In an example, a process includes polymerizing a mixture that includes an ethylene monomer, a propylene monomer, and a diene monomer to form an ethylene-propylene-diene (EPDM) terpolymer using ring-opening metathesis polymerization (ROMP). The process further includes chemically reacting the EPDM terpolymer with a norbornene-based phosphinate cross-linking material to form a flame-retardant, cross-linked EPDM rubber.

Preparing a microbially desulfurized crumb rubber includes combining microorganisms capable of breaking crosslinked sulfur bonds, sulfur-containing crumb rubber, and a salt solution to yield a mixture; combining a buffer with the mixture to yield a buffered mixture, thereby adjusting a pH of the mixture; providing oxygen to the buffered mixture; incubating the buffered mixture for a length of time to yield a microbially desulfurized mixture; combining the microbially desulfurized mixture with bitumen to yield a precursor; and heating the precursor to yield the microbially desulfurized crumb rubber. The microbially desulfurized crumb rubber can be combined with bitumen to yield a modified bitumen. The modified bitumen can be combined with asphalt to yield a modified asphalt.

A method for synthesising polymers through devulcanisation from waste containing elastomers, the method including: a) contacting the waste containing elastomers with a solvent in the presence of a devulcanisation agent, b) heating the mixture produced in step a), at a temperature of between 20 C. and 250 C. for a period of between 15 minutes and 24 hours in the presence of a devulcanisation agent, the concentration of devulcanisation agent, and the ratio between the concentration of devulcanisation agent, expressed as parts per hundred of elastomer (phr) and a volume of solvent, expressed in ml, is: greater than 0.3 phr/ml of solvent or less than 0.2 phr/ml of solvent when the method is carried out in air, greater than 0.06 phr/ml of solvent when the method is carried out in an inert atmosphere.

This invention relates to a method for producing functionalized telechelic oligomers, comprising two steps. The first step relates to bringing a raw material comprising at least one high-molecular-weight polymer comprising at least two unsaturations, into contact with a solution comprising at least one metathesis catalyst and at least one functionalizing agent. The second step relates to the separation of the functionalized telechelic oligomers produced by the metathesis reaction in ionic liquid medium of the first step.

A new Acidithiobacillus ferrooxidans strain as well as a process for bacterially devulcanizing sulphur-vulcanized rubber particles and devulcanized rubber particles obtainable by the process.

A microcellular foaming nanocomposite includes an elastomeric polymer; a nanofiller; at least two of amphiphilic dispersing agents; a chemical blowing agent; an activator for chemical blowing agent; and a crosslinking agent. The present arrangement also relates to a preparation method of a microcellular foamed nanocomposite.

Provided is a 2-mercaptoimidazoline-containing masterbatch having exceptional properties for dispersing 2-mercaptimidazoline in a CR compound, and improved mold staining during molding. In the 2-mercaptoimidazoline-containing masterbatch, nitrile rubber is used as a binder material. A masterbatch containing 50-90 mass % of 2-mercaptoimidazoline and 10-50 mass % of nitrile rubber is preferred.

A method is provided for de-bonding objects contained in an article at an interface between the objects, wherein the objects are joined at the interface through an intermediate layer, which involves applying energy from a radiation source, wherein the energy is sufficient to cause destruction of bonds within the intermediate layer; and separating the two objects from one another.

The renewed rubber of this invention can be used in rubber formulations that are used in manufacturing a wide array of rubber products, including tires, power transmission belts, conveyor belts, hoses, and a wide array of other products. The present invention more specifically discloses a method for manufacturing an environmentally friendly, chemically functionalized, renewed rubber composition having a highly desirable combination of physical properties and which exhibits excellent processability comprising the steps of (1) blending a micronized rubber powder with a processing aid and a chemical functionalizing agent to produce a blended mixture; (2) processing the blended mixture under conditions of high shear and low temperature to produce a reacted mixture; (3) adding a stabilizer to the reacted mixture to produce the chemically functionalized renewed rubber composition.

The present invention is intended to provide a machine component composed of metal and rubber that results in no increase of material costs for an adhesive or increase of manufacturing costs for metal molding, causes no contamination of the metal mold or generates no foreign matter on the metal mold due to adhesion of the adhesive at the time of molding, causes no failure by separation of the adhesive from a fitting portion at the time of fitting the metal component, and is clean and favorable in appearance. A machine component 1 composed of metal and rubber is formed by applying a thermoset resin adhesive A to a surface of a metal component 2 of a predetermined shape, and vulcanizing and adhering a rubber 3 of a predetermined shape to part of the surface of the metal component 2 by metal molding.