JPS603110B2 - Method for producing calcium carbonate water slurry for paper coating - Google Patents
Method for producing calcium carbonate water slurry for paper coatingInfo
- Publication number
- JPS603110B2 JPS603110B2 JP10006876A JP10006876A JPS603110B2 JP S603110 B2 JPS603110 B2 JP S603110B2 JP 10006876 A JP10006876 A JP 10006876A JP 10006876 A JP10006876 A JP 10006876A JP S603110 B2 JPS603110 B2 JP S603110B2
- Authority
- JP
- Japan
- Prior art keywords
- calcium carbonate
- slurry
- paper coating
- acrylic acid
- less
- 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
Links
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims description 62
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims description 31
- 239000002002 slurry Substances 0.000 title claims description 17
- 238000000576 coating method Methods 0.000 title claims description 9
- 239000011248 coating agent Substances 0.000 title claims description 7
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 2
- 239000002245 particle Substances 0.000 claims description 15
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 10
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 claims description 9
- 239000007900 aqueous suspension Substances 0.000 claims description 8
- 238000006116 polymerization reaction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims 2
- -1 alkali metal salt Chemical class 0.000 claims 2
- 238000001914 filtration Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 159000000000 sodium salts Chemical class 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 4
- 229920002125 Sokalan® Polymers 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 235000011116 calcium hydroxide Nutrition 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 3
- 239000004584 polyacrylic acid Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical class [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000012756 surface treatment agent Substances 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
Landscapes
- Paper (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Description
【発明の詳細な説明】
本発明は、二次凝集の少ない炭酸カルシウムからなる紙
塗被用水スラリーの製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a water slurry for coating paper made of calcium carbonate with little secondary agglomeration.
炭酸カルシウムを紙塗被用顔料として使用する場合は、
白色度、不透明度、光沢度および印刷適性などの優れた
印刷用紙を得るためには、炭酸カルシウムの粒子は凝集
が少なく、且つ、その粒度分布もシャープなことが要求
されている。When using calcium carbonate as a pigment for paper coating,
In order to obtain printing paper with excellent whiteness, opacity, gloss, and printability, calcium carbonate particles are required to have less agglomeration and a sharp particle size distribution.
従来、紙塗被用炭酸カルシウム水スラリーの製造方法と
しては、炭酸カルシウム粉体あるいはプレスケーキにア
クリル酸またはメタクリル酸の量合体を添加して、強力
に燈拝し、スラリー化する方法が知られているが、これ
らの方法で製造した炭酸カルシウムスラリ−は、炭酸カ
ルシウム粒子の二次凝集が起りやすく、且つ、それを再
分散させることが困難であることに起因して、広い粒度
分布のものしか得られておらず、また、スラリー化に要
するアクリル酸またはメタクリル酸の重合体は高価なた
め、その所要量も経済性を考慮した場合、その減量が望
まれていた。Conventionally, a known method for producing a calcium carbonate aqueous slurry for paper coating is to add a certain amount of acrylic acid or methacrylic acid to calcium carbonate powder or press cake, and then vigorously heat the mixture to form a slurry. However, calcium carbonate slurries produced by these methods tend to have a wide particle size distribution because secondary aggregation of calcium carbonate particles easily occurs and it is difficult to redisperse them. Moreover, since the acrylic acid or methacrylic acid polymer required for slurrying is expensive, it has been desired to reduce the required amount from economic considerations.
そこで、本発明者等はこれらの匁点を除去すべく種々研
究の結果、従来は単に鮫機鉱物粉の高濃度水スラリーの
粘度調整剤として用いられていたアクリル酸またはメタ
クリル酸の重合体を、実施例に示しているように、その
全使用量の約半量を、炭酸化反応直後の炭酸カルシウム
約１０％を含む水懸濁液について、炭酸カルシウムに対
する表面処理剤として前処理させることにより、前述の
品質上および経済上の問題を解決できることを見出した
。Therefore, as a result of various studies in order to remove these momme points, the present inventors have developed a polymer of acrylic acid or methacrylic acid, which was previously used simply as a viscosity modifier for a highly concentrated aqueous slurry of Sameki mineral powder. As shown in the examples, by pre-treating about half of the total amount used as a surface treatment agent for calcium carbonate with an aqueous suspension containing about 10% of calcium carbonate immediately after the carbonation reaction. It has been found that the quality and economic problems mentioned above can be solved.
基材としての炭酸カルシウム粒子については、−毅に塗
被繊に用いられる平均粒子蓬２山以下のものであれば、
特に制限はない。Regarding calcium carbonate particles as a base material, if the average particle size used for coating fibers is less than 2,
There are no particular restrictions.
また、アクリル酸またはメタクリル酸の重合体としては
、通常用いられている重合度１０００以下のポリアクリ
ル酸ソーダやポリメタクリル酸ソ−ダ等が支障なく使用
しうる。低濃度の炭酸カルシウム水懸濁液に添加するア
クリル酸またはメタクリル酸の重合体の量は、炭酸カル
シウムに対し０．３％以下では炭酸カルシウム粒子の二
次凝集の防止には不十分であり、反面１．０％以上添加
した場合には、後工程で炭酸カルシウムを約１０％含む
水懸濁液をフィルタープレス等の脱水機で炭酸カルシウ
ムの含有率を５０〜６５％にあげる際の脱水ケーキの取
得が困難になるため実用的でない。Further, as the polymer of acrylic acid or methacrylic acid, commonly used sodium polyacrylate, sodium polymethacrylate, etc. having a degree of polymerization of 1000 or less can be used without any problem. If the amount of acrylic acid or methacrylic acid polymer added to a low concentration calcium carbonate aqueous suspension is 0.3% or less based on calcium carbonate, it is insufficient to prevent secondary aggregation of calcium carbonate particles. On the other hand, if 1.0% or more is added, a dehydrated cake will be produced when a water suspension containing approximately 10% calcium carbonate is used in a dehydrator such as a filter press to raise the calcium carbonate content to 50 to 65% in the subsequent process. is not practical as it would be difficult to obtain.
その理由は、上記炭酸カルシウムの水懸濁液に添加され
たアクリル酸またはメタクリル酸の重合体が炭酸カルシ
ウムの表面に吸着され、これが粘度低下剤として働き、
脱水工程で炭酸カルシウムの濃度があがっても、なおス
ラリーまたはこれに近い状態であるため、脱水ケーキの
形として取得いこくくなるためである。また、実施例で
記載しているが、遠心分離機で脱水した固形分約５５％
のケーキに対して、ケーキのスラリー化剤として後添加
（後処理）するアクリル酸またはメタクリルの重合体を
、紙塗工工程で要望されるスラリー粘度、すなわち、Ｂ
型粘度計で６仇ｐｍにより、約１０比ｐとなるように添
加し、ついで、鷹梓、混合、分散および粉砕させるもの
である。The reason is that the acrylic acid or methacrylic acid polymer added to the aqueous suspension of calcium carbonate is adsorbed on the surface of calcium carbonate, and this acts as a viscosity reducing agent.
This is because even if the concentration of calcium carbonate increases during the dehydration process, it is still in a slurry or similar state, making it difficult to obtain it in the form of a dehydrated cake. In addition, as described in the examples, the solid content after dehydration using a centrifuge is approximately 55%.
An acrylic acid or methacrylic polymer, which is post-added (post-treated) as a cake slurry agent, is added to the cake at a slurry viscosity required in the paper coating process, that is, B
It is added so that the ratio is about 10 at 6 PM using a type viscometer, and then mixed, dispersed, and pulverized.
これによって、紙塗被用高濃度炭酸カルシウムスラリー
としての実用性を有する本発明品を完成させるものであ
る。つぎに、本発明実施の方法について例をあげて＊詳
しく説明する。This completes the product of the present invention, which has practical utility as a highly concentrated calcium carbonate slurry for coating paper. Next, the method of implementing the present invention will be explained in detail by giving an example.
実施例 １
水酸化カルシウム７４０夕を含む石灰乳Ｉ０そに濃度２
０〜３０％の炭酸ガスを１００００Ｚ′ｈで吹きこみ、
懸濁液の軸が７になった後もなお５分間、上記の炭酸ガ
スを継続して吹きこみ、水酸化カルシウムの炭酸化を十
分に行なわせて得た平均粒子蓬０．７ムの炭酸カルシウ
ムｌｋ９を含む水懸濁液を生成させる。Example 1 Milk of lime containing 740 grams of calcium hydroxide, concentration 2
Blow 0 to 30% carbon dioxide gas at 10,000 Z'h,
Even after the axis of the suspension reached 7, the above carbon dioxide gas was continued to be blown into the suspension for 5 minutes to sufficiently carbonate the calcium hydroxide. An aqueous suspension containing calcium lk9 is produced.
ついで、上記の炭酸カルシウム水懸濁液に、重合度約７
００のポリアクリル酸ソーダ塩の２０％液を２５夕加え
て強力に縄拝したのち、炭酸カルシウム粒子の表面にポ
リァクリル酸ソーダ塩が完全に吸着するよう一昼夜放置
してから、遠心分離機で脱水して、固形分約５５％のケ
ーキとする。Next, the above calcium carbonate aqueous suspension was added with a polymerization degree of about 7.
After adding a 20% solution of 00 sodium polyacrylate for 25 days and stirring it vigorously, leave it for a day and night so that the sodium polyacrylate was completely adsorbed on the surface of the calcium carbonate particles, and then dehydrate it with a centrifuge. to make a cake with a solids content of about 55%.
このケーキをニーダ一等の雑和機にうつして練り合せな
がら上記のポＩＪアクリル酸ソーダ塩の２０％液を３５
タ添加してスラリー化する。添加終了時のスラリーの粘
度はＢ型粘度計で６比ｐｍの場合、約１０比ｐである。
このスラリーをサンドグラインダーで約５分間処理して
実施例１の製品（固型分私％）を得た。Transfer this cake to a first-class kneader and knead it while adding 35% of the 20% solution of the above PoIJ sodium acrylic acid salt.
and slurry. The viscosity of the slurry at the end of the addition is approximately 10 ratio p when measured with a B-type viscometer at 6 ratio pm.
This slurry was processed with a sand grinder for about 5 minutes to obtain the product of Example 1 (solids content %).
実施例 ２実施例１に記載のポリアクリル酸ソーダ塩を
、ポリメタクリル酸ソ−ダ塩と読みかえる他はすべて実
施例１と同様に行ない、実施例２の製品（固形分離％）
を得た。Example 2 The same procedure as in Example 1 was carried out except that the polyacrylic acid sodium salt described in Example 1 was replaced with polymethacrylic acid sodium salt, and the product of Example 2 (solid separation %)
I got it.
試験結果
第 ］表 粒 度 分 布（％） く比重計法による）
第 ２ 表 粘度（ｃｐ〆６０ｒｐｍ） （Ｂ型
粘度計で測定）※ポリアクリル酸ソーダ塩無添加の炭酸
カルシウム水懸濁液を脱水炉過して、固形分５５％とし
たもの、すなわち、前処理していないものに、実施例１
で用いたポリアクリル酸ソーダ塩の全量と同量のポリア
クリル酸ソーダ塩を加えて、固形分５４％としたものｏ
※※ポリメタクリル酸ソーダ塩無添加の炭酸カルシウム
水懸濁液を脱水炉遇して、固形分５５％としたもの、す
なわち、前処理していないものに、実施例２で用いたポ
リメタクリル酸ソーダ塩の全量と同量のポリメタクリル
酸ソーダ塩を加えて、固形分５４％としたもの。Test results table Particle size distribution (%) (according to hydrometer method)
Table 2 Viscosity (CP〆60 rpm) (Measured with a B-type viscometer) Example 1 for untreated
The same amount of polyacrylic acid sodium salt as the total amount of the polyacrylic acid sodium salt used in was added to make the solid content 54% o
※※Polymethacrylic acid used in Example 2 was added to a calcium carbonate aqueous suspension without the addition of sodium polymethacrylic acid salt in a dehydration furnace to achieve a solid content of 55%, that is, without pretreatment. The same amount of polymethacrylic acid sodium salt as the total amount of soda salt was added to make the solid content 54%.
第１表は、実施例１の製品は対照品１よりも、また実施
例２の製品は対照品２よりも、それぞれ粒度分布の幅が
狭く、且つ、平均粒子蓬も電子顕微鏡で観察した一次粒
子径に近い値を示している。また、第１表および第２表
の結果から各実施例の製品は各対照品とくらべ、紙塗工
工程で要望される約１０比ｐのスラリー化に要するアク
リル酸またはメタクリル酸の重合体の量は、一時に添加
するよりも、例えば、前処理と後処理に分割して添加し
た方が、得られた炭酸カルシウムスラリー中の炭酸カル
シウム粒子の分散性および炭酸カルシウムスラリーの粘
度低下の両面から、効果的であることが明らかである。Table 1 shows that the product of Example 1 has a narrower particle size distribution than Control Product 1, and the product of Example 2 has a narrower particle size distribution than Control Product 2. It shows a value close to the particle diameter. In addition, from the results in Tables 1 and 2, the products of each Example compared with each control product showed that the amount of acrylic acid or methacrylic acid polymer required to form a slurry with a ratio of about 10 p required in the paper coating process was Rather than adding the amount all at once, for example, it is better to add the calcium carbonate particles in pre-treatment and post-treatment in order to improve the dispersibility of calcium carbonate particles in the resulting calcium carbonate slurry and reduce the viscosity of the calcium carbonate slurry. , is clearly effective.
Claims (1)
、前処理として重合度１０００以下のアクリル酸または
メタクリル酸のアルカリ金属塩重合体を、炭酸カルシウ
ム１００部に対し、０．３ないし１．０部加えたものを
濾過して得たケーキに、更に、後処理として重合度１０
００以下のアクリル酸またはメタクリル酸のアルカリ金
属塩重合体を、炭酸カルシウム１００部に対し、０．５
ないし１．５部加えたあと、撹拌、混合、分散および粉
砕させることを特徴とする、紙塗被用炭酸カルシウム水
スラリーの製造方法。1. To an aqueous suspension of calcium carbonate with an average particle size of 2 μm or less, as a pretreatment, add an alkali metal salt polymer of acrylic acid or methacrylic acid with a degree of polymerization of 1000 or less to 100 parts of calcium carbonate in a proportion of 0.3 to 1. The cake obtained by filtering 0 part of the added material was further treated with a polymerization degree of 10 as a post-treatment.
0.00 or less alkali metal salt polymer of acrylic acid or methacrylic acid, per 100 parts of calcium carbonate, 0.5
A method for producing an aqueous slurry of calcium carbonate for coating paper, which comprises adding from 1 to 1.5 parts, followed by stirring, mixing, dispersing and pulverizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10006876A JPS603110B2 (en) | 1976-08-20 | 1976-08-20 | Method for producing calcium carbonate water slurry for paper coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10006876A JPS603110B2 (en) | 1976-08-20 | 1976-08-20 | Method for producing calcium carbonate water slurry for paper coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5325646A JPS5325646A (en) | 1978-03-09 |
| JPS603110B2 true JPS603110B2 (en) | 1985-01-25 |
Family
ID=14264134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10006876A Expired JPS603110B2 (en) | 1976-08-20 | 1976-08-20 | Method for producing calcium carbonate water slurry for paper coating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS603110B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5881694A (en) * | 1981-11-11 | 1983-05-17 | 三菱製紙株式会社 | lightweight gravure paper |
| JPS59192796A (en) * | 1983-04-11 | 1984-11-01 | 神崎製紙株式会社 | Coating composition for gravure printing paper |
| JPH07107239B2 (en) * | 1985-10-02 | 1995-11-15 | 奥多摩工業株式会社 | Papermaking method |
| JP2546875B2 (en) * | 1988-03-02 | 1996-10-23 | 株式会社日立製作所 | Magnetoresistive head |
| JP3086731B2 (en) * | 1991-09-30 | 2000-09-11 | 株式会社東芝 | Magnetoresistive magnetic head |
| FR2842436B1 (en) | 2002-07-17 | 2005-05-06 | Omya Sa | PROCESS FOR THE PREPARATION OF AQUEOUS SUSPENSIONS OF MINERAL. AQUEOUS SUSPENSIONS OF MINERAL CHARGES OBTAINED AND USES THEREOF |
| FR2896171B1 (en) * | 2006-01-19 | 2010-12-17 | Omya Development Ag | PROCESS FOR MANUFACTURING PARTICLES BASED ON NATURAL CALCIUM CARBONATE AND SALTS OF ETHYLENE ACRYLIC ACID, SUSPENSIONS AND DRY PIGMENTS OBTAINED, AND USES THEREOF |
-
1976
- 1976-08-20 JP JP10006876A patent/JPS603110B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5325646A (en) | 1978-03-09 |
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