含有し、
前記(A)及び前記(B)の合計100重量部に対して、前記(C)を0.01重量部以上20重量部未満含有し、前記(A)100重量部に対して、前記(B)を10〜300重量部含有する耐火構造体用硬化性組成物であって、
該硬化性組成物の硬化物が火炎にさらされた際に加熱によって前記(C)未膨張の加熱膨張性中空球体が膨張することにより、該硬化物が発泡断熱層を形成するようにしたことを特徴とする耐火構造体用硬化性組成物。 - 前記(A)が、リビングラジカル重合法で製造された(メタ)アクリル系重合体であることを特徴とする請求項1記載の硬化性組成物。
- 前記(A)が、原子移動ラジカル重合法で製造された(メタ)アクリル系重合体であることを特徴とする請求項1又は2記載の硬化性組成物。
- 前記(A)が、架橋性シリル基を分子鎖末端に有する(メタ)アクリル系重合体と架橋性シリル基含有ポリオキシアルキレン系重合体との混合物であることを特徴とする請求項1〜3のいずれか1項記載の硬化性組成物。
- 前記(B)が、(メタ)アクリル系重合体であることを特徴とする請求項1〜4のいずれか1項記載の硬化性組成物。
- 前記(B)の重量平均分子量が2,000〜50,000であることを特徴とする請求項1〜5のいずれか1項記載の硬化性組成物。
- 硬化後の硬度が40以下であることを特徴とする請求項1〜6のいずれか1項記載の硬化性組成物。
- 請求項1〜7のいずれか1項記載の硬化性組成物を有効成分とする耐火性を有するシーリング材。
- 耐火性を有する壁材と請求項8記載の耐火性を有するシーリング材を用いて耐火構造体を形成する工法。
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KR101995447B1 (ko) * | 2018-12-27 | 2019-07-02 | 극동크리트 주식회사 | 알루미늄 박판층과 유리섬유 망층을 이용하여 무기질 평탄층이 고도의 일체성을 가지는 건축용 조립식 복합 외장구조체 |
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US20090118401A1 (en) * | 2005-09-27 | 2009-05-07 | Atsushi Saito | Curable Composition |
JP5660613B2 (ja) * | 2010-12-20 | 2015-01-28 | 吉野石膏株式会社 | 軽量耐火間仕切壁の目地構造及びその施工方法 |
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