JP3248528B2 - Granular additive for synthetic resin and method for producing the same - Google Patents

Granular additive for synthetic resin and method for producing the same

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Publication number
JP3248528B2
JP3248528B2 JP34703399A JP34703399A JP3248528B2 JP 3248528 B2 JP3248528 B2 JP 3248528B2 JP 34703399 A JP34703399 A JP 34703399A JP 34703399 A JP34703399 A JP 34703399A JP 3248528 B2 JP3248528 B2 JP 3248528B2
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JP
Japan
Prior art keywords
additive
resin
thermoplastic resin
granular
powdery
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 - Lifetime
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JP34703399A
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Japanese (ja)
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JP2001164132A (en
Inventor
新悟 菱田
Original Assignee
新悟 菱田
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Description

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

【0001】[0001]

【発明の属する技術分野】本発明は、成形用合成樹脂の
添加剤に関するものであり、特に、成形用熱可塑性樹脂
に対する添加剤に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an additive for a synthetic resin for molding, and more particularly to an additive for a thermoplastic resin for molding.

【0002】[0002]

【従来の技術】成形用の合成樹脂に対する添加剤として
は、着色剤、改質剤、安定剤、抗酸化剤、紫外線吸収
剤、難燃剤、充填剤、発泡剤、帯電防止剤、抗菌剤等、
各種のものがある。従来、これらの添加剤を添加して成
形品を製造する方法としては、例えばドライカラーのよ
うな粉末状着色剤等を粉末のまま成形用樹脂に混合して
成形する方法、成形用樹脂に添加剤を高濃度に練り込ん
でペレット状にしたマスターバッチといわれるものを成
形用樹脂に混合して成形する方法等がある。しかし、添
加剤を粉末状のまま成形用樹脂に混合する方法では、粉
体の飛散による作業環境、作業者、更には成形機への汚
染が問題となり、次第にその使用が減少しており、ペレ
ット化により飛散を防止したマスターバッチ方式が主流
になっている。
2. Description of the Related Art Additives for synthetic resins for molding include colorants, modifiers, stabilizers, antioxidants, ultraviolet absorbers, flame retardants, fillers, foaming agents, antistatic agents, antibacterial agents and the like. ,
There are various types. Conventionally, as a method of manufacturing a molded article by adding these additives, for example, a method of mixing a powdered colorant such as a dry color or the like with a molding resin as it is in a powder form and adding the molding resin to the molding resin For example, there is a method in which a so-called masterbatch which is kneaded into a pellet shape by kneading the agent at a high concentration is mixed with a molding resin and molded. However, in the method in which the additive is mixed with the molding resin in powder form, contamination of the working environment, workers, and further the molding machine due to scattering of the powder becomes a problem, and the use thereof is gradually decreasing, and pellets are being used. The masterbatch system, which has prevented scattering due to the introduction of the system, has become mainstream.

【0003】ところが、このマスターバッチ方式の場合
には、第1工程で着色剤等の必要な添加剤を混合して添
加剤混合物を調製し、第2工程で前記添加剤混合物と成
形用樹脂とを混合し、第3工程で前記添加剤と樹脂との
混合物をロールやエクストルーダーを用いて加熱混練
し、第4工程で前記混練物を冷却、カッティングしてペ
レット化し、更に第5工程で選別機を用いてペレットの
粒度を揃えて完成する、といった非常に煩雑な製造工程
を必要とする。更に、このマスターバッチは、その使用
量が成形用樹脂に対し1〜5重量%と少量であり、しか
も各種成形用樹脂ごとに製造する必要があるため多くの
品種が必要となる。このため、少量多品種のマスターバ
ッチを製造することになり、マスターバッチ製造工程に
おける品種の切り換えが度重なり、そのための時間や材
料のロスと手間とが大きな問題となっている。更に、マ
スターバッチ方式の場合には、通常、成形用樹脂に対し
て1〜5重量%程度のマスターバッチのペレットが添加
されるが、添加されたマスターバッチのペレットが成形
用樹脂中に散在し、混合不良による濃度の偏りが発生す
る場合がある。
However, in the case of this master batch method, a necessary additive such as a colorant is mixed in a first step to prepare an additive mixture, and in a second step, the additive mixture and a molding resin are mixed. , And in a third step, a mixture of the additive and the resin is heated and kneaded using a roll or an extruder. In a fourth step, the kneaded substance is cooled, cut, pelletized, and further sorted in a fifth step. A very complicated manufacturing process, such as completing the pellets with a uniform particle size using a machine, is required. Further, the masterbatch is used in a small amount of 1 to 5% by weight with respect to the molding resin, and needs to be manufactured for each molding resin. For this reason, a master batch of many kinds of small batches is manufactured, and the kind of the master batch is repeatedly switched in the master batch manufacturing process, and the time, the loss of material, and the time and effort are serious problems. Further, in the case of the master batch method, usually, about 1 to 5% by weight of the master batch pellets are added to the molding resin, but the added master batch pellets are scattered in the molding resin. In some cases, concentration unevenness due to poor mixing may occur.

【0004】上記のような粉末状添加剤やマスターバッ
チの問題点を解決したものが粒状添加剤である。例え
ば、着色剤に関して特公昭57−24810号公報や特
開平9−104759号公報に開示されたものがある。
この粒状添加剤は、有機・無機の染料・顔料、金属粉、
パールカラー、木紛、繊維の粉末、充填剤、発泡剤、難
燃剤、抗菌剤等の粉末状もしくはフレーク状の添加剤
を、分散剤、ワックス、粘結剤等をバインダーとして練
り合わせて粒状にしたものである。この粒状添加剤の場
合には、上記のような添加剤を分散剤等と練り合わせて
粒状にするだけの簡単な作業で製造することができ、マ
スターバッチに較べてはるかに製造が容易である。又、
近年、熱可塑性合成樹脂の成形に際しては、成形機の原
料投入口の上に自動計量混合機を設置し、原料と添加剤
との必要量を自動的に計量、混合して投入することで成
形工程の合理化が進められているが、粒状添加剤の場合
には粉末状添加剤に較べて上記のような自動計量機によ
る計量精度が非常に高く、しかも飛散による汚染の心配
もない。更に、この粒状添加剤の場合には、粒径が通常
0.1mm〜2mm程度とマスターバッチのペレットに
較べて小さいことから、成形用樹脂に添加した場合には
添加剤粒が樹脂全体に分散されて濃度の偏りといった問
題もない。
[0004] Granular additives have solved the above-mentioned problems of powdery additives and masterbatches. For example, there are colorants disclosed in JP-B-57-24810 and JP-A-9-104759.
This particulate additive includes organic and inorganic dyes and pigments, metal powder,
Powder or flake additives such as pearl color, wood powder, fiber powder, filler, foaming agent, flame retardant, antibacterial agent, etc. were kneaded into granules by using a dispersant, wax, binder, etc. as a binder. Things. In the case of this granular additive, it can be manufactured by a simple operation of kneading the above additive with a dispersant or the like and granulating it, and is much easier to manufacture than a master batch. or,
In recent years, when molding thermoplastic synthetic resins, an automatic weighing and mixing machine has been installed above the raw material input port of the molding machine, and the required amount of raw materials and additives has been automatically measured, mixed and injected. Although the process is being rationalized, in the case of granular additives, the accuracy of measurement by the above automatic weighing machine is extremely higher than that of powdery additives, and there is no risk of contamination due to scattering. Further, in the case of this granular additive, since the particle diameter is usually about 0.1 mm to 2 mm, which is smaller than that of the master batch pellets, when added to the molding resin, the additive particles are dispersed throughout the resin. Therefore, there is no problem such as uneven density.

【0005】上記のように粒状添加剤は、従来の粉末状
添加剤やマスターバッチ方式の欠点を解決した非常に優
れた性能を有する添加剤である。しかしながら、この粒
状添加剤の場合にも、その欠点として、自動計量機の貯
蔵タンクへ吸引方式、圧送方式等により移送する場合
に、移送用ホースや貯蔵タンク内が汚染されるという点
が指摘されている。例えば粒状着色剤の場合には、粉状
着色剤等とは異なり飛散による作業環境等の汚染の問題
はないが、粉末状着色剤をワックス等で練り合わせたも
のであることから、その組成がちょうどクレヨンのよう
なものであるため、移送用ホース内面や貯蔵タンク内壁
等の接触面がクレヨンを塗ったように汚染されるおそれ
がある。又、この粒状添加剤はバインダーとして分散剤
やワックス等を用いているため、移送時や貯蔵時に力が
加わると粒が破損して小片化し計量精度が低下するおそ
れがあるといった問題もある。このため、従来の粉末状
添加剤やマスターバッチに較べて前記のような数々の優
れた特性を有しているにもかかわらず、粒状添加剤の使
用は拡大していないのが現状である。
[0005] As described above, the particulate additive is an additive having extremely excellent performance which has solved the disadvantages of the conventional powdery additive and the master batch method. However, it has been pointed out that, even in the case of this granular additive, the transfer hose and the inside of the storage tank are contaminated when transferred to the storage tank of the automatic weighing machine by the suction method, the pressure feeding method, or the like. ing. For example, in the case of a granular colorant, unlike a powdery colorant, etc., there is no problem of contamination such as working environment due to scattering, but since the powdery colorant is kneaded with wax or the like, the composition is just Since it is like a crayon, the contact surfaces such as the inner surface of the transfer hose and the inner wall of the storage tank may be contaminated as if painted with crayon. In addition, since the granular additive uses a dispersant, wax, or the like as a binder, there is also a problem that if a force is applied during transfer or storage, the particles may be broken and become small pieces, thereby lowering the measurement accuracy. For this reason, the use of granular additives has not been expanded even though they have the above-mentioned many excellent properties as compared with conventional powdery additives and masterbatches.

【0006】[0006]

【発明が解決しようとする課題】本発明は上記のような
成形樹脂用の添加剤の問題点に鑑み、粉末状添加剤のよ
うな飛散による環境、作業者、成形機等への汚染がな
く、又、マスターバッチに較べて製造が簡単で、しかも
成形用樹脂に対する分散性もよく濃度分布の偏りといっ
た問題もない粒状着色剤を更に改良し、移送用ホース内
面や貯蔵タンク内壁等の接触面への汚染や、破損による
小片化等の問題を解決した優れた成形用の合成樹脂用添
加剤を提供せんとするものである。
SUMMARY OF THE INVENTION In view of the above-mentioned problems with the additives for molding resins, the present invention eliminates contamination of the environment, workers, molding machines, etc. due to scattering of powdery additives. In addition, the granular colorant, which is easier to manufacture than the masterbatch, has good dispersibility in the molding resin, and has no problem such as uneven concentration distribution, is further improved, and the contact surface such as the inner surface of the transfer hose or the inner wall of the storage tank is improved. It is an object of the present invention to provide an excellent additive for a synthetic resin for molding, which solves problems such as contamination of the resin and fragmentation due to breakage.

【0007】[0007]

【課題を解決するための手段】上記の目的を達成するた
め、本発明に係る合成樹脂用の粒状添加剤は、従来の粒
状添加剤の表面を熱可塑性合成樹脂被膜で被覆すること
により、移送用ホース内面や貯蔵タンク内壁といった接
触面の汚染及び移送時や貯蔵時の小片化を防止してなる
ものである。即ち、本発明に係る粒状添加剤は、合成樹
脂用の粉末状添加剤が粒状化された粒径0.1mm〜5
mmの添加剤粒に液状とした熱可塑性樹脂を加えて攪
拌、混合して添加剤粒の表面に付着させた液状熱可塑性
樹脂を固化させることにより添加剤粒の表面を熱可塑性
樹脂により被覆してなることを特徴とするものである。
In order to achieve the above object, the granular additive for a synthetic resin according to the present invention is transferred by coating the surface of a conventional granular additive with a thermoplastic synthetic resin film. This prevents contamination of the contact surfaces such as the inner surface of the storage hose and the inner wall of the storage tank, and the generation of small pieces during transfer and storage. That is, the granular additive according to the present invention has a particle size of 0.1 mm to 5 in which the powdery additive for a synthetic resin is granulated.
Add the liquid thermoplastic resin to the additive
Liquid thermoplastic mixed and mixed on the surface of additive granules
It is characterized in that the surface of the additive particles is coated with a thermoplastic resin by solidifying the resin .

【0008】又、本発明に係る合成樹脂用粒状添加剤の
製造方法は、粉末状添加剤を粒状化した添加剤粒に液状
とした熱可塑性樹脂を添加して攪拌、混合することで添
加剤粒の表面に前記液状熱可塑性樹脂を付着させるとと
もに、攪拌下に液状熱可塑性樹脂を固化させることで、
前記添加剤粒の表面を熱可塑性樹脂被膜により被覆する
というものである。
The method for producing a granular additive for a synthetic resin according to the present invention is characterized in that a liquid thermoplastic resin is added to additive granules obtained by granulating a powdery additive, followed by stirring and mixing. By attaching the liquid thermoplastic resin to the surface of the particles, and by solidifying the liquid thermoplastic resin under stirring,
The surface of the additive particles is covered with a thermoplastic resin film.

【0009】上記のような本発明の粒状添加剤は、その
表面が熱可塑性樹脂被膜により被覆されていることか
ら、移送用ホースや材料貯蔵タンク等の接触面を汚染す
るおそれがなく、又、前記被膜により添加剤粒が補強さ
れていて小片化も防止されることから、自動計量器等に
よる計量精度にも優れている。又、この粒状添加剤は、
公知の粒状添加剤に、液状にした熱可塑性樹脂を加えて
攪拌下で混合するとともに乾燥又は冷却するだけの極め
て簡単な作業により容易に製造することができる。
Since the surface of the granular additive of the present invention is coated with a thermoplastic resin film, there is no risk of contaminating contact surfaces such as a transfer hose and a material storage tank. Since the additive particles are reinforced by the coating and fragmentation is prevented, the measurement accuracy by an automatic measuring device or the like is excellent. Also, this granular additive
It can be easily produced by a very simple operation of adding a liquid thermoplastic resin to a known granular additive, mixing with stirring, and drying or cooling.

【0010】[0010]

【発明の実施の形態】本発明に係る粒状添加剤を、その
具体的製造方法とともに更に詳細に説明する。本発明の
対象となる合成樹脂用の添加剤の種類には特に限定はな
く、例えば、着色剤、改質剤、安定剤、抗酸化剤、紫外
線吸収剤、難燃剤、充填剤、発泡剤、帯電防止剤、抗菌
剤等、各種のものが挙げられ、粉末状の原料であればい
かなるものでもよく、又、複数の添加剤を併用してもよ
い。但し、粒状化や樹脂被膜による被覆に際しては添加
剤成分の変質等に留意して、その方法、条件等、例えば
被覆用樹脂を溶解した溶剤の種類や被覆用樹脂の加熱溶
融温度条件等に配慮する必要がある。
BEST MODE FOR CARRYING OUT THE INVENTION The granular additive according to the present invention will be described in more detail together with a specific production method. There are no particular limitations on the type of additive for the synthetic resin that is the subject of the present invention, for example, colorants, modifiers, stabilizers, antioxidants, ultraviolet absorbers, flame retardants, fillers, foaming agents, Examples include various substances such as an antistatic agent and an antibacterial agent. Any material may be used as long as it is a powdery material, and a plurality of additives may be used in combination. However, when granulating or coating with a resin film, pay attention to the deterioration of the additive components, etc., and consider the method and conditions, such as the type of solvent in which the coating resin is dissolved, the heating and melting temperature conditions of the coating resin, etc. There is a need to.

【0011】この粒状添加剤を製造するには、先ず、第
1工程で上記のような粉末状の各種添加剤から添加剤粒
を作製する。この添加剤粒の作製方法は、上記のような
合成樹脂用の粉末状添加剤を分散剤、ワックス、粘結
剤、油剤、熱可塑性樹脂等をバインダーとして練り合わ
せて粒状化するだけで得られる。具体的には、例えば上
記のような粉末状添加剤に分散剤を加えて混合機で混合
し、混合時の摩擦熱により分散剤を溶融させることで粒
状化することできる。前記分散剤は、従来より一般に使
用されているものであり、例えば、金属石鹸、高級脂肪
酸、界面活性剤、低分子量樹脂等の1種、又は2種以上
を組み合わせて使用することができる。更に、上記粉末
状添加剤と分散剤との合計量100重量部に対し、1〜
10重量部程度の熱可塑性樹脂、又は熱硬化性樹脂を硬
化剤を併用することなく粘着剤として添加することがで
きる。粘着剤を使用する場合にあっては、粉末状の添加
剤成分に、分散剤及び粘着剤を加えて混合機で混合する
ことで粒状化する。この場合は、粉末状添加剤と分散剤
とを混合し、充分摩擦熱が上昇しない時点で粘着剤を添
加して更に混合することが好ましい。前記粘着剤として
の熱可塑性樹脂は、融点が150℃以下で、軟質ゴム状
の被膜を形成しうるものが好ましい。例えば、酢酸ビニ
ル樹脂、ブタジエン樹脂、低分子量のポリエチレン樹
脂、EVA樹脂、アクリル樹脂、石油樹脂、マレイン酸
樹脂、ポリビニルブチラール(PVB)、ポリビニルホ
ルマール(PVFM)、アイオノマー樹脂等が粘着剤と
して挙げられるが、これらに限定されるものではない。
また、例えばエポキシ樹脂等の熱硬化性樹脂を硬化剤を
併用することなく粘着剤として使用することもできる。
上記のようにして得られる粒状物の粒径は、0.1mm
〜5mmの範囲とすることが好ましい。
In order to produce this granular additive, first, in the first step, additive granules are prepared from the above-mentioned various powdery additives. The method for producing the additive particles can be obtained simply by kneading the powdery additive for a synthetic resin as described above with a dispersant, a wax, a binder, an oil agent, a thermoplastic resin, or the like as a binder and granulating them. Specifically, for example, a granule can be formed by adding a dispersant to the above-mentioned powdery additive, mixing the mixture with a mixer, and melting the dispersant by frictional heat during mixing. The dispersant is conventionally used in general, and may be used alone or in combination of two or more of metal soap, higher fatty acid, surfactant, low molecular weight resin and the like. Furthermore, 1 to 100 parts by weight of the total amount of the powdery additive and the dispersant, 1 to
About 10 parts by weight of a thermoplastic resin or a thermosetting resin can be added as an adhesive without using a curing agent together. When an adhesive is used, a dispersant and an adhesive are added to a powdery additive component, and the mixture is granulated by mixing with a mixer. In this case, it is preferable that the powdery additive and the dispersant are mixed, and the adhesive is further added and mixed when the frictional heat does not sufficiently increase. The thermoplastic resin as the pressure-sensitive adhesive preferably has a melting point of 150 ° C. or less and can form a soft rubber-like film. Examples of the adhesive include vinyl acetate resin, butadiene resin, low molecular weight polyethylene resin, EVA resin, acrylic resin, petroleum resin, maleic resin, polyvinyl butyral (PVB), polyvinyl formal (PVFM), and ionomer resin. However, the present invention is not limited to these.
Further, a thermosetting resin such as an epoxy resin can be used as the pressure-sensitive adhesive without using a curing agent together.
The particle size of the granular material obtained as described above is 0.1 mm
It is preferable to set the range to 5 mm.

【0012】また、上記添加剤粒は、着色剤について特
開平9−104759号公報や特公昭57−24810
号公報等に開示された方法等、公知の方法により作製す
ることもできる。
The above-mentioned additive particles are described in JP-A-9-104759 and JP-B-57-24810.
It can also be produced by a known method such as the method disclosed in Japanese Patent Application Publication No.

【0013】前記特開平9−104759号公報記載の
方法による粉末状添加剤の粒状化は、粉末状の添加剤成
分に、核となる熱可塑性樹脂粉末及びバインダーとなる
熱可塑性樹脂や分散剤等を加えて混合機で混合すること
で混合時の摩擦熱により前記熱可塑性樹脂や分散剤等の
バインダーを溶融させ、前記熱可塑性樹脂粉末の粒子表
面に、溶融した熱可塑性樹脂や分散剤等のバインダーに
より粉末状添加剤を固着する。核となる熱可塑性樹脂粉
末粒子の粒径は5〜100メッシュ程度が好ましいが、
5〜20メッシュ、20〜50メッシュ、50〜100
メッシュといった具合に、粒径の差が少ないもの、即
ち、粒度分布が狭く粒径が均一なものを用いることが、
均一な粒径の添加剤粒を得るうえで好ましい。核となる
合成樹脂粉末の樹脂の種類としては、本発明の粒状添加
剤を添加する対象となる成形用熱可塑性樹脂の粉末、あ
るいは、それらと相溶性を有する熱可塑性樹脂の粉末を
使用することが好ましく、例えば、ポリエチレン、ポリ
プロピレン、ポリスチレン、ハイインパクトポリスチレ
ン、ABS樹脂、アクリル樹脂、ポリカーボネート、ポ
リ塩化ビニル、ポリアミド(ナイロン)樹脂、クマロン
樹脂、石油樹脂、テルペン系樹脂、ポリビニルブチラー
ル(PVB)、ポリビニルホルマール(PVFM)等が
挙げられるが、これらに限定されるものではない。但
し、前記核となる合成樹脂は、添加剤成分やバインダー
としての熱可塑性樹脂や分散剤等との混合時の摩擦熱に
より溶融しない軟化点を有することが必要であり、15
0℃以上の軟化点を有するものが好ましい。又、前記分
散剤としては、例えば、金属石鹸、高級脂肪酸、界面活
性剤、低分子量樹脂等の1種、又は2種以上を組み合わ
せて使用することができる。核となる熱可塑性樹脂粉末
の配合割合は、粉末状添加剤と分散剤との合計量に対し
て30〜70重量部の範囲であることが好ましい。更
に、上記粉末状添加剤と分散剤との合計量100重量部
に対し、1〜10重量部程度の粘結剤を添加することが
できる。粘結剤を使用する場合にあっては、粉末状の添
加剤成分に、核となる熱可塑性樹脂粉末及び分散剤を加
えて混合機で混合し、更に、粘結剤を添加して混合する
ことで、熱可塑性樹脂粉末の表面に前記粉末状添加剤を
固着させる。この場合は、粉末状添加剤と分散剤とを混
合し、充分摩擦熱が上昇しない時点で粘結剤を添加して
更に混合することが好ましい。前記粘結剤は、熱可塑性
樹脂であり、融点が150℃以下で、軟質ゴム状の被膜
を形成しうるものが好ましい。例えば、酢酸ビニル樹
脂、ブタジエン樹脂、低分子量のポリエチレン樹脂、E
VA樹脂、石油樹脂、マレイン酸樹脂、ポリビニルブチ
ラール(PVB)、ポリビニルホルマール(PVF
M)、アイオノマー樹脂等が粘結剤として挙げられる
が、これらに限定されるものではない。これに更に可塑
剤を少量添加すると、より好ましい結果となる。上記の
ようにして得られる粒状物の粒径は、0.1mm〜5m
mの範囲とすることが好ましい。
The granulation of the powdery additive by the method described in JP-A-9-104759 is carried out by adding a powdery additive component to a thermoplastic resin powder serving as a core and a thermoplastic resin or a dispersant serving as a binder. The binder such as the thermoplastic resin or the dispersant is melted by frictional heat at the time of mixing by adding and mixing with a mixer, and the surface of the particles of the thermoplastic resin powder, such as the melted thermoplastic resin or the dispersant. The powdery additive is fixed by the binder. The particle diameter of the core thermoplastic resin powder particles is preferably about 5 to 100 mesh,
5-20 mesh, 20-50 mesh, 50-100
In a condition such as a mesh, a material having a small difference in particle size, that is, a material having a narrow particle size distribution and a uniform particle size,
This is preferable for obtaining additive particles having a uniform particle size. As the kind of resin of the core synthetic resin powder, use is made of a molding thermoplastic resin powder to which the granular additive of the present invention is added, or a thermoplastic resin powder having compatibility with them. Preferred are, for example, polyethylene, polypropylene, polystyrene, high impact polystyrene, ABS resin, acrylic resin, polycarbonate, polyvinyl chloride, polyamide (nylon) resin, cumarone resin, petroleum resin, terpene resin, polyvinyl butyral (PVB), polyvinyl Examples include, but are not limited to, formal (PVFM). However, it is necessary that the core synthetic resin has a softening point that does not melt due to frictional heat when mixed with a thermoplastic resin or a dispersant as an additive component or a binder.
Those having a softening point of 0 ° C. or higher are preferred. Further, as the dispersant, for example, one or a combination of two or more of metal soap, higher fatty acid, surfactant, and low molecular weight resin can be used. The mixing ratio of the thermoplastic resin powder serving as the core is preferably in the range of 30 to 70 parts by weight based on the total amount of the powdery additive and the dispersant. Further, about 1 to 10 parts by weight of a binder can be added to 100 parts by weight of the total amount of the powdery additive and the dispersant. In the case of using a binder, a powdery additive component, a thermoplastic resin powder serving as a core and a dispersant are added and mixed with a mixer, and further, a binder is added and mixed. Thus, the powdery additive is fixed on the surface of the thermoplastic resin powder. In this case, it is preferable that the powdery additive and the dispersant are mixed, and the binder is further added and mixed at the time when the frictional heat does not sufficiently increase. The binder is preferably a thermoplastic resin having a melting point of 150 ° C. or lower and capable of forming a soft rubber-like film. For example, vinyl acetate resin, butadiene resin, low molecular weight polyethylene resin, E
VA resin, petroleum resin, maleic acid resin, polyvinyl butyral (PVB), polyvinyl formal (PVF)
M), an ionomer resin and the like can be mentioned as binders, but are not limited to these. If a small amount of a plasticizer is further added thereto, a more preferable result is obtained. The particle size of the granular material obtained as described above is 0.1 mm to 5 m.
m.

【0014】また、前記特公昭57−24810号公報
記載の方法による粉末状添加剤の粒状化は、粉末状添加
剤又はその混合物に、金属石鹸、ポリエチレンワック
ス、ポリプロピレンワックス、グリセリン脂肪酸エステ
ル又は樹脂類を添加して加熱し、溶融、混練した後、冷
却、固化し、この固形物を粉砕することで粒状化する。
前記金属石鹸としては、ステアリン酸カルシウム、ステ
アリン酸マグネシウム、ステアリン酸亜鉛、ラウリン酸
バリウム、ラウリン酸ストロンチウム等が挙げられる
が、これらに限定されるものではない。又、前記ポリエ
チレンワックスは、平均分子量が1500〜10000
程度の低分子量ポリエチレンであり、好ましくは平均分
子量が約2000のポリエチレンである。更に、前記グ
リセリン脂肪酸エステルは、グリセリンと、例えば、パ
ルミチン酸、ステアリン酸、オレイン酸等の炭素数8〜
22の脂肪酸とのエステルが好ましい。前記ポリエチレ
ンワックスやグリセリン脂肪酸エステル等の配合量は、
粉末状添加剤に対して15〜70重量%程度である。混
練は、三本ロール、ニーダー等の公知の混練機を用い、
例えば110〜150℃の温度で5〜15分間程度溶
融、混練する。次いで、この溶融物を冷却して好ましく
はフレーク状に固化し、固化物をアトマイザー等の公知
の粉砕機により粉砕することで添加剤粒を得る。この場
合、粉砕された添加剤粒の粒径は0.1mm〜5mmの
範囲とすることが好ましい。
The granulation of the powdery additive by the method described in JP-B-57-24810 is carried out by adding metal soap, polyethylene wax, polypropylene wax, glycerin fatty acid ester or resin to the powdery additive or a mixture thereof. Is added, heated, melted and kneaded, then cooled and solidified, and the solid is ground to be granulated.
Examples of the metal soap include, but are not limited to, calcium stearate, magnesium stearate, zinc stearate, barium laurate, and strontium laurate. The polyethylene wax has an average molecular weight of 1500 to 10,000.
It is a low molecular weight polyethylene of the order of magnitude, preferably polyethylene having an average molecular weight of about 2000. Further, the glycerin fatty acid ester is combined with glycerin, for example, having 8 to 8 carbon atoms such as palmitic acid, stearic acid, and oleic acid.
Esters with 22 fatty acids are preferred. The compounding amount of the polyethylene wax or glycerin fatty acid ester,
It is about 15 to 70% by weight based on the powdery additive. Kneading, using a known kneader such as a three-roll, kneader,
For example, melting and kneading at a temperature of 110 to 150 ° C. for about 5 to 15 minutes. Next, the melt is cooled and solidified, preferably in the form of flakes, and the solid is pulverized by a known pulverizer such as an atomizer to obtain additive particles. In this case, the particle size of the pulverized additive particles is preferably in the range of 0.1 mm to 5 mm.

【0015】一方、上記添加剤粒の作製とは別に、被膜
用の液状熱可塑性樹脂を調製する。この被膜用の熱可塑
性樹脂としては、常温では固形状態にあり、溶剤に溶解
するか、又は加熱することにより溶融して液状となるも
のを用いることが条件となる。
On the other hand, apart from the preparation of the additive particles, a liquid thermoplastic resin for a film is prepared. As the thermoplastic resin for the coating film, a resin that is in a solid state at normal temperature and is dissolved in a solvent or melted by heating to be in a liquid state is used.

【0016】前記溶剤に溶解した熱可塑性樹脂溶液を用
いる場合には、樹脂溶液を添加剤粒に加えて攪拌、混合
して添加剤粒表面に樹脂溶液を付着させるとともに攪拌
下に乾燥して溶剤を除去することで熱可塑性樹脂を固化
させて、添加剤粒の表面を熱可塑性樹脂被膜により被覆
する。又、加熱溶融して液状とした熱可塑性樹脂を用い
る場合には、添加剤粒に、加熱溶融した液状の熱可塑性
樹脂を加えて攪拌、混合して添加剤粒表面に液状樹脂を
付着させるとともに攪拌下に冷却して熱可塑性樹脂を固
化させることで、添加剤粒表面を熱可塑性樹脂被膜によ
り被覆する。この場合の被覆樹脂量は0.1重量%〜5
重量%が好ましく、0.3重量%〜1重量%がより好ま
しい。
In the case of using a thermoplastic resin solution dissolved in the above-mentioned solvent, the resin solution is added to the additive particles, and the mixture is stirred and mixed to adhere the resin solution to the surface of the additive particles and dried under stirring to remove the solvent. Is removed to solidify the thermoplastic resin, and the surfaces of the additive particles are covered with the thermoplastic resin film. In addition, when using a thermoplastic resin which is heated and melted into a liquid state, the additive melt is added with the heat-melted liquid thermoplastic resin, and stirred and mixed to adhere the liquid resin to the additive particle surface. By cooling under stirring and solidifying the thermoplastic resin, the surface of the additive particles is covered with the thermoplastic resin film. In this case, the amount of the coating resin is 0.1% by weight to 5%.
% By weight, more preferably 0.3% to 1% by weight.

【0017】上記のように添加剤粒の表面を熱可塑性樹
脂被膜で被覆する具体的方法としては、混合機に添加剤
粒を投入し、攪拌しながら上記のような液状熱可塑性樹
脂を添加することで添加剤粒の表面に樹脂液を付着させ
た後、攪拌状態のままで熱風又は冷風を吹き付けること
で樹脂溶液の溶剤を揮散させ、あるいは溶融状態にある
熱可塑性樹脂を冷却固化することにより、添加剤粒の表
面に熱可塑性樹脂被膜を形成して、本発明の粒状添加剤
を得る。
As a specific method of coating the surface of the additive particles with the thermoplastic resin film as described above, the additive particles are charged into a mixer and the above-mentioned liquid thermoplastic resin is added with stirring. After attaching the resin liquid to the surface of the additive particles by spraying hot or cold air while stirring, the solvent of the resin solution is volatilized, or the thermoplastic resin in the molten state is cooled and solidified. Then, a thermoplastic resin film is formed on the surface of the additive particles to obtain the granular additive of the present invention.

【0018】上記添加剤粒の表面への熱可塑性樹脂被膜
形成時に使用する混合機としては、例えば図1に示すよ
うな鍋底式の混合槽1を備えるものを用いることが、混
合時に混合槽1内に死角ができて混合不良が発生すると
いったことがないことから好ましい。又、混合羽根2を
備える場合には、その回転速度が速すぎると混合される
添加剤粒が粉末化してしまうおそれがあることから、毎
分100〜300回程度の比較的低い回転速度で攪拌す
ることが好ましい。又、混合槽を縦にして、該槽自体を
回転させるような構造の混合機を用いることもできる。
この場合の回転速度は毎分100回前後でよい。これ
は、混合槽で添加剤粒に被覆用樹脂液を添加して混合す
るとき、回転速度が速すぎると添加剤粒が粉末化してし
まうおそれがあること、混合槽を回転させて乾燥する場
合は蓋をすることなく冷却されやすい状態で回転させる
ことから、高速で混合槽を回転させると混合物が槽外へ
飛散してしまうおそれがあること、更に、混合槽の回転
速度が速すぎる場合には、混合槽とその内容物とが一体
に回転してしまい混合ができなくなるためである。尚、
この混合槽自体を回転させる場合は、混合羽根はあって
もなくてもよい。
As the mixer used for forming the thermoplastic resin film on the surface of the additive particles, for example, a mixer having a pan bottom type mixing tank 1 as shown in FIG. 1 is used. This is preferable because there is no possibility that a mixing error occurs due to the formation of a blind spot inside. When the mixing blade 2 is provided, if the rotation speed is too high, the additive particles to be mixed may be powdered. Therefore, stirring is performed at a relatively low rotation speed of about 100 to 300 times per minute. Is preferred. Further, a mixer having a structure in which the mixing tank is vertically set and the tank itself is rotated can be used.
The rotation speed in this case may be around 100 times per minute. This is because, when the coating resin liquid is added to the additive particles in the mixing tank and mixed, if the rotation speed is too high, the additive particles may be powdered, and the mixing tank is rotated and dried. Is rotated in a state where it is easy to cool without a lid, so that if the mixing tank is rotated at high speed, the mixture may be scattered outside the tank, and furthermore, if the rotation speed of the mixing tank is too fast This is because the mixing tank and its contents rotate integrally and cannot be mixed. still,
When the mixing tank itself is rotated, the mixing blade may or may not be provided.

【0019】前記被膜形成用の熱可塑性樹脂としては、
本発明の粒状添加剤を添加する対象となる成形用熱可塑
性樹脂と同種の樹脂、あるいは、それらと相溶性を有す
る熱可塑性樹脂が好ましく、例えば、スチレン系樹脂、
アクリル系樹脂、クマロン系樹脂、インデン樹脂、石油
樹脂、テルペン系樹脂、エチレン・酢酸ビニルコポリマ
ー(EVA)、塩素化ポリプロピレン、ポリブタジエン
系樹脂、ポリビニルブチラール(PVB)、ポリビニル
ホルマール樹脂(PVFM)、ウレタンエラストマー、
スチレンエラストマー等の低分子量樹脂、共重合体、複
合物等が挙げられるがこれらに限定されるものではな
い。本発明では、前記のような熱可塑性樹脂を溶剤に溶
解するか、あるいは加熱溶融して液状として用いる。
As the thermoplastic resin for forming the film,
A resin of the same type as the thermoplastic resin for molding to which the granular additive of the present invention is added, or a thermoplastic resin having compatibility with them is preferable, for example, a styrene-based resin,
Acrylic resin, coumarone resin, indene resin, petroleum resin, terpene resin, ethylene / vinyl acetate copolymer (EVA), chlorinated polypropylene, polybutadiene resin, polyvinyl butyral (PVB), polyvinyl formal resin (PVFM), urethane elastomer ,
Examples include, but are not limited to, low molecular weight resins such as styrene elastomers, copolymers, and composites. In the present invention, the above-described thermoplastic resin is dissolved in a solvent or heated and melted to be used as a liquid.

【0020】前記溶剤に溶解して液状として使用するに
好ましい熱可塑性樹脂としては、ポリスチレン、アクリ
ロニトリル・スチレン樹脂(AS)、アクリル樹脂、ア
クリロニトリル・ブタジエン・スチレン樹脂(AB
S)、クマロン・インデン樹脂、酢酸ビニル樹脂、ナイ
ロン樹脂、ポリ塩化ビニル(PVC)などが挙げられる
が、これらに限定されるものではない。又、この熱可塑
性樹脂を溶解する溶剤としては、炭化水素系、アルコー
ル系、エステル及びエーテル系、ケトン系、塩化炭化水
素系等が挙げられるが、これらに限定されるものではな
く、一般的に知られているものを用いることができ、ま
た2種以上の溶剤を混合して使用することもできる。こ
の場合の熱可塑性樹脂溶液の濃度としては、5〜50重
量%の範囲、更には10〜30重量%とすることが好ま
しく、またその溶液の粘度は1800cps以下、更に
はより低粘度とすることが作業上の観点から好ましい。
Preferred thermoplastic resins to be used as a liquid after being dissolved in the solvent include polystyrene, acrylonitrile / styrene resin (AS), acrylic resin, acrylonitrile / butadiene / styrene resin (AB)
S), coumarone-indene resin, vinyl acetate resin, nylon resin, polyvinyl chloride (PVC) and the like, but are not limited thereto. Examples of the solvent for dissolving the thermoplastic resin include hydrocarbons, alcohols, esters and ethers, ketones, and chlorinated hydrocarbons, but are not limited thereto. Known ones can be used, and two or more kinds of solvents can be mixed and used. In this case, the concentration of the thermoplastic resin solution is preferably in the range of 5 to 50% by weight, more preferably 10 to 30% by weight, and the viscosity of the solution is 1800 cps or less, and further lower viscosity. Is preferred from the viewpoint of work.

【0021】又、前記加熱して液状となる樹脂として
は、添加剤粒の分散剤、ワックス、粘結剤などのバイン
ダー成分が溶解しないような温度で溶融させて被覆可能
とするという観点から、常温で固形であり50〜100
℃程度の温度で溶融して液状となるものが好ましく、よ
り好ましくは60〜90℃の温度で溶融により液状とな
るものが好ましい。この加熱溶融して液状として使用す
るに好ましい熱可塑性樹脂としては、クマロン・インデ
ン樹脂、アイオノマー樹脂、石油樹脂、ポリ酢酸ビニル
樹脂、ポリエチレンオキサイド(PEO)等が挙げられ
るが、これらに限定されるものではない。又、この加熱
溶融した熱可塑性樹脂の粘度としては1800cps以
下とすることが好ましく、出来る限り粘度の低い液状と
することが作業上好ましい。
The resin which becomes liquid upon heating may be coated at a temperature at which a binder component such as a dispersant of additive particles, a wax or a binder is not melted so that the resin can be coated. Solid at room temperature and 50-100
It is preferable that the material melts at a temperature of about ℃ and becomes liquid, more preferably the material which melts at a temperature of 60 to 90 ° C. Preferred thermoplastic resins for use as a liquid by heating and melting include, but are not limited to, coumarone-indene resin, ionomer resin, petroleum resin, polyvinyl acetate resin, polyethylene oxide (PEO), and the like. is not. The viscosity of the heat-melted thermoplastic resin is preferably 1800 cps or less, and it is preferable in terms of work to make the viscosity as low as possible.

【0022】上記のような液状の熱可塑性樹脂により添
加剤粒の表面に形成される樹脂被膜の膜厚としては、5
〜30μmの範囲、更には10〜20μmの範囲とする
ことが好ましく、又、添加剤粒の重量に対する樹脂被膜
の重量は0.1〜5重量%、更には0.3〜1重量%と
することが好ましい。樹脂被膜の膜厚が前記の範囲以下
では被覆が十分でなく、また前記範囲以上の被覆は不必
要である。
The thickness of the resin film formed on the surface of the additive particles by the liquid thermoplastic resin as described above is 5
It is preferably in the range of 30 to 30 μm, more preferably in the range of 10 to 20 μm, and the weight of the resin coating is 0.1 to 5% by weight, more preferably 0.3 to 1% by weight, based on the weight of the additive particles. Is preferred. When the thickness of the resin film is less than the above range, the coating is not sufficient, and the coating over the above range is unnecessary.

【0023】前記被覆用熱可塑性樹脂の具体的選定にあ
たっては、成形用樹脂と相溶性がよく、物性劣化等を起
こすことがなく、又、成形用樹脂に対する分散不良を起
こさないものを選定する必要がある。従って、添加する
成形用樹脂の種類により好ましい樹脂の種類が異なり、
又、成形用樹脂の種類もスチレン系樹脂、オレフィン系
樹脂、ポリアミド樹脂(ナイロン系樹脂)、塩化ビニル
樹脂等、多岐にわたるため一概には規定できない。好ま
しい組み合わせを、いくつか例示するならば、例えば、
成型用樹脂がスチレン系樹脂の場合の被覆用熱可塑性樹
脂としては、ポリスチレン、ABS、AS、クマロン・
インデン樹脂、石油樹脂等、成形用樹脂がオレフィン系
樹脂の場合の被覆用熱可塑性樹脂としてはアイオノマー
樹脂、PVB、PVFM、塩素化ポリエチレン等、成形
用樹脂がポリアミド樹脂の場合の被覆用熱可塑性樹脂と
してはナイロン612、8ナイロン、アルコール可溶ポ
リアミド等、成形用樹脂が塩化ビニル樹脂の場合の被覆
用熱可塑性樹脂としてはポリ塩化ビニル、MBS、AB
S、アクリル樹脂、塩素化ポリエチレン等が好ましいも
のとして挙げられるが、これらの組み合わせに限定され
るものではない。
In selecting the above-mentioned thermoplastic resin for coating, it is necessary to select a thermoplastic resin which has good compatibility with the molding resin, does not cause deterioration in physical properties, and does not cause poor dispersion to the molding resin. There is. Therefore, the preferred type of resin differs depending on the type of molding resin to be added,
In addition, the types of molding resins cannot be unequivocally specified because they vary widely, such as styrene resins, olefin resins, polyamide resins (nylon resins), and vinyl chloride resins. To illustrate some preferred combinations, for example,
When the molding resin is a styrene resin, the coating thermoplastic resin may be polystyrene, ABS, AS, Coumarone,
Thermoplastic resins for coating when the molding resin is an olefin resin, such as indene resin and petroleum resin, such as ionomer resin, PVB, PVFM, and chlorinated polyethylene. Nylon 612, 8 nylon, alcohol-soluble polyamide, etc., and when the molding resin is a vinyl chloride resin, the coating thermoplastic resin is polyvinyl chloride, MBS, AB
S, acrylic resin, chlorinated polyethylene and the like are preferred, but are not limited to these combinations.

【0024】本発明の粒状添加剤が適用される成形用熱
可塑性樹脂としては、例えば、ポリスチレン(PS)、
ハイインパクトポリスチレン(HIPS)、アクリロニ
トリル・スチレン樹脂(AS)、アクリロニトリル・ブ
タジエン・スチレン樹脂(ABS)等のスチレン系樹
脂、ポリエチレン(PE)、ポリプロピレン(PP)、
エチレン・酢酸ビニルコポリマー(EVA)等のオレフ
ィン系樹脂、その他、アクリル樹脂、ポリアミド樹脂、
ポリブチレンテレフタレート(PBT)、ポリエチレン
テレフタレート(PET)、ポリカーボネート(PC)
等が挙げられるが、これらに限定されるものではない。
The thermoplastic resin for molding to which the granular additive of the present invention is applied includes, for example, polystyrene (PS),
Styrene resins such as high impact polystyrene (HIPS), acrylonitrile / styrene resin (AS), acrylonitrile / butadiene / styrene resin (ABS), polyethylene (PE), polypropylene (PP),
Olefin resins such as ethylene / vinyl acetate copolymer (EVA), other acrylic resins, polyamide resins,
Polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polycarbonate (PC)
And the like, but are not limited thereto.

【0025】そして、上記のような成形用熱可塑性樹脂
の粉末やペレット等に、本発明の粒状添加剤を添加、混
合し、これを成形することで、合成樹脂製品を得ること
ができる。この場合の成形方法としては、射出成形法、
押出成形法、中空成形法、カレンダー成形法その他の公
知の成形法をいずれも採用することができる。尚、成形
にあたって、他の添加剤を併用することができることは
もちろんである。
Then, the granular additive of the present invention is added to powder or pellets of the thermoplastic resin for molding as described above, mixed, and molded, whereby a synthetic resin product can be obtained. In this case, an injection molding method,
Any known molding method such as an extrusion molding method, a hollow molding method, a calendar molding method and the like can be adopted. In addition, it goes without saying that other additives can be used in combination during molding.

【0026】[0026]

【実施例】次に実施例を挙げて本発明を具体的に説明す
るが、これらの実施例は何ら本発明を制限するものでは
ない。
EXAMPLES Next, the present invention will be specifically described with reference to examples, but these examples do not limit the present invention at all.

【0027】[添加剤粒A1〜A5の製造]表1〜5に
示すような配合により、着色剤等の添加剤と、分散剤
と、粘着剤とからなる原料を、混合羽根が多段で、回転
速度1800rpmの高速ミキサー(涛和化学株式会社
製)に投入し、10〜15分間混合したところ、混合羽
根と前記原料との摩擦熱により内部温度が約120℃に
上昇し、分散剤及び粘着剤が溶融し、ほぼ粒度の揃った
添加剤粒を得た。この添加剤粒を、下段が0.5mm、
上段が4mmの二段篩で不良品(粒度の不揃い)を分離
し、添加剤粒A1〜A5を得た。
[Production of Additive Particles A1 to A5] By mixing as shown in Tables 1 to 5, a raw material composed of an additive such as a colorant, a dispersant, and an adhesive is mixed in a multistage mixing blade. The mixture was put into a high-speed mixer (manufactured by Towa Kagaku Co., Ltd.) having a rotation speed of 1800 rpm and mixed for 10 to 15 minutes. The agent melted to obtain additive particles having a substantially uniform particle size. This additive granule, the lower stage is 0.5 mm,
Defective products (irregularity of particle size) were separated by a two-stage sieve having an upper stage of 4 mm to obtain additive particles A1 to A5.

【0028】[0028]

【表1】 [Table 1]

【0029】[0029]

【表2】 [Table 2]

【0030】[0030]

【表3】 [Table 3]

【0031】[0031]

【表4】 [Table 4]

【0032】[0032]

【表5】 [Table 5]

【0033】[添加剤粒A6の製造]表6に示す配合に
より、添加剤と、分散剤と、核剤とからなる原料を、混
合羽根が多段で、回転速度1800rpmの高速ミキサ
ー(涛和化学株式会社製)に投入し、約15分間混合し
たところ、混合羽根と前記原料との摩擦熱により内部温
度が約120℃に上昇し、分散剤が溶融し、核剤として
の粉末樹脂の粒子表面に分散剤により粉末状添加剤が固
着した、ほぼ粒度の揃った添加剤粒を得た。この添加剤
粒を、下段が0.5mm、上段が3mmの二段篩で不良
品(粒度の不揃い)を分離し、添加剤粒A6を得た。
[Production of Additive Particle A6] According to the composition shown in Table 6, a raw material consisting of an additive, a dispersant, and a nucleating agent was mixed with a high-speed mixer (Towa Chemical Co., Ltd.) having a multistage mixing blade and a rotation speed of 1800 rpm. And mixed for about 15 minutes, the internal temperature rises to about 120 ° C. due to frictional heat between the mixing blade and the raw material, the dispersant is melted, and the particle surface of the powder resin as a nucleating agent The powdery additives were fixed by the dispersant to obtain additive particles having substantially uniform particle size. Defective products (irregular particle size) were separated from the additive particles by a two-stage sieve having a lower stage of 0.5 mm and an upper stage of 3 mm to obtain additive particles A6.

【0034】[0034]

【表6】 [Table 6]

【0035】尚、以上で使用した原料を表7に示す。The raw materials used above are shown in Table 7.

【0036】[0036]

【表7】 [Table 7]

【0037】[被覆用熱可塑性樹脂溶液B1〜B4の調
製]表8〜11に示す各配合成分を混合して被覆用熱可
塑性樹脂溶液B1〜B4を調製した。尚、使用した熱可
塑性樹脂を表12に示す。
[Preparation of Coating Thermoplastic Resin Solutions B1 to B4] Each of the components shown in Tables 8 to 11 was mixed to prepare coating thermoplastic resin solutions B1 to B4. Table 12 shows the thermoplastic resins used.

【0038】[0038]

【表8】 [Table 8]

【0039】[0039]

【表9】 [Table 9]

【0040】[0040]

【表10】 [Table 10]

【0041】[0041]

【表11】 [Table 11]

【0042】[0042]

【表12】 [Table 12]

【0043】[被覆用熱可塑性樹脂液B5の調製]クマ
ロン・インデン樹脂(新日鉄化学(株)製、日鉄クマロ
ンG−75;融点71〜80℃)を100℃で加熱溶融
して被覆用熱可塑性樹脂液B5とした。
[Preparation of Thermoplastic Resin Liquid B5 for Coating] Coumarone-indene resin (Nippon Steel Chemical Co., Ltd., Nippon Steel Coumalon G-75; melting point: 71-80 ° C.) was heated and melted at 100 ° C. This was called a plastic resin liquid B5.

【0044】(実施例1〜6)図1に示すような混合機
(混合槽1の直径:17cm、深さ:17cm、1.5
kwのモータ)を使用し、表13に示す組み合わせによ
り、添加剤粒1kgに対し、被覆用熱可塑性樹脂溶液を
5重量%を添加し、2分間混合した後、80℃の熱風を
吹き付けながら攪拌を継続し、約5分後、溶剤が除去さ
れたことを確認し、混合機を停止して、表面が熱可塑性
樹脂被膜で被覆された実施例1〜6の粒状添加剤を取り
出した。
(Examples 1 to 6) Mixer as shown in FIG. 1 (diameter of mixing tank 1: 17 cm, depth: 17 cm, 1.5
Using a kW motor), 5% by weight of the coating thermoplastic resin solution was added to 1 kg of the additive particles according to the combinations shown in Table 13 and mixed for 2 minutes, followed by stirring while blowing hot air at 80 ° C. After about 5 minutes, it was confirmed that the solvent had been removed, the mixer was stopped, and the granular additives of Examples 1 to 6 whose surfaces were coated with the thermoplastic resin film were taken out.

【0045】[0045]

【表13】 [Table 13]

【0046】(実施例7)添加剤粒(A2)1kgを図
1に示す混合機のナベ底型混合槽1に投入し、毎分30
0回転の回転速度で混合しながら85℃の熱風を吹き付
けて添加剤粒を加温し、約2分で約75℃にまで昇温さ
せた。更に攪拌を続けながら上記被覆用熱可塑性樹脂液
B5を8g投入し、攪拌しながら常温(23℃)の風を
吹き付け、約3分間混合して、添加剤粒の表面が熱可塑
性樹脂により被覆された実施例7の粒状添加剤を得た。
(Example 7) 1 kg of additive particles (A2) was put into the pan bottom mixing tank 1 of the mixer shown in FIG.
The additive particles were heated by blowing hot air at 85 ° C. while mixing at a rotation speed of 0 rotation, and the temperature was increased to about 75 ° C. in about 2 minutes. 8 g of the above-mentioned thermoplastic resin liquid B5 for coating is added while stirring is further continued, and air at normal temperature (23 ° C.) is blown while stirring and mixed for about 3 minutes, so that the surface of the additive particles is coated with the thermoplastic resin. Thus, a granular additive of Example 7 was obtained.

【0047】[汚染試験]上記実施例1〜7の粒状添加
剤を、図2に示すように、自動計量機の計量タンク11
へ貯蔵タンク12から移送ホース13を通じて吸引モー
タ14を用いた吸引方式により1kgを約10分の速度
で移送して、移送ホース13内面の汚染度を調べた。ま
た、樹脂被覆しない添加剤粒A1(比較例)についても
同様にして汚染度を調べた。その結果を表14に示す。
なお、使用した移送ホース13は、ポリエチレン製で内
径が15mmの内外共に平滑なホースである。
[Contamination test] As shown in FIG. 2, the granular additives of the above Examples 1 to 7 were added to a measuring tank 11 of an automatic weighing machine.
1 kg was transferred from the storage tank 12 to the transfer hose 13 through the transfer hose 13 by a suction method using a suction motor 14 at a speed of about 10 minutes, and the degree of contamination on the inner surface of the transfer hose 13 was examined. In addition, the degree of contamination of the additive particles A1 (comparative example) not coated with the resin was similarly examined. Table 14 shows the results.
The transfer hose 13 used is a hose made of polyethylene and having an inner diameter of 15 mm and smooth inside and outside.

【0048】[0048]

【表14】 [Table 14]

【0049】[成形試験]上記実施例1〜7の粒状添加
剤を表15に示す各種成形用熱可塑性樹脂に添加して射
出成形によりテスト板を作成し、成形状態を調べ、結果
を表15に示した。尚、軟質塩化ビニル樹脂について
は、ロール成形によりシートを作成して、成形状態を調
べた。尚、使用した成形用樹脂を表16に示す。
[Molding test] A test plate was prepared by injection molding by adding the granular additives of Examples 1 to 7 to the various thermoplastic resins shown in Table 15, and the state of molding was examined. It was shown to. In addition, about a soft vinyl chloride resin, the sheet was produced by roll molding, and the molding state was examined. Table 16 shows the molding resins used.

【0050】[0050]

【表15】 [Table 15]

【0051】[0051]

【表16】 [Table 16]

【0052】[0052]

【発明の効果】以上のように、本発明に係る粒状添加剤
は、粉末状添加剤のような飛散による環境、作業者、成
形機等への汚染がなく、又、マスターバッチのように製
造工程が複雑でなく容易に製造でき、しかも成形用樹脂
に対する分散性もよく濃度分布の偏りといった問題もな
く、更に従来の粒状着色剤のような接触面への汚染や破
損による小片化等の問題もなく計量精度もよい優れた添
加剤である。
As described above, the granular additive according to the present invention has no pollution to the environment, workers, molding machines, etc. due to scattering like a powdery additive, and can be manufactured like a master batch. The process is not complicated and can be easily manufactured. Moreover, it has good dispersibility in the molding resin, and there is no problem such as uneven distribution of the concentration. Further, there is a problem such as contamination of the contact surface such as a conventional granular colorant or fragmentation due to breakage. It is an excellent additive with no measurement accuracy.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 添加剤粒への樹脂被覆作業に用いる混合機の
1例を示す説明図。
FIG. 1 is an explanatory view showing an example of a mixer used for a resin coating operation on additive particles.

【図2】 汚染試験に用いた添加剤移送機構の説明図。FIG. 2 is an explanatory diagram of an additive transfer mechanism used for a contamination test.

【符号の説明】[Explanation of symbols]

1:混合槽、2:混合羽根、3:モータ、11:計量タ
ンク、12:貯蔵タンク、13:移送ホース、14:吸
引モータ。
1: mixing tank, 2: mixing blade, 3: motor, 11: measuring tank, 12: storage tank, 13: transfer hose, 14: suction motor.

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) C08L 1/00 - 101/16 C08K 3/00 - 13/08 C08J 3/12 C08J 3/22 ──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. 7 , DB name) C08L 1/00-101/16 C08K 3/00-13/08 C08J 3/12 C08J 3/22

Claims (9)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 合成樹脂用の粉末状添加剤が粒状化され
粒径0.1mm〜5mmの添加剤粒に液状とした熱可
塑性樹脂を加えて攪拌、混合して添加剤粒の表面に付着
させた液状熱可塑性樹脂を固化させることにより添加剤
粒の表面を熱可塑性樹脂により被覆してなることを特徴
とする合成樹脂用粒状添加剤。
1. A thermoplastic resin powder additive for synthetic resin, which is made into a liquid form into granulated additive particles having a particle size of 0.1 mm to 5 mm.
Add plastic resin, stir, mix and adhere to the surface of additive particles
A granular additive for a synthetic resin, wherein the surface of an additive particle is coated with a thermoplastic resin by solidifying the liquid thermoplastic resin thus obtained .
【請求項2】 添加剤粒が、粉末状添加剤を分散剤、ワ
ックス、粘結剤、油剤又は熱可塑性樹脂等をバインダー
として練り合わせて粒状化したものである請求項1記載
の合成樹脂用粒状添加剤。
2. The synthetic resin granules according to claim 1, wherein the additive granules are obtained by kneading the powdery additives with a dispersing agent, a wax, a binder, an oil agent, a thermoplastic resin or the like as a binder and kneading them. Additive.
【請求項3】 粉末状添加剤が着色剤である請求項1又
は2記載の合成樹脂用粒状添加剤。
3. The granular additive for a synthetic resin according to claim 1, wherein the powdery additive is a colorant.
【請求項4】 合成樹脂用の粉末状添加剤を分散剤、ワ
ックス、粘結剤、油剤又は熱可塑性樹脂等をバインダー
として練り合わせることで粒状化して添加剤粒を得、こ
の添加剤粒に液状とした熱可塑性樹脂を加えて攪拌、混
合して添加剤粒の表面に前記液状熱可塑性樹脂を付着さ
せるとともに攪拌下に液状熱可塑性樹脂を固化させるこ
とで、添加剤粒の表面を熱可塑性樹脂被膜により被覆す
ることを特徴とする合成樹脂用粒状添加剤の製造方法。
4. A powdery additive for a synthetic resin is kneaded with a dispersant, a wax, a binder, an oil agent, a thermoplastic resin, or the like as a binder, and granulated to obtain additive granules. The liquid thermoplastic resin is added, stirred and mixed to adhere the liquid thermoplastic resin to the surface of the additive particles and solidify the liquid thermoplastic resin under stirring, so that the surface of the additive particles becomes thermoplastic. A method for producing a granular additive for a synthetic resin, which comprises coating with a resin film.
【請求項5】 添加剤粒に、熱可塑性樹脂を溶剤に溶解
して液状とした樹脂溶液を加えて攪拌、混合して添加剤
粒の表面に前記樹脂溶液を付着させるとともに攪拌下に
乾燥することにより溶剤を除去して熱可塑性樹脂を固化
させることで、添加剤粒の表面を熱可塑性樹脂被膜によ
り被覆してなる請求項4記載の合成樹脂用粒状添加剤の
製造方法。
5. A resin solution obtained by dissolving a thermoplastic resin in a solvent is added to the additive particles, and the mixture is stirred and mixed to adhere the resin solution to the surface of the additive particles and dried under stirring. 5. The method for producing a granular additive for a synthetic resin according to claim 4, wherein the surface of the additive particles is covered with a thermoplastic resin film by removing the solvent to solidify the thermoplastic resin.
【請求項6】 添加剤粒に、加熱溶融して液状とした熱
可塑性樹脂を加えて攪拌、混合して添加剤粒の表面に前
記液状樹脂を付着させるとともに、攪拌下に冷却して熱
可塑性樹脂を固化させることで、添加剤粒の表面を熱可
塑性樹脂被膜により被覆してなる請求項4記載の合成樹
脂用粒状添加剤の製造方法。
6. A thermoplastic resin which is heated and melted into a liquid state is added to the additive particles, and the mixture is stirred and mixed to adhere the liquid resin to the surface of the additive particles. The method for producing a granular additive for a synthetic resin according to claim 4, wherein the surface of the additive particle is coated with a thermoplastic resin film by solidifying the resin.
【請求項7】 熱可塑性樹脂として、常温で固体で、か
つ50〜100℃で加熱することにより溶融して液状化
するものを用いてなる請求項6記載の合成樹脂用粒状添
加剤の製造方法。
7. The method for producing a granular additive for a synthetic resin according to claim 6, wherein the thermoplastic resin is a solid that is solid at normal temperature and melts and liquefies when heated at 50 to 100 ° C. .
【請求項8】 粉末状添加剤を粒状化して添加剤粒を得
るに際し、核となる熱可塑性樹脂粉末、粉末状添加剤、
及び分散剤、ワックス、粘結剤、油剤又は熱可塑性樹脂
等のバインダーを混合機で混合し、前記熱可塑性樹脂粉
末の粒子表面に前記バインダーにより前記粉末状添加剤
を固着してなる請求項4〜7のいずれかに記載の合成樹
脂用粒状添加剤の製造方法。
8. A thermoplastic resin powder serving as a nucleus when powdery additives are granulated to obtain additive particles, a powdery additive,
And a binder such as a dispersant, a wax, a binder, an oil agent, or a thermoplastic resin is mixed by a mixer, and the powdery additive is fixed to the surface of the particles of the thermoplastic resin powder by the binder. 8. The method for producing a granular additive for a synthetic resin according to any one of claims 1 to 7.
【請求項9】 粉末状添加剤を粒状化して添加剤粒を得
るに際し、粉末状添加剤と、金属石鹸、ポリエチレンワ
ックス、ポリプロピレンワックス、グリセリン脂肪酸エ
ステル又は樹脂類からなる配合物を加熱し、溶融、混練
した後、冷却固化し、次いでこの固化物を粉砕してなる
請求項4〜7のいずれかに記載の合成樹脂用粒状添加剤
の製造方法。
9. A method for granulating the powdery additive to obtain the additive granules, wherein the mixture comprising the powdery additive and metal soap, polyethylene wax, polypropylene wax, glycerin fatty acid ester or resin is heated and melted. The method for producing a granular additive for a synthetic resin according to any one of claims 4 to 7, wherein the mixture is cooled, solidified, and then pulverized.
JP34703399A 1999-12-07 1999-12-07 Granular additive for synthetic resin and method for producing the same Expired - Lifetime JP3248528B2 (en)

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