The present invention relates to a method for preparing a graft copolymer, which includes polymerizing a first conjugated diene-based polymer, a second conjugated diene-based polymer, an aromatic vinyl-based monomer and a vinyl cyan-based monomer, wherein particle size distribution of the first conjugated diene-based polymer is 0.346 to 0.404, and particle size distribution of the second conjugated diene-based polymer is 0.196 to 0.304, a graft copolymer and a thermoplastic resin molded article.

To provide a novel technique with which the generation of aggregates over time in a dispersion liquid can be suppressed and a target substance can be detected with high sensitivity even if latex particles that have been stored are used. A method for storing in a container a latex particle dispersion liquid in which latex particles for an extracorporeal diagnostic agent are dispersed, the latex particles having a volume average particle size of 10 to 1000 nm and including a polymer containing 70 to 100% by mass of monomer units each derived from a monomer having an aryl group relative to the total monomer units, which is characterized in that the particle dispersion liquid is stored in the container by setting a ratio of a volume of a void space obtained by excluding a volume occupied by the particle dispersion liquid from an internal volume of the container to 0 to 25% (v/v) relative to the internal volume of the container.

To provide a novel technique with which the generation of aggregates over time in a dispersion liquid can be suppressed and a target substance can be detected with high sensitivity even if latex particles that have been stored are used. A method for storing in a container a latex particle dispersion liquid in which latex particles for an extracorporeal diagnostic agent are dispersed, the latex particles having a volume average particle size of 10 to 1000 nm and including a polymer containing 70 to 100% by mass of monomer units each derived from a monomer having an aryl group relative to the total monomer units, which is characterized in that the particle dispersion liquid is stored in the container by setting a ratio of a volume of a void space obtained by excluding a volume occupied by the particle dispersion liquid from an internal volume of the container to 0 to 25% (v/v) relative to the internal volume of the container.

A process for the production of an elastomer agglomerate composition wherein the process comprises the steps in this order: (a) providing a slurry comprising elastomeric particles having an average particle size of 150 nm in water; and (b) forcing the slurry from (a) through an aperture at a flow velocity of at least 500 m/s. The elastomer agglomerate compositions produced via such process demonstrate a particularly desirable high average particle size.

The present invention relates to a diene-based rubber latex including a polymer aggregate and having an extra large diameter, a method for preparing same and a graft copolymer with a core-shell structure, including same and having excellent impact strength and surface properties. A diene-based rubber latex of which 14 wt % to 26 wt % has diameter of 100 nm to less than 300 nm, 62 wt % to 81 wt % has a diameter of 300 nm to less than 800 nm, and 5 wt % to 14 wt % has a diameter of 800 nm to less than 1000 nm, based on 100 wt % of total rubber particles.

The present invention relates to a diene-based rubber latex including a polymer aggregate and having an extra large diameter, a method for preparing same and a graft copolymer with a core-shell structure, including same and having excellent impact strength and surface properties. A diene-based rubber latex of which 14 wt % to 26 wt % has diameter of 100 nm to less than 300 nm, 62 wt % to 81 wt % has a diameter of 300 nm to less than 800 nm, and 5 wt % to 14 wt % has a diameter of 800 nm to less than 1000 nm, based on 100 wt % of total rubber particles.

To provide a novel technique with which the generation of aggregates over time in a dispersion liquid can be suppressed and a target substance can be detected with high sensitivity even if latex particles that have been stored are used. A method for storing in a container a latex particle dispersion liquid in which latex particles for an extracorporeal diagnostic agent are dispersed, the latex particles having a volume average particle size of 10 to 1000 nm and including a polymer containing 70 to 100% by mass of monomer units each derived from a monomer having an aryl group relative to the total monomer units, which is characterized in that the particle dispersion liquid is stored in the container by setting a ratio of a volume of a void space obtained by excluding a volume occupied by the particle dispersion liquid from an internal volume of the container to 0 to 25% (v/v) relative to the internal volume of the container.

To provide a novel technique with which the generation of aggregates over time in a dispersion liquid can be suppressed and a target substance can be detected with high sensitivity even if latex particles that have been stored are used. A method for storing in a container a latex particle dispersion liquid in which latex particles for an extracorporeal diagnostic agent are dispersed, the latex particles having a volume average particle size of 10 to 1000 nm and including a polymer containing 70 to 100% by mass of monomer units each derived from a monomer having an aryl group relative to the total monomer units, which is characterized in that the particle dispersion liquid is stored in the container by setting a ratio of a volume of a void space obtained by excluding a volume occupied by the particle dispersion liquid from an internal volume of the container to 0 to 25% (v/v) relative to the internal volume of the container.

Disclosed herein are process for increasing the molecular weight of guayule natural rubber that is solubilized in an organic solvent solution. The processes utilize shear desolventizing to achieve the increase in molecular weight.

Disclosed herein are process for increasing the molecular weight of guayule natural rubber that is solubilized in an organic solvent solution. The processes utilize shear desolventizing to achieve the increase in molecular weight.