Abstract:
Provided is a manufacturing method for porous resin microparticles comprising a step of heating a polyester thermoplastic resin having biodegradability to a temperature of at least 80°C and at most 200°C in a glycol ether solvent to obtain a solution, and cooling the solution to thereby precipitate the polyester thermoplastic resin as porous resin microparticles.
Abstract:
Provided are hollow particles that each have a shell made up of at least one layer, wherein the hollow particles each have an average particle diameter of 10-20 nm and said at least one layer contains a vinyl resin.
Abstract:
Provided are: irregularly shaped resin particles which have improved characteristics such as light diffusion characteristics and reflection characteristics; and a method for producing the irregularly shaped resin particles. The irregularly shaped resin particles are non-spherical irregularly shaped resin particles, each of which has a circular contour when viewed from the direction in which the particle has the maximum projected area, while having a non-circular contour when viewed from the direction in which the particle has the minimum projected area. Each irregularly shaped resin particle contains a first resin component (1) and a second resin component (2) that are different from each other, and the second resin component (2) is unevenly distributed near the surface of each irregularly shaped resin particle. A method for producing irregularly shaped resin particles is a method in which a polymerizable vinyl monomer in an aqueous emulsion is absorbed by particles that are formed from a resin and polymerized, or a method in which a solution that is obtained by dissolving a resin in a polymerizable vinyl monomer is polymerized in an aqueous medium. The resin has a weight average molecular weight within the range of 150,000-1,000,000 and has a portion that is derived from a (meth)acrylic acid ester which contains a halogenated alkyl group having 2-10 carbon atoms or an alicyclic hydrocarbon group. The polymerizable vinyl monomer contains 5-50% by weight of a crosslinkable monomer.
Abstract:
A method for manufacturing a foamed resin container with a label comprising the steps of supplying a sheet having a label shape printed at a predetermined position thereof, and positioning the label shape for blanking it out, wherein a series of processes from the step of positioning to the step of forming is followed so as to easily and continuously manufacture foamed resin containers with a label and an apparatus for use with the same method. With the method, it is possible to locate the position of a label with greater accuracy. Therefore, even when a pliable thin sheet of resin in which no base material such as paper is used is used, it is possible to make a blanked label integral with a foamed resin container at a predetermined position without forming it into a tubular shape.
Abstract:
Particles of polyolefin are impregnated with styrene which is polymd. to prep. particles contg. the polyolefin, polystyrene, and olefin-styrene graft copolymer. The particles are impregnated with a blowing agent and foamed in a mold and the foam is coated wich a styrene-unsatd.-polyestergass fiber mixt. Which is hardened to prep. composites with good adhesion between the foam and the surface coating. The coated foams have good mech. strength, esp. tensile strength, and are useful as building materials, heat insulation, etc.
Abstract:
Styrene resin foamable particles that include a conductive carbon black having a volume resistivity of 1.0×104 Ω∙cm or less, a styrene resin, and a blowing agent.
Abstract:
The present application provides a composite particle having a good feeling upon application and capable of effectively preventing make-up smudges by selectively adsorbing sebum, particularly, free fatty acid, and moreover, having a toning effect on the skin texture, and a cosmetic composition containing the composite particle. The composite particle of the present invention comprises a resin particle coated on its surface with amorphous calcium phosphate and calcium carbonate, which resin particle contains a polymer of a vinyl monomer and any one of a phosphorous acid diester component having a certain configuration and a partially esterified phosphoric acid component having a certain configuration.
Abstract:
Provided are: a method for producing particles by suspension polymerization, the method having exceptional monomer dispersion stability and also making it possible to simplify a cleaning step; composite particles that can be obtained by this production method; and the use of these composite particles. This method for producing composite particles includes a step for conducting the aqueous suspension polymerization of a monomer mixture containing a polymerizable vinyl monomer in the presence of small polymer particles having a volume-average particle size of 20-500 nm with water-soluble celluloses adsorbed to the surface, and obtaining composite particles that contain these small polymer particles and large polymer particles larger than these small polymer particles.
Abstract:
An expanded molded article having a void percentage of 5 to 50 %, the molded article comprising 50 to 800 parts by weight of styrene-based resin relative to 100 parts by weight of non-crosslinked linear low-density polyethylene-based resin which can be obtained by using a metallocene catalyst, wherein the molded article is obtained by impregnating styrene-modified linear low-density polyethylene-based resin beads with a volatile blowing agent to provide expandable beads, pre-expanding the expandable beads and then subjecting the obtained pre-expanded beads to expansion molding, the styrene-modified linear low-density polyethylene-based resinbeads each have the styrene-based resin dispersed in the form of particles, and a diameter of particle is 0.8 μm or smaller in a surface region within at least 5 μm from the bead surface and in a center region within a 5 μm radius from the bead center.
Abstract:
Thermoplastic resin foam having good surfaces and high expansion ratio, were prepd. by extruding through molds. Thus, a mixt. of polystyrene 100 parts, powdered talc 2 parts, and brown pigment 0.1 part was extruded at 200-220≦̸C through a mold to give a foam having average density 0.33g/cc, bending strength 190kg/cm2 longitudinally and 60kg/cm2 laterally.