JPH02261804A - Preparation of spherical particle - Google Patents
Preparation of spherical particleInfo
- Publication number
- JPH02261804A JPH02261804A JP8236189A JP8236189A JPH02261804A JP H02261804 A JPH02261804 A JP H02261804A JP 8236189 A JP8236189 A JP 8236189A JP 8236189 A JP8236189 A JP 8236189A JP H02261804 A JPH02261804 A JP H02261804A
- Authority
- JP
- Japan
- Prior art keywords
- polymerizable monomer
- soluble initiator
- oil
- particles
- calcium phosphate
- 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.)
- Granted
Links
- 239000012798 spherical particle Substances 0.000 title claims abstract description 15
- 239000000178 monomer Substances 0.000 claims abstract description 32
- 239000002245 particle Substances 0.000 claims abstract description 30
- 239000003999 initiator Substances 0.000 claims abstract description 26
- 230000037303 wrinkles Effects 0.000 claims abstract description 17
- 229910000389 calcium phosphate Inorganic materials 0.000 claims abstract description 16
- 239000001506 calcium phosphate Substances 0.000 claims abstract description 16
- 235000011010 calcium phosphates Nutrition 0.000 claims abstract description 16
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims abstract description 16
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 9
- 229920000642 polymer Polymers 0.000 claims abstract description 3
- 239000012736 aqueous medium Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000000725 suspension Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000009775 high-speed stirring Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract description 6
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 abstract description 4
- 229910001870 ammonium persulfate Inorganic materials 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 abstract description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 abstract description 2
- 239000004342 Benzoyl peroxide Substances 0.000 abstract description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 abstract description 2
- 239000003463 adsorbent Substances 0.000 abstract description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 abstract description 2
- 239000003456 ion exchange resin Substances 0.000 abstract description 2
- 229920003303 ion-exchange polymer Polymers 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 abstract description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 abstract 1
- 230000000379 polymerizing effect Effects 0.000 abstract 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- VAZSKTXWXKYQJF-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)OOS([O-])=O VAZSKTXWXKYQJF-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 1
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 1
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- -1 benzoyl peroxide Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- LRDFRRGEGBBSRN-UHFFFAOYSA-N isobutyronitrile Chemical compound CC(C)C#N LRDFRRGEGBBSRN-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F12/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F12/02—Monomers containing only one unsaturated aliphatic radical
- C08F12/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F12/06—Hydrocarbons
- C08F12/08—Styrene
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
この発明は球状粒子の製造方法に関する。さらに詳しく
は融状表面を宵する球状粒子の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a method for producing spherical particles. More specifically, the present invention relates to a method for producing spherical particles having a molten surface.
（ロ）従来の技術及び拝題
従来、球状粒子の表面積を大きくする方法として特に多
孔性粒子とする乙のが多数提案されており、吸着剤やイ
オン交換樹脂として重用されている。しかしながらこれ
ら多孔性粒子ではほぼ中心部まで穴がおいているために
強度的に大変脆いという欠点がある。(B) Prior art and subject matter In the past, many methods have been proposed to increase the surface area of spherical particles, particularly by making them porous particles, which are used extensively as adsorbents and ion exchange resins. However, these porous particles have holes almost all the way to the center, so they have the disadvantage of being extremely brittle in terms of strength.
一方、粒子表面を凹凸状にして表面積を大きくする方法
が若干知られている。この方法としては、例えば特開昭
６０−２８４０２号公報に記載のものが挙げられる。On the other hand, some methods are known in which the particle surface is made uneven to increase the surface area. Examples of this method include the method described in JP-A-60-28402.
しかしながら、上記方法による粒子の製造には有機溶剤
を使用するため、その有機溶剤の除去に困難を要してい
る。However, since an organic solvent is used in the production of particles by the above method, it is difficult to remove the organic solvent.
この発明は上記問題点に鑑みてなされたものであり、有
機溶剤を用いることなく強度的に強くかつ表面積の大き
な粒子を製造する方法を提供しようとするものである。This invention has been made in view of the above problems, and aims to provide a method for producing particles that are strong and have a large surface area without using organic solvents.
（ハ）課題を解決するための手段及び作用かくしてこの
発明によれば、リン酸カルシウムを含有する水性媒体中
に、油相としての重合性単量体が分散され、かつこの水
性媒体中に水溶性開始剤が、及び分散された重合性単量
体中に油溶性開始剤が各々含有されてなる懸濁液を調製
し、この懸濁液を高速撹拌下で上記重合性単量体の重合
条件に付すことにより、重合性単量体の重合を分散状聾
で進行させて表面に多数の皺が形成された重合体球状粒
子を得ることを特徴とする球状粒子の製造方法が提供さ
れる。(c) Means and action for solving the problems Thus, according to the present invention, a polymerizable monomer as an oil phase is dispersed in an aqueous medium containing calcium phosphate, and a water-soluble monomer is dispersed in this aqueous medium. A suspension containing an oil-soluble initiator and an oil-soluble initiator in a dispersed polymerizable monomer is prepared, and this suspension is subjected to the polymerization conditions of the above polymerizable monomer under high-speed stirring. By attaching the present invention, a method for producing spherical particles is provided, which is characterized in that polymerization of a polymerizable monomer proceeds in a dispersed manner to obtain polymer spherical particles having a large number of wrinkles formed on the surface.
この発明の方法においてリン酸カルシウムは分散剤とし
て用いられる。Calcium phosphate is used as a dispersant in the method of this invention.
この発明に用いられる重合性単量体としては、重合性ビ
ニル系単量体が好ましく、例えばアクリロニトリル、メ
タクリロニトリル等のニトリル系単量体、スチレン、α
−メチルスチレン等のスチレン系単量体、ビニルトルエ
ン、塩化ビニル、アクリルアミド等が挙げられる。これ
らの単量体は単独または２種以上の混合物で用いられて
もよい。The polymerizable monomer used in this invention is preferably a polymerizable vinyl monomer, such as nitrile monomers such as acrylonitrile and methacrylonitrile, styrene, α
- Styrenic monomers such as methylstyrene, vinyltoluene, vinyl chloride, acrylamide, and the like. These monomers may be used alone or in a mixture of two or more.
この発明に用いられる水溶性開始剤としては、過硫酸ア
ンモニウム、過硫酸カリウム、過硫酸ナトリウム等が挙
げられる。Examples of the water-soluble initiator used in this invention include ammonium persulfate, potassium persulfate, and sodium persulfate.
この発明に用いられる油溶性開始剤としては、上記重合
性単量体に可溶なものであればよく、例えば通常使用さ
れる２、２′−アゾヒス（イソブチロニトリル）、２．
２−アゾビス（２，４−ジメチルバレロニトリル）等の
アゾ系化合物、過酸化ベンゾイル、過酸化ラウロイル等
の過酸化物等が挙げられる。The oil-soluble initiator used in this invention may be any initiator as long as it is soluble in the above-mentioned polymerizable monomer, such as the commonly used 2,2'-azohis (isobutyronitrile), 2.
Examples include azo compounds such as 2-azobis(2,4-dimethylvaleronitrile), peroxides such as benzoyl peroxide, and lauroyl peroxide.
この発明において、上記リン酸カルシウム、重合性単量
体、水溶性開始剤及び油溶性開始剤は、それぞれが所定
量で水性媒体中に混合される。In this invention, the calcium phosphate, polymerizable monomer, water-soluble initiator, and oil-soluble initiator are mixed in predetermined amounts in an aqueous medium.
上記リン酸カルシウムは重合性単量体に対して０．１〜
２０重量％、好ましくは１〜１５重量％の範囲で用いら
れる。この場合０．１重量％に満たないときは得られる
粒子表面に所望の皺が生じなく、方２０重量％を越える
と液の粘度が高くなりすぎて重合性単量体の分散が不良
になる。 上記水溶性開始剤は重合性単量体に対して０
．０１〜０３重量％、好ましくは０．０５〜０．２重量
％の範囲で用いられる。The above calcium phosphate is 0.1 to 0.1 to the polymerizable monomer.
It is used in an amount of 20% by weight, preferably 1 to 15% by weight. In this case, if it is less than 0.1% by weight, the desired wrinkles will not be formed on the surface of the obtained particles, and if it exceeds 20% by weight, the viscosity of the liquid will become too high and the dispersion of the polymerizable monomer will be poor. . The above water-soluble initiator is 0% relative to the polymerizable monomer.
．． It is used in a range of 0.01 to 0.3% by weight, preferably 0.05 to 0.2% by weight.
この場合０．０１重量％に満たないときは最終的に得ら
れる粒子表面に所望の皺が生じなく、一方０．３重量％
を越えると粒子が中空状態でかつ粒子表面に所望の皺が
生じない。In this case, if the amount is less than 0.01% by weight, the desired wrinkles will not be formed on the final particle surface;
If it exceeds this, the particles will be in a hollow state and the desired wrinkles will not be formed on the particle surface.
この発明において水系媒体中への上記リン酸カルシウム
、重合性単量体、水溶性開始剤及び油溶性開始剤の添加
・混合は、リン酸カルシウムを含有する水性媒体中に、
油相としての重合性単量体が分散され、かつこの水性媒
体中に水溶性開始剤が、及び分散された重合性単量体中
に油溶性開始剤が各々含有されてた懸濁液が調製される
ように行われる。この場合、水系媒体中に分散された重
合性単量体が重合条件に付される前に、この水系媒体中
に上記リン酸カルシウム、重合性単量体、水溶性開始剤
及び油溶性開始剤の各所定量が混合されてさえいればよ
く、従って水系媒体中に上記リン酸カルシウム、重合性
単量体、水溶性開始剤及び油溶性開始剤が一度に混合さ
れるものであってもよく、また、水系媒体中にまずリン
酸カルシウムを添加した後、重合性単量体、水溶性開始
剤及び油溶性開始剤を添加するものであってもよく、さ
らにまた、リン酸カルシウム及び水溶性開始剤を水性媒
体中に添加しておき、ここに油溶性開始剤を含む重合性
開始剤を添加するものであってらよい。 上記懸濁液に
おける重合性単量体の分散は、高速撹拌により達成され
る。この高速撹拌の条件は最終的に得られる粒子の表面
状態に影響を及ぼすｌ因と考えられるので、撹拌翼の先
端の周速度が少なくとも２．３ｍ／ｓ以上である高速撹
拌が適している。詳しくは実施例の記載が参照される。In this invention, the above-mentioned calcium phosphate, polymerizable monomer, water-soluble initiator, and oil-soluble initiator are added and mixed into the aqueous medium containing calcium phosphate,
A suspension in which a polymerizable monomer as an oil phase is dispersed, a water-soluble initiator contained in this aqueous medium, and an oil-soluble initiator contained in the dispersed polymerizable monomer is prepared. Done as prepared. In this case, before the polymerizable monomer dispersed in the aqueous medium is subjected to polymerization conditions, the calcium phosphate, the polymerizable monomer, the water-soluble initiator, and the oil-soluble initiator are added to each part of the aqueous medium. It is only necessary that a fixed amount of the calcium phosphate, polymerizable monomer, water-soluble initiator, and oil-soluble initiator be mixed in the aqueous medium at the same time. After adding calcium phosphate to the aqueous medium, the polymerizable monomer, water-soluble initiator, and oil-soluble initiator may be added.Furthermore, calcium phosphate and the water-soluble initiator may be added to the aqueous medium. It is sufficient that a polymerization initiator containing an oil-soluble initiator is added thereto. Dispersion of the polymerizable monomer in the suspension is achieved by high-speed stirring. Since the conditions for this high-speed stirring are considered to be a factor influencing the surface condition of the particles finally obtained, high-speed stirring in which the circumferential speed of the tip of the stirring blade is at least 2.3 m/s or more is suitable. For details, refer to the description of the examples.
上記のごとく得られろ懸濁液は、分散された油相である
重合性単量体の重合条件に付される。この条件としては
、懸濁液を５０〜９０℃、好ましくは５５〜８０℃の温
度に加熱する等が挙げられる。The suspension obtained as described above is subjected to polymerization conditions for the dispersed oil phase of the polymerizable monomer. Examples of this condition include heating the suspension to a temperature of 50 to 90°C, preferably 55 to 80°C.
この発明の方法において、上記懸濁重合終了後常法に従
って、口利、水洗浄、脱水、乾燥することにより、融状
の表面を有する球状粒子が得られる。In the method of the present invention, after the above suspension polymerization is completed, spherical particles having a molten surface are obtained by washing with water, dehydration, and drying according to conventional methods.
（ニ）実施例
以下実施例によりこの発明の詳細な説明するが、これに
よりこの発明は限定されるらのではない。(d) Examples The present invention will be explained in detail with reference to Examples below, but the present invention is not limited thereby.
実施例１
５Ｑオートクレーブ中に、水３２００ ｇ、リン酸カル
シウム３２ｇ１過硫酸カリウム０．８０ｇ、アゾビスイ
ソブチロニトリル８ｇ１スチレン８００ｇを仕込み、温
度７０℃の条件下、周速度３．７ｍ／ｓにおいて１０時
間！！％濁重合に付した。４０℃に冷却後、口過、洗浄
、乾燥を行い、球状粒子を得た。Example 1 In a 5Q autoclave, 3200 g of water, 32 g of calcium phosphate, 0.80 g of potassium persulfate, 8 g of azobisisobutyronitrile, and 800 g of styrene were charged and heated at a temperature of 70°C and a peripheral speed of 3.7 m/s for 10 hours. ! ! % turbidity polymerization. After cooling to 40° C., filtration, washing and drying were performed to obtain spherical particles.
上記球状粒子を電子顕微鏡写真（倍率２０００倍）で観
察したところ、規則正しく皺が刻まれた表面を有するし
のであった。この写真を第１図として添付する。またこ
の皺の深さは５〜ＩＯμｍであった。When the above-mentioned spherical particles were observed using an electron microscope photograph (magnification: 2000 times), they were found to have a surface with regular wrinkles. This photograph is attached as Figure 1. Moreover, the depth of this wrinkle was 5 to IO μm.
実施例２
リン酸カルシウムの使用量を８０ｇに変える以外は実施
例１と同様にして粒子を製造した。Example 2 Particles were produced in the same manner as in Example 1 except that the amount of calcium phosphate used was changed to 80 g.
得られた粒子は表面に皺を有するものであり、平均粒径
３５μｍで、実施例！で得られたものよりも皺の数が多
いものであった。The obtained particles had wrinkles on the surface and had an average particle size of 35 μm. The number of wrinkles was greater than that obtained in .
実施例３
過硫酸カリウムの使用量を０．４０ｇに変える以外は実
施例１と同様にして粒子を製造した。Example 3 Particles were produced in the same manner as in Example 1 except that the amount of potassium persulfate used was changed to 0.40 g.
得られた粒子は表面に皺を有するものであり、平均粒径
５０μｍで、実施例１で得られたものよりも皺の深さが
浅いものでありｆこ。The obtained particles had wrinkles on the surface, had an average particle size of 50 μm, and had shallower wrinkles than those obtained in Example 1.
実施例４
過硫酸カリウム０．８０ｇに変えて、過硫酸アンモニウ
ム０．８Ｑ、を用いる以外は実施例１と同様にして粒子
を製造した。Example 4 Particles were produced in the same manner as in Example 1, except that 0.8Q of ammonium persulfate was used instead of 0.80g of potassium persulfate.
得られた粒子は表面に皺を有するものであり、平均粒径
３０μｍで、表面状態は実施例１で得られたものとほぼ
同様なものであった。The obtained particles had wrinkles on the surface, had an average particle size of 30 μm, and had a surface condition almost similar to that obtained in Example 1.
比較例１
リン酸カルシウムの使用量を０．４ｇ変える以外は実施
例１と同様にして粒子を製造した。Comparative Example 1 Particles were produced in the same manner as in Example 1 except that the amount of calcium phosphate used was changed by 0.4 g.
得られた粒子には、その表面に皺が形成されていなかっ
た。The obtained particles had no wrinkles formed on their surfaces.
比較例２
過硫酸カリウムの使用量を４ｇに変える以外は実施例１
と同様にして粒子を製造した。Comparative Example 2 Example 1 except that the amount of potassium persulfate used was changed to 4 g
Particles were produced in the same manner.
得られた粒子には、その表面に皺が形成されていなく、
さらに強度の弱い中空粒子てあった。The obtained particles have no wrinkles formed on their surfaces,
There were also hollow particles with even weaker strength.
比較例３
周速度を１．８ｍ／ｓに変更する以外は実施例Ｉ同様に
して粒子を製造した。Comparative Example 3 Particles were produced in the same manner as in Example I except that the peripheral speed was changed to 1.8 m/s.
得られた粒子には、その表面に皺が形成されていなかっ
た。The obtained particles had no wrinkles formed on their surfaces.
以上のことから、この実施例１〜４の方法によれば、表
面に皺が形成されかつ内部が充填された強度のつよい球
状粒子を得ることができる。From the above, according to the methods of Examples 1 to 4, strong spherical particles with wrinkles formed on the surface and filled inside can be obtained.
（ホ）発明の効果
この発明によれば、層状の表面を有する表面積の大きい
球状粒子を得ることができる。またこの方法によれば有
侵溶剤を用いないので、極めて簡便に鼓状粒子を得るこ
とができる。またさらにこの発明によれば、内部が充填
された強度の強い鼓状粒子を得ることができる。(E) Effects of the Invention According to the present invention, spherical particles having a layered surface and a large surface area can be obtained. Moreover, according to this method, since no invasive solvent is used, it is possible to obtain drum-shaped particles very easily. Furthermore, according to the present invention, it is possible to obtain strong drum-shaped particles whose interior is filled.
第１図はこの発明の方法により製造される球状粒子の一
例の表面構造を写真で示す図である。
第 １ 図FIG. 1 is a photograph showing the surface structure of an example of spherical particles produced by the method of the present invention. Figure 1
Claims (1)
しての重合性単量体が分散され、かつこの水性媒体中に
水溶性開始剤が、及び分散された重合性単量体中に油溶
性開始剤が各々含有されてなる懸濁液を調製し、この懸
濁液を高速撹拌下で上記重合性単量体の重合条件に付す
ことにより、重合性単量体の重合を分散状態で進行させ
て表面に多数の皺が形成された重合体球状粒子を得るこ
とを特徴とする球状粒子の製造方法。1. A polymerizable monomer as an oil phase is dispersed in an aqueous medium containing calcium phosphate, and a water-soluble initiator is added to the aqueous medium, and an oil-soluble initiator is added to the dispersed polymerizable monomer. By preparing a suspension containing each of the agents and subjecting this suspension to the polymerization conditions for the polymerizable monomer described above under high-speed stirring, the polymerization of the polymerizable monomer proceeds in a dispersed state. A method for producing spherical particles, the method comprising obtaining spherical polymer particles having a large number of wrinkles formed on the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8236189A JPH0637525B2 (en) | 1989-03-31 | 1989-03-31 | Method for producing spherical particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8236189A JPH0637525B2 (en) | 1989-03-31 | 1989-03-31 | Method for producing spherical particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02261804A true JPH02261804A (en) | 1990-10-24 |
| JPH0637525B2 JPH0637525B2 (en) | 1994-05-18 |
Family
ID=13772442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8236189A Expired - Lifetime JPH0637525B2 (en) | 1989-03-31 | 1989-03-31 | Method for producing spherical particles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0637525B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009029953A (en) * | 2007-07-27 | 2009-02-12 | Jsp Corp | Method for producing vinyl resin particle |
| JP2016132762A (en) * | 2015-01-22 | 2016-07-25 | コニカミノルタ株式会社 | Hollow resin particle and production method of the same |
-
1989
- 1989-03-31 JP JP8236189A patent/JPH0637525B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009029953A (en) * | 2007-07-27 | 2009-02-12 | Jsp Corp | Method for producing vinyl resin particle |
| JP2016132762A (en) * | 2015-01-22 | 2016-07-25 | コニカミノルタ株式会社 | Hollow resin particle and production method of the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0637525B2 (en) | 1994-05-18 |
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