JPWO2008096444A1 - 2液硬化性組成物 - Google Patents
2液硬化性組成物 Download PDFInfo
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- JPWO2008096444A1 JPWO2008096444A1 JP2008527233A JP2008527233A JPWO2008096444A1 JP WO2008096444 A1 JPWO2008096444 A1 JP WO2008096444A1 JP 2008527233 A JP2008527233 A JP 2008527233A JP 2008527233 A JP2008527233 A JP 2008527233A JP WO2008096444 A1 JPWO2008096444 A1 JP WO2008096444A1
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- 230000003187 abdominal effect Effects 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- IBVAQQYNSHJXBV-UHFFFAOYSA-N adipic acid dihydrazide Chemical compound NNC(=O)CCCCC(=O)NN IBVAQQYNSHJXBV-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical class [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 description 1
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- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
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- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/08—Homopolymers or copolymers of acrylic acid esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/11—Esters; Ether-esters of acyclic polycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L35/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
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Abstract
Description
また、本発明の2液硬化性組成物は、自動車部品、例えば、オイルフィルターにおけるフィルターエレメントとハウジングのシーラーや、ガソリンタンク用のアンダーコーティング材としても使用でき、さらに、その他の諸工業製品における部品および最終製品等や成型品にも適用することができる。
このようなシール工法には、主として1液熱硬化性組成物のシーラーが用いられており、通常、車体工程の次の塗装工程では、車体部材の水洗、前処理、電着塗装とその後の電着炉での焼付けが行われ、接合部を有する車体部材にシーラー塗布が行われ、次いで該部材はシーラー炉へ送られ、その後、下、中,上塗り塗装工程へと順次送られ、最後に艤装工程に付される。
〔1〕 熱可塑性樹脂と可塑剤を含んでなるA液と、二塩基酸エステルを含むゲル化剤を含んでなるB液とからなり、A液とB液を混合することにより該混合物は室温でゲル化する、2液硬化性組成物。
〔2〕 二塩基酸エステルは、式〔I〕:
R1−O−CO−R2−CO−O−R3 〔I〕
〔式中、R1およびR3は、互いに独立して、メチル基またはエチル基を表し、R2は、炭素数が0〜3の炭化水素基(炭素数が0の場合は隣接する2つの炭素が結合する)を表す。〕
に示される、上記〔1〕に記載の2液硬化性組成物。
〔3〕 二塩基酸エステルは、マロン酸ジエステルおよび/またはコハク酸ジエステルである、上記〔1〕に記載の2液硬化性組成物。
〔5〕 B液は、A液中の熱可塑性樹脂を溶解ないし膨潤させる成分を更に含む、上記〔1〕〜〔4〕のいずれかに記載の2液硬化性組成物。
〔6〕 熱硬化性樹脂とその潜在性硬化剤を更に含む、上記〔1〕〜〔5〕のいずれかに記載の2液硬化性組成物。
〔8〕 熱可塑性樹脂100重量部に対し、ゲル化剤50〜150重量部を含む、上記〔1〕〜〔7〕のいずれかに記載の2液硬化性組成物。
〔9〕 熱可塑性樹脂100重量部に対し、二塩基酸エステル10〜150重量部を含む、上記〔1〕〜〔8〕のいずれかに記載の2液硬化性組成物。
〔11〕 A液とB液の混合後の室温におけるゲル化時間は30秒〜60分である、上記〔1〕〜〔10〕のいずれかに記載の2液硬化性組成物。
〔12〕 A液とB液の混合時はスプレー塗布可能な粘度を有し、かつ、塗布後は室温において30秒〜60分でゲル化する、上記〔1〕〜〔11〕のいずれかに記載の2液硬化性組成物。
〔13〕 A液とB液の混合時の粘度(20℃)は50〜200Pa・sである、上記〔1〕〜〔12〕のいずれかに記載の2液硬化性組成物。
11:熱可塑性樹脂、12:可塑剤、21:ゲル化剤
R1−O−CO−R2−CO−O−R3 〔I〕
〔式中、R1およびR3は、互いに独立して、メチル基またはエチル基を表し、R2は、炭素数が0〜3の炭化水素基(炭素数が0の場合は隣接する2つの炭素が結合する)を表す。〕
に示される化合物を用いることが、ゲル化特性と皮膚刺激性の点から更に好ましい。
そのような可塑剤としては、上記したA液中に用い得る可塑剤が挙げられるほか、これらと組み合わせてまたはこれらとは別に、フタル酸エステル、ジオクチルアジペート等のアジピン酸ジエステル、ジオクチルセバケート等のセバチン酸ジエステル、トリブチルホスフェート、トリス(2−エチルヘキシル)ホスフェート等のリン酸エステル、エポキシ化大豆油等のエポキシ系可塑剤、ポリオキシエチレングリコールジベンゾエート、ポリオキシプロピレングリコールジベンゾエート、ジエチレングリコールジベンゾエート、2,2−ジメチル−1,3−プロパンジオールジベンゾエート及びペンタエリスリトールテトラベンゾエート等の安息香酸エステル類、ジエチルフマレート、ジブチルフマレート、ジヘキシルフマレート、ジオクチルフマレート、ビス(2−エチルヘキシル)フマレート、ジノニルフマレート、ジイソノニルフマレート、ジデシルフマレート、ジベンジルフマレート、ジオレイルフマレート、オクチル−2−エチルヘキシルフマレート、2−エチルヘキシルイソノニルフマレート、ブチルベンジルフマレート、モノエチルフマレート、モノオクチルフマレート、モノ−2−エチルヘキシルフマレート及びモノデシルフマレートのフマル酸エステル類、フェノール系アルキルスルホン酸エステル、クレゾール系アルキルスルホン酸エステル等スルホン酸エステル類等を使用することができる。
ゲル化剤は、熱可塑性樹脂100部(重量部、以下同様)に対して、通常50〜150部の範囲、好ましくは75〜125部の範囲の量で使用される。ゲル化剤の量が少ないと混合後のゲル化時間が遅くなり、次工程への搬送の弊害となり得る。また、ゲル化剤の量が多いと混合後のゲル化時間が速くなり、塗布の作業性に支障を来たす傾向となる。
また、可塑剤は、熱可塑性樹脂100部に対して、通常75〜200部の範囲、好ましくは80〜150部の範囲で使用される。
また、二塩基酸エステルは、熱可塑性樹脂100重量部に対して、通常10〜150重量部の範囲、好ましくは30〜150重量部の範囲で使用される。
また、この粘度状態で塗布した場合、概して30秒〜60分で、図1に示したゲル化物が形成され、上述の如く、水洗に対して十分な耐シャワー性を具備し得る。
本発明のシール工法、アンダーコート工法および接着工法はいずれも、自動車製造ライン(車体工程→塗装工程→艤装工程)において、最初の車体工程で、以下の手順に従って実施することができる。
ここで、上記ゲル化した塗膜は、優れた保形性を有することから、特に耐シャワー性に優れ、化成処理液や電着液に対し飛散、溶解または脱落することがない。その後、電着炉での焼付条件下(一般に140〜220℃×10〜60分)の加熱処理によって、ゲル化した塗膜を完全に硬化する。
実施例1〜2および比較例1
(1)2液硬化性組成物の調製
下記表1のA液およびB液の項に示す部数の各成分を配合し、ミキサーで30分間撹拌混合し、次いで30分間減圧脱泡して、それぞれA液とB液を得た。
(2)貯蔵安定性(結果を表1に併記)
調製したA液とB液をそれぞれ、40℃×1週間貯蔵し、貯蔵前後の粘度をブルックフィールド型回転粘度計(20℃、#7ローター、20rpm)で測定し、粘度変化率(%)を算出した。
A液とB液を23℃雰囲気下、スタティックミキサーで混合し、直ちに下記の各性能試験に付した。
i)室温ゲル化性
混合物を23℃雰囲気下で放置し、指触によりゲル化するまでの時間(分)を測定した。
25×100×1mmのSPCC鋼板を用い、ラップ長さ25mm、クリアランス1mmで剪断接着試験片を作製後、170℃×20分にて焼付けを行い、次いで20℃に冷却した後、剪断接着強度を測定した。
JIS2号ダンベル、厚さ2mmの試験片を作成後、170℃×20分にて焼付けを行い、次いで20℃に冷却した後、破断強度(Mpa)および伸び(%)を測定した。
混合物をSPCC鋼板に1mm厚で塗布し、23℃×30分放置後、得られた試験片を垂直に立て、塗布面に対し直角(90°)に距離1mのノズル(カトリ製作所製、K9S PT1/4×5.0)から、50℃温水を0.3Mpaの圧力で1分間吹付けたときの外観変化を評価した(〇:塗布物の変形なし、×:塗布物が飛散)。
雌性のハートレー系モルモット(Std/Hartley)を用いて試験を行った。動物の背腹側部に貼付部位を設け、各試験物質を閉塞貼付した。すなわち、混合後の試料を0.1mLずつパッチテスト用絆創膏のリント布部分(直径φ16mm、鳥居薬品(株)製)に塗布し、低刺激性絆創膏(25mm幅スキナゲート(登録商標)、ニチバン(株)製)およびサージカルテープ(50mm幅、ニチバン(株)製)を用いて、動物の背腹側部に4時間貼付した。但し、無処理部位はリント布のみの貼付とした。閉塞貼付除去後48時間目に皮膚反応の確認を行い、反応有の場合を×、反応無の場合を○とした。
注2)ジャパンエポキシレジン(株)製のビスフェノールF型エポキシ樹脂、「エピコート807」
注3)備北粉化工業(株)製のホワイトン300M
注4)白石工業(株)製の白艶華(登録商標)CCR
また、二塩基酸エステルを使用せずアクリル酸エステルを使用した場合には得られた組成物の皮膚刺激性は不十分であったが、本発明に従う組成物は優れた皮膚刺激性を有していた。
Claims (13)
- 熱可塑性樹脂と可塑剤を含んでなるA液と、二塩基酸エステルを含むゲル化剤を含んでなるB液とからなり、A液とB液を混合することにより該混合物は室温でゲル化する、2液硬化性組成物。
- 二塩基酸エステルは、式〔I〕:
R1−O−CO−R2−CO−O−R3 〔I〕
〔式中、R1およびR3は、互いに独立して、メチル基またはエチル基を表し、R2は、炭素数が0〜3の炭化水素基(炭素数が0の場合は隣接する2つの炭素が結合する)を表す。〕
に示される、請求項1に記載の2液硬化性組成物。 - 二塩基酸エステルは、マロン酸ジエステルおよび/またはコハク酸ジエステルである、請求項1に記載の2液硬化性組成物。
- 二塩基酸エステルは、マロン酸ジエチルおよび/またはコハク酸ジエチルである、請求項1に記載の2液硬化性組成物。
- B液は、A液中の熱可塑性樹脂を溶解ないし膨潤させる成分を更に含む、請求項1〜4のいずれかに記載の2液硬化性組成物。
- 熱硬化性樹脂とその潜在性硬化剤を更に含む、請求項1〜5のいずれかに記載の2液硬化性組成物。
- 熱硬化性組成物はエポキシ樹脂および/またはウレタン樹脂である、請求項6に記載の2液硬化性組成物。
- 熱可塑性樹脂100重量部に対し、ゲル化剤50〜150重量部を含む、請求項1〜7のいずれかに記載の2液硬化性組成物。
- 熱可塑性樹脂100重量部に対し、二塩基酸エステル10〜150重量部を含む、請求項1〜8のいずれかに記載の2液硬化性組成物。
- 自動車製造ラインで用いる自動車材料用の、請求項1〜9のいずれかに記載の2液硬化性組成物。
- A液とB液の混合後の室温におけるゲル化時間は30秒〜60分である、請求項1〜10のいずれかに記載の2液硬化性組成物。
- A液とB液の混合時はスプレー塗布可能な粘度を有し、かつ、塗布後は室温において30秒〜60分でゲル化する、請求項1〜11のいずれかに記載の2液硬化性組成物。
- A液とB液の混合時の粘度(20℃)は50〜200Pa・sである、請求項1〜12のいずれかに記載の2液硬化性組成物。
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