JP2622965B2 - Papermaking additives - Google Patents
Papermaking additivesInfo
- Publication number
- JP2622965B2 JP2622965B2 JP62047078A JP4707887A JP2622965B2 JP 2622965 B2 JP2622965 B2 JP 2622965B2 JP 62047078 A JP62047078 A JP 62047078A JP 4707887 A JP4707887 A JP 4707887A JP 2622965 B2 JP2622965 B2 JP 2622965B2
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- JP
- Japan
- Prior art keywords
- starch
- paper
- acrylamide
- meth
- aqueous solution
- 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.)
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Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、製紙用添加剤に関し、特に硫酸バンドの使
用の有無に拘らず高い紙力増強効果を有する新規な製紙
用添加剤に関する。Description: TECHNICAL FIELD The present invention relates to a papermaking additive, and more particularly to a novel papermaking additive having a high paper strength enhancing effect regardless of the use of a sulfate band.
［従来の技術］ 従来、製紙工程に於いては、紙質を改善する目的で各
種の製紙用添加剤が使用されて来た。[Prior Art] Conventionally, in the papermaking process, various papermaking additives have been used for the purpose of improving paper quality.
澱粉系添加剤は、安価であるものの紙力増強効果が低
いため多量に添加する必要があり、抄紙工程での濾水性
の低下、スライムの発生、それらに伴う抄紙機の汚れ等
の外に使用直前に蒸煮溶解する必要があるなど、作業性
に欠点を有するため、最近は合成ポリマー系添加剤の使
用が主流となっている。Although starch-based additives are inexpensive, they must be added in large amounts because of their low paper-strengthening effect.They are used in addition to reducing drainage in the papermaking process, generating slime, and contaminating the paper machine. There is a drawback in workability such as the necessity of steaming and dissolving immediately before, and the use of synthetic polymer additives has recently become mainstream.
合成ポリマー系添加剤の代表的なものはポリアクリル
アミドであり、通常アニオン性、カチオン性或いは両性
に変性された各種のポリアクリルアミド系添加剤が使用
されている。ポリアクリルアミド系添加剤は優れた紙力
増強効果を有する反面、高価であるためその使用には経
済的制約がある。A typical synthetic polymer additive is polyacrylamide, and various anionic, cationic or amphoteric modified polyacrylamide additives are generally used. Although polyacrylamide-based additives have an excellent paper strength-enhancing effect, they are expensive and therefore have economical restrictions on their use.
近年、ポリアクリルアミド系添加剤の欠点を改良し、
アルキルケテンダイマー系サイズ剤のサイズ効果を低下
しない中性抄紙用の紙力増強剤が提案され（特開昭58−
41998号）、この紙力増強剤は、水溶性多糖類を溶存す
る水溶液中で、特定の重合性ビニル単量体混合物を重合
して得られるものである。In recent years, we have improved the disadvantages of polyacrylamide-based additives,
A paper strength enhancer for neutral papermaking that does not reduce the size effect of the alkyl ketene dimer sizing agent has been proposed (Japanese Patent Application Laid-Open No.
No. 41998), this paper strength enhancer is obtained by polymerizing a specific polymerizable vinyl monomer mixture in an aqueous solution in which a water-soluble polysaccharide is dissolved.
またポリアクリルアミド系紙力増強剤に代る陽イオン
性グラフト澱粉共重合体から成る乾燥強度向上用の紙力
増強剤の提案（特開昭61−211319号）がある。There is also proposed a paper strength enhancer comprising a cationic graft starch copolymer instead of a polyacrylamide-based paper strength enhancer for improving dry strength (Japanese Patent Application Laid-Open No. 61-213319).
［発明が解決しようとする問題点］ 上記提案の紙力増強剤は何れも硫酸バンドを使用しな
い中性抄紙工程に適用され、それぞれの目的に応じた効
果を有するものであるが、本発明者等の追試によれば特
開昭58−41998号に記載される紙力増強剤は、紙力増強
効果が不満足であり、一方特開昭61−211319号に記載さ
れる紙力増強剤は、硫酸バンドが併用添加される場合の
紙力増強効果が不充分であるという問題点を有するもの
である。[Problems to be Solved by the Invention] Each of the above-mentioned paper strength enhancers is applied to a neutral papermaking process using no sulfate band, and has an effect according to each purpose. According to additional tests, etc., the paper strength enhancer described in JP-A-58-41998 is unsatisfactory in the paper strength-enhancing effect, while the paper strength enhancer described in JP-A-61-211319 is There is a problem that the paper strength enhancing effect when a sulfuric acid band is added in combination is insufficient.
本発明は上記問題点を解消し、硫酸バンドの使用の有
無に拘らず、優れた紙力増強効果を発揮し得る新規な製
紙用添加剤を提供するものである。The present invention solves the above problems and provides a novel papermaking additive capable of exhibiting an excellent paper strength enhancing effect irrespective of the use of a sulfate band.
［問題点を解決するための手段］ 本発明者等は、上記問題点を解決するため鋭意研究の
結果、澱粉及び／又は変性澱粉の存在下に、特定のビニ
ル系単量体混合物を共重合せしめて得られる水性分散液
ないし水溶液が、格別に優れた紙力増強効果を有し、且
つその効果が硫酸バンドの使用の有無に拘らず安定して
発現されることを発見し、本発明を完成するに到ったも
のである。[Means for Solving the Problems] As a result of intensive studies to solve the above problems, the present inventors have found that a specific vinyl monomer mixture is copolymerized in the presence of starch and / or modified starch. It has been found that the aqueous dispersion or aqueous solution obtained at least has an exceptionally excellent paper strength enhancing effect, and that the effect is stably exhibited regardless of the use of the sulfate band. It has been completed.
即ち、本発明の製紙用添加剤は、 （Ａ）澱粉及び／又は変性澱粉25〜60重量％に対して、 （Ｂ）．カチオン性単量体であるジアルキルアミノア
ルキル（メタ）アクリルアミド ……２〜25モル％、 ．アニオン性単量体である（メタ）アクリル酸 ……２〜40モル％、 ．非イオン性単量体である（メタ）アクリルアミド ……35〜96モル％、 の単量体成分のみから成る単量体混合物40〜75重量％、 をグラフト共重合して得られるものから成ることを特徴
とするものである。That is, the papermaking additive of the present invention comprises: (A) 25 to 60% by weight of starch and / or modified starch; Dialkylaminoalkyl (meth) acrylamide which is a cationic monomer: 2 to 25 mol%; (Meth) acrylic acid which is an anionic monomer: 2 to 40 mol%; (Meth) acrylamide which is a nonionic monomer: 35 to 96 mol%, 40 to 75% by weight of a monomer mixture consisting of only a monomer component, which is obtained by graft copolymerization of It is characterized by the following.
本発明に使用される澱粉及び／又は変性澱粉の具体例
としては、小麦、米、トウモロコシ、馬鈴薯、甘薯、タ
ピオカ等を原料とする各種の澱粉、及びそれらの変性物
例えば、陽イオン性澱粉、エーテル化澱粉、酸化澱粉、
酵素変性澱粉等を挙げることができ、それらの一種或い
は二種以上を使用することができる。特に陽イオン性澱
粉及び／又は酸化澱粉の使用が好ましい。Specific examples of the starch and / or modified starch used in the present invention include various starches made from wheat, rice, corn, potato, sweet potato, tapioca and the like, and modified products thereof, for example, cationic starch, Etherified starch, oxidized starch,
Enzyme-modified starch and the like can be mentioned, and one or more of them can be used. In particular, the use of cationic starch and / or oxidized starch is preferred.
本発明に使用される（Ｂ）の単量体混合物の一成分で
あるジアルキルアミノアルキル（メタ）アクリルアミ
ドの具体例としては、ジメチルアミノエチル（メタ）ア
クリルアミド，ジメチルアミノプロピル（メタ）アクリ
ルアミド，ジエチルアミノエチル（メタ）アクリルアミ
ド，ジエチルアミノプロピル（メタ）アクリルアミド及
びそれらの酸塩或いは第４級アンモニウム塩等が例示で
き、それらの一種或いは二種以上を使用することができ
る。特にジメチルアミノプロピル（メタ）アクリルアミ
ド及びその酸塩の使用が好ましい。Specific examples of dialkylaminoalkyl (meth) acrylamide which is one component of the monomer mixture of (B) used in the present invention include dimethylaminoethyl (meth) acrylamide, dimethylaminopropyl (meth) acrylamide, diethylaminoethyl Examples thereof include (meth) acrylamide, diethylaminopropyl (meth) acrylamide and their acid salts or quaternary ammonium salts, and one or more of them can be used. Particularly, use of dimethylaminopropyl (meth) acrylamide and an acid salt thereof is preferable.
本発明の製紙用添加剤は、上記澱粉及び／又は変性澱
粉25〜60重量％を水中に分散せしめた後、加熱溶解して
得られる澱粉類水溶液中に、前記組成より成る単量体混
合物40〜75重量％を添加し、充分に撹拌混合した後、常
法に従って重合開始剤を加えて重合せしめることにより
得られるものである。かかる重合開始剤の具体例として
は、過酸化水素，過硫酸カリ，過硫酸アンモニウム，ア
ルキルハイドロパーオキサイド等の過酸化物，これらと
還元剤との組合せから成る任意のレドックス開始剤系及
び2,2′アゾビス（アミジノプロパン）塩酸塩のような
水溶性アゾ系開始剤等を挙げることができる。The papermaking additive of the present invention is obtained by dispersing 25 to 60% by weight of the above-mentioned starch and / or modified starch in water and then heating and dissolving the resulting mixture in a starch aqueous solution obtained from the monomer mixture 40 having the above composition. After adding -75% by weight and thoroughly stirring and mixing, the mixture is obtained by adding a polymerization initiator and polymerizing according to a conventional method. Specific examples of such a polymerization initiator include peroxides such as hydrogen peroxide, potassium persulfate, ammonium persulfate, and alkyl hydroperoxide; any redox initiator system comprising a combination of these with a reducing agent; 'Azobis (amidinopropane) hydrochloride such as a water-soluble azo initiator.
上記に於ける（Ａ）澱粉及び／又は変性澱粉の使用量
が60重量％を越える場合及びそれに対応して（Ｂ）単量
体混合物の使用量が40重量％未満である場合には、安定
な製紙用添加剤を得ることが難しく、又紙力増強効果が
不充分となる。一方、澱粉及び／又は変性澱粉の使用量
が25重量％未満である場合及びそれに対応して（Ｂ）単
量体混合物の使用量が75重量％を越える場合には、添加
剤が高価なものとなり、工業的使用に際し経済的制約を
免れることができない。When (A) the amount of the starch and / or modified starch used exceeds 60% by weight and correspondingly (B) the amount of the monomer mixture is less than 40% by weight, it is stable. It is difficult to obtain a suitable papermaking additive, and the effect of enhancing paper strength becomes insufficient. On the other hand, when the amount of the starch and / or modified starch is less than 25% by weight and correspondingly the amount of the monomer mixture (B) exceeds 75% by weight, the additive is expensive. Thus, economic restrictions cannot be avoided in industrial use.
一方、前記（Ｂ）単量体混合物の各組成に於いてジ
アルキルアミノアルキル（メタ）アクリルアミドの使用
量が２モル％未満の場合には、紙力増強効果が不充分と
なり、また25モル％を越える場合には経済的に不利であ
るに加えて、製紙用添加剤の経時安定性が劣るという不
都合を生じる。一方、（メタ）アクリル酸の使用量が
２モル％未満である場合は、紙力増強効果が不充分で且
つ経時安定性が劣り、また40モル％を越える場合には、
紙力増強効果が不充分となる。On the other hand, when the amount of the dialkylaminoalkyl (meth) acrylamide used is less than 2 mol% in each composition of the monomer mixture (B), the paper strength enhancing effect becomes insufficient, and 25 mol% If the amount exceeds the above range, it is economically disadvantageous, and in addition, the stability of the papermaking additive over time is deteriorated. On the other hand, when the amount of (meth) acrylic acid is less than 2 mol%, the effect of enhancing paper strength is insufficient and the stability over time is poor, and when it exceeds 40 mol%,
The paper strength enhancing effect becomes insufficient.
以上の通りの本発明の製紙用添加剤は、透明乃至半透
明或いは乳液状の外観を呈する安定な水溶液或いは水性
分散液であり、これを製紙工程に適用する場合は、適
宜、所望の濃度に稀釈してパルプスラリーに添加し、或
いは紙匹形成後の湿潤紙層又は乾燥紙の表面に塗布する
ことにより行うことができ、何れの場合にも充分な紙力
増強効果を発現し得るものである。The papermaking additive of the present invention as described above is a stable aqueous solution or aqueous dispersion having a transparent to translucent or milky appearance, and when it is applied to the papermaking process, it may be appropriately adjusted to a desired concentration. It can be diluted and added to the pulp slurry, or applied to the surface of a wet paper layer or dried paper after forming a paper web, and in any case, a sufficient paper strength enhancing effect can be exhibited. is there.
［作用］ 本発明の製紙用添加剤は澱粉及び／又は変性澱粉と特
定の単量体組成を有する両性重合体との複合体であり、
後段の実施例の記載からも明らかな様に、格別に優れた
紙力増強効果を有するものであるが、その作用機構につ
いては、本発明者等にあっても未だ充分に解明されてい
ない。[Action] The papermaking additive of the present invention is a complex of starch and / or modified starch and an amphoteric polymer having a specific monomer composition,
As is clear from the description of the examples below, it has a particularly excellent paper strength enhancing effect, but its mechanism of action has not yet been fully elucidated even by the present inventors.
しかしながら、上記両性重合体の単量体組成に基づく
ジアルキルアミノアルキル（メタ）アクリルアミドの
陽イオン性基と（メタ）アクリル酸の陰イオン性基と
のバランスによって、本発明の製紙用添加剤がパルプ繊
維に対する高い吸着性と接着強度、硫酸バンドとの反応
性を有することによるものと推定される。However, due to the balance between the cationic group of dialkylaminoalkyl (meth) acrylamide and the anionic group of (meth) acrylic acid based on the monomer composition of the amphoteric polymer, the papermaking additive of the present invention is This is presumed to be due to the high adsorptivity to the fiber, the adhesive strength, and the reactivity with the sulfate band.
［実施例］ 以下本発明につき、実施例、比較例に基づき具体的に
説明する。[Examples] Hereinafter, the present invention will be specifically described based on examples and comparative examples.
〈実施例１〉 90〜100℃でクッキングした10％濃度の市販の陽イオ
ン性澱粉（AMYLOFAX15 AVEBE社製）水溶液100g,40％濃
度のアクリルアミド水溶液41.3g,ジメチルアミノプロピ
ルアクリルアミド5.4g,アクリル酸1.7g,水70gの混合物
を10％硫酸溶液を用いてPH4.0に調整する。次に温度50
℃で２％過硫酸アンモニウム（APS）水溶液1cc,2％重亜
硫酸ソーダ（SBS）水溶液1ccを添加して温度60〜70℃で
３時間反応させ表１に示す重合体組成物よりなる本発明
の製紙用添加剤を得た。<Example 1> 100 g of a 10% concentration aqueous solution of a commercially available cationic starch (manufactured by AMYLOFAX15 AVEBE) cooked at 90 to 100 ° C, 41.3 g of a 40% concentration acrylamide aqueous solution, 5.4 g of dimethylaminopropylacrylamide, and acrylic acid 1.7 g and 70 g of water are adjusted to pH 4.0 using a 10% sulfuric acid solution. Then temperature 50
1 cc of a 2% aqueous solution of ammonium persulfate (APS) and 1 cc of a 2% aqueous solution of sodium bisulfite (SBS) were added at a temperature of 60 ° C., and the mixture was reacted at a temperature of 60 to 70 ° C. for 3 hours. Additive was obtained.
〈実施例２〉 10％陽イオン性澱粉（AMYLOFAX15）水溶液150g,40％
アクリルアミド水溶液46.2g,ジメチルアミノプロピルア
クリルアミド3.61g,アクリル酸0.42g,水40g,2％APS水溶
液0.8cc,2％SBS水溶液0.8ccを用いて、その他は実施例
１同様にして重合を行い、表１に示す重合体組成物より
成る本発明の製紙用添加剤を得た。<Example 2> 150 g of a 10% cationic starch (AMYLOFAX15) aqueous solution, 40%
Using 46.2 g of an aqueous acrylamide solution, 3.61 g of dimethylaminopropylacrylamide, 0.42 g of acrylic acid, 40 g of water, 0.8 cc of a 2% aqueous solution of APS, and 0.8 cc of a 2% aqueous solution of SBS, polymerization was carried out in the same manner as in Example 1 except for the following. An additive for papermaking of the present invention comprising the polymer composition shown in No. 1 was obtained.
〈実施例３〉 90〜100℃でクッキングした10％濃度の酸化澱粉（ア
ミコート＃800,松谷化学製）水溶液74g,40％アクリルア
ミド水溶液45.6g,ジメチルアミノプロピルアクリルアミ
ド3.57g,アクリル酸0.41g,水62g,2％APS水溶液1cc,2％S
BS水溶液1ccを用いて、その他は実施例１と同様にして
重合を行い表１に示す重合体組成物より成る本発明の製
紙用添加剤を得た。<Example 3> 74 g of an aqueous solution of oxidized starch (Amicoat # 800, manufactured by Matsutani Chemical) having a concentration of 10% cooked at 90 to 100 ° C, 45.6 g of an aqueous solution of 40% acrylamide, 3.57 g of dimethylaminopropylacrylamide, 0.41 g of acrylic acid, and water 62g, 2cc APS aqueous solution 1cc, 2% S
Polymerization was carried out in the same manner as in Example 1 except for using 1 cc of the BS aqueous solution to obtain a papermaking additive of the present invention comprising the polymer composition shown in Table 1.
〈比較例Ｉ〉 10％濃度陽イオン性澱粉（AMYLOFAX15）水溶液100g,4
0％アクリルアミド水溶液41.3g,ジメチルアミノエチル
メタクリレート5.4g,アクリル酸1.7g,水66gの混合物を1
0％硫酸溶液を用いてPH4.0に調整する。次に温度50℃で
２％APS水溶液1.4cc,2％SBS水溶液1.4ccを添加して温度
60〜70℃で３時間反応して表１に示す重合体組成物を得
た。<Comparative Example I> 100 g of a 10% aqueous solution of cationic starch (AMYLOFAX15)
A mixture of 41.3 g of a 0% acrylamide aqueous solution, 5.4 g of dimethylaminoethyl methacrylate, 1.7 g of acrylic acid, and 66 g of water is mixed with 1
Adjust to pH 4.0 with 0% sulfuric acid solution. Next, at a temperature of 50 ° C., 1.4 cc of a 2% aqueous solution of APS and 1.4 cc of a 2% aqueous solution of SBS were added and the temperature was increased
The reaction was carried out at 60 to 70 ° C. for 3 hours to obtain a polymer composition shown in Table 1.
〈比較例II〉 10％陽イオン性澱粉（AMYLOFAX15）水溶液100g,40％
アクリルアミド水溶液47.5g,ジメチルアミノエチルメタ
クリレート4.6g,水64g,2％APS水溶液1.2cc,2％SBS水溶
液1.2ccを用いて、その他は比較例１と同様にして表１
に示す重合体組成物を得た。<Comparative Example II> 10% cationic starch (AMYLOFAX15) aqueous solution 100g, 40%
Aqueous acrylamide solution 47.5 g, dimethylaminoethyl methacrylate 4.6 g, water 64 g, 2% APS aqueous solution 1.2 cc, 2% SBS aqueous solution 1.2 cc.
Was obtained.
〈比較例III〉 10％陽イオン性澱粉（AMYLOFAX15）水溶液100g,40％
アクリルアミド水溶液47.5g,ジメチルアミノプロピルア
クリルアミド4.2g,水73g,2％APS水溶液0.8cc,2％SBS水
溶液0.8ccを用いて、その他は比較例１と同様にして表
１に示す重合体組成物を得た。<Comparative Example III> 10% cationic starch (AMYLOFAX15) aqueous solution 100g, 40%
Using a 47.5 g aqueous acrylamide solution, 4.2 g dimethylaminopropyl acrylamide, 73 g water, 0.8 cc 2% APS aqueous solution and 0.8 cc 2% SBS aqueous solution, the same procedure as in Comparative Example 1 was repeated except that the polymer composition shown in Table 1 was used. Obtained.
〈試験例〉 実施例１〜３で得た本発明の製紙用添加剤及び比較例
Ｉ〜IIIで調製した重合体組成物を紙力剤として使用し
その紙力効果の試験を行った。 <Test Example> Using the papermaking additive of the present invention obtained in Examples 1 to 3 and the polymer compositions prepared in Comparative Examples I to III as a paper strength agent, a test of the paper strength effect was performed.
〈手抄試験〉 パルプＬ−BKP（CSF 400cc）を用いて、エスカロン＃
800（重カル）10重量％，紙力剤0.3重量％，ハーコンＷ
（市販アルキルケテンダイマー系サイズ剤 デイックハ
ーキュレス社製）0.15重量％を添加してタッピスタンダ
ードシートマシンにより、坪量80g/m2相当の紙を抄き、
3.5Kg/cm2×５分間プレスし、105℃×２分間乾燥した。
得られた成紙について、IGT（紙の表面強度。なお、前
記特性は、印刷速度が増加するにしたがい、印刷インキ
によって紙の表面に働く力が増加し、ついには紙むけが
生じるが、その紙のむけ抵抗を示すものである。）、比
破裂強度、内部強度（I.B）を測定した。結果を表２に
示す。<Hand paper test> Escalon # using pulp L-BKP (CSF 400cc)
800 (heavy cal) 10% by weight, paper strength agent 0.3% by weight, Harcon W
(Commercially available alkyl ketene dimer sizing agent, Dick Hercules Co., Ltd.) 0.15% by weight was added, and a paper equivalent to a basis weight of 80 g / m 2 was made with a Tappi standard sheet machine.
It was pressed at 3.5 kg / cm 2 × 5 minutes and dried at 105 ° C. × 2 minutes.
Regarding the obtained paper, IGT (paper surface strength. In addition, the above-mentioned characteristics show that as the printing speed increases, the force acting on the paper surface by the printing ink increases, and finally paper peeling occurs. It indicates the resistance to peeling of paper.), Specific burst strength, and internal strength (IB). Table 2 shows the results.
〈手抄試験〉 パルプＬ−BKP（CSF 400cc）を用いて、硫酸バンド1.
5重量％（PH4.5）紙力剤0.3重量％を添加して、タッピ
スタンダードシートマシンにより坪量60g/m2相当の紙に
抄き、3.5Kg/cm2×５分間プレスし、105℃×２分間乾燥
した。得られた成紙について裂断長、比破裂強度を測定
した。結果を表３に示す。<Hand paper test> Using pulp L-BKP (CSF 400cc), sulfate band 1.
5 wt% (pH 4.5) was added to a paper strength agent 0.3% by weight, the paper making the basis weight of 60 g / m 2 corresponds paper by touch pin standard sheet machine, and pressed 3.5 Kg / cm 2 × 5 min, 105 ° C. X 2 minutes for drying. The breaking length and specific burst strength of the obtained paper were measured. Table 3 shows the results.
〈試験方法〉 比破裂強さ JIS Ｐ−8112 裂断長（km） JIS Ｐ−8113 IGT（cm/sec） TAPPIスタンダード T499Su−64 IB（kg・cm） J,TAPPI紙パルプ 試験方法No,18−ｍ ［発明の効果］ 試験例の結果からも明らかなように、本発明の製紙用
添加剤は硫酸バンドの添加の有無に拘らず、非常に優れ
た紙力増強効果を有するものである。<Test method> Specific burst strength JIS P-8112 Rupture length (km) JIS P-8113 IGT (cm / sec) TAPPI standard T499Su-64 IB (kg · cm) J, TAPPI paper pulp Test method No.18- m [Effects of the Invention] As is clear from the results of the test examples, the papermaking additive of the present invention has a very excellent paper strength enhancing effect irrespective of the presence or absence of the addition of the sulfate band.
従って、本発明の製紙用添加剤は、主として酸性条件
下で抄造されて来た板紙等の製造工程は勿論、近年益々
増加傾向にある中性乃至アルカリ性条件下で抄造される
中性紙の製造工程に対しても、極めて有利に適用するこ
とができ、強度の高い成紙を得ることができるもので、
製紙工程で使用する薬品コストの低減、原料パルプにお
ける再生古紙パルプ増加、抄紙排水処理の負荷の軽減等
を可能ならしめる高い工業的価値を有するものである。Therefore, the papermaking additive of the present invention can be used not only in the production process of paperboard and the like that has been mainly produced under acidic conditions, but also in the production of neutral paper produced under neutral to alkaline conditions, which has been increasing in recent years. It can be applied very advantageously to the process, and it is possible to obtain high strength paper.
It has a high industrial value, which makes it possible to reduce the cost of chemicals used in the papermaking process, increase recycled paper pulp in raw pulp, reduce the load of papermaking wastewater treatment, and the like.
Claims (4)
％に対して、 （Ｂ）．カチオン性単量体であるジアルキルアミノア
ルキル（メタ）アクリルアミド ……２〜25モル％、 ．アニオン性単量体である（メタ）アクリル酸 ……２〜40モル％、 ．非イオン性単量体である（メタ）アクリルアミド ……35〜96モル％、 の単量体成分のみから成る単量体混合物40〜75重量％、 をグラフト共重合して得られるものから成る製紙用添加
剤。(1) 25% to 60% by weight of (A) starch and / or modified starch; Dialkylaminoalkyl (meth) acrylamide which is a cationic monomer: 2 to 25 mol%; (Meth) acrylic acid which is an anionic monomer: 2 to 40 mol%; Non-ionic monomer (meth) acrylamide: 35-96 mol%, 40-75% by weight of a monomer mixture consisting of only the monomer component: Papermaking made by graft copolymerization of Additives.
粉である特許請求の範囲第１項に記載の製紙用添加剤。2. The papermaking additive according to claim 1, wherein the starch and / or modified starch is a cationic starch.
る特許請求の範囲第１項に記載の製紙用添加剤。3. The papermaking additive according to claim 1, wherein the starch and / or modified starch is oxidized starch.
ルアミドが、ジメチルアミノプロピル（メタ）アクリル
アミドである特許請求の範囲第１項に記載の製紙用添加
剤。4. The papermaking additive according to claim 1, wherein the dialkylaminoalkyl (meth) acrylamide is dimethylaminopropyl (meth) acrylamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62047078A JP2622965B2 (en) | 1987-03-02 | 1987-03-02 | Papermaking additives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62047078A JP2622965B2 (en) | 1987-03-02 | 1987-03-02 | Papermaking additives |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63219696A JPS63219696A (en) | 1988-09-13 |
| JP2622965B2 true JP2622965B2 (en) | 1997-06-25 |
Family
ID=12765136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62047078A Expired - Fee Related JP2622965B2 (en) | 1987-03-02 | 1987-03-02 | Papermaking additives |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2622965B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9111628D0 (en) * | 1991-05-30 | 1991-07-24 | Unilever Plc | Process for manufacture |
| FI113968B (en) * | 2001-05-23 | 2004-07-15 | Raisio Chem Oy | Solution polymer stabilized with a cationic polysaccharide |
| JP6034037B2 (en) * | 2012-03-29 | 2016-11-30 | 日本製紙株式会社 | Printing paper containing heavy calcium carbonate as a filler |
| JP7524868B2 (en) | 2021-09-17 | 2024-07-30 | 荒川化学工業株式会社 | Papermaking additive, method for producing papermaking additive and paper |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5841998A (en) * | 1981-08-27 | 1983-03-11 | 播磨化成工業株式会社 | Paper strength enhancing agent |
| US4684708A (en) * | 1985-03-11 | 1987-08-04 | Akzo N.V. | Cationic grafted starch copolymers |
| JPS6245798A (en) * | 1985-08-22 | 1987-02-27 | デイック・ハーキユレス株式会社 | Papermaking additive |
| JPH0718117B2 (en) * | 1985-11-01 | 1995-03-01 | 日本ピー・エム・シー株式会社 | Papermaking additives |
-
1987
- 1987-03-02 JP JP62047078A patent/JP2622965B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63219696A (en) | 1988-09-13 |
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