Class / Patent application number | Description | Number of patent applications / Date published |
523352000 | Utilizing multistage coagulation of a solid polymer latex | 6 |
20110021664 | Elastomer Composite and Method for Producing It - A method of producing an elastomer composite. The method includes A) combining a first fluid comprising elastomer latex with a second fluid comprising particulate filler; B) causing the elastomer latex to coagulate, thereby forming masterbatch crumb; C) bringing the masterbatch crumb to a water content of about 1 weight percent to about 20 weight percent, thereby forming a dewatered coagulum; D) removing water from the dewatered coagulum by subjecting the dewatered coagulum to mechanical energy, thereby causing the dewatered coagulum to heat as a result of friction, while allowing the dewatered coagulum to achieve a temperature of about 130° C. to about 190° C., wherein water content is reduced to about 0.5% to about 3% and wherein substantially all of the decrease in water content is accomplished by evaporation, thereby producing a masticated masterbatch; and E) subjecting the masticated masterbatch to at least an additional 0.3 MJ/kg of mechanical energy while further reducing the water content. | 01-27-2011 |
20120172492 | FORMATION OF LATEX COAGULUM COMPOSITE - A method of producing a coagulated latex composite. A coagulating mixture of a first elastomer latex and a particulate filler slurry is flowed along a conduit, and a second elastomer latex is introduced into the flow of the coagulating mixture. | 07-05-2012 |
20140011915 | NITRILE RUBBERS WHICH OPTIONALLY CONTAIN ALKYLTHIO TERMINAL GROUPS AND WHICH ARE OPTIONALLY HYDROGENATED - An improved polymerization and process method allows the production of special nitrile rubbers which are characterized by a specific anion content and an excellent storage stability and allow a particularly good vulcanization rate and moreover result in vulcanized materials that have advantageous properties, especially with regard to the contact with metal components of molded parts based on said vulcanized materials. | 01-09-2014 |
20140088222 | VINYL CHLORIDE RESIN AGGREGATE PARTICLE, METHOD FOR PRODUCING SAME, AND GLOVES COMPRISING SAME - The present invention provides vinyl chloride-based resin aggregate particles capable of providing a plastisol with excellent non-infiltrating property and favorable sagging property, a method for producing the same, and a glove using the same. The vinyl chloride-based resin aggregate particles of the present invention have a mean volume particle diameter of 10 to 60 μm, and the percentage of particles having a particle diameter of 10 to 60 μm is at least 50 vol %. The moisture absorption coefficient is 1.5 wt % or less when being retained for 24 hours under conditions of 30° C. and a relative humidity of 97.0±0.4%. A plastisol comprising 100 weight parts of the vinyl chloride-based resin aggregate particles and 160 weight parts of di-2-ethylhexyl phthalate satisfies a relationship of 3≦η70/η40≦1000. Further, in the vinyl chloride-based resin aggregate particles of the present invention, the number of voids having a void size of 1.0 μm or more per one aggregate particle is less than 5.0, and the percentage of particles having a particle diameter of 1.0 μm or less after ultrasonic treatment is less than 3.0 vol %. | 03-27-2014 |
20140213696 | PROCESS FOR PREPARING GUAYULE NATURAL RUBBER - Embodiments of the invention provide a method of processing natural rubber latex using an extruder including a plurality of process zones by processing coagulant with latex to produce a coagulum and serum. In some embodiments, the coagulant can include an acid, a metal salt, or a mixture of both. Some embodiments can include a coagulum wash stage, and a deresination step. In some embodiments, the extruder can be operated to move coagulum through the extruder to remove at least some fraction of water to form a substantially dewatered coagulum, and a drying step to form a dried coagulum. In some embodiments, a stabilizer such as an antioxidant can be introduced into the extruder, and processed to remain in some fraction in the dried coagulum. Some alternative embodiments include a latex processing method of providing a flow of coagulant, and combining latex with the flowing using an emulsion dispensing bar. | 07-31-2014 |
20150105491 | Formation of Latex Coagulum Composite for Tire Composition - A tire comprising a rubber composition based on at least an elastomer composite formed by the method of flowing a coagulating mixture of a first elastomer latex comprising a first elastomer and a particulate filler slurry along a conduit; and introducing a second elastomer latex comprising a second elastomer into the flow of the coagulating mixture. | 04-16-2015 |