JP2004231782A - Two-part polyurethane resin composition - Google Patents

Two-part polyurethane resin composition Download PDF

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Publication number
JP2004231782A
JP2004231782A JP2003021666A JP2003021666A JP2004231782A JP 2004231782 A JP2004231782 A JP 2004231782A JP 2003021666 A JP2003021666 A JP 2003021666A JP 2003021666 A JP2003021666 A JP 2003021666A JP 2004231782 A JP2004231782 A JP 2004231782A
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Prior art keywords
organic substance
calcium carbonate
resin composition
polyurethane resin
surface area
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JP2003021666A
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Japanese (ja)
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JP3998582B2 (en
Inventor
Shoji Ebara
昭次 江原
Katsunori Fukumoto
勝憲 福本
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Maruo Calcium Co Ltd
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Maruo Calcium Co Ltd
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  • Polyurethanes Or Polyureas (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two-part polyurethane resin composition which is excellent in foam suppression and in slump resistance in the hardening process even under high-temperature and high-humidity circumstances and which presents a good external appearance. <P>SOLUTION: The two-part polyurethane resin composition contains a calcium carbonate whose surface has a BET specific surface area of not less than 8 m<SP>2</SP>/g. The surface of the calcium carbonate is treated with an organic mixture comprising at least one organic matter (A) selected from the group consisting of alkylated aromatic sulfonic acids and their metallic salts and at least one organic matter (B)selected from the group consisting of aliphatic acids and their metallic salts. In the surface-treatment mixture, the organic matters (A) and (B) are not metallic salts at the same time, the weight ratio (A)/(B) is 0.05-1, and the BET specific surface area and the treated surface area satisfy the inequality: 1<A/BET<6, wherein BET is the BET specific surface area in m<SP>2</SP>/g as determined by the nitrogen adsorption method and A is the amount of the surface treating matter in mg/g×CaCO<SB>3</SB>. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、主剤および硬化剤を有する二液性ポリウレタン樹脂組成物、更に詳しくは、主剤と硬化剤の混合作業性ないし施工作業性が良好で、高温多湿下でも硬化の際における発泡抑制効果および耐スランプ性に優れ、特に、適当な可使時間を有し、美観に優れたシーリング材、接着剤として有用な二液性ポリウレタン樹脂組成物に関する。
【0002】
【従来の技術】
ポリウレタン樹脂組成物よりなるシーリング材は、シリコーン系、変性シリコーン系、ポリサルファイド系、アクリルウレタン系、SBR系、ブチルゴム系等の樹脂組成物よりなるシーリング材に比べて、性能の制御性やコストパーフォーマンスに優れ、施工が簡単であり、硬化した後は、気密性、防水性に優れた柔軟な弾性体となり、かつ耐久性も高いため、目地材、塗膜防水材、接着剤等として、土木、建築、舶舶、車輌、その他各分野において広く使用されている。
【0003】
ポリウレタン樹脂組成物には湿気硬化型の一液性ポリウレタン樹脂組成物とポリオール硬化型の二液性ポリウレタン樹脂組成物とがあり、硬化特性の制御性や接着性の面で二液性ポリウレタン樹脂組成物が優れている。しかし、硬化の際に、施工基体との接触部に気泡が発生し接着不良となったり、気泡により表面にふくれを生じたり、亀裂が発生して密閉性が低下したり外観不良を起こしやすいという問題を含んでいる。
【0004】
この問題の解決策として、酸化カルシウムおよびアルキルベンゼンスルフォン酸を含む表面処理剤で表面処理した炭酸カルシウムを含有させること(特許文献1)、高級脂肪酸アルカリ金属塩で表面処理した球状炭酸カルシウムを配合しすること(特許文献2)、脂肪酸塩及びアルキルベンゼンスルフォン酸塩を用いて混合処理した表面処理炭酸カルシウムを含有させること(特許文献3) 、あるいは脂肪酸のカルシウム塩と脂肪酸鉛塩を含有させること(特許文献4)、主剤としてN−ヒドロキシアルキル−オキサゾリジンとの反応させて得られる末端遊離イソシアネート基含有ウレタンポリマーを主成分とし、硬化成分として水を主成分とし、オキサゾリジン環開環促進剤を含有させる二液性ウレタン組成物などが提案されている。
【0005】
【特許文献1】
特開平4−36351号公報
【特許文献2】
特開平2−150489号公報
【特許文献3】
特開平8−269319号公報
【特許文献4】
特開平11−279250号公報
【特許文献5】
特開2001−19734号公報
【0006】
【発明が解決しようとする課題】
しかし、これらの方法にはある程度の発泡抑制効果は認められるものの、以下のような問題点が残されている。
すなわち、酸化カルシウムは吸湿剤であり、かつ炭酸ガスも吸収できるが、充分な効果を得るためには、反応性の高い微粒子の酸化カルシウムを使用し、相当高部数配合する必要があるが、これらは耐熱性を低下させたり、酸化カルシウムの分散が容易でないことなどからコストアップ要因となる。また、特許文献2に開示される球状炭酸カルシウムは、特許文献3にも記載されているように、価格や発泡の抑制性能に問題がある。また、特許文献3の脂肪酸塩及びアルキルベンゼンスルフォン酸塩を用いて混合処理した表面処理炭酸カルシウムを配合する方法も、高温多湿などの条件下で経時的に安定した発泡抑制性を発揮させるには不十分である。また、特許文献4の脂肪酸のカルシウム塩と脂肪酸鉛塩とを配合する方法は、環境上問題となる鉛を必須配合とすること、及び脂肪酸カルシウム塩を十分に分散させるのが困難であることに問題がある。更に、特許文献5は、製造コスト、高精度な水分管理を要することなどの工程管理、並びに施工現場での二液混合時にポットライフや硬化時間が現場雰囲気湿度の影響を受けやすいことに問題がある。
【0007】
本発明は、上記実情に鑑みてなされたもので、混合時及び硬化時の雰囲気に左右されずに高温多湿下においても硬化時において優れた発泡抑制性が発揮でき、優れた耐スランプ性および美観、適切な可使時間を示す二液性ポリウレタン樹脂組成物を提供することを目的とする。
【0008】
【課題を解決するための手段】
本発明者らは、上記課題を解決すべく鋭意検討した結果、主剤および硬化剤を有する二液性ポリウレタン樹脂組成物中に、特定の表面処理剤で処理された炭酸カルシウムを配合することにより、混合作業性及び施工作業性に優れ、高温多湿時でも硬化時の発泡抑制性が発揮でき、優れた耐スランプ性および美観、適切な可使時間を示す二液性ポリウレタン樹脂組成物が得られることを見いだし、本発明を完成するに至った。
【0009】
すなわち、本発明の請求項1に係る発明は、主剤、硬化剤および表面処理炭酸カルシウムを有する二液性ポリウレタン樹脂組成物において、前記表面処理炭酸カルシウムが、BET比表面積が8m/g以上の炭酸カルシウムがアルキル化芳香族スルホン酸及びアルキル化芳香族スルホン酸の金属塩よりなる群から選ばれる少なくとも1 種の有機物(A)と、脂肪酸及び脂肪酸の金属塩よりなる群から選ばれる少なくとも1種の有機物(B)とからなり、かつ有機物(A)と有機物(B)が同時に金属塩でなく、有機物(A)と有機物(B)との重量比(A)/(B)が0.05〜1である混合有機物からなる表面処理剤で処理され、前記BET比表面積と表面処理量Aとが下記(1)式を満足することを特徴とする二液性ポリウレタン樹脂組成物を内容とするものである。
1<A/BET<6 (1)
但し、BET:窒素吸着法によるBET比表面積 m/g
A:表面処理量:mg/g・CaCO
【0010】
本発明の請求項2に係る発明は、有機物(A)と有機物(B)とが共に有機酸であることを特徴とする請求項1記載の二液性ポリウレタン樹脂組成物を内容とするものである。
【0011】
本発明の請求項3に係る発明は、表面処理炭酸カルシウムの配合量が、樹脂100重量部に対して10〜300重量部であることを特徴とする請求項1又は2記載の二液性ポリウレタン樹脂組成物を内容とするものである。
【0012】
【発明の実施の形態】
本発明の二液性ポリウレタン樹脂組成物は、主剤、硬化剤および表面処理炭酸カルシウムを有する二液性ポリウレタン樹脂組成物において、前記表面処理炭酸カルシウムが、BET比表面積が8m/g以上の炭酸カルシウムがアルキル化芳香族スルホン酸及びアルキル化芳香族スルホン酸の金属塩よりなる群から選ばれる少なくとも1 種の有機物(A)と、脂肪酸及び脂肪酸の金属塩よりなる群から選ばれる少なくとも1種の有機物(B)とからなり、かつ有機物(A)と有機物(B)が同時に金属塩でなく、有機物(A)と有機物(B)との重量比(A)/(B)が0.05〜1である混合有機物からなる表面処理剤で処理され、前記BET比表面積と表面処理量Aとが下記(1)式を満足することを特徴とするものである。
1<A/BET<6 (1)
但し、BET:窒素吸着法によるBET比表面積 m/g
A:表面処理量:mg/g・CaCO
【0013】
本発明の二液性ポリウレタン樹脂組成物における主剤としては、分子末端に活性イソシアネート基を含有するウレタンプレポリマーを主成分とするものであり、硬化剤としては、イソシアネート基と反応し得る活性水素含有のポリマーである。
【0014】
主剤の主成分である末端イソシアネート基を含有するウレタンプレポリマーは、ポリオールと過剰のポリイソシアネートを反応させることにより製造され、通常イソシアネート基(NCO基)含有量0.5〜5(重量)%のものが使用される。
ポリオールとしては、例えばエチレングリコール、プロピレングリコール、ジエチレングリコール、ジプロピレングリコール、1,3−ブタンジオ−ル、1,4−ブタンジオ−ル、4,4′−ジヒドロキシジフェニルプロパン、4,4′−ジヒドロキシジフェニルメタン、グリセリン、1,2,6−ヘキサントリオ−ル、1,1,1−トリメチロ−ルプロパン、ペンタエリスリット、ソルビット、ショ糖などの分子中に少なくとも2個の活性水素基含有化合物の少なくとも1種に、例えばエチレンオキサイド、プロピレンオキサイドなどのアルキレンオキサイドを付加重合したポリアルキルアルキレンエーテルポリオール、ポリテトラメチレンエーテルポリオール、ポリマーポリオール、ポリブタジエンポリオール等が挙げられ、これらは単独で、または必要に応じ、2種以上組み合わせて用いられる。
【0015】
ポリイソシアネートとしては、例えば2,4−トリレンジイソシアネート、2,6−トリレンジイソシアネート、またはこれらの混合物、粗製トリレンジイソシアネート、4,4′−ジフェニルメタンジイソシアネート、2,4′−ジフェニルメタンジイソシアネートまたはこれらの混合物、ポリメチレンポリフェニルポリイソシアネート(粗製ジフェニルメタンジイソシアネート)、キシリレンジイソシアネート、ヘキサメチレンジイソシアネート、ジシクロヘキシルメタンジイソシアネート、イソホロンジイソシアネート、ヘキサヒドロキシリレンジイソシアネート等が挙げられる。これらは単独で、または必要に応じ、2種以上組合せて用いられる。
【0016】
硬化剤成分としてのイソシアネート基と反応し得る活性水素含有のポリマーは、前記に挙げたポリオールと同じものでよく、特にポリアルキルアルキレンエーテルポリオール等を好適に用いることができる。その他、ポリエステルポリオールや、ポリアルキルアルキレンエーテルポリアミン、ポリアルキルアルキレンエーテルポリアミド、ポリアルキルアルキレンエーテルポリチオール等も用いることができる。これらは単独で、または必要に応じ、2種以上組合せて用いられる。
【0017】
本発明に用いられる炭酸カルシウムは、BET比表面積(窒素吸着法によるBET比表面積)が8m/g以上である以外は特に制限されず、天然石灰石から物理的に粉砕、分級を経て得られた重質炭酸カルシウムや、炭酸カルシウム以外の化合物の形態を経由して化学的に合成して得られた合成炭酸カルシウムの何れでも使用可能であるが、比較的表面積の大きな炭酸カルシウムが得られやすい合成炭酸カルシウムを使用するのが望ましい。BET比表面積は、好ましくは10m/g以上、より好ましくは12m/g以上である。BET比表面積が8m/g未満では、分散性は向上するものの、揺変性(チクソ性、耐スランプ)が低下する。また、BET比表面積の上限は特に制限されないが、製造が容易である点で90m/g程度が好ましく、60m/g程度がより好ましい。BET比表面積が90m/gを越える場合には、表面処理炭酸カルシウムの凝集が起こりやすく分散性が著しく低下し、炭酸カルシウムを十分に分散させるのに多大な労力を要しコストアップ要因となる傾向がある。炭酸カルシウム粒子の形状については特に制限されず、紡錘形、針状、柱状、立方体状、不定形等の何れの形状でも使用可能である。
【0018】
本発明に用いられる有機物(A)のアルキル化芳香族スルホン酸としては、炭素数8〜22の直鎖型もしくは分岐型のアルキル鎖を有するアルキルベンゼンスルホン酸やアルキルナフタレンスルホン酸、ドデシルナフタレンスルホン酸であり、アルキル化芳香族スルホン酸の金属塩としてはアルキルベンゼンスルホン酸やアルキルナフタレンスルホン酸のナトリウム塩やカリウム塩、例えばドデシルベンゼンスルホン酸ナトリウム、ドデシルベンゼンスルホン酸カリウム、ノルマルドデシルベンゼンスルホン酸ナトリウム、ノルマルドデシルベンゼンスルホン酸カリウム等が挙げられる。これらは単独で、または必要に応じ、2種以上組合せて用いられる。
【0019】
本発明に用いられる有機物(B)の脂肪酸及び脂肪酸の金属塩としては、炭素数8〜22の高級脂肪酸及びそのナトリウム塩、カリウム塩が好ましく、例えばステアリン酸、パルミチン酸、オレイン酸、ラウリン酸、ステアリン酸ナトリウム、ステアリン酸カリウム、パルミチン酸ナトリウム、パルミチン酸カリウム、オレイン酸ナトリウム、オレイン酸カリウム、ラウリン酸ナトリウム、ラウリン酸カリウム等が挙げられる。
【0020】
有機物(A)と有機物(B)は、それぞれの混合物からなる表面処理剤として用いられるが、有機物(A)と有機物(B)とが同時に金属塩でないこと、即ち、(A)、(B)のいずれか一方または両方が有機酸であることが必要である。(A)、(B)の両方が共に金属塩である場合は、高温多湿下において、経時的に安定した発泡抑制性を発揮させることができない。特に、(A)、(B)とが共に有機酸であることが好ましい。
【0021】
有機物(A)と有機物(B)との重量比(A)/(B)は、0.05〜1が好ましい。重量比(A)/(B)が0.05より小さいと、主剤と硬化剤を混合した後の硬化過程で発泡が生じやすくなる傾向にあり、逆に、1より大きくなるとポリオールやその他配合成分に対する分散性が低下し、表面処理炭酸カルシウムのブツが残り、外観不良となりやすい。また、揺変性の低下が起こり垂れ流れやすくなる(耐スランプ性が悪くなる)傾向にある。好ましくは0.07〜1、より好ましくは0.09〜0.8である。
【0022】
本発明の表面処理炭酸カルシウムは、前記BET比表面積と表面処理量Aとが下記(1)式を満足することが必要である。
1<A/BET<6 (1)
但し、BET:窒素吸着法によるBET比表面積 m/g
A:表面処理量:mg/g・CaCO
【0023】
また、BET比表面積と表面処理量との比(A/BET)が1以下の場合には、表面処理剤量が不足し、表面処理炭酸カルシウム自体の凝集が起こることがあり、その結果、ブツとして残り、また硬化剤の作製時に分散が不十分となる傾向にあり、主剤との混合後も外観不良となりやすい。また、揺変性が低下し垂れ流れやすくなると共に可使時間が長くなり、発泡が起こりやすくなる傾向にある。一方、比(A/BET)が6以上の場合には、表面処理剤量が過剰となり、炭酸カルシウムの表面から解離する表面処理剤が多くなり、可使時間が著しく短くなる傾向にある。好ましくは、1.5<A/BET<5、さらに好ましくは、2<A/BET<4である。
【0024】
本発明の表面処理炭酸カルシウムは、上記炭酸カルシウムの製造過程もしくは製品の段階において、通常の湿式あるいは乾式の手法により、表面処理剤を添加し表面処理することにより得られる。
【0025】
本発明の表面処理炭酸カルシウムの二液性ポリウレタン樹脂組成物中への配合量は、樹脂本来の性質やシーリング材としての要求物性により適宜選択すればよいが、通常、樹脂100重量部に対して10〜300重量部が適当で、好ましくは20〜150重量部程度である。10重量部未満では発泡抑制性、耐スランプ性、適度な可使時間が得られにくく、一方、300重量部を越えると粘度が高くなりすぎ、作業性に問題が生じることがある。
【0026】
本発明の表面処理炭酸カルシウムは、二液性ポリウレタン樹脂中に充填剤として添加され、ポリオールや可塑剤等の硬化剤成分に対して良好な分散性と揺変性を有し、更に主剤と混合した時に、作業性が良好で、耐スランプ性、低発泡性に優れ、適当な可使時間を有する二液性ポリウレタン樹脂組成物を提供することができる。もちろん、本発明の表面処理炭酸カルシウムは、必要に応じて、公知の充填剤、たとえば重質炭酸カルシウム、シリカ、タルク、クレー、硫酸バリウム等を併用して使用してもよい。
【0027】
本発明に係る二液性ポリウレタン樹脂組成物は、主剤として末端イソシアネート基を含有したウレタンプレポリマーを主成分とし、硬化剤としてイソシアネート基と反応し得る活性水素含有のポリマー及び充填剤を成分とするものであり、充填剤として、アルキル化芳香族スルホン酸及びアルキル化芳香族スルホン酸の金属塩よりなる群から選ばれる少なくとも1 種の有機物(A)と、脂肪酸及び脂肪酸の金属塩よりなる群から選ばれる少なくとも1種の有機物(B)とからなり、かつ有機物(A)と有機物(B)が同時に金属塩でない混合有機物からなる表面処理剤で処理した表面処理炭酸カルシウムを配合してなるものであるが、更に、通常用いられる配合成分が以下のような比率で配合される。
【0028】
主剤:
末端イソシアネート基を含有したウレタンプレポリマー70〜100重量%、可塑剤0〜30重量%、及びその他添加剤0〜5重量%(合計100重量%)
硬化剤:
イソシアネート基と反応し得る活性水素含有ポリマー5〜30重量%、充填剤40〜80重量%、可塑剤5〜30重量%、及び硬化促進触媒0. 1〜3重量%(合計100重量%)
【0029】
上記主剤と硬化剤を1:10〜1:1(重量比)の比率で混合し、二液性ポリウレタン樹脂組成物を得る。この際、主剤成分のイソシアネート基と、硬化剤成分のイソシアネート基と反応し得る活性水素基の当量比は、概ね1:1〜1. 5:1となるように配合比率が決定される。主剤成分のイソシアネート基が上記範囲より少ない場合は、硬化後の硬化性組成物中に活性水素含有ポリマーが未反応の状態で存在し、著しい接着強度の低下をもたらすと共に表面粘着を発生させ、ほこりの付着等による汚れが発生しやすくなる。一方、主剤成分のイソシアネート基が上記範囲より多い場合は、イソシアネート基が水分と反応する割合が高くなるため、発泡を起こしやすくなる。
【0030】
可塑剤としては、ジオクチルフタレート(DOP)、ジブチルフタレート(DBP)、ジヘプチルフタレート(DHP)、ジイソノニルフタレート(DINP)、トリメリット酸トリオクチル(TOTM)、トリメリット酸トリイソデシル(TITM)のような芳香族カルボン酸エステルや、アジピン酸ジオクチル(DOA)、アジピン酸ジイソデシル(DIDN)、アジピン酸オクチルデシル(DOA)、アゼライン酸ジオクチル(DOZ)、セバシン酸ジオクチル(DOS)等の脂肪族カルボン酸エステルや、トリクレジルホスフェート等のリン酸エステル系可塑剤、塩素化パラフィン、アルキルベンゼン等が挙げられ、これらは単独で、または必要に応じ2種以上組み合わせて用いられる。なお、上記可塑剤を、必要に応じ主剤成分である末端イソシアネート基含有ウレタンプレポリマーにも添加してよい。
【0031】
硬化促進触媒としては、オクチル酸鉛、オクチル酸錫、ジブチル錫ラウレート、ナフテン酸鉛、ナフテン酸コバルト、ジメチル錫ジクロライド、オクチル酸ビスマス、ジブチル錫ジアセチルアセトネート、ジブチル錫シリケート、ジイソプロポキシチタンジアセチルアセトネートなどの有機酸金属石鹸、N−アルキルモルホリン、N−アルキルピペラジン、N,N,N′,N′−テトラメチルエチルジアミンなどの三級アミン等が挙げられ、これらは単独で、または必要に応じ2種以上組み合わせて用いられる。
【0032】
これら配合成分の他に、揺変剤(微粉末シリカ、ベントナイト等)、有機溶剤(トルエン、キシレン、脂肪族炭化水素類等)、着色剤(酸化チタン、カーボンブラック等)等を硬化剤成分に適量配合して使用してもよい。もちろん、本発明の主旨に反しない限り、一般的な炭酸カルシウムを増量剤的に配合してもよい。
【0033】
上記の如くして得られる本発明の二液性ポリウレタン樹脂組成物は、主剤と硬化剤の混合作業性ないし施工作業性が良好で、高温多湿下でも硬化の際における発泡抑制効果に優れ、かつ耐スランプ性に優れ、特にシーリング材、接着剤として有用なシーリング材の他に、接着剤、コーティング材や各種成型品に使用することもできる。
【0034】
【実施例】
実施例1〜11、比較例1〜8
(1)主剤の調整
末端イソシアネート基を含有するウレタンプレポリマー(武田薬品工業株式会社製、タケネートL1032;NCO=2.95%、粘度9,800cps/25℃)を主剤成分とした。
【0035】
(2)硬化剤の調整
イソシアネート基と反応し得る活性水素含有ポリマー(武田薬品工業株式会社製、タケラックP74;OH価=74のPPG)を45重量部、充填剤として表1に示す表面処理炭酸カルシウムを190重量部、可塑剤としてジオクチルフタレート(DOP)を61重量部、触媒としてオクチル酸鉛(Pb20%)を4重量部計量し、高荷重バッチ混合機で10分間混合脱泡攪拌し均一な硬化剤ペーストを作製した。
【0036】
(3)上記の主剤100重量部に対し、上記(2)の硬化剤を300重量部を配合し、高荷重バッチ混合機で3分間混合脱泡攪拌し、施工用シーラントを試作し、下記の試験方法により硬化後の外観、発泡抑制性、耐スランプ性、可使時間を測定した。測定結果を表1に示す。
【0037】
試験方法:
(1)外観試験
施工用シーラントをヘラにて約30mm×100mm、、厚み15mmに成形し、分散不良にともないブツの有無を肉眼で観察し、下記の基準で判定した。
◎:ブツが殆ど認められない。
○:ブツが僅かに認められる。
△:ブツが沢山認められる。
【0038】
(2)発泡抑制性
施工用シーラントを直径50mm、高さ50mmで100mlのポリカップに充填し、振動を与えて表面を平滑にした後、室温50℃、相対湿度65% に調整したオーブン中に48時間放置し、発泡による膨張高さ(mm)を測定した。従って、数字が少ないほど発泡抑制性が良好と判断できる。
【0039】
(3)耐スランプ性
施工用シーラントをJISA5758準拠のスランプ試験を行った。垂れ流れた長さをmm単位で測定し、数字が大きいほどスランプしやすい、すなわちスランプ性が不良と判断できる。
【0040】
(4)可使時間
施工用シーラントをJISA5758に準じて20℃での可使時間の測定を行った。可使時間は施工用シーラント作成後、数時間あれば良く、2時間より短かったり、10時間以上の長時間のものは、配合設計での硬化時間調整が困難となり望ましくない。
【0041】
【表1】

Figure 2004231782
【0042】
尚、表1中、表面処理剤量及び合計処理量Aは、いずれもmg/g.CaCOである。また、表面処理剤A1、A2、B1、およびB2は、それぞれ下記の表面処理剤を表す。
【0043】
表面処理剤: A1:ドデシルベンゼンスルホン酸
A2:ドデシルベンゼンスルホン酸ナトリウム
B1:工業用ステアリン酸
B2:工業用ステアリン酸カリ石けん
【0044】
表1から、主剤および硬化剤を有する二液性ポリウレタン樹脂組成物中に、アルキル化芳香族スルホン酸及びアルキル化芳香族スルホン酸の金属塩よりなる群から選ばれる少なくとも1 種の有機物(A)と、脂肪酸及び脂肪酸の金属塩よりなる群から選ばれる少なくとも1種の有機物(B)とからなり、かつ有機物(A)と有機物(B)が同時に金属塩でない混合有機物からなる表面処理剤で処理した表面処理炭酸カルシウムが配合されてなる二液性ポリウレタン組成物は、発泡抑制性に優れ、外観、耐スランプ性、可使時間ともに優れたシーリング材となることが明らかである(実施例1〜11)。中でも、(A)、(B)同時に有機酸である表面処理剤で処理された表面処理炭酸カルシウムを含有する二液性ポリウレタン樹脂組成物は、一層優れたシーリング材となることが明らかである(実施例1〜7)。
【0045】
【発明の効果】
以上のように、本発明の二液性ポリウレタン樹脂組成物は、特定の表面処理剤で処理された表面処理炭酸カルシウムを用いたことにより、他の成分との分散性に優れ、均質な低粘度の硬化剤ペーストを製造でき、主剤との混合作業性が容易となり、また発泡が抑制され外観が良好である。また耐スランプ性に優れるので施工後に垂れ流れが発生することがなく、さらに、好適な可使時間をとることができ、配合設計が容易である。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is a two-component polyurethane resin composition having a main agent and a curing agent, and more specifically, has a good mixing workability or construction workability between the main agent and the curing agent, and has an effect of suppressing foaming during curing even under high temperature and high humidity. The present invention relates to a two-part polyurethane resin composition having excellent slump resistance, particularly having an appropriate pot life, and having excellent aesthetic appearance and being useful as a sealing material and an adhesive.
[0002]
[Prior art]
The sealing material made of a polyurethane resin composition has better controllability and cost performance than the sealing material made of a resin composition such as a silicone-based, modified silicone-based, polysulfide-based, acrylic urethane-based, SBR-based, and butyl rubber-based resin. It is easy to construct, easy to set up, and after curing, it becomes a flexible elastic body with excellent airtightness and waterproofness, and has high durability. It is widely used in construction, marine, vehicles, and other fields.
[0003]
Polyurethane resin compositions include a moisture-curable one-pack polyurethane resin composition and a polyol-curable two-pack polyurethane resin composition. Things are excellent. However, at the time of curing, air bubbles are generated at a contact portion with the application base and cause poor adhesion, bubbles are generated on the surface by air bubbles, cracks are generated, sealing performance is reduced, and appearance defects are easily caused. Contains the problem.
[0004]
As a solution to this problem, calcium carbonate surface-treated with a surface treatment agent containing calcium oxide and alkylbenzenesulfonic acid is contained (Patent Document 1), and spherical calcium carbonate surface-treated with a higher fatty acid alkali metal salt is blended. (Patent Document 2), to include a surface-treated calcium carbonate mixed and treated with a fatty acid salt and an alkylbenzene sulfonate (Patent Document 3), or to include a calcium salt of a fatty acid and a fatty acid lead salt (Patent Document 2). 4) A two-pack containing, as a main component, a urethane polymer containing a terminal free isocyanate group obtained by reacting with N-hydroxyalkyl-oxazolidine as a main component, water as a curing component, and an oxazolidine ring opening accelerator. Urethane compositions have been proposed.
[0005]
[Patent Document 1]
JP-A-4-36351 [Patent Document 2]
JP-A-2-150489 [Patent Document 3]
JP-A-8-269319 [Patent Document 4]
JP-A-11-279250 [Patent Document 5]
Japanese Patent Application Laid-Open No. 2001-19734
[Problems to be solved by the invention]
However, these methods have some foam suppressing effects, but have the following problems.
That is, calcium oxide is a hygroscopic agent and can also absorb carbon dioxide, but in order to obtain a sufficient effect, it is necessary to use calcium oxide of highly reactive fine particles, and it is necessary to mix a considerably high number of them. In addition, the heat resistance is reduced, and the dispersion of calcium oxide is not easy, which causes an increase in cost. Further, the spherical calcium carbonate disclosed in Patent Literature 2 has problems in price and foam suppression performance as described in Patent Literature 3. Further, the method of blending a surface-treated calcium carbonate mixed and treated with a fatty acid salt and an alkylbenzene sulfonate described in Patent Document 3 is also not suitable for exhibiting stable foam suppression over time under conditions such as high temperature and high humidity. It is enough. Moreover, the method of blending a calcium salt of a fatty acid and a lead salt of a fatty acid described in Patent Document 4 requires that lead, which is environmentally problematic, be indispensable, and that it is difficult to sufficiently disperse the fatty acid calcium salt. There's a problem. Furthermore, Patent Literature 5 has a problem in that the production cost, the process control such as the need for high-precision moisture management, and the pot life and curing time are easily affected by the on-site atmosphere humidity when mixing two components at the construction site. is there.
[0007]
The present invention has been made in view of the above-mentioned circumstances, and can exhibit excellent foaming suppression properties at the time of curing even under high temperature and high humidity without being influenced by the atmosphere at the time of mixing and curing, and has excellent slump resistance and aesthetic appearance. It is an object of the present invention to provide a two-component polyurethane resin composition exhibiting an appropriate pot life.
[0008]
[Means for Solving the Problems]
The present inventors have conducted intensive studies to solve the above problems, and as a result, by blending calcium carbonate treated with a specific surface treatment agent in a two-component polyurethane resin composition having a main agent and a curing agent, It is excellent in mixing workability and construction workability, can exhibit foam suppression during curing even at high temperature and high humidity, and can obtain a two-component polyurethane resin composition that shows excellent slump resistance and aesthetic appearance, and appropriate pot life. And completed the present invention.
[0009]
That is, the invention according to claim 1 of the present invention provides a two-pack polyurethane resin composition having a base agent, a curing agent, and surface-treated calcium carbonate, wherein the surface-treated calcium carbonate has a BET specific surface area of 8 m 2 / g or more. At least one organic substance (A) wherein calcium carbonate is selected from the group consisting of alkylated aromatic sulfonic acids and metal salts of alkylated aromatic sulfonic acids; and at least one organic substance selected from the group consisting of fatty acids and metal salts of fatty acids And the organic substance (A) and the organic substance (B) are not metal salts at the same time, and the weight ratio (A) / (B) of the organic substance (A) and the organic substance (B) is 0.05. Wherein the BET specific surface area and surface treatment amount A satisfy the following formula (1): The composition is for the content.
1 <A / BET <6 (1)
However, BET: BET specific surface area by nitrogen adsorption method m 2 / g
A: Surface treatment amount: mg / g · CaCO 3
[0010]
The invention according to claim 2 of the present invention is characterized in that the organic substance (A) and the organic substance (B) are both organic acids, and comprises the two-component polyurethane resin composition according to claim 1. is there.
[0011]
The two-component polyurethane according to claim 1 or 2, wherein the amount of the surface-treated calcium carbonate is 10 to 300 parts by weight based on 100 parts by weight of the resin. It contains a resin composition.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
The two-component polyurethane resin composition of the present invention is a two-component polyurethane resin composition having a main agent, a curing agent and surface-treated calcium carbonate, wherein the surface-treated calcium carbonate has a BET specific surface area of 8 m 2 / g or more. Calcium is at least one organic substance (A) selected from the group consisting of alkylated aromatic sulfonic acids and metal salts of alkylated aromatic sulfonic acids, and at least one organic substance selected from the group consisting of fatty acids and metal salts of fatty acids. An organic substance (B), and the organic substance (A) and the organic substance (B) are not metal salts at the same time, and the weight ratio (A) / (B) of the organic substance (A) and the organic substance (B) is 0.05 to Wherein the BET specific surface area and the surface treatment amount A satisfy the following formula (1).
1 <A / BET <6 (1)
However, BET: BET specific surface area by nitrogen adsorption method m 2 / g
A: Surface treatment amount: mg / g · CaCO 3
[0013]
The main component in the two-component polyurethane resin composition of the present invention is a component mainly composed of a urethane prepolymer having an active isocyanate group at a molecular terminal, and as a curing agent, an active hydrogen-containing component capable of reacting with an isocyanate group. Polymer.
[0014]
Urethane prepolymers containing terminal isocyanate groups, which are the main component of the main ingredient, are produced by reacting a polyol with an excess of polyisocyanate, and usually have an isocyanate group (NCO group) content of 0.5 to 5 (wt)%. Things are used.
Examples of the polyol include ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, 1,3-butanediol, 1,4-butanediol, 4,4′-dihydroxydiphenylpropane, 4,4′-dihydroxydiphenylmethane, Glycerin, 1,2,6-hexanetriol, 1,1,1-trimethylolpropane, pentaerythritol, sorbitol, at least one compound having at least two active hydrogen groups in the molecule, etc. For example, polyalkylene ether polyols, polytetramethylene ether polyols, polymer polyols, polybutadiene polyols, etc. obtained by addition polymerization of alkylene oxides such as ethylene oxide and propylene oxide, and the like. In, or if necessary, it is used in combination of two or more.
[0015]
As the polyisocyanate, for example, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, or a mixture thereof, crude tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, 2,4'-diphenylmethane diisocyanate, or a mixture thereof Examples thereof include a mixture, polymethylene polyphenyl polyisocyanate (crude diphenylmethane diisocyanate), xylylene diisocyanate, hexamethylene diisocyanate, dicyclohexyl methane diisocyanate, isophorone diisocyanate, and hexahydroxylylene diisocyanate. These may be used alone or, if necessary, in combination of two or more.
[0016]
The active hydrogen-containing polymer capable of reacting with an isocyanate group as a curing agent component may be the same as the above-mentioned polyol, and a polyalkylalkylene ether polyol or the like can be particularly preferably used. In addition, polyester polyol, polyalkylalkylene ether polyamine, polyalkylalkylene ether polyamide, polyalkylalkylene ether polythiol, and the like can also be used. These may be used alone or, if necessary, in combination of two or more.
[0017]
The calcium carbonate used in the present invention is not particularly limited except that the BET specific surface area (BET specific surface area measured by a nitrogen adsorption method) is 8 m 2 / g or more, and is obtained from natural limestone through physical pulverization and classification. Any of heavy calcium carbonate and synthetic calcium carbonate obtained by chemically synthesizing via the form of a compound other than calcium carbonate can be used. It is desirable to use calcium carbonate. The BET specific surface area is preferably at least 10 m 2 / g, more preferably at least 12 m 2 / g. When the BET specific surface area is less than 8 m 2 / g, the dispersibility is improved, but the thixotropic properties (thixotropic properties, slump resistance) are reduced. Although not limit BET specific surface area is particularly limited, is preferably about 90m 2 / g in terms manufacturing is easy, about 60 m 2 / g is more preferable. When the BET specific surface area exceeds 90 m 2 / g, aggregation of the surface-treated calcium carbonate is apt to occur, and the dispersibility is remarkably reduced, so that much labor is required to sufficiently disperse the calcium carbonate, which causes a cost increase. Tend. The shape of the calcium carbonate particles is not particularly limited, and any shape such as a spindle shape, a needle shape, a column shape, a cubic shape, and an irregular shape can be used.
[0018]
Examples of the alkylated aromatic sulfonic acid of the organic substance (A) used in the present invention include alkylbenzenesulfonic acid, alkylnaphthalenesulfonic acid, and dodecylnaphthalenesulfonic acid having a linear or branched alkyl chain having 8 to 22 carbon atoms. There are, as metal salts of alkylated aromatic sulfonic acids, sodium salts and potassium salts of alkyl benzene sulfonic acid and alkyl naphthalene sulfonic acid, for example, sodium dodecyl benzene sulfonate, potassium dodecyl benzene sulfonate, normal dodecyl benzene sulfonate, normal dodecyl And potassium benzenesulfonate. These may be used alone or, if necessary, in combination of two or more.
[0019]
As the fatty acid and the metal salt of the fatty acid of the organic substance (B) used in the present invention, higher fatty acids having 8 to 22 carbon atoms and their sodium and potassium salts are preferable. For example, stearic acid, palmitic acid, oleic acid, lauric acid, Examples include sodium stearate, potassium stearate, sodium palmitate, potassium palmitate, sodium oleate, potassium oleate, sodium laurate, potassium laurate and the like.
[0020]
The organic substance (A) and the organic substance (B) are used as a surface treatment agent composed of a mixture of each, and the organic substance (A) and the organic substance (B) are not simultaneously a metal salt, that is, (A), (B) Is required to be an organic acid. When both (A) and (B) are metal salts, it is not possible to exhibit a stable foam suppressing property with time under high temperature and high humidity. In particular, both (A) and (B) are preferably organic acids.
[0021]
The weight ratio (A) / (B) of the organic substance (A) and the organic substance (B) is preferably 0.05 to 1. If the weight ratio (A) / (B) is less than 0.05, foaming tends to occur in the curing process after mixing the main agent and the curing agent, and if it is greater than 1, polyol and other compounding components Of the surface-treated calcium carbonate remains, and the appearance tends to be poor. In addition, the thixotropic properties tend to decrease, and the liquid tends to run down (slump resistance deteriorates). Preferably it is 0.07-1, more preferably 0.09-0.8.
[0022]
In the surface-treated calcium carbonate of the present invention, the BET specific surface area and the surface treatment amount A need to satisfy the following expression (1).
1 <A / BET <6 (1)
However, BET: BET specific surface area by nitrogen adsorption method m 2 / g
A: Surface treatment amount: mg / g · CaCO 3
[0023]
When the ratio (A / BET) between the BET specific surface area and the surface treatment amount is 1 or less, the amount of the surface treatment agent is insufficient, and aggregation of the surface-treated calcium carbonate itself may occur. And the dispersion tends to be insufficient at the time of preparing the curing agent, and the appearance tends to be poor even after mixing with the main agent. In addition, thixotropy tends to be reduced, the liquid tends to hang down, and the working life is prolonged, and foaming tends to occur. On the other hand, when the ratio (A / BET) is 6 or more, the amount of the surface treatment agent becomes excessive, the amount of the surface treatment agent dissociated from the surface of the calcium carbonate increases, and the pot life tends to be significantly shortened. Preferably, 1.5 <A / BET <5, and more preferably, 2 <A / BET <4.
[0024]
The surface-treated calcium carbonate of the present invention can be obtained by adding a surface-treating agent and performing a surface treatment by a usual wet or dry method in the above-mentioned calcium carbonate production process or product stage.
[0025]
The amount of the surface-treated calcium carbonate of the present invention in the two-component polyurethane resin composition may be appropriately selected depending on the intrinsic properties of the resin and the required physical properties as a sealing material. 10 to 300 parts by weight is appropriate, and preferably about 20 to 150 parts by weight. If the amount is less than 10 parts by weight, it is difficult to obtain foam suppressing properties, slump resistance, and an appropriate pot life. On the other hand, if it exceeds 300 parts by weight, the viscosity becomes too high, which may cause a problem in workability.
[0026]
The surface-treated calcium carbonate of the present invention is added as a filler in a two-component polyurethane resin, has good dispersibility and thixotropic properties with respect to a curing agent component such as a polyol or a plasticizer, and is further mixed with a main agent. Occasionally, it is possible to provide a two-component polyurethane resin composition having good workability, excellent slump resistance and low foaming property, and having an appropriate pot life. Of course, the surface-treated calcium carbonate of the present invention may be used in combination with a known filler such as heavy calcium carbonate, silica, talc, clay, barium sulfate and the like, if necessary.
[0027]
The two-component polyurethane resin composition according to the present invention has, as a main component, a urethane prepolymer containing a terminal isocyanate group as a main component and, as a curing agent, an active hydrogen-containing polymer capable of reacting with an isocyanate group and a filler as components. And at least one organic substance (A) selected from the group consisting of alkylated aromatic sulfonic acids and metal salts of alkylated aromatic sulfonic acids, and a filler selected from the group consisting of fatty acids and metal salts of fatty acids. A mixture of at least one selected organic substance (B) and a surface-treated calcium carbonate treated with a surface treatment agent comprising a mixed organic substance in which the organic substance (A) and the organic substance (B) are not metal salts at the same time. However, further, commonly used components are blended in the following ratio.
[0028]
Main agent:
70-100% by weight of urethane prepolymer containing terminal isocyanate group, 0-30% by weight of plasticizer, and 0-5% by weight of other additives (total 100% by weight)
Curing agent:
5 to 30% by weight of an active hydrogen-containing polymer capable of reacting with isocyanate groups, 40 to 80% by weight of a filler, 5 to 30% by weight of a plasticizer, and 0. 1-3% by weight (total 100% by weight)
[0029]
The above main agent and curing agent are mixed at a ratio of 1:10 to 1: 1 (weight ratio) to obtain a two-part polyurethane resin composition. At this time, the equivalent ratio of the isocyanate group of the main component to the active hydrogen group capable of reacting with the isocyanate group of the curing agent component is generally 1: 1 to 1. The mixing ratio is determined so as to be 5: 1. When the isocyanate group of the main component is less than the above range, the active hydrogen-containing polymer is present in an unreacted state in the curable composition after curing, causing a significant decrease in adhesive strength and causing surface tackiness, and Contamination due to the adhesion of water is likely to occur. On the other hand, when the isocyanate group of the main component is more than the above range, the rate at which the isocyanate group reacts with moisture increases, so that foaming is easily caused.
[0030]
Examples of the plasticizer include aromatics such as dioctyl phthalate (DOP), dibutyl phthalate (DBP), diheptyl phthalate (DHP), diisononyl phthalate (DINP), trioctyl trimellitate (TOTM), and triisodecyl trimellitate (TITM). Carboxylic acid esters, aliphatic carboxylic acid esters such as dioctyl adipate (DOA), diisodecyl adipate (DIDN), octyl decyl adipate (DOA), dioctyl azelate (DOZ), dioctyl sebacate (DOS); Phosphate plasticizers such as cresyl phosphate, chlorinated paraffins, alkylbenzenes, and the like can be mentioned, and these are used alone or in combination of two or more as necessary. The above-mentioned plasticizer may be added to the urethane prepolymer having a terminal isocyanate group as a main component, if necessary.
[0031]
As the curing promoting catalyst, lead octylate, tin octylate, dibutyltin laurate, lead naphthenate, cobalt naphthenate, dimethyltin dichloride, bismuth octylate, dibutyltin diacetylacetonate, dibutyltin silicate, diisopropoxytitanium diacetylacetate Tertiary amines such as N-alkylmorpholine, N-alkylpiperazine, N, N, N ', N'-tetramethylethyldiamine, etc., alone or when necessary. They may be used in combination of two or more.
[0032]
In addition to these components, thixotropic agents (fine powdered silica, bentonite, etc.), organic solvents (toluene, xylene, aliphatic hydrocarbons, etc.), coloring agents (titanium oxide, carbon black, etc.), etc. are used as curing agent components. You may mix and use an appropriate amount. Of course, general calcium carbonate may be added as a bulking agent as long as it does not contradict the gist of the present invention.
[0033]
The two-component polyurethane resin composition of the present invention obtained as described above has good mixing workability or construction workability of the main agent and the curing agent, is excellent in foaming suppression effect at the time of curing even under high temperature and high humidity, and It is excellent in slump resistance and particularly useful as a sealing material and a sealing material, and can also be used for an adhesive, a coating material and various molded products.
[0034]
【Example】
Examples 1 to 11, Comparative Examples 1 to 8
(1) Adjustment of Main Agent A urethane prepolymer containing terminal isocyanate groups (Takenate L1032, manufactured by Takeda Pharmaceutical Co., Ltd .; NCO = 2.95%, viscosity 9,800 cps / 25 ° C.) was used as the main agent component.
[0035]
(2) Preparation of Curing Agent 45 parts by weight of an active hydrogen-containing polymer (TAKERAC P74, manufactured by Takeda Pharmaceutical Co., Ltd .; PPG having an OH value of 74) capable of reacting with an isocyanate group, and a surface-treated carbonic acid shown in Table 1 as a filler. 190 parts by weight of calcium, 61 parts by weight of dioctyl phthalate (DOP) as a plasticizer, and 4 parts by weight of lead octylate (Pb 20%) as a catalyst are mixed and defoamed with a high-load batch mixer for 10 minutes, followed by uniform stirring. A hardener paste was prepared.
[0036]
(3) 300 parts by weight of the curing agent of the above (2) was mixed with 100 parts by weight of the above main agent, mixed and defoamed and stirred for 3 minutes by a high-load batch mixer, and a sealant for construction was trial-produced. The appearance after curing, foam suppression, slump resistance, and pot life were measured by the test method. Table 1 shows the measurement results.
[0037]
Test method:
(1) Appearance test A sealant for construction was formed with a spatula to a size of about 30 mm x 100 mm and a thickness of 15 mm, and the presence or absence of bumps due to poor dispersion was visually observed, and judged according to the following criteria.
:: Almost no bumps were observed.
:: Slight bumps are observed.
Δ: Many spots were observed.
[0038]
(2) Foaming Inhibition Filling a 100 ml polycup having a diameter of 50 mm and a height of 50 mm into a polycup, shaking the surface by applying vibration, and placing the sealant in an oven adjusted to a room temperature of 50 ° C. and a relative humidity of 65%. After leaving for a time, the expansion height (mm) due to foaming was measured. Therefore, it can be judged that the smaller the number is, the better the foam suppressing property is.
[0039]
(3) Slump resistance A slump test according to JIS A5758 was performed on the sealant for construction. The length of the dripping is measured in units of mm, and the larger the number, the easier the slump is, that is, it can be determined that the slump property is poor.
[0040]
(4) Pot life The pot life at 20 ° C. of the construction sealant was measured in accordance with JIS A5758. The pot life may be several hours after the working sealant is prepared, and a pot life shorter than 2 hours or longer than 10 hours is not desirable because it is difficult to adjust the curing time in the formulation design.
[0041]
[Table 1]
Figure 2004231782
[0042]
In Table 1, the amount of the surface treatment agent and the total amount of treatment A are both mg / g. CaCO 3 . The surface treatment agents A1, A2, B1, and B2 represent the following surface treatment agents, respectively.
[0043]
Surface treatment agent: A1: dodecylbenzenesulfonic acid A2: sodium dodecylbenzenesulfonate B1: industrial stearic acid B2: industrial potash soap
From Table 1, at least one organic substance (A) selected from the group consisting of alkylated aromatic sulfonic acids and metal salts of alkylated aromatic sulfonic acids is contained in the two-component polyurethane resin composition having the main agent and the curing agent. And at least one organic substance (B) selected from the group consisting of a fatty acid and a metal salt of a fatty acid, and a surface treatment agent comprising a mixed organic substance in which the organic substance (A) and the organic substance (B) are not metal salts at the same time. It is clear that the two-component polyurethane composition containing the treated surface-treated calcium carbonate is a sealing material having excellent foam suppressing properties and excellent appearance, slump resistance and pot life (Examples 1 to 5). 11). Above all, it is clear that the two-pack polyurethane resin composition containing (A) and (B) surface-treated calcium carbonate treated with a surface treating agent which is an organic acid at the same time becomes a more excellent sealing material ( Examples 1-7).
[0045]
【The invention's effect】
As described above, the two-component polyurethane resin composition of the present invention has excellent dispersibility with other components and uniform low viscosity by using surface-treated calcium carbonate treated with a specific surface treatment agent. Can be manufactured, the workability of mixing with the main agent becomes easy, foaming is suppressed, and the appearance is good. In addition, since it is excellent in slump resistance, no dripping flow occurs after construction, and a suitable pot life can be obtained, and the blending design is easy.

Claims (3)

主剤、硬化剤および表面処理炭酸カルシウムを有する二液性ポリウレタン樹脂組成物において、前記表面処理炭酸カルシウムが、BET比表面積が8m/g以上の炭酸カルシウムがアルキル化芳香族スルホン酸及びアルキル化芳香族スルホン酸の金属塩よりなる群から選ばれる少なくとも1 種の有機物(A)と、脂肪酸及び脂肪酸の金属塩よりなる群から選ばれる少なくとも1種の有機物(B)とからなり、かつ有機物(A)と有機物(B)が同時に金属塩でなく、有機物(A)と有機物(B)との重量比(A)/(B)が0.05〜1である混合有機物からなる表面処理剤で処理され、前記BET比表面積と表面処理量Aとが下記(1)式を満足することを特徴とする二液性ポリウレタン樹脂組成物。
1<A/BET<6 (1)
但し、BET:窒素吸着法によるBET比表面積 m/g
A:表面処理量:mg/g・CaCO
In a two-component polyurethane resin composition having a main agent, a curing agent, and a surface-treated calcium carbonate, the surface-treated calcium carbonate is a calcium carbonate having a BET specific surface area of 8 m 2 / g or more is an alkylated aromatic sulfonic acid and an alkylated aromatic At least one organic substance (A) selected from the group consisting of metal salts of aromatic sulfonic acids, and at least one organic substance (B) selected from the group consisting of fatty acids and metal salts of fatty acids; ) And the organic substance (B) are not metal salts at the same time and are treated with a surface treating agent comprising a mixed organic substance in which the weight ratio (A) / (B) of the organic substance (A) and the organic substance (B) is 0.05 to 1. The two-part polyurethane resin composition, wherein the BET specific surface area and the surface treatment amount A satisfy the following formula (1).
1 <A / BET <6 (1)
However, BET: BET specific surface area by nitrogen adsorption method m 2 / g
A: Surface treatment amount: mg / g · CaCO 3
有機物(A)と有機物(B)とが共に有機酸であることを特徴とする請求項1記載の二液性ポリウレタン樹脂組成物。The two-component polyurethane resin composition according to claim 1, wherein both the organic substance (A) and the organic substance (B) are organic acids. 表面処理炭酸カルシウムの配合量が、樹脂100重量部に対して10〜300重量部であることを特徴とする請求項1又は2記載の二液性ポリウレタン樹脂組成物。The two-component polyurethane resin composition according to claim 1 or 2, wherein the amount of the surface-treated calcium carbonate is 10 to 300 parts by weight based on 100 parts by weight of the resin.
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Publication number Priority date Publication date Assignee Title
JP2018065964A (en) * 2016-10-21 2018-04-26 白石工業株式会社 Polyurethane resin composition and method for producing the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018065964A (en) * 2016-10-21 2018-04-26 白石工業株式会社 Polyurethane resin composition and method for producing the same
JP7109759B2 (en) 2016-10-21 2022-08-01 白石工業株式会社 POLYURETHANE RESIN COMPOSITION AND METHOD FOR MANUFACTURING SAME

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