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公开(公告)号：JP2002179708A
公开(公告)日：2002-06-26
申请号：JP2000381843
申请日：2000-12-15
Applicant: NEW IND RES ORGANIZATION
Inventor： OKUBO MASAYOSHI , MINAMI HIDETO
IPC: C08F2/08 , C08F2/44 , C08F265/06
Abstract: PROBLEM TO BE SOLVED: To provide a method for easily producing a golf ball-like polymer microparticle having many deep depressions or hollows on the surface. SOLUTION: This method for producing polymer microparticles comprises the steps of polymerizing a monomer (B) by seed dispersing polymerization method in a medium (M) in which microparticles of a seed polymer (PA) are dispersed, in the presence of (i) the monomer (B) soluble in the medium (M) giving a polymer (PB) which is different from the polymer (PA) and has a lower or equal compatibility to the medium (M) compared to the seed polymer (PA), (ii) an organic solvent (S) which is a poor solvent or non-solvent of the seed polymer (PA) but a good solvent of the polymer (PB) and non-soluble or partially soluble in the medium (M), (iii) a polymerization initiator and (iv) a dispersing agent, separating the obtained composite polymer microparticles and treating to remove the solvent (S).
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公开(公告)号：JP2002080503A
公开(公告)日：2002-03-19
申请号：JP2000267708
申请日：2000-09-04
Applicant: NEW IND RES ORGANIZATION
Inventor： OKUBO MASAYOSHI , MINAMI HIDETO
IPC: C08F2/18
Abstract: PROBLEM TO BE SOLVED: To obtain a hollow polymer fine particle comprising a shell of single layer structure, having a high porosity by a short process and by a simple method. SOLUTION: A mixture of (i) a crosslinkable monomer (B) (or a mixture of the crosslinkable monomer (B) and a monofunctional monomer (B')), (ii) an initiator (C) and (iii) a slightly water-soluble solvent (D) having low solubility of a polymer obtained from the crosslinkable monomer (B) is dispersed in an aqueous solution of a dispersion stabilizer (A), and a suspension polymerization is carried out to give the hollow polymer fine particle comprising the shell of the single layer structure composed of the polymer of the crosslinkable monomer or a copolymer of the crosslinkable monomer and the monofunctional monomer.
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公开(公告)号：JP2003096108A
公开(公告)日：2003-04-03
申请号：JP2002056571
申请日：2002-03-01
Applicant: NEW IND RES ORGANIZATION
Inventor： OKUBO MASAYOSHI , MINAMI HIDETO
IPC: B01J13/16 , B01J13/14 , C08F2/20 , C08F2/44 , C08F291/00
Abstract: PROBLEM TO BE SOLVED: To provide a method for selectively and easily manufacturing fine particles that can release an objective component in a sustained manner for a long time, or that can release an objective component at a specific point of time. SOLUTION: A mixture of an objective component, a monomer component selected from the group consisting of a cross-linkable monomer, a monofunctional monomer and a mixture thereof, an auxiliary polymer that has a low compatibility to a polymer or copolymer from the monomer component, and has a surface tension with water that is larger than that of the polymer, and an initiator is dispersed in an aqueous solution of a dispersion stabilizer, and subjected to emulsion polymerization to form fine particles containing the objective component.
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公开(公告)号：JP2003093868A
公开(公告)日：2003-04-02
申请号：JP2002056643
申请日：2002-03-01
Applicant: NEW IND RES ORGANIZATION
Inventor： OKUBO MASAYOSHI , MINAMI HIDETO
Abstract: PROBLEM TO BE SOLVED: To provide a fragrant fine particle which releases fragrant components for a long period of time and a fragrant fine particle which can release fragrance at arbitrary times. SOLUTION: The fragrant fine particle contains the fragrant components in a hollow part of the hollow fine particle comprising a shell and the hollow part. The shell comprises a polymer or a copolymer prepared by polymerizing or copolymerizing a monomer component containing 100-0 wt.% of at least one crosslinkable monomer and 0-100 wt.% of at least one monofunctional monomer.
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