JP2002338405A - Buoyancy-adjusting agent and buoyancy-adjusted formed material by using the same - Google Patents
Buoyancy-adjusting agent and buoyancy-adjusted formed material by using the sameInfo
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- JP2002338405A JP2002338405A JP2001150474A JP2001150474A JP2002338405A JP 2002338405 A JP2002338405 A JP 2002338405A JP 2001150474 A JP2001150474 A JP 2001150474A JP 2001150474 A JP2001150474 A JP 2001150474A JP 2002338405 A JP2002338405 A JP 2002338405A
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- Prior art keywords
- buoyancy
- water
- hydrophilic
- hollow
- hollow particles
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- Agricultural Chemicals And Associated Chemicals (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、浮力調整剤に関
する。[0001] The present invention relates to a buoyancy regulator.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】一般
に、農薬類は、水中に沈むように錠剤化やペレット化が
されている。しかし、この錠剤やペレットの沈降速度は
大きく、農地の底にたまりやすい。このため、農薬が農
地の底に蓄積し、農薬の効果が十分に稲等に働かない場
合がある。2. Description of the Related Art Generally, agricultural chemicals are formed into tablets or pellets so as to sink in water. However, the sedimentation speed of these tablets and pellets is large and tends to collect at the bottom of farmland. For this reason, pesticides may accumulate at the bottom of farmland, and the effect of pesticides may not sufficiently work on rice and the like.
【０００３】これに対し、特開平５−３４５７０１号公
報に、農薬錠剤に中空部や凹部を設け、水溶性フィルム
や水溶紙等でコーティングすることによって、沈降速度
を調整する方法が開示されている。On the other hand, Japanese Patent Application Laid-Open No. 5-345701 discloses a method in which a pesticide tablet is provided with a hollow portion or a concave portion and coated with a water-soluble film or water-soluble paper to adjust the sedimentation speed. .
【０００４】しかしながら、上記の方法では、沈降速度
を調整することができるものの、コーティング処理が煩
雑であるという問題点を有する。また、上記の方法で得
られる錠剤は、コーティング材が溶解すると沈む。この
ため、この溶解までの時間は、コーティング材の溶解速
度に依存し、沈降速度の調整が難しくなる。[0004] However, in the above method, although the sedimentation speed can be adjusted, there is a problem that the coating process is complicated. The tablet obtained by the above method sinks when the coating material is dissolved. For this reason, the time until the dissolution depends on the dissolution rate of the coating material, and it is difficult to adjust the sedimentation rate.
【０００５】そこで、この発明は、容易に製造できか
つ、沈降速度を容易に調整できる浮力調整剤を提供する
ことを目的とする。Accordingly, an object of the present invention is to provide a buoyancy regulator which can be easily manufactured and whose sedimentation speed can be easily adjusted.
【０００６】[0006]
【課題を解決するための手段】この発明は、親水性の多
孔質体又は中空粒子を疎水性物質で被覆することにより
上記課題を解決したのである。The present invention has solved the above-mentioned problems by coating a hydrophilic porous body or hollow particles with a hydrophobic substance.
【０００７】多孔質体又は中空粒子を用いるので、浮力
調整剤のカサ密度を小さくすることができ、農薬等の固
形物に混合して成形することにより、得られる成形体に
浮力を与えることができる。このため、上記成形体の沈
降速度を低減させることができる。[0007] Since the porous body or the hollow particles are used, the bulk density of the buoyancy regulator can be reduced, and it is possible to impart buoyancy to the obtained molded body by mixing with a solid such as an agricultural chemical and molding. it can. For this reason, the sedimentation speed of the compact can be reduced.
【０００８】また、上記成形体内に混合する浮力調整剤
の量を調整することにより、上記成形体の沈降速度を調
整することができる。Further, by adjusting the amount of the buoyancy regulator mixed into the molded body, the sedimentation speed of the molded body can be adjusted.
【０００９】さらに、上記疎水性物質で被覆するので、
浮力調整剤が水と接触しても、水が親水性の多孔質体又
は中空粒子と接触するのが抑制され、浮力調整剤が持つ
孔や中空部分に水が浸入して浮力がなくなるのを緩和で
きる。このため、長期にわたり、浮力調整効果を発揮で
きる。Further, since the coating is made with the above-mentioned hydrophobic substance,
Even when the buoyancy adjuster comes into contact with water, the water is suppressed from contacting the hydrophilic porous body or the hollow particles, so that water enters the pores or hollow portions of the buoyancy adjuster and loses buoyancy. Can be relaxed. For this reason, the buoyancy adjustment effect can be exhibited for a long period of time.
【００１０】さらにまた、親水性の多孔質体又は中空粒
子の外周に疎水性物質で被覆するのみなので、製造が容
易となる。Furthermore, since the outer periphery of the hydrophilic porous body or hollow particles is merely coated with a hydrophobic substance, the production becomes easy.
【００１１】[0011]
【発明の実施の形態】以下、この発明の実施形態を説明
する。この発明にかかる浮力調整剤は、親水性の多孔質
体又は中空粒子を疎水性物質で被覆したものである。Embodiments of the present invention will be described below. The buoyancy regulator according to the present invention is obtained by coating a hydrophilic porous body or hollow particles with a hydrophobic substance.
【００１２】上記の親水性の多孔質体又は中空粒子と
は、親水性素材を多孔化したもの、又は中空としたもの
をいう。上記親水性素材としては、セルロース、セルロ
ース誘導体又はポリビニルアルコールの架橋体から選ば
れる水不溶性の親水性高分子、又は珪酸カルシウム、ア
ルミナ、シリカゲルから選ばれる無機物質があげられ
る。上記の水不溶性の親水性高分子や無機物質を用いる
ことにより、使用中は被覆体である疎水性物質が剥がれ
ず、内部の多孔質体又は中空粒子の内部に水が浸入する
のを抑制でき、浮力を維持できる。また、使用後は上記
疎水性物質が剥がれやすくなり、内部の多孔質体又は中
空粒子の内部に水が浸入して沈降する。その後、無機物
質は土に同化し、親水性高分子は水中で徐々に生分解す
るので、環境への負荷が小さいという特徴を有する。The above-mentioned hydrophilic porous material or hollow particle means a hydrophilic material made porous or hollow. Examples of the hydrophilic material include a water-insoluble hydrophilic polymer selected from cellulose, a cellulose derivative or a crosslinked product of polyvinyl alcohol, and an inorganic substance selected from calcium silicate, alumina, and silica gel. By using the above-mentioned water-insoluble hydrophilic polymer or inorganic substance, the hydrophobic substance serving as the coating does not peel off during use, and it is possible to suppress water from entering the inside of the internal porous body or hollow particles. , Can maintain buoyancy. Further, after use, the above-mentioned hydrophobic substance is easily peeled off, and water penetrates into the inside of the porous body or hollow particles inside and settles. Thereafter, the inorganic substance is assimilated into the soil, and the hydrophilic polymer is gradually biodegraded in water.
【００１３】上記親水性素材を多孔化又は中空とするの
は、得られる浮力調整剤のカサ密度を小さくして、水や
海水等の水系媒体中に入れたときに浮力を生じさせるた
めである。この浮力は、浮力調整剤のカサ密度と水系媒
体の密度との関係によって決まる。しかしながら、十分
な浮力を得るためには、浮力調整剤のカサ密度として、
０．１〜０．７ｇ／ｃｍ3がよく、０．２〜０．５ｇ／
ｃｍ3が好ましい。０．１ｇ／ｃｍ3より小さいと、この
親水性の多孔質体又は中空粒子において孔や中空などの
空間部分が占める割合が大きくなり、強度が弱くなる。
一方、０．７ｇ／ｃｍ3より大きいと、浮力が小さくな
る。特に、上記無機物質は、真比重が大きいので、多孔
性を有するもの、又は中空なものが好ましい。これによ
り、得られる浮力調整剤のカサ密度を低下させることが
できる。The reason why the hydrophilic material is made porous or hollow is to reduce the bulk density of the resulting buoyancy regulator and to generate buoyancy when placed in an aqueous medium such as water or seawater. . The buoyancy is determined by the relationship between the bulk density of the buoyancy modifier and the density of the aqueous medium. However, in order to obtain sufficient buoyancy, the bulk density of the buoyancy modifier is
0.1 to 0.7 g / cm 3 is good, and 0.2 to 0.5 g / cm 3
cm 3 is preferred. If it is less than 0.1 g / cm 3 , the proportion of the hydrophilic porous body or hollow particles occupied by spaces such as holes and hollows becomes large, and the strength becomes weak.
On the other hand, when it is larger than 0.7 g / cm 3 , the buoyancy becomes small. Particularly, since the inorganic substance has a large true specific gravity, a porous substance or a hollow substance is preferable. Thereby, the bulk density of the obtained buoyancy regulator can be reduced.
【００１４】上記疎水性物質は、上記親水性の多孔質体
又は中空粒子を被覆することにより、この親水性の多孔
質体又は中空粒子が水と接触するのを抑制するものであ
る。この疎水性物質としては、水中で放置された後、生
分解や加水分解等の分解性を有するものが好ましく、例
として、ロジン系樹脂、ワックス、高級脂肪酸、高級ア
ルコール、セラック、シュガーエステル、セルロース誘
導体等があげられる。The above-mentioned hydrophobic substance covers the above-mentioned hydrophilic porous body or hollow particles, thereby suppressing the contact of the hydrophilic porous body or hollow particles with water. As the hydrophobic substance, those which have degradability such as biodegradation or hydrolysis after being left in water are preferable. Derivatives and the like.
【００１５】上記浮力調整剤は、次に記載の方法で製造
することができる。まず、上記の水不溶性の親水性高分
子の場合は、その液状物又は前駆体の液状物を粒子化さ
せながら固形化させる。次に、上記の無機物質の場合
は、バインダーを加えて成形したり、水溶液からゲル化
させる等、様々な方法で固形化させる。このとき、各種
の方法で多孔化又は中空化させる。The buoyancy regulator can be produced by the following method. First, in the case of the above-mentioned water-insoluble hydrophilic polymer, the liquid or the precursor liquid is solidified while being formed into particles. Next, in the case of the above-mentioned inorganic substance, it is solidified by various methods such as molding by adding a binder or gelling from an aqueous solution. At this time, it is made porous or hollow by various methods.
【００１６】次に、上記疎水性物質で上記親水性の多孔
質体又は中空粒子の表面を被覆する。被覆方法として
は、塗布、噴霧、浸漬等、任意の方法を使用できる。Next, the surface of the hydrophilic porous body or the hollow particle is coated with the hydrophobic substance. As the coating method, any method such as coating, spraying, dipping, and the like can be used.
【００１７】このようにして得られた浮力調整剤は、農
薬等の沈降速度を調整したい固形材料に混合し、ペレッ
ト化等、成形する。得られた浮力調整成形体を目的とす
る水に投入すると、この浮力調整成形体の沈降速度が小
さくなり、水中に漂う時間が長くなる。このため、農薬
等の成形体が沈降するまでの間に、農薬等が水に徐々に
溶け出し、一箇所に集中することなく、広範囲に効果を
及ぼすことができる。The buoyancy regulator obtained in this manner is mixed with a solid material whose sedimentation speed, such as agrochemicals, is to be adjusted, and formed into pellets or the like. When the obtained buoyancy-adjusted molded article is put into target water, the sedimentation speed of the buoyancy-adjusted molded article decreases, and the time for which it floats in water increases. Therefore, the pesticide or the like gradually dissolves in the water until the molded body of the pesticide or the like settles, and the effect can be exerted over a wide range without being concentrated at one place.
【００１８】上記浮力調整成形体に含まれる浮力調整剤
の量を増減することにより、この浮力調整成形体の沈降
速度を調整することができる。この浮力調整成形体１０
０重量部中に含まれる浮力調整剤の量は、０．１〜８０
重量部が好ましく、０．５〜５０重量部がより好まし
い。０．１重量部より少ないと、浮力調整の効果が発揮
できず農薬等の沈降速度を調整することができない場合
がある。一方、８０重量部より多いと、浮力調整成形体
に占められる農薬等の割合が小さくなり、効果が薄くな
る。さらに、浮力調整成形体が水に浮いて、沈降しなく
なる場合がある。The sedimentation speed of the buoyancy adjusting molded body can be adjusted by increasing or decreasing the amount of the buoyancy adjusting agent contained in the buoyancy adjusting molded body. This buoyancy adjusting molded body 10
The amount of the buoyancy modifier contained in 0 parts by weight is 0.1 to 80.
Part by weight is preferable, and 0.5 to 50 part by weight is more preferable. If the amount is less than 0.1 part by weight, the effect of adjusting the buoyancy cannot be exerted, and the sedimentation speed of pesticides or the like may not be adjusted. On the other hand, if the amount is more than 80 parts by weight, the proportion of the pesticide or the like occupied in the buoyancy-adjusted molded article is reduced, and the effect is reduced. Further, the buoyancy-adjusted molded body may float on water and may not settle.
【００１９】このようにして得られた浮力調整成形体
は、使用する固形材料の用途に合わせて使用される。例
えば、固形材料として農薬を使用する場合は、農地等に
投入される。このとき、この浮力調整成形体はすぐに底
に沈降せず、沈降するまでに時間を要する。この間に農
薬が徐々に溶解し、農薬としての効果を発揮させること
ができると共に、効果がなくなった後は、土に同化又は
生分解するため、環境への負荷を小さくすることができ
る。The buoyancy-adjusted molded body thus obtained is used in accordance with the use of the solid material to be used. For example, when an agricultural chemical is used as a solid material, it is put into agricultural land or the like. At this time, the buoyancy-adjusted molded body does not settle to the bottom immediately, and it takes time to settle. During this time, the pesticide gradually dissolves and can exert its effect as a pesticide. After the effect is lost, the pesticide is assimilated or biodegraded in soil, so that the load on the environment can be reduced.
【００２０】[0020]
【実施例】（製造例）セロハン製造用のビスコース（セ
ルロース濃度９．５重量％、塩化アンモニウム価６、ア
ルカリ濃度６重量％、粘度５，５００ｃＰ）９１．３重
量％に炭酸カルシウム（ＮＳ＃２５００、日東粉化工業
（株）製）８．７重量％を混合したものを円筒状の容器
に供給し、その容器を回転させて９４．５Ｇの重力加速
度を働かせて、容器に空いた直径０．４ｍｍの小孔から
ビスコース分散液の液滴を吐出して、２Ｎ塩酸で凝固再
生した。その後、脱硫、漂白、水洗の処理を行い、乾燥
することで多孔性球状セルロース微粒子を得た。EXAMPLES (Production Example) 91.3% by weight of viscose (cellulose concentration: 9.5% by weight, ammonium chloride value: 6, alkali concentration: 6% by weight, viscosity: 5,500 cP) for cellophane production was mixed with calcium carbonate (NS #). 2500, manufactured by Nitto Powder Chemical Co., Ltd.) was supplied to a cylindrical container, and the container was rotated to apply a gravitational acceleration of 94.5 G to rotate the container so that the diameter of the container became empty. Droplets of the viscose dispersion liquid were ejected from small holes of 0.4 mm, and solidified and regenerated with 2N hydrochloric acid. Thereafter, the particles were subjected to desulfurization, bleaching, and washing treatments, and dried to obtain porous spherical cellulose fine particles.
【００２１】（実施例１）加熱溶融したパラフィンワッ
クス（ＨＮＰ−９ 日本精蝋（株）製）中に上記の多孔
性球状セルロース微粒子（カサ密度０．１７ｇ／ｃ
ｍ3、粒径７００μｍ）を投入して混合し、パラフィン
ワックスを２５重量％含有する浮力調整剤を得た。この
浮力調整剤のカサ密度は０．２０ｇ／ｃｍ3であった。
次に、機能剤としてのチアベンダゾール（和光純薬
（株）製）３０重量％に補助剤としてベントナイト（関
東化学（株）製）２３重量％及びタルク（ナカライテス
ク（株）製）３０重量％、水１６重量％を加え、上記浮
力調整剤１重量％を混合し、均一になるように撹拌し
て、直径１ｃｍ、高さ１．５ｃｍのペレット状に成形し
た。このペレットを水面に静かに置いた時、水面から３
０ｃｍ沈降する時間を測定し、沈降速度（ｍ／秒）を求
めた。その結果を表１に示す。Example 1 The above-mentioned porous spherical cellulose fine particles (having a bulk density of 0.17 g / c) were dissolved in a heated and melted paraffin wax (HNP-9 manufactured by Nippon Seiro Co., Ltd.).
m 3 , particle size 700 μm) and mixed to obtain a buoyancy regulator containing 25% by weight of paraffin wax. The bulk density of this buoyancy regulator was 0.20 g / cm 3 .
Next, 30% by weight of thiabendazole (manufactured by Wako Pure Chemical Industries, Ltd.) as a functional agent, 23% by weight of bentonite (manufactured by Kanto Chemical Co., Ltd.) and 30% by weight of talc (manufactured by Nacalai Tesque, Inc.) 16% by weight of water was added, 1% by weight of the buoyancy regulator was mixed, and the mixture was stirred so as to be uniform to form a pellet having a diameter of 1 cm and a height of 1.5 cm. When the pellet is gently placed on the surface of the water,
The time for 0 cm settling was measured, and the settling velocity (m / sec) was determined. Table 1 shows the results.
【００２２】（実施例２）実施例１で用いたパラフィン
ワックスの代わりに、ロジンエステル（ＲＥ 荒川化学
工業（株）製）を用いた以外は、実施例１と同様にして
浮力調整剤を得た。得られた浮力調整剤のカサ密度は
０．２１ｇ／ｃｍ3であった。この浮力調整剤を用い
て、上記の方法にしたがってペレットを成形し、沈降速
度を測定した。その結果を表１に示す。Example 2 A buoyancy regulator was obtained in the same manner as in Example 1 except that rosin ester (RE manufactured by Arakawa Chemical Industries, Ltd.) was used instead of the paraffin wax used in Example 1. Was. The bulk density of the obtained buoyancy regulator was 0.21 g / cm 3 . Using this buoyancy regulator, pellets were formed according to the method described above, and the sedimentation velocity was measured. Table 1 shows the results.
【００２３】（実施例３）実施例１で用いた多孔性球状
セルロース微粒子の代わりに、多孔性のケイ酸カルシウ
ム（フローライト （株）トクヤマ製、カサ密度０．２
０ｇ／ｃｍ3、粒径４ｍｍ）を用いた以外は、実施例１
と同様にして浮力調整剤を得た。得られた浮力調整剤の
カサ密度は０．２３ｇ／ｃｍ3であった。この浮力調整
剤を用いて、上記の方法にしたがってペレットを成形
し、沈降速度を測定した。その結果を表１に示す。Example 3 Instead of the porous spherical cellulose fine particles used in Example 1, a porous calcium silicate (manufactured by Fluorite Co., Ltd., Tokuyama, having a bulk density of 0.2
Example 1 except that 0 g / cm 3 and a particle size of 4 mm were used.
A buoyancy regulator was obtained in the same manner as described above. The bulk density of the obtained buoyancy regulator was 0.23 g / cm 3 . Using this buoyancy regulator, pellets were formed according to the method described above, and the sedimentation velocity was measured. Table 1 shows the results.
【００２４】（比較例１）浮力調整剤を用いない以外
は、実施例１に記載の方法と同様の方法でペレットを成
形し、沈降速度を測定した。その結果を表１に示す。Comparative Example 1 Pellets were formed in the same manner as in Example 1 except that no buoyancy regulator was used, and the sedimentation velocity was measured. Table 1 shows the results.
【００２５】（比較例２）実施例１で用いた多孔性球状
セルロース微粒子の代わりに、炭酸カルシウムを用いず
に作製した非多孔性の球状セルロース微粒子（カサ密度
１．０ｇ／ｃｍ3、粒径２００μｍ）を用いた以外は、
実施例１と同様にして浮力調整剤を得た。得られた浮力
調整剤のカサ密度は１．０ｇ／ｃｍ3であった。この浮
力調整剤を用いて、上記の方法にしたがってペレットを
成形し、沈降速度を測定した。その結果を表１に示す。(Comparative Example 2) Instead of the porous spherical cellulose fine particles used in Example 1, non-porous spherical cellulose fine particles produced without using calcium carbonate (bulk density: 1.0 g / cm 3 , particle size: 200 μm)
A buoyancy regulator was obtained in the same manner as in Example 1. The bulk density of the obtained buoyancy regulator was 1.0 g / cm 3 . Using this buoyancy regulator, pellets were formed according to the method described above, and the sedimentation velocity was measured. Table 1 shows the results.
【００２６】（比較例３）実施例３で用いたパラフィン
ワックスを用いない以外は、実施例３と同様にして浮力
調整剤を得た。得られた浮力調整剤のカサ密度は０．２
０ｇ／ｃｍ3であった。この浮力調整剤を用いて、上記
の方法にしたがってペレットを成形し、沈降速度を測定
した。その結果を表１に示す。Comparative Example 3 A buoyancy regulator was obtained in the same manner as in Example 3 except that the paraffin wax used in Example 3 was not used. The bulk density of the obtained buoyancy regulator is 0.2
It was 0 g / cm 3 . Using this buoyancy regulator, pellets were formed according to the method described above, and the sedimentation velocity was measured. Table 1 shows the results.
【００２７】[0027]
【表１】 [Table 1]
【００２８】[0028]
【発明の効果】この発明によると、多孔質体又は中空粒
子を用いるので、浮力調整剤のカサ密度を小さくするこ
とができ、農薬等の固形材料に混合して成形することに
より、得られる成形体に浮力を与えることができる。こ
のため、上記成形体の沈降速度を低減させることができ
る。According to the present invention, since the porous body or the hollow particles are used, the bulk density of the buoyancy regulator can be reduced, and the molding obtained by mixing with a solid material such as a pesticide and molding can be obtained. Can give buoyancy to the body. For this reason, the sedimentation speed of the compact can be reduced.
【００２９】また、上記成形体内に混合する浮力調整剤
の量を調整することにより、上記成形体の沈降速度を調
整することができる。The sedimentation speed of the molded body can be adjusted by adjusting the amount of the buoyancy regulator mixed in the molded body.
【００３０】さらに、上記疎水性物質で被覆するので、
浮力調整剤が水と接触しても、水が親水性の多孔質体又
は中空粒子と接触するのが抑制され、浮力調整剤が持つ
孔や中空部分に水が浸入して浮力がなくなるのを緩和で
きる。このため、長期にわたり、浮力調整効果を発揮で
きる。Further, since it is coated with the above-mentioned hydrophobic substance,
Even when the buoyancy adjuster comes into contact with water, the water is suppressed from contacting the hydrophilic porous body or the hollow particles, so that water enters the pores or hollow portions of the buoyancy adjuster and loses buoyancy. Can be relaxed. For this reason, the buoyancy adjustment effect can be exhibited for a long period of time.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｃ０８Ｌ 1:02 Ｃ０８Ｌ 1:02 Ｆターム(参考） 4F074 AA02 AA42 CE15 CE16 CE34 CE44 CE83 DA42 4H011 AA01 BA01 BB10 BC18 BC19 BC20 DA03 DH10 DH13 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) // C08L 1:02 C08L 1:02 F term (Reference) 4F074 AA02 AA42 CE15 CE16 CE34 CE44 CE83 DA42 4H011 AA01 BA01 BB10 BC18 BC19 BC20 DA03 DH10 DH13
Claims (5)
物質で被覆した浮力調整剤。1. A buoyancy regulator comprising a hydrophilic porous body or hollow particles coated with a hydrophobic substance.
ある請求項１に記載の浮力調整剤。2. The buoyancy regulator according to claim 1, wherein the bulk density is 0.1 to 0.7 g / cm 3 .
クス、高級脂肪酸、高級アルコール、セラック、シュガ
ーエステル又はセルロース誘導体から選ばれる請求項１
又は２に記載の浮力調整剤。3. The hydrophobic substance is selected from a rosin resin, a wax, a higher fatty acid, a higher alcohol, shellac, a sugar ester, and a cellulose derivative.
Or the buoyancy regulator according to 2.
ース、セルロース誘導体又はポリビニルアルコールの架
橋体から選ばれる水不溶性の親水性高分子、又は、珪酸
カルシウム、アルミナ、シリカゲルから選ばれる無機物
質である請求項１乃至３のいずれかに記載の浮力調整
剤。4. The porous body or the hollow particle is a water-insoluble hydrophilic polymer selected from cellulose, a cellulose derivative or a crosslinked product of polyvinyl alcohol, or an inorganic substance selected from calcium silicate, alumina, and silica gel. The buoyancy regulator according to any one of claims 1 to 3.
記載の浮力調整剤を混合、成形した浮力調整成形体。5. A buoyancy adjusting molded body obtained by mixing and molding the buoyancy adjusting agent according to claim 1 into a solid material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001150474A JP2002338405A (en) | 2001-05-21 | 2001-05-21 | Buoyancy-adjusting agent and buoyancy-adjusted formed material by using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001150474A JP2002338405A (en) | 2001-05-21 | 2001-05-21 | Buoyancy-adjusting agent and buoyancy-adjusted formed material by using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002338405A true JP2002338405A (en) | 2002-11-27 |
Family
ID=18995475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001150474A Pending JP2002338405A (en) | 2001-05-21 | 2001-05-21 | Buoyancy-adjusting agent and buoyancy-adjusted formed material by using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002338405A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112352024A (en) * | 2018-06-29 | 2021-02-09 | 气凝胶有限公司 | Encapsulated biocides and biological repellents |
-
2001
- 2001-05-21 JP JP2001150474A patent/JP2002338405A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112352024A (en) * | 2018-06-29 | 2021-02-09 | 气凝胶有限公司 | Encapsulated biocides and biological repellents |
| CN112352024B (en) * | 2018-06-29 | 2023-11-03 | 气凝胶有限公司 | Encapsulated biocides and biostimulants |
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