JP6739781B2 - 水硬性組成物用分散保持剤、水硬性組成物用分散保持剤の使用方法、及び水硬性組成物の調製方法 - Google Patents
水硬性組成物用分散保持剤、水硬性組成物用分散保持剤の使用方法、及び水硬性組成物の調製方法 Download PDFInfo
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- JP6739781B2 JP6739781B2 JP2016081867A JP2016081867A JP6739781B2 JP 6739781 B2 JP6739781 B2 JP 6739781B2 JP 2016081867 A JP2016081867 A JP 2016081867A JP 2016081867 A JP2016081867 A JP 2016081867A JP 6739781 B2 JP6739781 B2 JP 6739781B2
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- DZLFLBLQUQXARW-UHFFFAOYSA-N tetrabutylammonium Chemical group CCCC[N+](CCCC)(CCCC)CCCC DZLFLBLQUQXARW-UHFFFAOYSA-N 0.000 description 1
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- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229940035024 thioglycerol Drugs 0.000 description 1
- NJRXVEJTAYWCQJ-UHFFFAOYSA-N thiomalic acid Chemical compound OC(=O)CC(S)C(O)=O NJRXVEJTAYWCQJ-UHFFFAOYSA-N 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- 125000005628 tolylene group Chemical group 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- 125000002469 tricosyl 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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002889 tridecyl 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])[H] 0.000 description 1
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical group CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 1
- 125000002948 undecyl 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])[H] 0.000 description 1
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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Macromonomer-Based Addition Polymer (AREA)
Description
R1,R2:水素原子、メチル基又は下記の化3で示される有機基
p:0又は1
X:下記の化4で示される有機基
Y:下記の化5で示される有機基
M1:水素原子、アンモニウム基、有機アミン基、アルカリ金属又は1/2当量のアルカリ土類金属
M2:水素原子、アンモニウム基、有機アミン基、アルカリ金属又は1/2当量のアルカリ土類金属
AO:炭素数2〜4のオキシアルキレン基
m:1〜10の整数
R3:ヘテロ原子を有する場合のあるアルキレン基、芳香環基又は不飽和炭化水素基
s:0〜4の整数
t:0または1
AO:炭素数2〜4のオキシアルキレン基
n:0〜300の整数
R4:水素原子、炭素数1〜22のアルキル基又は炭素数1〜22の脂肪族アシル基(但し、n=0のときはR4は炭素数1〜22のアルキル基又は炭素数1〜22の脂肪族アシル基)
また、本発明の別の態様の水硬性組成物用分散保持剤の使用方法は、前記水硬性組成物用分散保持剤を、水溶性ビニル共重合体を含む水硬性組成物用分散剤と併用することを特徴とする。
また、本発明の別の態様の水硬性組成物の調製方法は、前記水硬性組成物用分散保持剤、及び水溶性ビニル共重合体を含む水硬性組成物用分散剤を、水硬性組成物に配合することを特徴とする。
・単量体(A−5)の合成
ヒドロキシエチルアクリレート127.7g、トリメリット酸無水物192.1g、4−メトキシフェノール0.64g、ピリジン300mLを温度計、撹拌機、空気導入管を備えた反応容器に仕込み、撹拌しながら均一に溶解した後、乾燥した空気を5mL/分の流量で吹き込みながら、昇温し、80℃の温度で、8時間反応させた。反応終了後、エバポレーターにてピリジンを留去し、ヒドロキシエチルアクリレートとトリメリット酸のモノエステル体(A−5)を得た。
ヒドロキシプロピルアクリレート130.1g、コハク酸無水物110.1g、フェノチアジン0.13gを温度計、撹拌機、空気導入管を備えた反応容器に仕込み、乾燥した空気を3mL/分の流量で吹き込みながら昇温し、100℃で10時間反応させた。反応終了後、冷却し、ヒドロキシプロピルアクリレートとコハク酸のモノエステル体(A−6)を得た。
・実施例1{ビニル共重合体(EX−1)の合成等}
イオン交換水29.2g、α−(3−メチル−3−ブテニル)−ω−ヒドロキシ−ポリ(n=53)オキシエチレン174.2gを温度計、撹拌機、滴下ロート、窒素導入管を備えた反応容器に仕込み、攪拌しながら均一に溶解した後、雰囲気を窒素置換し、反応系の温度を温水浴にて65℃とした。次に3.5%過酸化水素水10.8gを3時間かけて滴下すると共に、イオン交換水174.2gに2−アクリロイロキシエチルコハク酸15.2gとヒドロキシエチルアクリレート28.3gを懸濁させた水溶液を3時間かけて滴下し、またイオン交換7.3gにL−アスコルビン酸1.0gとメルカプトエタノール0.8gを溶解させた水溶液を4時間かけて滴下した。その後、2時間65℃を維持し、重合反応を終了した。重合反応終了後、30%水酸化ナトリウム水溶液を加えてpH6に調整すると共に、イオン交換水にて濃度を40%に調整して反応物の水性液を得た。この反応物をビニル共重合体(EX−1)とした。
イオン交換水206.5g、α−メタクリロイル−ω−メトキシ−ポリ(n=23)オキシエチレン151.7g、2−メタクリロイロキシエチルコハク酸23.3gとヒドロキシエチルアクリレート19.4g、3−メルカプトプロピオン酸2.3gを実施例1と同様の反応容器に仕込み、攪拌しながら雰囲気を窒素置換し、反応系の温度を温水浴にて70℃とした。3.0%過硫酸ナトリウム28.0g水溶液を加え反応を開始した。反応を開始してから3時間後、3.0%過硫酸ナトリウム6.8g水溶液を加え、3時間70℃を保持し、重合反応を終了した。その後、30%水酸化ナトリウム水溶液を加えてpH6に調整すると共に、イオン交換水にて濃度を40%に調整して反応物の水性液を得た。この反応物をビニル共重合体(EX−2)とした。
イオン交換水27.9g、α−(3−メチル−3−ブテニル)−ω−ヒドロキシ−ポリ(n=53)オキシエチレン173.0gを実施例1と同様の反応容器に仕込み、攪拌しながら均一に溶解した後、雰囲気を窒素置換し、反応系の温度を温水浴にて65℃とした。次に3.5%過酸化水素水10.8gを3時間かけて滴下すると共に、イオン交換水173.0gに2−アクリロイロキシエチルコハク酸43.2gを懸濁させた水溶液を3時間かけて滴下し、またイオン交換6.1gにL−アスコルビン酸0.9gと3−メルカプトプロピオン酸0.7gを溶解させた水溶液を4時間かけて滴下した。その後、2時間65℃を維持し、重合反応を終了した。重合反応終了後、30%水酸化ナトリウム水溶液を加えてpH6に調整すると共に、イオン交換水にて濃度を40%に調整して反応物の水性液を得た。この反応物をビニル共重合体(EX−3)とした。
イオン交換水36.4g、α−(3−メチル−3−ブテニル)−ω−ヒドロキシ−ポリ(n=53)オキシエチレン173.5gを実施例1と同様の反応容器に仕込み、攪拌しながら均一に溶解した後、雰囲気を窒素置換し、反応系の温度を温水浴にて65℃とした。次に4.0%過酸化水素水9.8gを3時間かけて滴下すると共にイオン交換水164.8gに2−アクリロイロキシエチルコハク酸15.2gとヒドロキシエチルアクリレート26.0gとアクリル酸2.2gを溶解させた水溶液を3時間かけて滴下し、またイオン交換7.8gにL−アスコルビン酸0.9gと3−メルカプトプロピオン酸1.1gを溶解させた水溶液を4時間かけて滴下した。その後、2時間65℃を維持し、重合反応を終了した。重合反応終了後、30%水酸化ナトリウム水溶液を加えてpH6に調整すると共に、イオン交換水にて濃度を40%に調整して反応物の水性液を得た。この反応物をビニル共重合体(EX−4)とした。
実施例1〜4の場合と同様にして、但し用いた単量体の種類や量等を表1記載のように変えて、ビニル共重合体(EX−5)〜(EX−9)を合成した。
イオン交換水242.8g、α−(3−メチル−3−ブテニル)−ω−ヒドロキシ−ポリ(n=53)オキシエチレン370.0g、アクリル酸0.7gを実施例1と同様の反応容器に仕込み、攪拌しながら均一に溶解した後、雰囲気を窒素置換し、反応系の温度を温水浴にて60℃とした。次に4.3%過硫酸ナトリウム水溶液48.8gを3.5時間かけて滴下すると共に、イオン交換水21.6gにアクリル酸18.7gを溶解させた水溶液を3時間かけて滴下し、またイオン交換46.7gにメルカプトエタノール0.7gを溶解させた水溶液を3.5時間かけて滴下した。その後、2時間60℃を維持し、重合反応を終了した。重合反応終了後、30%水酸化ナトリウム水溶液を加えてpH6に調整すると共に、イオン交換水にて濃度を40%に調整して反応物の水性液を得た。この反応物をビニル共重合体(CE−1)とした。
グルコン酸ナトリウムをイオン交換水にて濃度40%に調整した。
A−1:2−アクリロイロキシエチルコハク酸
A−2:2−メタクリロイロキシエチルコハク酸
A−3:2−アクリロイロキシエチルヘキサヒドロフタル酸
A−4:2−アクリロイロキシエチルフタル酸
A−5:ヒドロキシエチルアクリレートとトリメリット酸のモノエステル
A−6:ヒドロキシプロピルアクリレートとコハク酸のモノエステル
M−1:α−(3−メチル−3−ブテニル)−ω−ヒドロキシ−ポリ(n=53)オキシエチレン
M−2:α−メタクリロイル−ω−メトキシ−ポリ(n=23)オキシエチレン
M−3:α−メタクリロイル−ω−メトキシ−ポリ(n=45)オキシエチレン
M−4:α−メタリル−ω−ヒドロキシ−ポリ(n=113)オキシエチレン
M−5:α−メタクリロイル−ω−メトキシ−ポリ(n=9)オキシエチレン
M−6:ヒドロキシエチルアクリレート
M−7:アクリル酸メチル
M−8:ヒドロキシプロピルアクリレート
C−1:アクリル酸
C−2:メタクリル酸
・コンクリートの調製
55Lの強制二軸ミキサーに普通ポルトランドセメント(太平洋セメント社製、比重=3.16)、細骨材(大井川水系砂、比重=2.58)及び粗骨材(岡崎産砕石、比重=2.68)を順次投入して5秒間空練りした後、目標スランプが21±1.5cm及び空気量が4.5±0.5%の範囲となるよう、高性能AE減水剤(竹本油脂社製の商品名チューポールHP−11、以下HP−11という)を普通ポルトランドセメントに対し0.6〜0.8%、試験区分2で合成したビニル共重合体(EX−1)〜(EX−9)及び(CE−1)、(CE−2)の20%水溶液を普通ポルトランドセメントに対し0.1〜0.3%、AE剤(竹本油脂社製の商品名AE−300)を普通ポルトランドセメントに対し0.005%、消泡剤(竹本油脂社製の商品名AFK−2)を普通ポルトランドセメントに対し0.001%となるよう、練混ぜ水と共に投入し、90秒練混ぜた。かくして調製したコンクリートの単位量等を表2にまとめて示した。
練り混ぜ直後から30分間隔で、静置した各コンクリートのスランプフロー、空気量、24時間後の圧縮強度及びブリーディング率を次のように測定し、結果を表3にまとめて示した。
・空気量:練り混ぜ直後及び30分間隔で、静置した各コンクリートについて、JIS−A1128に準拠して測定した。
・圧縮強度:JIS−A1108に準拠し、供試体寸法を直径100mm×高さ200mmとし、材齢24時間で測定した。
・ブリーディング率:JIS−A1123に準拠して測定した。
HP−11の添加割合(%):HP−11の有り姿での普通ポルトランドセメントに対する質量%
ビニル共重合体の添加割合(%):試験区分2で合成したビニル共重合体等の20%水性液の普通ポルトランドセメントに対する質量%
Claims (9)
- 下記の化1で示される単量体Aと、下記の化2で示される単量体Bとから得られるビニル共重合体を含有し、水溶性ビニル共重合体を含む水硬性組成物用分散剤と併用されることを特徴とする水硬性組成物用分散保持剤。
R1,R2:水素原子、メチル基又は化3で示される有機基
p:0又は1
X:下記の化4で示される有機基
Y:下記の化5で示される有機基
M1:水素原子、アンモニウム基、有機アミン基、アルカリ金属又は1/2当量のアルカリ土類金属)
r:0又は1
M2:水素原子、アンモニウム基、有機アミン基、アルカリ金属又は1/2当量のアルカリ土類金属)
AO:炭素数2〜4のオキシアルキレン基
m:1〜10の整数
R3:ヘテロ原子を有する場合のあるアルキレン基、芳香環基又は不飽和炭化水素基)
s:0〜4の整数
t:0または1
AO:炭素数2〜4のオキシアルキレン基
n:0〜300の整数
R4:水素原子、炭素数1〜22のアルキル基又は炭素数1〜22の脂肪族アシル基(但し、n=0のときはR4は炭素数1〜22のアルキル基又は炭素数1〜22の脂肪族アシル基)) - 請求項1記載の単量体Aと、請求項1記載の単量体Bと、これらの単量体と共重合可能な他の単量体Cとから得られるビニル共重合体を含有することを特徴とする水硬性組成物用分散保持剤。
- 化4中のR3が、下記の化6で示される有機基である請求項1又は2記載の水硬性組成物用分散保持剤。
R5:ヘテロ原子を有する場合のある炭素数1〜22のアルキレン基、芳香環基又は不飽和炭化水素基
u:0〜2の整数
M3:水素原子、アンモニウム基、有機アミン基、アルカリ金属又は1/2当量のアルカリ土類金属) - 化6中のR5が、炭素数1〜6のアルキレン基、芳香環基又は不飽和炭化水素基である請求項1〜3のいずれか一つの項記載の水硬性組成物用分散保持剤。
- 単量体Aが、ヒドロキシエチル(メタ)アクリレートと2〜4塩基性カルボン酸無水物との縮合物である請求項1〜4のいずれか一つの項記載の水硬性組成物用分散保持剤。
- ビニル共重合体が、質量平均分子量8000〜200000のものである請求項1〜5のいずれか一つ記載の水硬性組成物用分散保持剤。
- ビニル共重合体が、全構成単位中に単量体A由来の構成単位を1〜99モル%及び単量体B由来の構成単位を1〜99モル%(合計100モル%)割合で有するものである請求項1〜6のいずれか一つの項記載の水硬性組成物用分散保持剤。
- 請求項1〜7のいずれか一項に記載の水硬性組成物用分散保持剤を、水溶性ビニル共重合体を含む水硬性組成物用分散剤と併用することを特徴とする水硬性組成物用分散保持剤の使用方法。
- 請求項1〜7のいずれか一項に記載の水硬性組成物用分散保持剤、及び水溶性ビニル共重合体を含む水硬性組成物用分散剤を、水硬性組成物に配合することを特徴とする水硬性組成物の調製方法。
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