JP2016204402A - Grain composition and manufacturing method therefor - Google Patents
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Abstract
Description
本発明は、砂のような粒体である主材料と、シリコーンゴムと流動パラフィンとが混合した粘着性のバインダを含み、このバインダが粒体をコーティングし、かつ粒体間に適度の空間を残して充填される粒体組成物であって、粒体同士の優れた相互粘着性を有するが、粒体と接触する周囲の他の部材との粘着性が極めて小さく、かつ圧縮造形後、長時間の保形性を有する粒体組成物とその製造方法に関する。 The present invention includes a main material which is a granule such as sand, and an adhesive binder in which silicone rubber and liquid paraffin are mixed. The binder coats the granule and provides an appropriate space between the granules. It is a granular composition to be filled and has excellent mutual adhesiveness between the granular materials, but has extremely low adhesiveness with other members in contact with the granular material, and is long after compression molding. The present invention relates to a granular composition having shape retention of time and a method for producing the same.
従来、主に遊戯用あるいは教育用に適した粒状の組成物であって、粒体間の相互粘着性を有し、容易に造形、変形可能であるが、接触する周囲の部材には容易に粘着しないという特性を持つものとして、特許文献１に記載されたものが提案されている。
この組成物は、粒子状又は顆粒状の物質である砂のような粒体と、その粒体の表面をコーティングするバインダとを含み、そのバインダはヒドロキシル基（水酸基）を末端に有し、ホウ素化合物で架橋されたポリマーを含む組成物である。
この組成物は、所定量の粒体をミキサに入れる工程と、水酸基を末端に持つ低粘度のポリマーを含む成分をミキサに入れる工程と、架橋剤としてのホウ素を含む成分をミキサに入れる工程とを含む方法により製造される。
Conventionally, it is a granular composition mainly suitable for amusement or educational use. It has mutual adhesiveness between grains and can be easily shaped and deformed. As what has the characteristic of not sticking, what was described in patent document 1 is proposed.
This composition includes a particle-like or granular substance such as sand and a binder that coats the surface of the particle, and the binder has a hydroxyl group (hydroxyl group) at its end, boron A composition comprising a polymer crosslinked with a compound.
The composition includes a step of putting a predetermined amount of granules into a mixer, a step of containing a component containing a low-viscosity polymer terminated with a hydroxyl group, and a step of putting a component containing boron as a crosslinking agent into the mixer. It is manufactured by the method containing.
上記従来の組成物は、高い流動性を持つが、造形性、保形性に乏しく、造形後に放置すると、ごく短時間で崩壊してしまい、遊具としての機能に欠けるところがある。したがって、本発明は、ホウ素化合物で架橋されたポリマーを含まない生体不活性な粒体組成物であって、自由に変形し、造形が可能で、造形後の保形成に優れ、また粒体間の相互粘着性を有するが、手、衣服、作業台などの周囲の他の部材に対する粘着性が極めて低い粒体組成物と、その製造方法を提供することを目的としている。 The conventional composition has high fluidity, but is poor in formability and shape retention, and when left after shaping, it collapses in a very short time and lacks the function as a playground equipment. Therefore, the present invention is a bioinert granule composition that does not contain a polymer cross-linked with a boron compound, can be freely deformed, can be shaped, has excellent shape retention after shaping, It is an object of the present invention to provide a granule composition having a mutual adhesiveness but having extremely low adhesiveness to other members such as hands, clothes and work tables, and a method for producing the same.
上記課題を解決するための、本発明の粒体組成物は、表面にケイ素酸化物を有する粒体と、シリコーンゴムと、このシリコーンゴムと混合して粘着性を有するバインダを形成する流動パラフィンとを含み、粒体がバインダによりコーティングされると共に、粒体間に適度の空間を残してバインダが充填され、粒体の含有率が９３．００〜９７．００重量％であり、保形性−流動性の加圧可逆性を有する粒体組成物である。
本発明の粒体組成物の製造方法は、２液付加反応硬化型シリコーンエラストマーの主剤と硬化剤の２液と流動パラフィンとを混合撹拌して混合液を生成する第１の工程と、混合液と粒体と含む原材料をミキサに投入する第２の工程と、ミキサに投入された原材料を、４０℃〜９０℃の範囲で加熱しながら、粒体間の所望の粘着性が得られるまで、所定時間混練する第３の工程とを含む。第３の工程において、シリコーンポリマーを架橋させてシリコーンゴムを生成する第４の工程と、流動パラフィンをシリコーンゴムの分子間に均一に分散させて粘着性を有するバインダを形成する第５の工程と、バインダを粒体の表面にコーティングする第６の工程と、粒体の間に適度の空間を残してバインダを充填する第７の工程とを含む。
In order to solve the above problems, the granule composition of the present invention comprises a granule having silicon oxide on the surface, silicone rubber, and liquid paraffin that forms a binder having an adhesive property when mixed with the silicone rubber. The particles are coated with a binder and filled with a binder leaving an appropriate space between the particles, the content of the particles is 93.00 to 97.00% by weight, and the shape retention property- It is a granular composition having fluid reversible pressure reversibility.
The method for producing a granule composition of the present invention includes a first step of mixing and stirring a main component of a two-component addition reaction-curable silicone elastomer, two components of a curing agent, and liquid paraffin to produce a mixed solution, and a mixed solution. And the second step of charging the raw material containing the particles into the mixer, and while heating the raw material charged in the mixer in the range of 40 ° C. to 90 ° C., until the desired adhesiveness between the particles is obtained, And a third step of kneading for a predetermined time. In the third step, a fourth step of cross-linking the silicone polymer to produce a silicone rubber, and a fifth step of forming a sticky binder by uniformly dispersing liquid paraffin between the silicone rubber molecules, The sixth step of coating the surface of the particles with the binder and the seventh step of filling the binder leaving an appropriate space between the particles.
本発明の粒体組成物は、自由に変形し、加圧することで造形が可能で、造形後の保形成に優れ、また粒体間の相互粘着性を有するが、手、衣服、作業台などの周囲の他の部材に対する粘着性が極めて低く、生体不活性で安全性が高い。本発明の製造方法によれば、上記粒体組成物を容易に得ることができる。 The granule composition of the present invention can be freely deformed and shaped by pressurization, is excellent in pre-formation after shaping, and has mutual adhesiveness between the granules, such as hands, clothes, workbench, etc. The adhesiveness to other members around is extremely low, bioinert and highly safe. According to the production method of the present invention, the granule composition can be easily obtained.
図面を参照して本発明の実施の形態を説明する。
図１は、本発明に係る組成物の電子顕微鏡写真である。天然の砂からなる大量の粒体１は、シリコーンゴムと流動パラフィンとの混合物である粘着性のバインダ２により表面がコーティングされている。バインダ２には、比較的架橋密度の高いシリコーンゴムと比較的架橋密度の低いシリコーンゴムが含まれる。粒体１間にはバインダ２が充填されるが、適度な空間３が残される。この粒体組成物は、保形性−流動性の加圧可逆性を有し、加圧造形後の比較的長時間の保形性を有し、加圧により流動性を回復する。シリコーンゴムと流動パラフィンとの混合物であるバインダ２の粘性は、混練の時間と加熱温度の制御により調整される。
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an electron micrograph of a composition according to the present invention. The surface of a large number of granules 1 made of natural sand is coated with an adhesive binder 2 which is a mixture of silicone rubber and liquid paraffin. The binder 2 includes a silicone rubber having a relatively high crosslinking density and a silicone rubber having a relatively low crosslinking density. A binder 2 is filled between the granules 1, but an appropriate space 3 is left. This granule composition has a shape retentivity-flow reversibility under pressure, has a shape retentivity for a relatively long time after pressure molding, and recovers fluidity by pressurization. The viscosity of the binder 2, which is a mixture of silicone rubber and liquid paraffin, is adjusted by controlling the kneading time and heating temperature.
図２は、本発明に係る粒体組成物の製作過程、すなわち混練時間又は加熱温度が不十分な状態を示す電子顕微鏡写真である。バインダ２を形成するシリコーンゴムと流動パラフィンとの混合物の流動性が高く、粒体１の相互間には大きな空間３が形成され、この空間３にはバインダ２が充填されていない。造形後の保形性がほとんどない粒体組成物を示している。所望の保形性−流動性の加圧可逆性を付与するためには、追加的な加熱又は混練を必要とする。この過程で、流動性の高いバインダ２により粒体１の表面を十分に被覆することが、追加的加熱又は混練による粒子１間の密着性の改善のために重要な過程である。 FIG. 2 is an electron micrograph showing a production process of the granular composition according to the present invention, that is, a state where the kneading time or heating temperature is insufficient. The fluidity of the mixture of silicone rubber and liquid paraffin forming the binder 2 is high, and a large space 3 is formed between the granules 1, and the binder 3 is not filled in the space 3. It shows a granule composition with little shape retention after shaping. Additional heating or kneading is required to provide the desired shape retention-fluid pressure reversibility. In this process, sufficiently covering the surface of the granule 1 with the binder 2 having high fluidity is an important process for improving the adhesion between the particles 1 by additional heating or kneading.
上記粒体組成物は、以下の方法で作製される。主剤Ａと硬化剤Ｂの２液を混合することにより硬化する、２液付加反応硬化型シリコーンエラストマーを用いる。第１の工程において、所定量のＡ液とＢ液と流動パラフィンを混合撹拌して混合液を生成する。次いで、第２の工程において、所定量の混合液と砂とを含む原材料をミキサに投入する。第３の工程において、ミキサに投入された原材料を、４０℃〜９０℃の範囲で、加熱しながら、所定時間混練する。以下の第４ないし第７の工程は、第３の工程中において順不同に実行される。すなわち、原材料の混連中、第４の工程として、シリコーンポリマーが架橋して硬化し、シリコーンゴムが形成される。また、第５の工程として、シリコーンゴムの分子間に流動パラフィンが分散する。これにより、混練中の粒体間の適度な界面活性が維持される。第６の工程において、粒体の表面に、シリコーンゴムと流動パラフィンとの混合物からなるバインダによるコーティング膜が形成される。流動パラフィンが、シリコーンゴムの硬化速度を遅らせて、バインダが粒体をコーティングするのに十分な混練時間が確保される。同時に、第７の工程として、バインダが、粒体間に適度の空間を残して充填され、部分的に多数の粒体が比較的密に集合して、互いに粘着した塊が形成される。加熱温度と混練時間の調整により、粒体間の所望の粘着性が得られたら、混練を終了し、室温に自然冷却して所望の粒体組成物が完成する。 The said granule composition is produced with the following method. A two-component addition reaction curable silicone elastomer that is cured by mixing two liquids of a main agent A and a curing agent B is used. In the first step, a predetermined amount of liquid A, liquid B and liquid paraffin are mixed and stirred to produce a mixed liquid. Next, in a second step, a raw material containing a predetermined amount of the mixed liquid and sand is charged into the mixer. In the third step, the raw materials charged in the mixer are kneaded for a predetermined time while heating in the range of 40 ° C to 90 ° C. The following fourth to seventh steps are executed in random order during the third step. That is, during the mixing of raw materials, as a fourth step, the silicone polymer is cross-linked and cured to form a silicone rubber. In the fifth step, liquid paraffin is dispersed between the silicone rubber molecules. Thereby, moderate surface activity between the granules during kneading is maintained. In the sixth step, a coating film made of a binder made of a mixture of silicone rubber and liquid paraffin is formed on the surface of the granules. Liquid paraffin slows down the cure rate of the silicone rubber, ensuring sufficient kneading time for the binder to coat the granules. At the same time, as a seventh step, the binder is filled leaving an appropriate space between the particles, and a large number of particles are partially gathered relatively densely to form a lump that adheres to each other. When the desired adhesiveness between the granules is obtained by adjusting the heating temperature and the kneading time, the kneading is finished and the mixture is naturally cooled to room temperature to complete the desired granule composition.
天然の砂は、一般に二酸化ケイ素を５０％以上含有する。粒体の原材料として、二酸化ケイ素を５０％以上含有しないものを使用する場合、当該粒体の表面にケイ素酸化物を含むコーティング層を形成する表面改質を行い、シリコーンエラストマーとの親和性を改善する必要がある。粒体の平均粒子径は、０．０５〜０．６mmであることが遊具としての取扱上好適である。 Natural sand generally contains 50% or more of silicon dioxide. When using a material that does not contain 50% or more of silicon dioxide as the raw material of the granule, surface modification is performed to form a coating layer containing silicon oxide on the surface of the granule, improving the affinity with the silicone elastomer There is a need to. The average particle diameter of the granules is preferably from 0.05 to 0.6 mm for handling as a playground equipment.
本発明の実施例を説明する。２液付加反応硬化型シリコーンエラストマーとして、Wacker-Chemie GmbH製のＷＡＣＫＥＲ（登録商標）６１２を用いる。ＷＡＣＫＥＲ６１２のＡ液・Ｂ液４．５g、流動パラフィン０．３９gを混合撹拌して混合液を生成する。この混合液と天然砂１００gからなる原材料をミキサに投入し、室温から８５℃まで加熱しながら、目視により所望の粘度が得られるまで混練した。得られた粒体組成物のサンプルを、５０mlのメスシリンダに５０g入れ、７３８gの荷重で２分間圧縮したときの圧縮嵩密度は、０．６５〜０．７０g/?であった。このメスシリンダから取り出した円柱状成型体を放置し、崩壊現象が起こるまでの時間を測定したところ１５分以上であり、１５分経過後、加圧すれば崩壊して元の流動性を取り戻した。粒体組成物は、良好な相互粘着性と、形状保持性を有するが、接触する他の部材との粘着性はほとんどないことが確認できた。この特性であれば、遊具としての使用に好適である。 Examples of the present invention will be described. WACKER (registered trademark) 612 manufactured by Wacker-Chemie GmbH is used as the two-component addition reaction-curable silicone elastomer. WACKER612 liquid A and B liquid 4.5g and liquid paraffin 0.39g are mixed and stirred, and a liquid mixture is produced | generated. The raw material consisting of this mixed solution and 100 g of natural sand was put into a mixer and kneaded until the desired viscosity was obtained visually while heating from room temperature to 85 ° C. When 50 g of the obtained granule composition sample was put into a 50 ml measuring cylinder and compressed with a load of 738 g for 2 minutes, the compression bulk density was 0.65 to 0.70 g / ?. The columnar molded body taken out from the measuring cylinder was allowed to stand and the time until the collapse phenomenon was measured was 15 minutes or more. After 15 minutes, when the pressure was applied, it collapsed to restore the original fluidity. . It was confirmed that the granular composition had good mutual adhesiveness and shape retention, but almost no adhesiveness with other members in contact. This characteristic is suitable for use as a playground equipment.
砂１００g、ＷＡＣＫＥＲ６１２のＡ液・Ｂ液２．７６ｇ〜６．９０g、流動パラフィン０．２４g〜０．６０gの混合割合の範囲で、種々上記同様の方法で粒体組成物の生成を試みた結果、得られたいずれの粒体組成物も、上記実施例と同等の良好な使用感が得られた。ＷＡＣＫＥＲ６１２以外の２液付加反応硬化型シリコーンエラストマーを用いても、同様の結果が得られた。
砂１００gに対しＷＡＣＫＥＲ６１２のＡ液・Ｂ液、流動パラフィンの混合割合を種々変え、常温〜９０℃まで同時間混練して粒体組成物の生成を試みた結果を下表に示す。圧縮嵩密度は、５０mlのメスシリンダに５０g入れ、７３８gの荷重で２分間圧縮して形成された圧縮成形体により測定した。
Results of attempts to produce a granular composition by various methods similar to those described above in the range of 100 g of sand, 2.76 g to 6.90 g of liquids A and B of WACKER 612, and 0.24 g to 0.60 g of liquid paraffin In any of the obtained granule compositions, a good feeling of use equivalent to that in the above examples was obtained. Similar results were obtained using a two-component addition reaction curable silicone elastomer other than WACKER612.
The following table shows the results of attempts to produce a granular composition by changing the mixing ratio of WACKER 612 liquid A / liquid B and liquid paraffin to 100 g of sand and kneading from room temperature to 90 ° C. for the same time. The compression bulk density was measured with a compression molded body formed by putting 50 g in a 50 ml graduated cylinder and compressing it with a load of 738 g for 2 minutes.
１ 粒体
２ バインダ
３ 空間
1 Granule 2 Binder 3 Space
Claims (6)
前記混合液と前記粒体と含む原材料をミキサに投入する第２の工程と、
ミキサに投入された前記原材料を、４０℃〜９０℃の範囲で加熱しながら、粒体間の所望の粘着性が得られるまで、所定時間混練する第３の工程と、を含み、
前記第３の工程において、シリコーンポリマーを架橋させてシリコーンゴムを生成する第４の工程と、前記流動パラフィンを前記シリコーンゴムの分子間に均一に分散させて粘着性を有するバインダを形成する第５の工程と、前記バインダを前記粒体の表面にコーティングする第６の工程と、前記粒体の間に適度の空間を残して前記バインダを充填する第７の工程と、を含むことを特徴とする請求項１に記載の粒体組成物の製造方法。 A first step of producing a mixed liquid by mixing and stirring two liquids of a main component of a two-component addition reaction curable silicone elastomer and a curing agent and the liquid paraffin;
A second step of charging a raw material containing the mixed liquid and the granules into a mixer;
A third step of kneading the raw material charged in the mixer for a predetermined time until the desired adhesiveness between the granules is obtained while heating in the range of 40 ° C. to 90 ° C.,
In the third step, a fourth step of cross-linking the silicone polymer to form a silicone rubber, and a fifth step of forming an adhesive binder by uniformly dispersing the liquid paraffin among the molecules of the silicone rubber. And a sixth step of coating the surface of the particles with the binder, and a seventh step of filling the binder leaving an appropriate space between the particles. The manufacturing method of the granule composition of Claim 1 to do.
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