The invention relates to a method for the manufacture of a prophylactic article, especially of a glove, from a (carboxylated) diene rubber, according to which a layer of a (carboxylated) diene latex is applied on a former and the (carboxylated) diene latex is cross-linked with a cross-linking agent, which is immobilized on inorganic and/or organic particles with formation of modified particles, and the modified particles are added to the (carboxylated) diene latex.

The present invention relates to a method (100) for preparing a pre-treated synthetic latex emulsion, the method comprising the steps of, adding a synthetic latex into a tank (101), characterized by mixing a surfactant with the synthetic latex in the tank (102), adding alkaline material into a mixture of the synthetic latex added with the surfactant (103), adding a reactive metal ion into the mixture (104) and continue mixing the mixture for at least two hours (105), wherein the reactive metal ion is obtained by heating a metal oxide or metal hydroxide with supply of alkaline material at 120 to 180° C.

An object of the prevent invention is to provide a rubber latex compound that enables manufacturing a glove which is superior in terms of touch panel responsiveness, and has superior flexibility. The rubber latex compound according to one aspect of the present invention is a rubber latex compound for a glove containing a rubber latex as a principal component, wherein carbon black, an anionic surfactant, a nonionic dispersant, and a water-soluble polymer are contained in the rubber latex compound; a DBP oil absorption of the carbon black is no less than 250 ml/100 g and no greater than 600 ml/100 g, and a volatile content of the carbon black is no less than 0.3% by mass and less than 1.0% by mass; an amount of addition of the water-soluble polymer with respect to 100 parts by mass of the carbon black is no less than 8 parts by mass and no greater than 50 parts by mass; and a total amount of addition of the nonionic dispersant and the water-soluble polymer with respect to 100 parts by mass of the carbon black is no less than 38 parts by mass and no greater than 200 parts by mass.

The present invention generally relates to an eco-friendly wearable article comprising a nutrient complex capable of efficiently able to reduce or eliminate methane gas emission during biodegradation of the article, and a method of making the eco-friendly wearable article containing the nutrient complex. Preferably, the nutrient complex typically comprises anionic sulphate ions and cationic salts of iron(II) and copper(II), thereby facilitating methane oxidation in an anaerobic environment such as a landfill.

An exemplary embodiment provides a method for preparing a latex composition for dip forming, the method including: (a) preparing a monomer mixture including a conjugated diene-based monomer, an ethylenically unsaturated nitrile monomer and an ethylenically unsaturated acid monomer; (b) introducing an additive including an inorganic solvent, an emulsifier and starch into the monomer mixture; and (c) preparing a copolymer latex by polymerizing the monomer mixture, wherein a content of the starch is 0.1 to 4.9 parts by weight with respect to 100 parts by weight of the monomer mixture.

Provided is a dip-molded article, and more particularly, provided are a dip-molded article including: a layer derived from a latex composition for dip-molding; and a layer derived from a polymer including a repeating unit derived from a diacetylene-based compound, a latex composition for dip-molding, and a preparation method thereof.

A latex composition includes a sulfur-based vulcanizing agent and a xanthogen compound mixed with a conjugated diene polymer latex, the aqueous dispersion of a sulfur-based vulcanizing agent being a dispersion in which the sulfur-based vulcanizing agent is dispersed in water using an anionic surfactant.

Disclosed is a dip-formed article comprising a layer derived from a latex composition for dip-forming, wherein the latex composition for dip-forming contains a carboxylic acid-modified nitrile-based copolymer latex, the carboxylic acid-modified nitrile-based copolymer latex contains a carboxylic acid-modified nitrile-based copolymer, and the dip-formed article has an elongation of more than 650% and satisfies the following Expressions 1 and 2,

[Expression 1]

k.sub.1′+k.sub.2′+k.sub.3′≤9.3 N/mm  (1)

[Expression 2]

0.55≤k.sub.1′/(k.sub.1′+k.sub.2′+k.sub.3′)  (2)

wherein k.sub.1′ is a value obtained by dividing an equilibrium coefficient k.sub.1 by a thickness of a test piece, and k.sub.2′ and k.sub.3′ are values obtained by dividing viscous coefficients k.sub.2 and k.sub.3 by the thickness of the test piece, respectively.

Disclosed herein are polysaccharide-elastomer masterbatch compositions and processes for preparing the masterbatch compositions. One method comprises a step of a) mixing i) an aqueous polysaccharide dispersion, or ii) a basic aqueous polysaccharide solution, with a rubber latex solution containing a rubber component to form a mixture. The method further comprises the steps of: b) coagulating the mixture obtained in step a) to produce a coagulated mass; and c) drying the coagulated mass obtained in step b). The masterbatch compositions are useful in preparing rubber-containing articles.

The invention provides a variety of novel devices, systems, and methods of utilizing mixed-ionic-electronic conductor (MIEC) materials adapted to function with an applied current or potential. The materials, as part of a circuit, are placed in contact with a part of a human or nonhuman animal body. A sodium selective membrane system utilizing the MIEC is also described.