JPH02133429A - Production of granular vinyl chloride resin for pasting - Google Patents
Production of granular vinyl chloride resin for pastingInfo
- Publication number
- JPH02133429A JPH02133429A JP28860688A JP28860688A JPH02133429A JP H02133429 A JPH02133429 A JP H02133429A JP 28860688 A JP28860688 A JP 28860688A JP 28860688 A JP28860688 A JP 28860688A JP H02133429 A JPH02133429 A JP H02133429A
- Authority
- JP
- Japan
- Prior art keywords
- vinyl chloride
- aqueous dispersion
- chloride resin
- sol
- granules
- 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.)
- Pending
Links
- 239000011347 resin Substances 0.000 title claims abstract description 37
- 229920005989 resin Polymers 0.000 title claims abstract description 37
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 239000006185 dispersion Substances 0.000 claims abstract description 38
- 239000007921 spray Substances 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 6
- 239000008187 granular material Substances 0.000 abstract description 24
- 238000005469 granulation Methods 0.000 abstract description 3
- 230000003179 granulation Effects 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 239000004014 plasticizer Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000010410 dusting Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 10
- 239000000843 powder Substances 0.000 description 6
- 239000000428 dust Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000007720 emulsion polymerization reaction Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000001694 spray drying Methods 0.000 description 3
- 238000010557 suspension polymerization reaction Methods 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical group CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- 241000755250 Saudi moumouvirus Species 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000012812 general test Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- -1 glycol ethers Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、懸濁重合または乳化重合でえられたペースト
加工用塩化ビニル樹脂の水性分散液から、ゾル化性に優
れた粒子状ペースト加工用塩化ビニル樹脂を製造する方
法に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention is a process for processing a particulate paste with excellent sol-forming properties from an aqueous dispersion of a vinyl chloride resin for paste processing obtained by suspension polymerization or emulsion polymerization. The present invention relates to a method for producing vinyl chloride resin for use in commercial use.
［従来の技術・発明が解決しようとする課届］ペースト
加工用塩化ビニル樹脂は、塩化ビニルまたは塩化ビニル
を主体とするモノマー混合物を、界面活性剤の存在下、
懸濁重合または乳化重合させて塩化ビニル樹脂の水性分
散液をえ、これを噴霧乾燥したのち、通常は微粉砕して
製品として供給されている。[Prior art/issues to be solved by the invention] Vinyl chloride resin for paste processing is produced by mixing vinyl chloride or a monomer mixture mainly consisting of vinyl chloride in the presence of a surfactant.
An aqueous dispersion of vinyl chloride resin is obtained by suspension polymerization or emulsion polymerization, which is spray-dried and then usually pulverized and supplied as a product.
ペースト加工用塩化ビニル樹脂が微粉砕して供給される
のは、可塑剤と混合され、ゾルにされたのち（これはゾ
ル化と呼ばれる）成形加工され、ゲル化とよばれる硬化
工程（加熱工程）を経て最終製品にされるが、塩化ビニ
ル樹脂などがゾル化しにくかったり、ゾル中にゾル化し
ていないものかのこっていたりすると、成形加工時の作
業性に問題が生じたり、最終製品の品質を落としたりす
るという問題が生じるからである。PVC resin for paste processing is supplied in finely ground form, which is mixed with a plasticizer and made into a sol (this is called sol formation), then molded and processed through a hardening process called gelation (heating process). ), but if vinyl chloride resin is difficult to convert into a sol, or if there are unsolvable substances in the sol, problems may occur during the molding process, and the quality of the final product may be affected. This is because the problem of dropping the item may occur.
しかし、ペースト加工用塩化ビニル樹脂が粉砕された微
粉の形態をとっているため、加工時のゾル化工程におい
て、開袋時の粉塵の発生などによる作業環境の悪化や、
粉体の自動計量供給が実施できないなどの問題が生じる
。However, since the vinyl chloride resin for paste processing is in the form of finely ground powder, the work environment may deteriorate due to the generation of dust during the solization process during processing, such as the generation of dust when opening the bag.
Problems arise, such as the inability to automatically measure and supply powder.
前記問題を解決すべく、ペースト加工用塩化ビニル樹脂
を造粒する試みがなされてきている。In order to solve the above problem, attempts have been made to granulate vinyl chloride resin for paste processing.
たとえば、塩化ビニル樹脂の水性分散液を噴霧乾燥する
にあたり、乾燥用空気の温度を下げることにより粉体特
性に優れ、かつゾル化性の良好な造粒体を製造する方法
が提案されている（特公昭５７−５８１５号公報および
特開昭６０−１２０７２８公報参照）。For example, a method has been proposed for spray drying an aqueous dispersion of vinyl chloride resin by lowering the temperature of the drying air to produce granules with excellent powder characteristics and good solability ( (See Japanese Patent Publication No. 57-5815 and Japanese Patent Application Laid-Open No. 60-120728).
しかし、これらの方法により造粒しても、ゾル化してえ
られるゾル中にゾル化しきらない未分散の造粒体が多数
残るという問題があるほか、この造粒体を保存するとさ
らにゾル化性が悪化し、ゾル中の該未分散物量が増大し
、ペースト加工に供しえなくなるという欠点を有する。However, even when granulated by these methods, there is a problem that many undispersed granules remain in the sol obtained by solization, and when these granules are stored, they become even more difficult to solize. This has the drawback that the sol deteriorates, the amount of undispersed matter in the sol increases, and the sol cannot be used for paste processing.
このようなゾル化性の低下を改善する方法として、グリ
コールエーテルや非イオン界面活性剤などを添加する方
法が提案されている（たとえばエフ ボニチル クンス
トシュトラフ（Ｐ。As a method to improve such a decrease in solubility, a method of adding glycol ethers, nonionic surfactants, etc. has been proposed (for example, Ef Bonitil Kunststraff (P.
Ｐｏｎ１ｚｉ１．Ｋｕｎｓｔｓｔｏｆ’ｆ’ｅ）、 ６
４．３（１９７４）） ｏ しかし、これらの物質は
、ペースト加工用塩化ビニル樹脂を加工した製品の品質
を低下させるばあいかあり、−船釣に使用しうるちので
はない。Pon1zi1. Kunststof'f'e), 6
4.3 (1974)) o However, these substances may reduce the quality of products processed from vinyl chloride resin for paste processing, and cannot be used for boat fishing.
［課題を解決するための手段］
本発明者らは、従来のペースト加工用塩化ビニル樹脂に
おける前記のごとき問題を解決するため鋭意研究を重ね
た結果、
（１）該樹脂の水性分散液は、部分的に凝集している
（２）該樹脂の水性分散液を撹拌すると、部分的な凝集
は消える
（３）撹拌後、該樹脂の水性分散液を静置すると、再び
部分的に凝集してしまう
（４）部分的に凝集した該樹脂の水性分散液を、乾燥造
粒してえられる造粒体は、ゾル化性がよくなく、また、
造粒体を保存するとゾル化性はさらにわるくなる
（５）撹拌により部分的な凝集の消えた該樹脂の水性分
散液を、乾燥・造粒してえられる造粒体はゾル化がよく
、また、造粒体を保存してもゾル化性はあまりわるくな
らない
という知見をえた。そして、該樹脂の水性分散液を撹拌
したのち、短時間の間にスプレー乾燥機に供給し、乾燥
・造粒を完了すればよいことを見出した。[Means for Solving the Problems] As a result of extensive research by the present inventors in order to solve the above-mentioned problems with conventional vinyl chloride resins for paste processing, (1) an aqueous dispersion of the resin has the following properties: Partially agglomerated (2) When the aqueous dispersion of the resin is stirred, the partial agglomeration disappears. (3) After stirring, when the aqueous dispersion of the resin is left to stand, the aqueous dispersion of the resin is partially agglomerated again. (4) The granules obtained by drying and granulating the partially agglomerated aqueous dispersion of the resin have poor solability, and
When the granules are stored, the solubility becomes worse. Furthermore, it was found that the solability did not deteriorate much even if the granules were stored. They have also discovered that after stirring the aqueous dispersion of the resin, it is sufficient to supply it to a spray dryer within a short period of time to complete drying and granulation.
本発明は前記知見に基づきなされたものであり、ペース
ト加工用塩化ビニル樹脂の水性分散液をスプレー乾燥機
で乾燥・造粒させる際に、該水性分散液を１００Ｗ／ｋ
ｇ水性分散液以上の強度で撹拌しながら該乾燥機に供給
することを特徴とする粒子状ペースト加工用塩化ビニル
樹す旨の装造方法に関する。The present invention has been made based on the above knowledge, and when drying and granulating an aqueous dispersion of vinyl chloride resin for paste processing with a spray dryer, the aqueous dispersion is heated at 100 W/k.
g. A method for preparing vinyl chloride wood for particulate paste processing, characterized in that it is fed to the dryer while being stirred at a strength higher than that of an aqueous dispersion.
［実施例］
本発明では、ペースト加工用塩化ビニル樹脂の水性分散
液がスプレー乾燥機で乾燥・造粒せしめられる。[Example] In the present invention, an aqueous dispersion of a vinyl chloride resin for paste processing is dried and granulated using a spray dryer.
前記ペースト加工用塩化ビニル樹脂の水性分散液は、塩
化ビニルまたは塩化ビニルを主体とするモノマー混合物
を、界面活性剤の存在下１、懇濁重合または乳化重合さ
せることによりえられるものであり、従来からペースト
加工用塩化ビニル樹脂を製造するために製造されている
水性分散液と同様のものであり、このようなものである
かぎりとくに限定はない。The aqueous dispersion of vinyl chloride resin for paste processing is obtained by subjecting vinyl chloride or a monomer mixture mainly composed of vinyl chloride to suspension polymerization or emulsion polymerization in the presence of a surfactant. The dispersion is similar to the aqueous dispersion that is produced for producing vinyl chloride resin for paste processing, and there is no particular limitation as long as it is such a dispersion.
本発明においては、前記水性分散液をスプレー乾燥機で
乾燥・造粒させる際に、該水性分散液が１００シバｇ水
性分散液以上の強度で撹拌されながら乾燥機に供給され
る。In the present invention, when the aqueous dispersion is dried and granulated using a spray dryer, the aqueous dispersion is supplied to the dryer while being stirred at an intensity of at least 100 g of the aqueous dispersion.
前記のごとき強度で撹拌したのち乾燥機に供給されるた
め、水性分散液中に存在する部分的凝集が少なくなり、
この状態でスプレー乾燥せしめられるため、えられた造
粒体をゾル化したばあいにもゾル中の粗粒が少なくなる
。Since it is fed to the dryer after being stirred at the intensity described above, partial aggregation that exists in the aqueous dispersion is reduced.
Since spray drying is carried out in this state, when the obtained granules are made into a sol, the number of coarse particles in the sol is reduced.
なお、前記水性分散液は、７０〜８０°Ｃ以上で不可逆
的に凝集する性質を有している。それゆえ、前記撹拌の
強度がｔｏｏｏＷ／ｋｇ水性分散液以上になると、水性
分散液の温度が短時間で上昇し、水性分散液は不可逆的
に凝集しやすくなる。温度上昇を防ぐために水性分散液
を冷却しながら撹拌することも可能ではあるが、効率的
ではない。Note that the aqueous dispersion has a property of irreversibly coagulating at temperatures of 70 to 80°C or higher. Therefore, when the intensity of the stirring exceeds too W/kg of the aqueous dispersion, the temperature of the aqueous dispersion increases in a short period of time, and the aqueous dispersion tends to coagulate irreversibly. Although it is possible to stir the aqueous dispersion while cooling it to prevent temperature rise, this is not efficient.
前記撹拌時間は、撹拌槽での平均滞留時間で１分以上で
あれば充分である。As for the stirring time, it is sufficient if the average residence time in the stirring tank is 1 minute or more.
また撹拌後、好ましくは５分以内にスプレ乾燥機に供給
するのが好ましい。Further, it is preferable to feed the mixture to a spray dryer preferably within 5 minutes after stirring.
撹拌に用いる装置にはとくに限定はなく、たとえば一般
のかい型撹拌機、プロペラ型撹拌機、タービン型撹拌機
の他、高速回転式ホモゲナイザー、超音波式ホモゲナイ
ザーなどを採用すればよい。The device used for stirring is not particularly limited, and for example, a general paddle-type stirrer, a propeller-type stirrer, a turbine-type stirrer, a high-speed rotation homogenizer, an ultrasonic homogenizer, etc. may be employed.
このようにしてｙ３製された水性分散液を乾燥・造粒す
るために用いるスプレー乾燥機にはとくに限定はなく、
一般に使用されているものが使用されうる。このような
スプレー乾燥機の具体例としては、たとえば「スプレィ
・ドライイング・ハンドブック（ＳＰＲＡＹ ＤＲＹＩ
ＮＧ ＩＩＡＮＤＢＯＯＫ） Ｊ（ケイ・マスタース（
Ｋ、Ｍａｓｌｅｒｓ）著、３版、１９７９年、ジョージ
・ゴツトウィン社（ｃｅｏｒｇｅＧｏｄｗｌｎ ＬＩＩ
Ｉｌｌｔｅｄ）より出版）１２１頁の第４．１０図に記
載のごとき各種スプレー乾燥機があげられる。There are no particular limitations on the spray dryer used to dry and granulate the aqueous dispersion produced in this way.
Those commonly used can be used. As a specific example of such a spray dryer, for example, "Spray Drying Handbook (SPRAY DRYI)
NG IIANDBOOK) J (Kay Masters)
K. Maslers, 3rd edition, 1979, George Godwin LII.
There are various spray dryers such as those shown in Figure 4.10 on page 121 (Published by Illted).
スプレー乾燥機でペースト加工用塩化ビニル樹脂の水性
分散液を造粒する際、まず水性分散液がスプレー乾燥機
内のアトマイザ−で噴霧され、ついで乾燥せしめられて
造粒体が製造され、系外に取出される。When granulating an aqueous dispersion of vinyl chloride resin for paste processing using a spray dryer, the aqueous dispersion is first atomized by an atomizer inside the spray dryer, then dried to produce granules, which are then released from the system. taken out.
他の乾燥条件にはとくに限定はなく、たとえば乾燥に用
いる空気の温度は１５０℃以下、好ましくは１００℃以
下、また乾燥機からでる排風の温度は、６０°Ｃ以下、
好ましくは５０°Ｃ以下のように従来から一般に採用さ
れている条件でよい。Other drying conditions are not particularly limited; for example, the temperature of the air used for drying is 150°C or lower, preferably 100°C or lower, and the temperature of the exhaust air from the dryer is 60°C or lower.
Preferably, conditions generally employed heretofore, such as 50°C or less, may be used.
このようにして従来から使用されている微粉砕されたペ
ースト加工用塩化ビニル樹脂と同程度のゾル化性を有し
、該樹脂が有する開袋時の粉塵の発生などによる作業環
境の悪化や粉体の自動針２供給が実施できないなどの問
題の解決された平均粒径が３０〜１００店であり、粉体
特性の指標の一つである安息角が３０〜４０度であり、
後述のゾル中未分散物の大きさ測定法で評価したばあい
に未分散物の大きさが、５０虜以下になるがごとき粒子
状ペースト加工用塩化ビニル樹脂が製造される。In this way, it has a sol-forming property comparable to that of the conventionally used finely pulverized vinyl chloride resin for paste processing, and it is possible to avoid deterioration of the working environment due to the generation of dust when opening bags, etc. Problems such as the inability to carry out automatic needle feeding of the body are solved.The average particle size is 30 to 100 degrees, and the angle of repose, which is one of the indicators of powder properties, is 30 to 40 degrees.
A particulate vinyl chloride resin for paste processing is produced in which the size of undispersed matter in a sol is 50 mm or less when evaluated by the method for measuring the size of undispersed matter in a sol, which will be described later.
つぎに本発明の方法を実施例にもとづき説明する。Next, the method of the present invention will be explained based on examples.
なお、ゾル特性、造粒体の平均粒径、安息角および保存
性は下記の方法で評価した。The sol properties, average particle diameter, angle of repose, and storage stability of the granules were evaluated by the following methods.
（ゾル中の未分散物の大きさ）
造粒体５００ｇとジオクチルフタレート ３２５ｇとを
５ｇのホバートミキサー（鈎品用工業所製、ＳＤＭＶ型
）に入れ、２５℃でフックペラで自転１４１ｒｐＩ１１
、公転Ｇ７ｒｐｍの速度で１０分間混合攪拌し、ゾルを
製造する。ゾル中の未分散物の大きさをＪＩＳ Ｋ ５
４００ ｒ塗料一般試験方法」 ４４ つぶの試験の
方法でａＰＩ定し、Ａ法で判定する。すなわち、つぶゲ
ージのみぞにゾルを注ぎ込み、スクレーパーでしごいて
、みぞの中に厚さが１００ρからＯｔｔｍまで連続して
変化するようにしてゾルの層を作り、つぶが現れた部分
の層の厚さを読んで、ゾルの中に存在するつぶの集塊の
直径の大きさを推定する。(Size of undispersed matter in the sol) 500 g of the granules and 325 g of dioctyl phthalate were placed in a 5 g Hobart mixer (manufactured by Kagakuin Yogyo Co., Ltd., SDMV type), and rotated at 25°C with a hook propeller at 141 rpI11.
The mixture was mixed and stirred for 10 minutes at a revolution speed of G7 rpm to produce a sol. The size of undispersed matter in the sol is determined by JIS K 5.
400r General Test Method for Paints 44 Determine aPI using the Tsubu test method and judge using A method. That is, pour the sol into the groove of the grain gauge and squeeze it with a scraper to create a layer of sol in the groove so that the thickness changes continuously from 100ρ to Ottm, and remove the layer where the grain appears. Read the thickness to estimate the diameter of the agglomerates present in the sol.
（フィルム中の未分散物の個数）
クリアランスが１５２虜のフィルムアプリケータを用い
、［ゾル中の未分散物の大きさ］の測定に用いたゾルを
ガラス板上にのばし、これを２００℃のオーブン中に４
分間いれてゲル化させてフィルムを作製する。このフィ
ルムから縦横３ ｃｍ Ｘ ３ ｃｍの試料を切取り、
試料中のフィッンユアイを肉眼で見てかぞえる。(Number of undispersed substances in the film) Using a film applicator with a clearance of 152 mm, the sol used for measuring [the size of undispersed substances in the sol] was spread on a glass plate, and the sol was heated at 200°C. 4 in the oven
Leave to gel for a few minutes to create a film. Cut out a sample measuring 3 cm x 3 cm from this film.
Count the fins in the sample with the naked eye.
（造粒体の平均粒径）
１００如以上は篩で分級し、それ以下はコールタ−カウ
ンターで粒径分布を測定し１．平均粒径を求める。(Average particle size of granules) If the particle size is 100 or more, it is classified using a sieve, and if it is smaller than that, the particle size distribution is measured using a Coulter counter.1. Find the average particle size.
（安息角）
■部用粉体工学研究所製、パウダーテスターで測定する
。(Angle of repose) ■Measure with a powder tester manufactured by the Powder Technology Research Institute.
（保存性）
造粒体を３０℃の恒温室で３力月間保存したのち、これ
から製造したゾル中の未分散物の大きさおよびフィルム
中の未分散物個数を評価する。(Storability) After storing the granules in a constant temperature room at 30° C. for 3 months, the size of the undispersed particles in the sol produced from the granules and the number of undispersed particles in the film are evaluated.
実施例１
ドデシルベンゼンスルホン酸ソーダをペースト加工用塩
化ビニル樹脂１００部に対して１部となるように用いた
重合でえられた固形分濃度４７％のペースト加工用塩化
ビニル樹脂の水性分散液１ｋｇを、１ｊ７のステンレス
ビーカーに供給し、高速回転式ホモゲナイザ−（シルバ
ーソン社製）で出力２００Ｗで撹拌しながら（平均滞留
時間１２０秒）、回転円盤式のアトマイザ−を有するス
プレー乾燥機（塔径２．７５ｍ 、塔長は直胴部が３．
０ｍ。Example 1 1 kg of an aqueous dispersion of vinyl chloride resin for paste processing with a solid content concentration of 47% obtained by polymerization using sodium dodecylbenzenesulfonate in an amount of 1 part per 100 parts of vinyl chloride resin for paste processing. was supplied to a 1j7 stainless steel beaker, and while stirring at an output of 200 W with a high-speed rotary homogenizer (manufactured by Silverson) (average residence time 120 seconds), a spray dryer (tower diameter: The tower is 2.75m long and the straight body is 3.5m long.
0m.
円錐部が２．２ｍ、円錐部角度が６０度）で乾燥、造粒
した。乾燥に用いた空気は除湿機を通して湿度を０．０
１ｋｇ水／ｋｇ空気としたのちｇ ｏ ’ｃに加熱した
ものであり、回転円盤の回転数は１４０００ｒｐｍであ
った。その他の乾燥条件ならびに造粒体の特性、該造粒
体から製造したゾル中の未分散物の大きさおよびフィル
ム中の未分散物の個数の評価結果を第１表に示す。The product was dried and granulated using a cone of 2.2 m and a cone angle of 60 degrees. The air used for drying is passed through a dehumidifier to reduce the humidity to 0.0.
The mixture was made into 1 kg water/kg air and then heated to a temperature of 1 kg, and the rotation speed of the rotating disk was 14,000 rpm. Other drying conditions, characteristics of the granules, the size of undispersed particles in the sol produced from the granules, and the number of undispersed particles in the film are shown in Table 1.
なお、造粒体の水分率は、カールフィッシャー水分計（
京都電子工業■製のＭＫＡ−３Ｐ型）で測定した。The moisture content of the granules was measured using a Karl Fischer moisture meter (
The measurement was carried out using a MKA-3P model (manufactured by Kyoto Denshi Kogyo ■).
実施例２
撹拌を超音波式ホモゲナイザ−（■日本精機製作新製の
ＵＳ−３００）で出力１５０νで実施（平均滞留時間１
２０秒）した他は、実施例１と同じ方法で造粒体を製造
し、評価した。結果を第１表に示す。Example 2 Stirring was carried out using an ultrasonic homogenizer (US-300 manufactured by Nippon Seiki Co., Ltd.) at an output of 150 ν (average residence time of 1
The granules were produced and evaluated in the same manner as in Example 1, except that the test was carried out for 20 seconds). The results are shown in Table 1.
比較例１
実施例１で用いたのと同じ固形分濃度４７％のペースト
加工用塩化ビニル樹脂の水性分散液を撹拌せずにスプレ
ー乾燥機に供給した他は実施例１と同じ方法で造粒体を
製造し、評価した。Comparative Example 1 Granulation was performed in the same manner as in Example 1, except that the aqueous dispersion of vinyl chloride resin for paste processing with the same solid content concentration of 47% as used in Example 1 was supplied to the spray dryer without stirring. The body was manufactured and evaluated.
結果を第１表に示す。The results are shown in Table 1.
［以下余白コ
第１表の結果から、比較例１でえられた造粒体からのゾ
ル中の未分散物は大きく、このゾルからのフィルム中に
は未分散物が多く存在することがわかる。また、比較例
１でえられた造粒体は長時間保存するとゾル化性の低下
する傾向が大きいことがわかる。[From the results in Table 1 below, it can be seen that the amount of undispersed materials in the sol from the granules obtained in Comparative Example 1 is large, and that there are many undispersed materials in the film from this sol. . Furthermore, it can be seen that the granules obtained in Comparative Example 1 have a strong tendency to deteriorate in solubility when stored for a long time.
［発明の効果］
本発明の方法によりえられるペースト加工用塩化ビニル
樹脂の造粒体は、開袋時、可塑剤との混合・ゾル化時の
粉塵発生の問題がほとんど生じない。さらに該造粒体は
、流れ性、ゾル化性に優れ、これらの特性が長期間保存
しても低下しにくいものである。[Effects of the Invention] The granules of vinyl chloride resin for paste processing obtained by the method of the present invention hardly cause the problem of dust generation when opening the bag, mixing with a plasticizer, and forming a sol. Furthermore, the granules have excellent flowability and sol-forming properties, and these properties do not easily deteriorate even after long-term storage.
Claims (1)
レー乾燥機で乾燥・造粒させる際に、該水性分散液を１
００Ｗ／ｋｇ水性分散液以上の強度で撹拌しながら該乾
燥機に供給することを特徴とする粒子状ペースト加工用
塩化ビニル樹脂の製造方法。 ２ 高速回転式ホモゲナイザーで撹拌する請求項１記載
の方法。 ３ 超音波式ホモゲナイザーで撹拌する請求項１記載の
方法。[Claims] 1. When drying and granulating an aqueous dispersion of vinyl chloride resin for paste processing with a spray dryer, the aqueous dispersion is
A method for producing a vinyl chloride resin for particulate paste processing, characterized in that the vinyl chloride resin is supplied to the dryer while stirring at an intensity of 00 W/kg or more for an aqueous dispersion. 2. The method according to claim 1, wherein the mixture is stirred using a high-speed rotary homogenizer. 3. The method according to claim 1, wherein the stirring is performed using an ultrasonic homogenizer.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28860688A JPH02133429A (en) | 1988-11-14 | 1988-11-14 | Production of granular vinyl chloride resin for pasting |
| EP89121035A EP0369387B1 (en) | 1988-11-14 | 1989-11-13 | Spherical vinyl chloride resin granules and process for producing the same |
| DE68926380T DE68926380T2 (en) | 1988-11-14 | 1989-11-13 | Spherical vinyl chloride resin granules and process for their manufacture |
| KR1019890016383A KR0156564B1 (en) | 1988-11-14 | 1989-11-13 | Spherical vinylchloride resin particle and method thereof |
| CA002002920A CA2002920A1 (en) | 1988-11-14 | 1989-11-14 | Spherical vinyl chloride resin granules and process for producing the same |
| US07/987,238 US5378786A (en) | 1988-11-14 | 1992-12-07 | Spherical vinyl chloride granules for paste molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28860688A JPH02133429A (en) | 1988-11-14 | 1988-11-14 | Production of granular vinyl chloride resin for pasting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02133429A true JPH02133429A (en) | 1990-05-22 |
Family
ID=17732401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28860688A Pending JPH02133429A (en) | 1988-11-14 | 1988-11-14 | Production of granular vinyl chloride resin for pasting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02133429A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4059929B2 (en) * | 1997-07-07 | 2008-03-12 | 新第一塩ビ株式会社 | Vinyl chloride resin granules for paste processing and manufacturing method thereof |
-
1988
- 1988-11-14 JP JP28860688A patent/JPH02133429A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4059929B2 (en) * | 1997-07-07 | 2008-03-12 | 新第一塩ビ株式会社 | Vinyl chloride resin granules for paste processing and manufacturing method thereof |
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