One embodiment of the present invention relates to a chloroprene copolymer latex, a method for producing a chloroprene copolymer latex, a chloroprene copolymer latex composition, and a molded article or dipped product of a chloroprene copolymer rubber. The chloroprene copolymer latex is a latex of a chloroprene copolymer including monomer units derived from 2-chloro-1,3-butadiene (chloroprene) and monomer units derived from 2-methyl-1,3-butadiene, wherein the tetrahydrofuran insoluble content in the chloroprene copolymer is 20% by mass or less, and the proportion of the monomer units derived from 2-methyl-1,3-butadiene is 10 to 27 mol % in the chloroprene copolymer.

The present invention relates to a polymer latex for dip-molding applications obtainable by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers comprising at least one conjugated diene and at least one ethylenically unsaturated nitrile compound in an aqueous medium in presence of seed latex particles having a glass transition temperature (mid point temperature Tmg) measured by DSC according to ASTM D3418-03 of ?50? C. to 50? C. wherein the seed latex particles do not contain structural units derived from ethylenically unsaturated nitrile compounds, to a method of preparing said polymer latex, to articles made by using said polymer latex and to a method for preparing dip-molded articles from said polymer latex.

A problem which is addressed is the provision of a method for manufacturing a wet rubber masterbatch and so forth permitting improvement in fatigue resistance without causing worsening in ability to achieve reduced heat generation. Wet rubber masterbatch and so forth are manufactured by means of a method comprising an operation in which a latex that comprises rubber particles for which 90 vol % particle diameter is not greater than 2 m and that has magnesium present therein in an amount which is not greater than 150 ppm is prepared.

Provided is a liquid material for forming a three-dimensional object, the liquid material adapted to be delivered to a powder material for forming a three-dimensional object to harden the powder material, the powder material containing an organic material and a base material, the liquid material including a cross-linking agent cross-linkable with the organic material and a resin having a glass transition temperature of 50 C. or higher or a melting point of 50 C. or higher.

An apparatus and a method are provided for a latex-based packaging material configured to provide a dust-free alternative to vermiculite packaging materials. The latex-based packaging material comprises a portion of a latex-based waste formulated into a recycled latex emulsion, and a portion of particulate material into which the recycled latex emulsion is mixed so as to form a latex-based pulp. In some embodiments, additional components, such as any of various plasticizers, coloring agents, or hardeners, may be included in the latex-base pulp. The latex-based pulp is dispensed and dried so as to form the latex-based packaging material in a variety of desired shapes. Drying may be accomplished by way of unaided atmospheric evaporation, or by way of various conventional drying methods. In some embodiments, the desired shape of the packaging material comprises latex-based packaging peanuts suitable for separating and cushioning forces between containers during transportation in a larger container.

A composition for rubber, including a chloroprene-based polymer latex (A), a metal oxide (B), an antioxidant (C), a surfactant (D) and a pH adjuster (E), and being free of a vulcanization accelerator, in which a tetrahydrofuran (THT) insoluble matter content in a chloroprene-based polymer in the (A) is from 50 mass % to 85 mass %, and in which contents of the (B), the (C), the (D), and the (E) with respect to 100 parts by mass of a solid content of the (A) are from 1 part by mass to 10 parts by mass, from 0.1 part by mass to 5 parts by mass, from 0.1 part by mass to 10 parts by mass, and from 0.01 part by mass to 5 parts by mass, respectively.

One method for creating barrier products (for example, condoms and gloves) includes: (a) dipping a former into a tank of elastic compound. The former has an indentation extending inwardly from an outer surface for creating a first protrusion on a first face of the barrier product. The method further includes: (b) removing the former from the tank of elastic compound, whereby some of the elastic compound removably adheres to the former and fills the indentation; (c) applying supplemental material to the elastic compound, whereby creating a second protrusion on a second face of the barrier product; and (d) fully drying the supplemental material. One barrier product includes an elastic wall having opposed faces, and first and second protrusions respectively extend from the opposed faces. The first and second protrusions are in cross-sectional alignment whereby rotational input forces on the first protrusion create rotational output forces on the second protrusion.

Disclosed is an emulsion formed using, as an emulsifier, 0.01 to 30 parts by weight of a perfluoroalkylethyl phosphonic acid salt represented by the general formula: C.sub.nF.sub.2n+1CH.sub.2CH.sub.2P(O)(OM.sup.1)(OM.sup.2) [III] (M.sup.1: a hydrogen atom, ammonium salt, or organic amine salt, M.sup.2: an ammonium salt or organic amine salt, n: 1 to 6), based on 100 parts by weight of a perfluoropolyether oil represented by the general formula: RfO(C.sub.3F.sub.6O).sub.p(C.sub.2F.sub.4O), (CF.sub.2O), Rf [I] (Rf and Rf: C.sub.1-C.sub.5 perfluoroalkyl groups, p+q+r: 2 to 200) or the general formula: F(CF.sub.2CF.sub.2CF.sub.2O).sub.nCF.sub.2CF.sub.3 [II](n: 2 to 100), or a perfluorocarbon compound. In spite of using, as an emulsifier, a compound having a perfluoroalkyl group containing 6 or less carbon atoms, which is said to have low bioaccumulation potential, the emulsion exhibits excellent emulsification stability, and therefore can be effectively used as a surface-treating agent, such as a mold-releasing agent.

The present invention relates to granular composite density enhancement, and related methods and compositions. The applications where these properties are valuable include but are not limited to: 1) additive manufacturing (3D printing) involving metallic, ceramic, cermet, polymer, plastic, or other dry or solvent-suspended powders or gels, 2) concrete materials, 3) solid propellant materials, 4) cermet materials, 5) granular armors, 6) glass-metal and glass-plastic mixtures, and 7) ceramics comprising (or manufactured using) granular composites.

A system may include a container configured to receive at least one substance. A system may include a heating assembly configured to heat the at least one substance, the heating assembly comprising. A system may include a plurality of electrodes, a power source connected to the plurality of electrodes, wherein an electrical field between the plurality of electrodes is created by providing power to the plurality of electrodes; and one or more heat-dispersing bodies are dispersed in the at least one substance, the one or more heat-dispersing bodies comprising: a polymer material; and a carbonous material dispersed in the polymer material, the carbonous material configured to generate heat within the container responsive to the electrical field between the plurality of electrodes.