JP2001114902A - Coagulating method of resin particles - Google Patents

Coagulating method of resin particles

Info

Publication number
JP2001114902A
JP2001114902A JP29369999A JP29369999A JP2001114902A JP 2001114902 A JP2001114902 A JP 2001114902A JP 29369999 A JP29369999 A JP 29369999A JP 29369999 A JP29369999 A JP 29369999A JP 2001114902 A JP2001114902 A JP 2001114902A
Authority
JP
Japan
Prior art keywords
resin particles
water
particles
hydrophobic
polymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP29369999A
Other languages
Japanese (ja)
Inventor
Misao Horigome
操 堀米
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DIC Corp
Original Assignee
Dainippon Ink and Chemicals Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dainippon Ink and Chemicals Co Ltd filed Critical Dainippon Ink and Chemicals Co Ltd
Priority to JP29369999A priority Critical patent/JP2001114902A/en
Publication of JP2001114902A publication Critical patent/JP2001114902A/en
Pending legal-status Critical Current

Links

Landscapes

  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a method for coagulating resin particles that is capable of redispersing easily the resin particles after coagulation. SOLUTION: The coagulating method for hydrophobic resin particles comprises adding the resin particles in a dispersing liquid with a water-soluble polymer having hydrophobic groups at both terminals of the molecule in a concentration of the water-soluble polymer of 0.3-1.6 wt.% in the aqueous dispersion of the hydrophobic polymer particles. The redispersing method for redispersing the coagulated spherical resin particles comprises controlling the concentration of the water-soluble polymer having hydrophobic groups at both terminals of the molecule outside the above-described concentration range in the mixture containing the coagulated hydrophobic resin particles obtained by the coagulating method.

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、水中に分散した疎
水性粒子を凝集・分離する方法、ならびに当該方法を用
いて凝集した樹脂粒子を再分散させる方法に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for aggregating and separating hydrophobic particles dispersed in water, and a method for redispersing resin particles aggregated by using the method.

【０００２】[0002]

【従来の技術】水中に分散した粒子を分離する方法とし
ては、遠心分離による方法、凝集剤による方法、などが
知られている。遠心分離による方法は、粒子と水との比
重差を利用して分離するものである。凝集剤による方法
としては、電解質を添加して粒子表面のζ電位を低下さ
せて凝集する方法、分子量の10,000以上のポリマーを加
えて、ポリマー鎖の吸着力による架橋によって凝集させ
る方法が知られている。2. Description of the Related Art As a method for separating particles dispersed in water, a method using centrifugal separation, a method using a flocculant, and the like are known. The method using centrifugation separates particles using a specific gravity difference between particles and water. As a method using an aggregating agent, a method of adding an electrolyte to lower the ζ potential of the particle surface to perform aggregation, and a method of adding a polymer having a molecular weight of 10,000 or more and performing aggregation by crosslinking by the adsorption force of a polymer chain are known. I have.

【０００３】凝集剤として用いる電解質としては、無機
塩、イオン性の界面活性剤、などが挙げられ、ポリマー
系の凝集剤としては、例えば、ポリアクリルアミド、ポ
リビニルピリジン、ポリアクリル酸ソーダ、ポリビニル
アルコール、などが挙げられる。Examples of the electrolyte used as the flocculant include inorganic salts and ionic surfactants. Examples of the polymer flocculant include polyacrylamide, polyvinylpyridine, sodium polyacrylate, polyvinyl alcohol, and the like. And the like.

【０００４】[0004]

【発明が解決しようとする課題】従来の遠心分離による
方法では、水と粒子との比重差が大きくないと分離が困
難であるという問題点がある。また、ポリマー系の凝集
剤を添加する方法では、凝集剤として分子量の高いポリ
マーを用いるため、ポリマー濃度を高くできないので、
完全な凝集・分離は困難である。また、従来の方法は、
いずれの方法でも凝集した粒子を再分散させるのは非常
に困難であった。The conventional centrifugal separation method has a problem that the separation is difficult unless the difference in specific gravity between water and particles is large. In addition, in the method of adding a polymer-based flocculant, since a polymer having a high molecular weight is used as the flocculant, the polymer concentration cannot be increased.
Complete aggregation / separation is difficult. Also, the conventional method is
It was very difficult to redisperse the aggregated particles by either method.

【０００５】本発明が解決しようとする課題は、凝集後
の樹脂粒子を容易に再分散させることができる樹脂粒子
の凝集方法を提供することにある。[0005] An object of the present invention is to provide a method for aggregating resin particles which can easily redisperse the resin particles after aggregation.

【０００６】[0006]

【課題を解決するための手段】本発明者は、上記課題を
解決するために、鋭意検討を行った結果、（Ｉ）疎水性
樹脂粒子の水分散液に、分子の複数の末端に疎水基を有
する水溶性ポリマーを添加することによって、水溶性ポ
リマーの末端の疎水基が疎水性樹脂粒子の表面に吸着す
るが、特定のポリマー濃度範囲において、一本のポリマ
ー鎖の疎水基のうち一つの末端が１個の粒子に、もう一
つの末端が他の粒子に吸着しブリッジを形成する。この
ようなブリッジが複数個の粒子間に形成されることによ
り、水中に分散した疎水性樹脂粒子が凝集し、水相と粒
子の凝集相とに分離すること、ならびに、（II）以上の
方法により凝集した疎水性樹脂粒子は、凝集に用いた水
溶性ポリマー濃度を０．３〜１．６重量％の範囲外に調
整することにより、粒子表面に吸着したポリマーの疎水
性末端が一定の時間で吸脱着を繰り返すため、当該濃度
範囲外ではブリッジが切断され、容易に再分散するこ
と、を見出し、本発明を完成するに至った。Means for Solving the Problems The present inventors have conducted intensive studies in order to solve the above-mentioned problems. As a result, (I) an aqueous dispersion of hydrophobic resin particles has hydrophobic groups at a plurality of terminals of a molecule. By adding a water-soluble polymer having, the hydrophobic group at the terminal of the water-soluble polymer is adsorbed on the surface of the hydrophobic resin particles, but within a specific polymer concentration range, one of the hydrophobic groups of one polymer chain is used. One end adsorbs to one particle and the other end adsorbs to other particles to form a bridge. By forming such a bridge between a plurality of particles, the hydrophobic resin particles dispersed in water are aggregated and separated into an aqueous phase and an aggregated phase of particles. By adjusting the concentration of the water-soluble polymer used for the aggregation outside the range of 0.3 to 1.6% by weight, the hydrophobic terminal of the polymer adsorbed on the particle surface can be maintained for a certain period of time. In addition, the inventors found that the bridge was cut out of the concentration range and easily redispersed outside the above concentration range, and completed the present invention.

【０００７】即ち、本発明は上記課題を解決するため
に、（Ｉ）疎水性樹脂粒子の水分散液に、分子の両末端
に疎水基を有する水溶性ポリマー（以下、「本発明で用
いる水溶性ポリマー」という。）を濃度０．３〜１．６
重量％の範囲で加えることによって分散液中の樹脂粒子
を凝集させる疎水性樹脂粒子の凝集方法を提供する。That is, in order to solve the above-mentioned problems, the present invention provides (I) a water-soluble polymer having hydrophobic groups at both ends of a molecule (hereinafter referred to as “water-soluble polymer used in the present invention”). ) And a concentration of 0.3 to 1.6.
Provided is a method for aggregating hydrophobic resin particles in which the resin particles in a dispersion liquid are aggregated by adding them in the range of weight%.

【０００８】また、本発明は上記課題を解決するため
に、（II）上記（Ｉ）に記載の凝集方法によって得られ
た凝集した疎水性樹脂粒子を含む混合物を、分子の両末
端に疎水基を有する水溶性線状ポリマーの濃度が上記
（Ｉ）に記載の濃度範囲外となるように調整することに
よって、凝集した疎水性樹脂粒子を再分散させる疎水性
樹脂粒子の再分散方法を提供する。In order to solve the above-mentioned problems, the present invention provides (II) a method comprising the step of mixing a mixture containing the aggregated hydrophobic resin particles obtained by the aggregation method described in the above (I) with a hydrophobic group at both ends of the molecule. By adjusting the concentration of the water-soluble linear polymer having the above to be outside the concentration range described in the above (I), a method for redispersing the hydrophobic resin particles by which the aggregated hydrophobic resin particles are redispersed is provided. .

【０００９】[0009]

【発明の実施の形態】本発明で用いる水溶性ポリマー
は、その末端が、疎水性を示すもので有れば、直鎖、分
岐、環状、あるいはこの組み合わせのいずれであっても
良い。また、本発明で用いる水溶性ポリマーは、その主
鎖部分が、水溶性を示すものであれば、その種類、分子
量の範囲は任意である。さらに、その主鎖部分は、直鎖
状、分岐状のいずれでも良いが２個以上の末端に疎水基
を有する必要がある。BEST MODE FOR CARRYING OUT THE INVENTION The water-soluble polymer used in the present invention may be linear, branched, cyclic, or a combination thereof as long as its terminal shows hydrophobicity. The type and molecular weight of the water-soluble polymer used in the present invention are not limited as long as the main chain thereof is water-soluble. Further, the main chain portion may be linear or branched, but needs to have a hydrophobic group at two or more terminals.

【００１０】本発明で用いる水溶性ポリマーとしては、
例えば、下記一般式（１）〜（５）で表わされるような
ポリエチレングリコールをウレタン結合で伸長し、末端
に炭化水素基を付与したポリマーが挙げられる。The water-soluble polymer used in the present invention includes:
For example, a polymer in which polyethylene glycol represented by the following general formulas (1) to (5) is extended by a urethane bond and a hydrocarbon group is provided at a terminal is exemplified.

【００１１】一般式（１）General formula (1)

【化１】 Embedded image

【００１２】（式中、ＲおよびＲ’は各々独立的に炭素
原子数８〜２０のアルキル基を表わし、Ｒ”は、炭素原
子数５〜５０のアルキレン鎖を表わし、Ｘは５０〜５０
０の整数を表わし、ｎは１〜５の整数を表わす。）Wherein R and R ′ each independently represent an alkyl group having 8 to 20 carbon atoms, R ″ represents an alkylene chain having 5 to 50 carbon atoms, and X represents 50 to 50 carbon atoms.
N represents an integer of 0, and n represents an integer of 1 to 5. )

【００１３】一般式（２）General formula (2)

【化２】 Embedded image

【００１４】（式中、Ｒは炭素原子数８〜２０のアルキ
ル基を表わし、Ｒ’は各独立的に炭素原子数８〜２０の
アルキル基を表わし、Ｒ''' は炭素原子数７〜１５のア
リルアルキレン鎖を表わし、Ｘは５０〜５００の整数を
表わし、ｎは１〜５の整数を表わす。）(Wherein, R represents an alkyl group having 8 to 20 carbon atoms, R ′ independently represents an alkyl group having 8 to 20 carbon atoms, and R ′ ″ represents 7 to 20 carbon atoms. 15 represents an allylalkylene chain, X represents an integer of 50 to 500, and n represents an integer of 1 to 5.)

【００１５】一般式（３）General formula (3)

【化３】 Embedded image

【００１６】（式中、Ｒは炭素原子数８〜２０のアルキ
ル基を表わし、Ｒ’は各独立的に炭素原子数８〜２０の
アルキル基を表わし、Ｒ''' は炭素原子数７〜１５のア
リルアルキレン鎖を表わし、Ｘは５０〜５００の整数を
表わし、ｎは１〜５の整数を表わす。）(Wherein, R represents an alkyl group having 8 to 20 carbon atoms, R ′ independently represents an alkyl group having 8 to 20 carbon atoms, and R ′ ″ represents 7 to 20 carbon atoms. 15 represents an allylalkylene chain, X represents an integer of 50 to 500, and n represents an integer of 1 to 5.)

【００１７】一般式（４）General formula (4)

【化４】 Embedded image

【００１８】（式中、Ｒは炭素原子数８〜２０のアルキ
ル基を表わし、Ｒ’は炭素原子数５〜１５のアルキレン
鎖を表わし、Ｘは５０〜１５０の整数を表わし、ｙは１
０〜２００の整数を表わし、ｎは１〜５の整数を表わ
す。）Wherein R represents an alkyl group having 8 to 20 carbon atoms, R ′ represents an alkylene chain having 5 to 15 carbon atoms, X represents an integer of 50 to 150, and y represents 1
N represents an integer of 0 to 200, and n represents an integer of 1 to 5. )

【００１９】一般式（５）General formula (5)

【化５】 Embedded image

【００２０】（式中、Ｒは炭素原子数４〜２０のアルキ
ル基を表わし、Ｒ”は炭素原子数７〜１５のアリルアル
キレン鎖を表わし、Ｒ''' は炭素原子数５〜１５のアル
キレン鎖を表わし、Ｘは５０〜５００の整数を表わし、
ｎは１〜５の整数を表わす。）(Wherein R represents an alkyl group having 4 to 20 carbon atoms, R ″ represents an allylalkylene chain having 7 to 15 carbon atoms, and R ′ ″ represents an alkylene chain having 5 to 15 carbon atoms. X represents an integer of 50 to 500;
n represents an integer of 1 to 5. )

【００２１】本発明の凝集方法に適用できる粒子は、水
中に分散した状態であり、その表面が疎水性を示す必要
がある。粒子の材質、形状、大きさは問わない。本発明
においては、遠心沈降による分離が困難となる１μｍ以
下の微粒子が好ましい。また、比重が水に近い樹脂微粒
子の水分散液であっても、本発明の方法により、樹脂微
粒子の凝集・分離が可能である。The particles applicable to the agglomeration method of the present invention are in a state of being dispersed in water, and the surface thereof needs to exhibit hydrophobicity. The material, shape and size of the particles are not limited. In the present invention, fine particles having a size of 1 μm or less, which make separation by centrifugal sedimentation difficult, are preferred. Further, even in the case of an aqueous dispersion of fine resin particles having a specific gravity close to that of water, the method of the present invention enables the aggregation and separation of fine resin particles.

【００２２】本発明の凝集方法に適用できる樹脂微粒子
としては、公知の樹脂ラテックス類、例えば、重付加系
ポリマーのラテックス、縮合系ポリマーのラテックス、
ビニル重合体のラテックス、などが挙げられる。重付加
系ポリマーとしては、ポリウレタン樹脂、が挙げられ
る。縮合系ポリマーとしては、ポリエステル樹脂、ポリ
アミド系の樹脂、が挙げられる。ビニル重合体として
は、アクリル系樹脂、スチレン系樹脂、酢酸ビニル系樹
脂、ブタジエン系樹脂、あるいはこれらの共重合体が挙
げられる。本発明の凝集方法では、表面の疎水性の強い
樹脂、例えば、アクリル酸エステル、メタクリル酸エス
テル、スチレンのホモポリマーあるいはこれらのコポリ
マー、などが好適である。The resin fine particles applicable to the agglomeration method of the present invention include known resin latexes, for example, a latex of a polyaddition polymer, a latex of a condensation polymer,
Latex of vinyl polymer, and the like. Examples of the polyaddition polymer include a polyurethane resin. Examples of the condensation polymer include a polyester resin and a polyamide resin. Examples of the vinyl polymer include an acrylic resin, a styrene resin, a vinyl acetate resin, a butadiene resin, and a copolymer thereof. In the agglomeration method of the present invention, a resin having a strongly hydrophobic surface, for example, an acrylate ester, a methacrylate ester, a homopolymer of styrene, or a copolymer thereof is suitable.

【００２３】本発明の凝集方法を用いて凝集させた樹脂
微粒子を含む混合物を再分散させるには、混合物中の本
発明で用いる水溶性ポリマーの濃度を０．３重量％未満
の濃度あるいは１．６重量％を超える濃度に調整すれば
良い。そのような濃度調整の方法としては、本発明で用
いる水溶性ポリマーを追加する、あるいは水を追加す
る、などの方法が挙げられる。In order to re-disperse the mixture containing the resin fine particles aggregated by the aggregation method of the present invention, the concentration of the water-soluble polymer used in the present invention in the mixture is less than 0.3% by weight or 1. The concentration may be adjusted to more than 6% by weight. Examples of such a method of adjusting the concentration include a method of adding a water-soluble polymer used in the present invention or a method of adding water.

【００２４】[0024]

【実施例】以下、実施例を用いて本発明を更に詳細に説
明するが、本発明は実施例の範囲に限定されるものでは
ない。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the scope of the examples.

【００２５】＜実施例１＞数平均粒径が２５０ｎｍで比
重が１．２のポリ（メタ）アクリレート粒子の１０容量
％水分散液に、直鎖状で両末端に疎水基を有する水溶性
ウレタンポリマー（ローム＆ハース社製の「プライマル
ＲＭ８２５」）を１重量％添加した。混合後、２分で凝
集し、水相と粒子の凝集相に分離した。Example 1 A 10% by volume aqueous dispersion of poly (meth) acrylate particles having a number average particle size of 250 nm and a specific gravity of 1.2 was added to a linear, water-soluble urethane having hydrophobic groups at both ends. 1% by weight of a polymer (“Primal RM825” manufactured by Rohm & Haas) was added. After mixing, they aggregated in 2 minutes and separated into an aqueous phase and an aggregated phase of particles.

【００２６】＜実施例２＞数平均粒径９０ｎｍで比重が
１．０６のポリスチレン粒子の１０容量％水分散液に、
直鎖状で両末端に疎水基を有する水溶性ウレタンポリマ
ー（ローム＆ハース社製の「プライマルＲＭ８２５」）
を０．３重量％添加した。混合後、１０分で凝集し、水
相と粒子の凝集相の２相に分離した。次いで、水溶性ウ
レタンポリマー（「プライマルＲＭ８２５」）の濃度が
３重量％になるように水溶性ウレタンポリマーを追加
し、撹拌、混合することにより、凝集した粒子を再分散
させることができた。Example 2 A 10% by volume aqueous dispersion of polystyrene particles having a number average particle size of 90 nm and a specific gravity of 1.06 was prepared as follows:
Linear water-soluble urethane polymer having hydrophobic groups at both ends ("Primal RM825" manufactured by Rohm & Haas)
Was added in an amount of 0.3% by weight. After mixing, they aggregated in 10 minutes and separated into two phases, an aqueous phase and an aggregated phase of particles. Next, the water-soluble urethane polymer ("Primal RM825") was added with the concentration of the water-soluble urethane polymer to be 3% by weight, followed by stirring and mixing, whereby the aggregated particles could be redispersed.

【００２７】＜比較例１＞数平均粒径９０ｎｍで比重が
１．０６のポリスチレン粒子の１０容量％水分散液に、
直鎖状で両末端に疎水基を有しないポリエチレングリコ
ールを０．３重量％添加した。なお、用いたポリエチレ
ンゴリコールの重量平均分子量は、実施例１及び２で用
いた「プライマルＲＭ８２５」とほぼ同じ２万程度であ
る。混合後１ヶ月が経過しても、ポリスチレン粒子は安
定な分散状態を保ち、凝集しなかった。Comparative Example 1 A 10% by volume aqueous dispersion of polystyrene particles having a number average particle diameter of 90 nm and a specific gravity of 1.06 was prepared as follows.
0.3% by weight of a linear polyethylene glycol having no hydrophobic groups at both ends was added. The weight average molecular weight of the polyethylene glycol used was about 20,000 which is almost the same as “Primal RM825” used in Examples 1 and 2. Even one month after mixing, the polystyrene particles maintained a stable dispersed state and did not aggregate.

【００２８】＜実施例３＞数平均粒径９０ｎｍで比重が
１．０６のポリスチレン粒子の１０容量％水分散液に、
直鎖状で両末端に疎水基を有する水溶性ウレタンポリマ
ー（ローム＆ハース社製の「プライマルＲＭ８２５」）
を１．６重量％添加した。混合後、１０分程度で凝集
し、水相と粒子の凝集相の２相に分離した。凝集した粒
子相に水を添加して１００倍に希釈・撹拌し、水溶性ウ
レタンポリマー（「プライマルＲＭ８２５」）の濃度を
０．３重量％未満となるように調整したところ、凝集し
た粒子は再分散し、安定な分散状態を保った。Example 3 A 10% by volume aqueous dispersion of polystyrene particles having a number average particle diameter of 90 nm and a specific gravity of 1.06 was prepared as follows:
Linear water-soluble urethane polymer having hydrophobic groups at both ends ("Primal RM825" manufactured by Rohm & Haas)
Was added in an amount of 1.6% by weight. After mixing, they aggregated in about 10 minutes and separated into two phases, an aqueous phase and an aggregated phase of particles. Water was added to the aggregated particle phase and the mixture was diluted 100 times and stirred to adjust the concentration of the water-soluble urethane polymer (“Primal RM825”) to less than 0.3% by weight. Dispersed and maintained a stable dispersion state.

【００２９】＜比較例２＞数平均粒径９０ｎｍで比重が
１．０６のポリスチレン粒子の１０容量％水分散液に、
比較例１で用いたものと同じ、直鎖状で両末端に疎水基
を有しないポリエチレングリコールを１．６重量％添加
した。混合後１ヶ月が経過しても、ポリスチレン粒子は
安定な分散状態を保ち、凝集しなかった。<Comparative Example 2> A 10% by volume aqueous dispersion of polystyrene particles having a number average particle diameter of 90 nm and a specific gravity of 1.06 was prepared as follows.
1.6% by weight of the same polyethylene glycol as used in Comparative Example 1 and having no linear hydrophobic group at both ends was added. Even one month after mixing, the polystyrene particles maintained a stable dispersed state and did not aggregate.

【００３０】＜比較例３＞数平均粒径９０ｎｍで比重が
１．０６のポリスチレン粒子の１０容量％水分散液に、
直鎖状で両末端に疎水基を有する水溶性ウレタンポリマ
ー（ローム＆ハース社製の「プライマルＲＭ８２５」）
を１．８重量％添加した。混合後１ヶ月が経過しても、
粒子は安定な分散状態を保ち、凝集しなかった。Comparative Example 3 A 10% by volume aqueous dispersion of polystyrene particles having a number average particle diameter of 90 nm and a specific gravity of 1.06 was prepared as follows.
Linear water-soluble urethane polymer having hydrophobic groups at both ends ("Primal RM825" manufactured by Rohm & Haas)
Was added at 1.8% by weight. One month after mixing,
The particles remained in a stable dispersed state and did not agglomerate.

【００３１】＜比較例４＞数平均粒径９０ｎｍで比重が
１．０６のポリスチレン粒子の１０容量％水分散液に、
直鎖状で両末端に疎水基を有する水溶性ウレタンポリマ
ー（ローム＆ハース社製の「プライマルＲＭ８２５」）
を０．２重量％添加した。混合後１ヶ月が経過しても、
粒子は安定な分散状態を保ち、凝集しなかった。Comparative Example 4 A 10% by volume aqueous dispersion of polystyrene particles having a number average particle diameter of 90 nm and a specific gravity of 1.06 was
Linear water-soluble urethane polymer having hydrophobic groups at both ends ("Primal RM825" manufactured by Rohm & Haas)
Was added in an amount of 0.2% by weight. One month after mixing,
The particles remained in a stable dispersed state and did not agglomerate.

【００３２】[0032]

【発明の効果】本発明の疎水性粒子の凝集方法によれ
ば、粒子と水との比重差は任意であり、極めて水に近い
比重を有する粒子でも、凝集・分離が可能である。ま
た、ポリマー濃度も調整可能な範囲が広いため、疎水性
微粒子を容易に凝集させることができる。さらに、一旦
凝集した微粒子を容易に再分散させることができる。According to the method for aggregating hydrophobic particles of the present invention, the difference in specific gravity between particles and water is arbitrary, and even particles having a specific gravity very close to water can be aggregated and separated. Further, since the range in which the polymer concentration can be adjusted is wide, the hydrophobic fine particles can be easily aggregated. Furthermore, the once aggregated fine particles can be easily redispersed.

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 疎水性樹脂粒子の水分散液に、分子の両
末端に疎水基を有する水溶性ポリマーを濃度０．３〜
１．６重量％の範囲で加えることによって分散液中の樹
脂粒子を凝集させることを特徴とする疎水性樹脂粒子の
凝集方法。1. An aqueous dispersion of hydrophobic resin particles containing a water-soluble polymer having hydrophobic groups at both ends of a molecule in a concentration of 0.3 to 0.3.
A method for aggregating hydrophobic resin particles, characterized in that resin particles in a dispersion liquid are agglomerated by adding in a range of 1.6% by weight. 【請求項２】 分子の両末端に疎水基を有する水溶性線
状ポリマーとして、分子内にポリオキシアルキレン鎖を
有するポリウレタンを用いる請求項１記載の樹脂粒子の
凝集方法。2. The method according to claim 1, wherein polyurethane having a polyoxyalkylene chain in the molecule is used as the water-soluble linear polymer having hydrophobic groups at both ends of the molecule. 【請求項３】 疎水性樹脂粒子がポリ（メタ）アクリレ
ートからなる粒子又はポリスチレンラッテクス粒子であ
る請求項１又は２記載の樹脂粒子の凝集方法。3. The method according to claim 1, wherein the hydrophobic resin particles are poly (meth) acrylate particles or polystyrene latex particles. 【請求項４】 請求項１記載の凝集方法によって得られ
た凝集した疎水性樹脂粒子を含む混合物を、分子の両末
端に疎水基を有する水溶性ポリマーの濃度が請求項１記
載の濃度範囲外となるように調整することによって、凝
集した疎水性樹脂粒子を再分散させることを特徴とする
疎水性樹脂粒子の再分散方法。4. The mixture containing the agglomerated hydrophobic resin particles obtained by the agglutination method according to claim 1, wherein the concentration of the water-soluble polymer having hydrophobic groups at both ends of the molecule is out of the concentration range according to claim 1. A method for redispersing hydrophobic resin particles, wherein the aggregated hydrophobic resin particles are redispersed by adjusting so that
JP29369999A 1999-10-15 1999-10-15 Coagulating method of resin particles Pending JP2001114902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29369999A JP2001114902A (en) 1999-10-15 1999-10-15 Coagulating method of resin particles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29369999A JP2001114902A (en) 1999-10-15 1999-10-15 Coagulating method of resin particles

Publications (1)

Publication Number Publication Date
JP2001114902A true JP2001114902A (en) 2001-04-24

Family

ID=17798105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29369999A Pending JP2001114902A (en) 1999-10-15 1999-10-15 Coagulating method of resin particles

Country Status (1)

Country Link
JP (1) JP2001114902A (en)

Similar Documents

Publication Publication Date Title
Ditsch et al. Controlled clustering and enhanced stability of polymer-coated magnetic nanoparticles
Hassander et al. The mechanism of emulsion stabilization by small silica (Ludox) particles
US7795041B2 (en) Multi-polymer-coated magnetic nanoclusters
US7943236B2 (en) Narrow particle size distribution porous microspheres and method of making the same
CN107410829B (en) Method for improving emulsification stability of polysaccharide/protein compound
US7976728B2 (en) Aqueous solution of polymer having upper critical solution temperature, aqueous dispersion of particle modified with the polymer and method of storing the same
AU3885195A (en) Small particle formation
JP2505062B2 (en) Method for producing dispersion of composite particles
WO2005009603A1 (en) Colloidal core-shell assemblies and preparation methods
CA2326493A1 (en) Process for making particulate compositions
EP0777691B1 (en) Polymerisation process for the preparation of calibrated monodisperse latex in dispersion
KR20190026416A (en) Reversible deformation particle and manufacturing method for the same
CN111087513B (en) Preparation method of amphiphilic surfactant and controllable preparation method of zwitterion nano hollow capsule
CN110379577B (en) Switch type emulsion based on magnetic particles and preparation method thereof
CN113913198A (en) Preparation method and application of multiple-responsiveness Janus particle emulsifier
JPH0379605A (en) Manufacture of electrovisco- elastic fluid
JPS61215602A (en) Production of polymer particle
US20060222670A1 (en) Nanocomposite microgel particles and uses thereof
JPH08176212A (en) Method of surface-modifying magnetic particle
JP4548598B2 (en) Magnetic particle, method for producing the same, and carrier for biochemistry
JP2001114902A (en) Coagulating method of resin particles
JPH1087711A (en) Production of magnetic polymer particle
US5242964A (en) Process for the preparation of aqueous dispersions of magnetizable polymer particles with a desired size narrow distribution, and aqueous dispersions thereof, and uses thereof
JP5109298B2 (en) Magnetic polymer particles, production method thereof, and water dispersion
Widmaier et al. Quantitative description of nonhomogeneous mass distribution in controlled aggregation and fragmentation of hydrated colloids

Legal Events

Date Code Title Description
RD01 Notification of change of attorney

Effective date: 20050725

Free format text: JAPANESE INTERMEDIATE CODE: A7421