Abstract: An additive for resin kneading contains an organic ultraviolet absorber and/or a radical scavenger, and a polymer having the organic ultraviolet absorber and/or the radical scavenger dispersed. The additive for resin kneading has a median size of 1 µm or more and 100 µm or less. A percentage of the total amount of the organic ultraviolet absorber and the radical scavenger in the additive for resin kneading is 20% or more and 70 % or less. The polymer is a copolymer of a vinyl monomer component that contains a monofunctional vinyl monomer containing only one polymerizable carbon-carbon double bond per molecule, and a polyfunctional vinyl monomer containing two or more polymerizable carbon-carbon double bonds per molecule. A percentage of the monofunctional vinyl monomer in the total amount of the monofunctional vinyl monomer and the polyfunctional vinyl monomer is 10% or more and 95% or less.

Abstract: A carbon dioxide sorbent characterized in that carbon dioxide sorbing material incorporated in pores of the porous inorganic particles is sealed in the pores with a resin.

Abstract: A controlled release particle includes a core formed by suspension polymerization of a core ingredient component containing an antibiotic compound and a first polymerizable vinyl monomer, and containing a first polymer of the first polymerizable vinyl monomer and the antibiotic compound present in the first polymer; and a shell formed by suspension polymerization of a second polymerizable vinyl monomer having affinity with water of the same or higher than that of the first polymerizable vinyl monomer, containing a second polymer obtained from the second polymerizable vinyl monomer, and covering the core.

Abstract: A production method of controlled release particles 1 includes an oil phase component preparation step in which an oil phase component containing a hydrophobic slurry is prepared by dispersing, in a hydrophobic polymerizable vinyl monomer, an antibiotic compound that is hydrophobic and is substantially insoluble to the hydrophobic polymerizable vinyl monomer without the presence of a solvent; a water dispersion step in which a hydrophobic slurry is dispersed in water to prepare an aqueous dispersion; and a polymerization step in which the polymerizable vinyl monomer is subjected to suspension polymerization to produce a polymer.

Abstract: A controlled release particle includes a core containing an antibiotic compound, and a shell covering the core. The controlled release particle is obtained by a production method including a first step in which a first component containing an antibiotic compound and a polymerizable vinyl monomer is subjected to suspension polymerization to form the core containing the antibiotic compound and a polymer of the polymerizable vinyl monomer; and a second step in which a second component containing a shell-forming component is subjected to interfacial polymerization to form a shell, wherein in the second step, the interfacial polymerization is started simultaneously with the start of the suspension polymerization of the first step, or started after the start of the suspension polymerization of the first step.

Abstract: In antibiotic particles, an antibiotic compound is dispersed in a polymer containing an epoxy group.

Abstract: Controlled release particles are obtained by dissolving a hydrophobic antibiotic compound with a hydrophobic polymerizable vinyl monomer to prepare a hydrophobic solution, blending water with an emulsifier to prepare an aqueous emulsifier solution, emulsifying the hydrophobic solution in the aqueous emulsifier solution, and polymerizing the polymerizable vinyl monomer by mini-emulsion polymerization in the presence of a polymerization initiator, thereby producing a polymer containing an antibiotic compound and having an average particle size of below 1 ?m.

Abstract: Controlled release particles are obtained by dissolving a hydrophobic antibiotic compound in a hydrophobic polymerizable vinyl monomer without the presence of a solvent, thereby preparing a hydrophobic solution, the hydrophobic antibiotic compound having a melting point of 100° C. or less, a polar term ?p,compound of 2 to 8 [(J/cm3)1/2] of a solubility parameter (?) and a hydrogen bonding term ?h,compound of 5.5 to 9.5 [(J/cm3)1/2] of the solubility parameter (?), the solubility parameter (?) defined by Hansen and calculated by van Klevelen and Hoftyzer method; dispersing the hydrophobic solution in water; and polymerizing the polymerizable vinyl monomer in the presence of an oil-soluble initiator by radical polymerization, thereby producing a polymer having a polar term ?p,polymer of 5 to 7 [(J/cm3)1/2] and a hydrogen bonding term ?h,polymer of 8 to 10 [(J/cm3)1/2] of the solubility parameter (?).

Abstract: A controlled release particle includes a core formed by suspension polymerization of a core ingredient component containing an antibiotic compound and a first polymerizable vinyl monomer, and containing a first polymer of the first polymerizable vinyl monomer and the antibiotic compound present in the first polymer; and a shell formed by suspension polymerization of a second polymerizable vinyl monomer having affinity with water of the same or higher than that of the first polymerizable vinyl monomer, containing a second polymer obtained from the second polymerizable vinyl monomer, and covering the core.

Abstract: A controlled release particle includes a core containing an antibiotic compound, and a shell covering the core. The controlled release particle is obtained by a production method including a first step in which a first component containing an antibiotic compound and a polymerizable vinyl monomer is subjected to suspension polymerization to form the core containing the antibiotic compound and a polymer of the polymerizable vinyl monomer; and a second step in which a second component containing a shell-forming component is subjected to interfacial polymerization to form a shell, wherein in the second step, the interfacial polymerization is started simultaneously with the start of the suspension polymerization of the first step, or started after the start of the suspension polymerization of the first step.

Abstract: Controlled release particles are obtained by dissolving a hydrophobic antibiotic compound in a hydrophobic polymerizable vinyl monomer without the presence of a solvent, thereby preparing a hydrophobic solution, the hydrophobic antibiotic compound having a melting point of 100° C. or less, a polar term ?p,compound of 2 to 8 [(J/cm3)1/2] of a solubility parameter (?) and a hydrogen bonding term ?h,compound of 5.5 to 9.5[(J/cm3)1/2] of the solubility parameter (?), the solubility parameter (?) defined by Hansen and calculated by van Klevelen and Hoftyzer method; dispersing the hydrophobic solution in water; and polymerizing the polymerizable vinyl monomer in the presence of an oil-soluble initiator by radical polymerization, thereby producing a polymer having a polar term ?p,polymer of 5 to 7[(J/cm3)1/2] and a hydrogen bonding term ?h,polymer of 8 to 10 [(J/cm3)1/2] of the solubility parameter (?).

Abstract: A freeze-thawing tank assembly includes an upright vessel having a hollow defined therein for accommodating therein a quantity of fluid medium to be treated. The vessel is closed at an upper end by a lid and at a lower end by a normally closed discharge valve. A plurality of double-walled structures are accommodated within the hollow of the vessel in equally spaced and parallel relation with each other. Each of the double-walled structures has a fluid passage defined therein for the flow of a heat-exchanging fluid medium and also has a fluid inlet and outlet communicated with the fluid passage. The fluid medium to be treated may be alternately frozen and thawed by passing the heat-exchanging medium through the fluid passages in the double-walled structures.

Abstract: There is disclosed a core-shell polymer which comprises:(a) a core layer polymerized from a core forming monomer mainly comprising an aromatic monovinyl monomer; and(b) a shell layer polymerized from a shell forming monomer which comprises:(b1) 25-95% by weight of an aromatic monovinyl monomer as a first monomer;(b2) 5-40% by weight of at least one monomer selected from the group consisting of an .alpha., .beta.-ethylenically unsaturated carboxylic acid and a hydroxyalkyl ester of .alpha., .beta.-ethylenically unsaturated carboxylic acid as a second monomer; and(b3) 0-70% by weight of a third monomer which is other than the first and second monomers and is copolymerizable therewith,wherein the shell layer is contained in an amount of 5-70% by weight based on the core-shell polymer, and the core-shell polymer having a weight average particle size of 0.1-50 micrometers.There is further disclosed a plastisol which comprises the core-shell polymer dispersed in a liquid plasticizer.

Abstract: An unsaturated polyester resin composition for the production of cured molded article which comprises:an unsaturated polyester resin; anda core-shell polymer as a low shrinking agent which comprises:(a) a cross-linked core layer polymerized from a first monomer comprising an aromatic vinyl monomer in an amount of not less 50% by weight, the core layer being contained in the core-shell polymer in an amount of 50-90% by weight; and(b) a shell layer polymerized from a monomer comprising methyl methacrylate in an amount of not less 50% by weight;and the core-shell polymer having a refractive index in the range of 1.52-1.58 and within .+-.0.02 from the refractive index of the cured material of the unsaturated polyester resin.

Abstract: The invention thus provides a core-shell polymer comprising a core phase which is rubbery polymer and a shell phase which is a glassy polymer with an unsaturated dicarboxylic acid or its mono-alkyl ester as a constituent thereof, wherein the toluene-soluble fraction of the core-shell polymer accounts for not more than 10% by weight.It also provides polyamide resin compositions comprising said core-shell polymer and molded articles produced by molding said compositions.The resin compositions and molded articles which comprises the core-shell polymer as an impact modifier have good features, especially a high impact strength at temperature ranging from room temperature to -30.degree. C.

Abstract: A multi-layered polymer having (a) a core layer of an aromatic vinyl polymer, (b) an intermediate layer of a butadienic rubbery polymer and (c) an outer layer of an aromatic vinyl glassy polymer, the amount of the components (a), (b) and (c) being 12 to 42 weight %, 48 to 78 weight % and 10 to 40 weight %, respectively, provides a thermoplastic resin composition excellent not only in impact strength, especially in impact strength at low temperatures, but also in, in the case of containing a coloring agent, color-stability including less mottlings, and giving a molded article improved in preventing occurrence of delamination around the gate region.

Abstract: This invention relates to a core-shell polymer which is useful for polyoxymethylene resin, a polyoxymethylene resin composition containing the core-shell polymer and a molded article made of the polyoxymethylene resin composition.The core-shell polymer comprises a rubbery polymer core and a glassy polymer shell and has substanially no detectable anion.This core-shell polymer makes the molded articles be improved on the impact strength, elongation at the weld line, etc. The molded articles is used as various products (such as gears, reels, etc.).

Abstract: The invention provides a core-shell polymer which comprises (a) a core phase having carboxyl groups on surface part of the core and (b) a shell phase which is a glassy polymer containing neither functional groups reactive to the the carboxyl group nor functional groups reactive to the amino group, wherein the toluene-soluble fraction is not higher than 10% by weight based on the whole core-shell polymer; polyamide resin compositions comprising said core-shell polymer; and molded articles produced by molding said compositions.Impact strength of the resin composition or its molded articles was improved by using the core-shell polymer.

Abstract: The present invention relates to a core-shell polymer which is useful for polyoxymethylene resin, a polyoxymethylene resin composition containing the core-shell polymer and a molded article made of the polyoxymethylene resin.The core-shell polymer is produced by an emulsion polymerization reaction using an oligomeric surfactant and a neutral radicals-liberating polymerization initiator.This core-shell polymer makes the molded article be improved on the impact strength, elongation at the weld line, weatherability, thermal stability, etc., and the molded articles is used as various products.

Abstract: This invention relates to a core-shell polymer comprising (a) a core having epoxy groups on the surface and (b) a shell on the core (a) having neither epoxy group nor functional groups that are reactive with epoxy group, compositions of engineering plastics which are excellent in impact strength at low temperature and the molded articles of the resin composition.