Provided is a method for producing a mixture, comprising a mixing step for mixing a slurry prepared by dispersing a filler containing carbon black and a rubber liquid prepared by dispersing or the like a rubber component. In the above producing method, the carbon black contained in the slurry has a surface average acidic functional group amount (eq/m.sup.2) of 0.40 or more and less than 3.00; a pH of the slurry is 8 or more; the sum total of the solid matter concentrations of the slurry and the rubber liquid is 20% by mass or less; a mixing equipment used has one or more rotors disposed rotatably in a rotation axis direction and one or more stators disposed unrotatably in the rotation axis direction; the rotors and the stators have plural projections which are arranged circularly with the rotation axis set as the center; rings are formed concentrically by the projections in a single stage or a multistage; and the slurry and the rubber liquid are allowed to pass through a space between the rotors and the stators while the rotors rotate, whereby the mixing is carried out to produce the mixture.

An aqueous elastomer dispersion includes a dispersed phase and an aqueous phase. The dispersed phase includes an elastomer including curable aliphatic conjugated-diene elastomers, such as polyisoprene, and a minor amount of at least one additive. The aqueous phase includes water and other optional components in either a soluble state or a dispersion state. The aqueous elastomer dispersion may be prepared by dissolving an elastomer, such as rubber, and additives in a solvent mixture and then converting the resulting solution into an aqueous emulsion. The aqueous emulsion is concentrated and the solvent is stripped from it to yield a dilute latex. The dilute latex that is obtained is concentrated again. Articles made from the aqueous elastomer dispersion include medical gloves, condoms, probe covers, dental dams, finger cots, catheters and the like.

The invention relates to a method for manufacturing a pellet, comprising a) providing residual rubber powder from a rubber disintegration process; b) providing a pelletizing system, including a pelletizer and a cooling device; c) feeding the residual rubber powder as at least part of a feed material, into a pelletizer; d) providing the rubber powder in an amount between 50% and 100%; e) applying a pressure to the residual rubber for a predetermined process duration; f) releasing the pelletized rubber and cooling the pelletized rubber at a cooling rate dependent on the operational temperature of the pelletizer.

The present invention relates to an aqueous dispersion of polyalkene supramolecular polymer with a surfactant system chosen from an anionic surfactant, a cationic surfactant and a non-ionic surfactant. The invention also relates to a cosmetic composition comprising such a dispersion. Use for caring for and making up keratin materials.

A compounding material for rubber kneading including: a sealing pouch (A) having an outer layer with a thickness of 30 to 100 ?m that is made of a polymer (a) with a melting point of 60 to 140? C., and a liquid diene-based rubber (B) sealed inside the sealing pouch (A). Also a sealed package including: a sealing container with low water vapor permeability, and the compounding material for rubber kneading sealed inside the sealing container.

Disclosed herein is a polymeric article comprises an elastomeric layer comprising cured synthetic polyisoprene particles that comprise a rare earth catalysed polyisoprene. The polyisoprene particles may comprise sulfur crosslinks and/or may be pre- vulcanized. Also disclosed herein are methods for producing polymeric articles comprising an elastomeric layer comprising cured synthetic polyisoprene particles that comprise a rare earth catalysed polyisoprene.

Disclosed herein are rubber compositions comprising: (a) natural rubber, polyisoprene, or a combination thereof; (b) at least one conjugated diene monomer containing polymer or polymer; (c) a first silica filler having a BET surface area of at least 220 m.sup.2/g; (d) a second silica filler having a BET surface area lower than that of the first silica filler and greater than 135 m.sup.2/g; and (e) optionally carbon black filler.

A heat-conducting sheet according to the present invention is a heat-conducting sheet having an initial Asker C hardness of 50 or less, the heat-conducting sheet containing an elastomer resin at the volume proportion of 30 to 70%, and a thermally conductive filler at the volume proportion of 30 to 70%, in which the elastomer resin has a viscosity at 25 C. of 3000 Pa.Math.s or less, and the elastomer resin has a lamella length of 20 mm or more. According to the present invention, a heat-conducting sheet which has initial flexibility sufficient to exhibit excellent shape conformability and in which residual stress is reduced after compression by applying pressure can be provided.

According to a production method of a rubber composition for tire of the present invention comprising a rubber component (A) comprising at least one selected from the group consisting of a natural rubber and a synthetic diene rubber, a filler, a coupling agent (D) of (C.sub.pH.sub.2p+1O).sub.3Si(CH.sub.2).sub.qSCOC.sub.kH.sub.2k+1, and a vulcanizing agent (E) comprising a vulcanizer and a vulcanization accelerator, the method comprising: a step X1 of kneading all amount of A, a part of the filler and a part of D, a step X2 of kneading the kneaded product of step X1, the remaining amount of the filler and D, and a step F of kneading the kneaded product of step X2 and E, it is possible to produce a rubber composition for tire in which fuel efficiency and abrasion resistance are improved in a good balance.

An elastomeric composition is based on at least a diene elastomer, an inorganic filler as reinforcing filler and a monohydroxysilane polysulfide as coupling agent of formula (I): (HO)(R.sup.1).sub.2SiCH.sub.2(R.sup.2)CHZS.sub.xZHC(R.sub.2)CH.sub.2Si(R.sup.1).sub.2(OH) (I), in which: each R.sup.1 represents a monovalent hydrocarbon group having from 1 to 18 carbon atoms and can be the same or different from one another; each R.sup.2 represents a monovalent hydrocarbon group having from 1 to 4 carbon atoms and can be the same or different from one another; each Z represents a divalent hydrocarbon bonding group comprising from 1 to 16 carbon atoms can be the same or different from one another; and x is an integral or fractional number greater than or equal to 2.