JP2696303B2 - Dispersant and method for producing the same - Google Patents

Dispersant and method for producing the same

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Publication number
JP2696303B2
JP2696303B2 JP6058339A JP5833994A JP2696303B2 JP 2696303 B2 JP2696303 B2 JP 2696303B2 JP 6058339 A JP6058339 A JP 6058339A JP 5833994 A JP5833994 A JP 5833994A JP 2696303 B2 JP2696303 B2 JP 2696303B2
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JP
Japan
Prior art keywords
dispersant
acid
parts
mol
gypsum
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 - Fee Related
Application number
JP6058339A
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Japanese (ja)
Other versions
JPH07241450A (en
Inventor
嘉人 西盛
秀明 石徳
昌信 河村
奉文 中本
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Nippon Paper Industries Co Ltd
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Nippon Paper Industries Co Ltd
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Priority to JP6058339A priority Critical patent/JP2696303B2/en
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Publication of JP2696303B2 publication Critical patent/JP2696303B2/en
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  • Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Phenolic Resins Or Amino Resins (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は工業用の分散剤に関す
る。更に詳しくはセメント用の減水剤、石膏用、染料
用、無機及び有機顔料用、石炭微粉末スラリー用等の分
散剤に関するものである。
The present invention relates to an industrial dispersant. More particularly, the present invention relates to a water reducing agent for cement, a dispersant for gypsum, a dye, inorganic and organic pigments, a slurry of fine coal powder, and the like.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】従来か
ら分散剤はセメント、石膏、染料、無機及び有機顔料、
石炭微粉末スラリー等の広範な分野に多用されている。
例えば土木、建築等に大量に使用されているセメント組
成物には、その施行時に於ける作業性の改善、セメント
硬化物の強度や耐久性或いはひび割れ防止等の諸物性の
向上を目的として、セメント用減水剤が使用されてい
る。また石膏は石膏ボード、石膏プラスター等の建築材
料、陶磁器、鋳物等の型材等の分野に広く利用されてい
る。従来より石膏ボード等では、混合水量を低減して石
膏硬化時乾燥工程での乾燥エネルギーの低減、及び撹拌
混合時間や乾燥時間を短縮し、生産性を向上させるため
に分散剤が使用されている。
BACKGROUND OF THE INVENTION Conventionally, dispersants have been used for cement, gypsum, dyes, inorganic and organic pigments,
It is widely used in a wide range of fields such as coal fine powder slurry.
For example, cement compositions used in large quantities in civil engineering, construction, etc. include cement for the purpose of improving workability at the time of execution, and improving physical properties such as strength and durability of cured cement or prevention of cracking. Water reducing agent is used. Gypsum is widely used in the fields of building materials such as gypsum board and gypsum plaster, and shapes such as ceramics and castings. Conventionally, in a gypsum board or the like, a dispersant has been used to reduce the amount of mixed water to reduce the drying energy in the gypsum curing drying step, and reduce the stirring and mixing time and the drying time to improve productivity. .

【0003】先きにこれ等の分野の分散剤として、ビス
フェノール類とアミノベンゼンスルホン酸のホルムアル
デヒド縮合物を主成分とする分散剤が提案されている
(特開平3-187960)。しかしながらセメント用減水剤と
して用いた場合、セメント組成物の流動性が短時間で失
われ(スランプロス)、作業性が悪化するという欠点が
未だ克服されていなかった。また石膏用分散剤として用
いた場合も生産性の向上の面から水量の更なる削減が要
求されており、撹拌混合時間が短くとも更に優れた分散
性が要求されていた。
As a dispersant in these fields, a dispersant containing a formaldehyde condensate of bisphenols and aminobenzenesulfonic acid as a main component has been proposed (JP-A-3-187960). However, when used as a water reducing agent for cement, the drawback that the fluidity of the cement composition is lost in a short time (slump loss) and the workability deteriorates has not been overcome yet. Further, when used as a gypsum dispersant, further reduction in the amount of water is required from the viewpoint of improvement in productivity, and further excellent dispersibility is required even if the stirring and mixing time is short.

【0004】[0004]

【課題を解決するための手段】そこで本発明者等は、既
存の分散剤よりも優れた分散性を示す分散剤に就いて鋭
意検討した。その結果、ビスフェノール類と芳香族アミ
ノスルホン酸のホルムアルデヒド縮合物の分子内にアミ
ノ酸を導入することにより、ビスフエノール類・芳香族
アミノスルホン酸・ホルムアルデヒド縮合物では予想出
来なかった分散効果を示すことを見出だした。特に下記
A成分、B成分、C成分をA:B:C=1.0:0.6〜0.
9:0.05〜0.3の反応モル比で製造した縮合物が石膏用分
散剤として、A:B:C=1.0:1.0〜2.0:0.2〜1.5の
反応モル比で製造した縮合物がセメント用分散剤として
夫々好適であることを見出だし本発明に到達した。 A成分:一般式(I)で表されるビスフェノール類、
Accordingly, the present inventors have intensively studied a dispersant exhibiting better dispersibility than existing dispersants. As a result, by introducing amino acids into the molecules of the formaldehyde condensate of bisphenols and aromatic aminosulfonic acid, bisphenols, aromatic aminosulfonic acid and formaldehyde condensate show a dispersing effect that could not be expected. I found it. In particular, the following components A, B, and C are represented by A: B: C = 1.0: 0.6-0.
A condensate produced at a reaction molar ratio of 9: 0.05 to 0.3 is used as a dispersant for gypsum, and a condensate produced at a reaction molar ratio of A: B: C = 1.0: 1.0 to 2.0: 0.2 to 1.5 is used as a dispersant for cement. Were found to be suitable, respectively, and reached the present invention. A component: a bisphenol represented by the general formula (I),

【0005】[0005]

【化2】 Embedded image

【0006】B成分:アミノベンゼンスルホン酸 C成分:アミノ酸Component B: aminobenzenesulfonic acid Component C: amino acid

【0007】本発明で使用されているビスフェノール類
の具体例としては4,4’−ジヒドロキシジフェニルメ
タン、2,2−ビス(4−ヒドロキシフェニル)プロパ
ン、4,4’−ジヒドロキシジフェニルスルホン、4,
4−ビス(4−ヒドロキシフェニル)吉草酸、4,4−
ビス(4−ヒドロキシフェニル)酪酸及びこれ等の異性
体等が挙げられる。またこれ等は2種以上併用してもよ
い。またアミノベンゼンスルホン酸としては4−アミノ
ベンゼンスルホン酸及びその異性体の他、2−アミノ−
5−メチルベンゼンスルホン酸等のメチル基を有するも
の及びその異性体も使用可能である。
Specific examples of the bisphenols used in the present invention include 4,4'-dihydroxydiphenylmethane, 2,2-bis (4-hydroxyphenyl) propane, 4,4'-dihydroxydiphenylsulfone,
4-bis (4-hydroxyphenyl) valeric acid, 4,4-
Bis (4-hydroxyphenyl) butyric acid and isomers thereof are exemplified. These may be used in combination of two or more. Examples of the aminobenzenesulfonic acid include 4-aminobenzenesulfonic acid and its isomer, and 2-amino-sulfonic acid.
Those having a methyl group such as 5-methylbenzenesulfonic acid and isomers thereof can also be used.

【0008】またアミノ酸としては、グルタミン酸、グ
リシン、アラニン、イミノ二酢酸、アスパラギン酸、セ
リン、アミノ酪酸、グルタチオン、6−アミノヘキサン
酸、バリン、メチオニン、ロイシン等が使用可能である
が、グルタミン酸、グリシン、イミノ二酢酸が好まし
い。本発明で使用するホルムアルデヒド類としては、通
常ホルムアルデヒド水溶液(ホルマリン)を使用する
が、パラホルムアルデヒド等のホルムアルデヒド誘導体
を用いてもよい。またその使用割合は、ビスフェノール
類1モルに対するアミノベンゼンスルホン酸とアミノ酸
の合計のモル数が0.65〜3.5であることが望ましい。ま
たホルムアルデヒド類はビスフェノール類に対して1.2
〜5.0モル使用するのが好ましい。
As amino acids, glutamic acid, glycine, alanine, iminodiacetic acid, aspartic acid, serine, aminobutyric acid, glutathione, 6-aminohexanoic acid, valine, methionine, leucine and the like can be used. And iminodiacetic acid are preferred. As the formaldehyde used in the present invention, an aqueous formaldehyde solution (formalin) is usually used, but a formaldehyde derivative such as paraformaldehyde may be used. In addition, it is desirable that the total mole number of aminobenzenesulfonic acid and amino acid to 1 mole of bisphenol is 0.65 to 3.5. Formaldehydes are 1.2 to bisphenols.
It is preferred to use up to 5.0 moles.

【0009】本発明の製造法では反応時にアルカリを添
加することが必要である。用いるアルカリは水酸化ナト
リウム、水酸化カリウム、水酸化カルシウム、アンモニ
ア、及び水酸化アンモニウム等が使用可能であり、ビス
フェノール類に対して0.6〜4.0モル加えるのが望まし
い。上記ビスフェノール類1モルに対するアミノベンゼ
ンスルホン酸とアミノ酸の合計のモル数、ホルムアルデ
ヒド及びアルカリのモル数を外れると、分子量が分散剤
として好ましい範囲に含まれない。縮合物の重量平均分
子量は3000〜50000の範囲のものが望ましい。特に望ま
しくは7000〜30000で、その範囲以外のものは分散性や
分散安定性が低下する。尚、重量平均分子量はゲル・パ
ーミエイション・クロマトグラフィー(GPC)によっ
て容易に測定出来る。
In the production method of the present invention, it is necessary to add an alkali during the reaction. As the alkali to be used, sodium hydroxide, potassium hydroxide, calcium hydroxide, ammonia, ammonium hydroxide and the like can be used, and it is desirable to add 0.6 to 4.0 mol to the bisphenols. If the total number of moles of aminobenzenesulfonic acid and amino acid per 1 mole of the above bisphenols is out of the range of moles of formaldehyde and alkali, the molecular weight is not included in the preferred range as a dispersant. The weight average molecular weight of the condensate is desirably in the range of 3,000 to 50,000. Particularly desirable is 7000 to 30,000, and if it is out of the range, the dispersibility and dispersion stability decrease. The weight average molecular weight can be easily measured by gel permeation chromatography (GPC).

【0010】本発明の分散剤は、前記各成分を上記の割
合で水性条件下、常圧或いは加圧下30〜140℃の温度条
件で、2〜60時間反応させることにより、得ることが出
来る。また本発明の縮合物はアミノベンゼンスルホン酸
とアミノ酸の一方をビスフェノール類と同時に仕込んで
ホルムアルデヒド縮合させ、その後で他方をホルムアル
デヒド縮合させても得ることが出来る。本発明の分散剤
の固形分添加率は、石膏或いはセメントに対しては0.05
〜1.0重量%であることが望ましい。0.05重量%未満で
あると分散性が不充分であり、1.0重量%以上であると
石膏或いはセメント組成物が著しい凝結遅延を起こす場
合がある。
The dispersant of the present invention can be obtained by reacting each of the above components at the above ratio under aqueous conditions at normal pressure or under pressure at a temperature of 30 to 140 ° C. for 2 to 60 hours. The condensate of the present invention can also be obtained by charging one of aminobenzenesulfonic acid and an amino acid simultaneously with a bisphenol to formaldehyde condensate, and then subjecting the other to formaldehyde condensation. The solids content of the dispersant of the present invention is 0.05% for gypsum or cement.
It is desirably about 1.0% by weight. If it is less than 0.05% by weight, the dispersibility is insufficient, and if it is more than 1.0% by weight, the gypsum or cement composition may cause a significant retardation of setting.

【0011】[0011]

【実施例】以下、本発明を実施例に従って、更に詳述す
るが、本発明はこれによって限定されるものではない。
尚、配合量を示す「部」は重量部を示す。
EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.
In addition, "part" showing a compounding amount shows a weight part.

【0012】合成例1 撹拌装置、還流装置、温度計、ホルムアルデヒド滴下装
置の付いた反応容器に下記の物質を所定量仕込んだ。 (1) 2,2−ビス(4−ヒドロキシフェニル)プロパン 228.3部(1.0モル) (2) 4−アミノベンゼンスルホン酸 129.9部(0.75モル) (3) グルタミン酸 22.1部(0.15モル) (4) 水酸化ナトリウム 39.2部(0.98モル) (5) 水 876.4部 この固液に温度100℃にて37%ホルムアルデヒド水溶液2
02.7部(ホルムアルデヒド2.5モル)を1時間で滴下
し、更にその温度で20時間反応させて本発明の縮合物の
水溶液を得た。
Synthesis Example 1 The following substances were charged in predetermined amounts into a reaction vessel equipped with a stirring device, a reflux device, a thermometer, and a formaldehyde dropping device. (1) 2,2-bis (4-hydroxyphenyl) propane 228.3 parts (1.0 mol) (2) 4-aminobenzenesulfonic acid 129.9 parts (0.75 mol) (3) Glutamic acid 22.1 parts (0.15 mol) (4) Water Sodium oxide 39.2 parts (0.98 mol) (5) Water 876.4 parts 37% formaldehyde aqueous solution 2
02.7 parts (2.5 mol of formaldehyde) was added dropwise over 1 hour, and the mixture was further reacted at that temperature for 20 hours to obtain an aqueous solution of the condensate of the present invention.

【0013】合成例2 撹拌装置、還流装置、温度計、ホルムアルデヒド滴下装
置の付いた反応容器に下記の物質を所定量仕込んだ。 (1) 2,2−ビス(4−ヒドロキシフェニル)プロパン 228.3部(1.0モル) (2) 3−アミノベンゼンスルホン酸 155.9部(0.9モル) (3) 水酸化ナトリウム 40.0部(1.0モル) (4) 水 861.2部 この固液に温度90℃にて37%ホルムアルデヒド水溶液21
0.8部(2.6モル)を1時間で滴下し、更にその温度で15
時間反応させた。反応後の反応液にグルタミン酸44.1部
(0.3モル)、水酸化ナトリウム12.0部(0.3モル)を加
えた後、ホルムアルデヒド水溶液24.3部(0.3モル)を3
0分で滴下した。この反応液を90℃で5時間反応させて
縮合物の水溶液を得た。
Synthesis Example 2 The following substances were charged in predetermined amounts into a reaction vessel equipped with a stirrer, a reflux device, a thermometer, and a formaldehyde dropping device. (1) 2,2-bis (4-hydroxyphenyl) propane 228.3 parts (1.0 mol) (2) 3-aminobenzenesulfonic acid 155.9 parts (0.9 mol) (3) Sodium hydroxide 40.0 parts (1.0 mol) (4 861.2 parts of water This solid-liquid was added at 37 ° C to a 37%
0.8 part (2.6 mol) was added dropwise over 1 hour,
Allowed to react for hours. After adding 44.1 parts (0.3 mol) of glutamic acid and 12.0 parts (0.3 mol) of sodium hydroxide to the reaction solution after the reaction, 24.3 parts (0.3 mol) of an aqueous formaldehyde solution was added to 3 parts.
Dropped in 0 minutes. This reaction solution was reacted at 90 ° C. for 5 hours to obtain an aqueous solution of a condensate.

【0014】合成例3〜12 本発明のA成分、B成分、C成分を夫々表1,2に示し
た化合物に代え、そのモル比を表3のように代えた他
は、合成例1に全く同様にして夫々の縮合物の水溶液を
得た。尚合成例1〜5のモル比は石膏用分散剤に適した
モル比に含まれており、合成例6〜9はセメント用減水
剤に適したモル比に含まれている。
Synthesis Examples 3 to 12 Synthesis Example 1 was repeated except that the components A, B, and C of the present invention were replaced with the compounds shown in Tables 1 and 2, respectively, and the molar ratio was changed as shown in Table 3. An aqueous solution of each condensate was obtained in exactly the same manner. The molar ratios of Synthesis Examples 1 to 5 are included in a molar ratio suitable for a gypsum dispersant, and Synthesis Examples 6 to 9 are included in a molar ratio suitable for a water reducing agent for cement.

【0015】[0015]

【表1】 [Table 1]

【0016】[0016]

【表2】 [Table 2]

【0017】[0017]

【表3】 [Table 3]

【0018】合成例1〜12の方法で得られた縮合物の
重量平均分子量を表4に示した。
The weight average molecular weights of the condensates obtained by the methods of Synthesis Examples 1 to 12 are shown in Table 4.

【0019】[0019]

【表4】 [Table 4]

【0020】合成例13 特開平3−187960号公報に記載された実施例1に
従って反応容器に下記の物質を仕込んだ。 (1)2,2−ビス(4−ヒドロキシフェニル)プロパン 114.2部(0.5モル) (2)4−アミノベンゼンスルホン酸 173.2部(1.0モル) (3)水酸化ナトリウム 40.0部(1.0モル) (4)水 768.7部 この固液懸濁液に、温度90℃で37重量%ホルムアルデヒ
ド水溶液162.2部(2モル)を1時間で滴下し、更に同
様の温度で10時間反応させて縮合物の水溶液を得た。
Synthesis Example 13 The following substances were charged into a reaction vessel in accordance with Example 1 described in JP-A-3-187960. (1) 2,2-bis (4-hydroxyphenyl) propane 114.2 parts (0.5 mol) (2) 4-aminobenzenesulfonic acid 173.2 parts (1.0 mol) (3) Sodium hydroxide 40.0 parts (1.0 mol) (4 ) Water 768.7 parts To this solid-liquid suspension, 162.2 parts (2 mol) of a 37% by weight aqueous formaldehyde solution was added dropwise at 90 ° C over 1 hour, and further reacted at the same temperature for 10 hours to obtain an aqueous solution of a condensate. Was.

【0021】合成例14 撹拌装置、還流装置、温度計、ホルムアルデヒド滴下装
置の付いた反応容器に下記の物質を所定量仕込んだ。 (1)2,2−ビス(4−ヒドロキシフェニル)プロパン 274.0部(1.2モル) (2)4−アミノベンゼンスルホン酸 173.2部(1.0モル) (3)水酸化ナトリウム 44.0部(1.1モル) (4)水 1575.0部 この固液懸濁液に、温度60℃で37重量%ホルムアルデヒ
ド水溶液210.8部(2.6モル)を1時間で滴下した。更に
その温度で35時間反応させ、縮合物の水溶液を得た。
Synthesis Example 14 The following substances were charged in predetermined amounts into a reaction vessel equipped with a stirring device, a reflux device, a thermometer, and a formaldehyde dropping device. (1) 2,2-bis (4-hydroxyphenyl) propane 274.0 parts (1.2 mol) (2) 4-aminobenzenesulfonic acid 173.2 parts (1.0 mol) (3) Sodium hydroxide 44.0 parts (1.1 mol) (4 ) Water 1575.0 parts To this solid-liquid suspension, 210.8 parts (2.6 mol) of a 37% by weight aqueous formaldehyde solution were added dropwise at a temperature of 60 ° C over 1 hour. Further reaction was carried out at that temperature for 35 hours to obtain an aqueous solution of a condensate.

【0022】合成例15 特開平4−331751号公報に従い、撹拌装置、還流
装置、温度計、ホルムアルデヒド滴下装置の付いた反応
容器に下記の物質を所定量仕込んだ。 (1)4,4’−ジヒドロキシジフェニルメタン 200.3部(1.0モル) (2)グルタミン酸 147.1部(1.0モル) (3)水酸化ナトリウム 80.0部(2.0モル) (4)水 913.0部 この固液懸濁液に、温度80℃にて37重量%ホルムアルデ
ヒド水溶液202.5部(2.5モル)を1時間で滴下し、更に
その温度で5時間反応させて縮合物の水溶液を得た。
Synthesis Example 15 According to JP-A-4-331751, predetermined amounts of the following substances were charged into a reaction vessel equipped with a stirrer, a reflux device, a thermometer, and a formaldehyde dropping device. (1) 4,4'-dihydroxydiphenylmethane 200.3 parts (1.0 mol) (2) Glutamic acid 147.1 parts (1.0 mol) (3) Sodium hydroxide 80.0 parts (2.0 mol) (4) Water 913.0 parts This solid-liquid suspension Then, 202.5 parts (2.5 mol) of a 37% by weight aqueous solution of formaldehyde were added dropwise at 80 ° C. over 1 hour, and the mixture was further reacted at that temperature for 5 hours to obtain an aqueous solution of a condensate.

【0023】石膏試験 石膏(睦化学工業株式会社製の商品名:SK)1100部と
水620部をミキサーで15秒間撹拌し、内径50mm、高さ50m
mの中空の円柱容器に流し込んだ。容器を上方に引き抜
いた後、石膏スラリーの円状の広がりの直径(フロー
値)を2箇所測定し平均すると、100mmであった。次に
分散剤として、合成例1の縮合物水溶液を2.2部(石膏
に対して0.2重量%)添加し、同一石膏量で水量を変更
した他は上記方法と同様にして、100mmのフロー値を示
す水量を調べると、水量は475部であった。これより、
合成例1の縮合物水溶液を固形分換算で2.2部添加した
場合の減水量は以下の計算式より13.2%であった。
Gypsum test 1100 parts of gypsum (trade name: SK manufactured by Mutsumi Chemical Industry Co., Ltd.) and 620 parts of water were stirred for 15 seconds with a mixer, and the inner diameter was 50 mm and the height was 50 m.
m into a hollow cylindrical container. After the container was pulled out upward, the diameter (flow value) of the circular spread of the gypsum slurry was measured at two places and averaged to be 100 mm. Next, as a dispersant, 2.2 parts (0.2% by weight based on gypsum) of the aqueous solution of the condensate of Synthesis Example 1 was added, and a flow value of 100 mm was obtained in the same manner as above except that the amount of water was changed with the same amount of gypsum. The amount of water indicated was 475 parts. Than this,
The water loss when adding 2.2 parts of the aqueous solution of the condensate of Synthesis Example 1 in terms of solid content was 13.2% from the following formula.

【0024】 [0024]

【0025】石膏の凝結時間はJIS R 9112に準拠して測
定し、石膏硬化物が最高温度に達した時間を硬化時間と
した。合成例2〜5,10〜12に就いても同様の方法
で減水率と硬化時間を求めた。また比較例として、合成
例14及び汎用分散剤であるナフタレンスルホン酸ホル
ムアルデヒド縮合物(花王株式会社製,商品名:マイテ
ィ150、以下NSFと略す。)を用いて同様の方法で減
水率と硬化時間を求めた。測定結果を表5に示す。
The setting time of the gypsum was measured according to JIS R 9112, and the time when the gypsum cured product reached the maximum temperature was defined as the curing time. For Synthesis Examples 2 to 5, 10 to 12, the water reduction rate and the curing time were determined in the same manner. As a comparative example, the water reduction rate and the curing time were obtained in the same manner using Synthetic Example 14 and naphthalenesulfonic acid formaldehyde condensate (manufactured by Kao Corporation, trade name: Mighty 150, hereinafter abbreviated as NSF) which is a general-purpose dispersant. I asked. Table 5 shows the measurement results.

【0026】[0026]

【表5】 [Table 5]

【0027】コンクリート試験 本発明の分散剤を添加したコンクリートのスランプロス
(流動性の経時変化)を合成例6〜12を合成例13,
15及びNSFと比較した。尚コンクリートの配合を表
6に示す。コンクリートは、セメント,骨剤,及び減水
剤を含む水を100リットル可搬傾胴式ミキサーにて3分
間混練し、直後,60,120分後のスランプ、及び空気量
を測定した。コンクリートのスランプ,及び空気量はJI
S A 6204に準拠して行った。
Concrete Test The slump loss (fluctuation in fluidity with time) of concrete to which the dispersant of the present invention was added was evaluated by using Synthesis Examples 6 to 12 as Synthesis Examples 13 and
15 and NSF. Table 6 shows the composition of the concrete. For the concrete, water containing cement, aggregate, and a water reducing agent was kneaded with a 100-liter portable tilting mixer for 3 minutes, and immediately after, 60 and 120 minutes later, the slump and the amount of air were measured. Concrete slump and air volume are JI
Performed according to SA 6204.

【0028】[0028]

【表6】 1) C セメント:普通ポルトランドセメント W 水 :水道水 S 細骨材 :島根産川砂 比重2.59 粗粒率2.60 G 粗骨材 :山口産砕石 比重2.71 粗粒率6.86[Table 6] 1) C cement: ordinary Portland cement W water: tap water S fine aggregate: river sand from Shimane specific gravity 2.59 coarse grain ratio 2.60 G coarse aggregate: crushed stone from Yamaguchi specific gravity 2.71 coarse grain ratio 6.86

【0029】測定結果を表7に示す。Table 7 shows the measurement results.

【0030】[0030]

【表7】 1) 固形分添加率(対セメント重量) 2) 直後の空気量は市販の界面活性剤サンフローAE−
4にて調整した。
[Table 7] 1) Addition rate of solid content (to weight of cement) 2) Immediately after the amount of air is commercially available surfactant Sunflow AE-
Adjusted at 4.

【0031】本発明の分散剤は、比較例の縮合物よりも
石膏試験の結果では減水率が大きく、コンクリート試験
では少ない添加量で同程度のスランプを得ることが出来
る。これは本発明の分散剤が分散性に優れていることを
示している。またスランプの経時変化から、本発明の分
散剤(減水剤)は流動性の経時的変化が極めて少ないこ
とを示している。また石膏の凝結試験の結果から、見掛
けの硬化時間は従来の分散剤と殆ど変化が無いことを示
している。これ等の結果より、本発明の分散剤が優れた
結果を有することは明らかである。
The dispersant of the present invention has a greater water reduction rate in the gypsum test than the condensate of the comparative example, and a similar amount of slump can be obtained with a small amount of addition in the concrete test. This indicates that the dispersant of the present invention is excellent in dispersibility. Further, the change with time of the slump shows that the dispersant (water reducing agent) of the present invention has very little change with time in fluidity. The results of the setting test of gypsum show that the apparent curing time is almost the same as that of the conventional dispersant. From these results, it is clear that the dispersant of the present invention has excellent results.

【0032】[0032]

【発明の効果】本発明の分散剤は、従来の分散剤と比較
し、分散性にも分散安定性にも優れているため、セメン
ト用の減水剤、石膏用分散剤のみならず、染料用、無機
及び有機顔料用、石炭微粉末スラリー用等の分散剤とし
て優れた性能を示す。
The dispersant of the present invention has excellent dispersibility and dispersion stability as compared with conventional dispersants, so that it can be used not only for water reducing agents for cement and dispersants for gypsum but also for dyes. It has excellent performance as a dispersant for inorganic and organic pigments, for coal fine powder slurries, and the like.

フロントページの続き (72)発明者 中本 奉文 山口県岩国市飯田町2−8−1 日本製 紙株式会社生産技術研究所内 (56)参考文献 特開 平3−187960(JP,A) 特開 平4−331751(JP,A)Continuation of the front page (72) Inventor Fumifumi Nakamoto 2-8-1 Iida-cho, Iwakuni-shi, Yamaguchi Prefecture Nippon Paper Industries Co., Ltd. Production Technology Laboratory (56) References JP-A-3-187960 (JP, A) JP-A-3-187960 Hei 4-331751 (JP, A)

Claims (6)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 ビスフェノール類、アミノベンゼンスル
ホン酸、及びアミノ酸のホルムアルデヒド縮合物を含有
することを特徴とする分散剤。
1. A dispersant comprising a bisphenol, an aminobenzenesulfonic acid, and a formaldehyde condensate of an amino acid.
【請求項2】 水性条件下で、下記A成分、B成分、C
成分をA:B:C=1.0:0.6〜0.9:0.05〜0.3のモル比
でホルムアルデヒド縮合させて得られる生成物を含有す
ることを特徴とする石膏用分散剤; A成分:一般式(I)で表されるビスフェノール類、 【化1】 B成分:アミノベンゼンスルホン酸 C成分:アミノ酸
2. Under aqueous conditions, the following components A, B and C
A gypsum dispersant comprising a product obtained by subjecting components to formaldehyde condensation at a molar ratio of A: B: C = 1.0: 0.6 to 0.9: 0.05 to 0.3; A component: general formula (I) Bisphenols represented by the following: Component B: aminobenzenesulfonic acid Component C: amino acid
【請求項3】 水性条件下で、請求項2に記載のA成
分、B成分、C成分をA:B:C=1.0:1.0〜2.0:0.2
〜1.5のモル比でホルムアルデヒド縮合させて得られた
生成物を分散剤として含有することを特徴とするセメン
ト用減水剤。
3. The composition according to claim 2, wherein A: B: C = 1.0: 1.0 to 2.0: 0.2 under aqueous conditions.
A water reducing agent for cement, comprising as a dispersant a product obtained by formaldehyde condensation at a molar ratio of up to 1.5.
【請求項4】 水性条件下で、請求項2に記載のA成
分、B成分、C成分とアルカリ、アルデヒド類とを1.
0:0.6〜2.0:0.05〜1.5:0.6〜4.0:1.2〜5.0のモル比
で反応させて新規な縮合物を得る製造法。
4. Under an aqueous condition, the components A, B, and C according to claim 2 and an alkali and an aldehyde are combined with 1.
A production method in which a novel condensate is obtained by reacting at a molar ratio of 0: 0.6 to 2.0: 0.05 to 1.5: 0.6 to 4.0: 1.2 to 5.0.
【請求項5】 C成分として、グルタミン酸、グリシ
ン、イミノ二酢酸の何れかを用いることを特徴とする請
求項2または3中の何れか1項に記載の分散剤。
5. The dispersant according to claim 2, wherein any one of glutamic acid, glycine, and iminodiacetic acid is used as the component C.
【請求項6】 C成分として、グルタミン酸、グリシ
ン、イミノ二酢酸の何れかを用いることを特徴とする請
求項4に記載の分散剤の製造法。
6. The method for producing a dispersant according to claim 4, wherein any one of glutamic acid, glycine, and iminodiacetic acid is used as the component C.
JP6058339A 1994-03-04 1994-03-04 Dispersant and method for producing the same Expired - Fee Related JP2696303B2 (en)

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JP2696303B2 true JP2696303B2 (en) 1998-01-14

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* Cited by examiner, † Cited by third party
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