The invention relates to a rubber composition based on at least one functionalized elastomer comprising polar functional groups, a reinforcing filler and a specific phenolic compound.

A thermoset material containing -hydroxyesters wherein said thermoset material is subject to a mechano-chemical process to regenerate an epoxide and a carboxylic acid functionality. A curative for epoxidized plant-based oils and epoxidized natural rubber is created from the reaction between a naturally occurring polyfunctional acid and an epoxidized plant-based oil is disclosed. The curative may be used to produce porosity-free castable resins and vulcanize rubber formulations based on epoxidized natural rubber. Materials made from disclosed materials may be advantageously used as leather substitutes.

This disclosure relates to improvements in water-borne (meth)acrylic coating compositions, and resulting coatings made using said compositions by the introduction of pre-cross-linked silicone rubber microparticles to enhance water resistance and water vapor permeance of (meth)acrylic binders while improving color retention properties when compared with silicone water-borne coatings. Additionally, when compared to commercially available water-borne silicone coatings, the technology shows improved shelf-life and better film formation leading to improved dirt pickup resistance and color retention.

A multilayer hose suitable for use as a fuel cell wet line hose includes: an elastomeric layer directly bonded to a polyamide (PA) barrier layer without an intervening adhesive layer, the elastomeric layer formed from a composition including: ethylene propylene diene monomer (EPDM); a peroxide cure system; a diacrylate crosslinking co-agent; and a maleic anhydride functionalized polybutadiene crosslinking co-agent. The EPDM elastomeric layer provides flexibility and elasticity, as well as enhanced chemical resistance and permeation resistance to the water vapor in the fuel cell wet line. The PA barrier layer provides enhanced permeation resistance to the hydrogen gas to reduce hydrogen fuel losses in the fuel cell wet line. The crosslinking co-agents combined with the peroxide cure system provides exceptional bonding performance of the elastomeric EPDM layer to the PA barrier layer with a dual mechanism bonding approach, thereby eliminating the need for an intervening adhesive layer.

The present invention provides a master batch for rubber modification, the master batch containing a rubber component and cellulose nanofibers in such a manner that the cellulose nanofibers are well dispersed in the rubber, and the master batch enabling the achievement of a rubber composition that exhibits excellent ozone resistance and mechanical characteristics after being cured; and a rubber composition which uses this master batch for rubber modification. One embodiment of the present invention provides a hydrogenated conjugated diene polymer composition which contains a hydrogenated conjugated diene polymer and cellulose nanofibers. With respect to the hydrogenated conjugated diene polymer in this embodiment, the hydrogenation degree of a structural unit derived from a conjugated diene compound is 30% by mole to 99% by mole. Another embodiment of the present invention provides a master batch for rubber modification, the master batch containing 100 parts by mass of a first rubber component that contains 50% by mass or more of a hydrogenated conjugated diene polymer, and 15 parts by mass to 100 parts by mass of cellulose nanofibers.

A water-based treatment agent of the present invention is a water-based treatment agent for producing a coating of a rubber-reinforcing member. The water-based treatment agent of the present invention includes: a rubber latex; and at least one selected from the group consisting of a compound A represented by the following formula (1) and a compound B represented by the following formula (2).

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CVT belts have a body extending over the entire section of the belt and have cords made with carbon or PBO fibres and having a central Axis I along their length. The body is made from a single compound-of a nitrile group-containing copolymer rubber as main elastomer. The belt has a top toothing, an axis A orthogonal to said central axis and extending at a point where the thickness of the belt is the highest, a cross-section defined by a section plane orthogonal to said central axis I and taken at the axis A. The cross-section has a trapezoidal shape, a top side defining a top width, a bottom side defining a bottom width, and two lateral sides.

The invention relates to a process for preparing a rubber composition which comprises an elastomer matrix which includes natural rubber and a synthetic diene elastomer, a modifying agent comprising a nitrile oxide dipole and an N-substituted imidazole function, a reinforcing filler comprising more than 50% by mass of a silica, a silane coupling agent and a vulcanization system, which process comprises prior kneading of the elastomer matrix alone before proceeding with the non-productive and productive kneading steps. The process enables a good compromise between the properties of hysteresis and stiffness and the amount of modifying agent.

The present disclosure relates to thermoplastic protein elastomer compositions comprising protein, at least one reactive thermoplastic elastomer, and at least one softener, as well as composite materials made from these compositions. Methods of making and using the thermoplastic protein elastomer composite materials to produce engineered leather are also disclosed. In some embodiments, the protein is selected from the group consisting of: soy protein, cellulase, zein protein, egg white albumin, and pea protein; and wherein the protein and the thermoplastic elastomer are not covalently bound together. In some embodiments, the protein and the thermoplastic elastomer are present in co-continuous phases.

The dynamic fatigue and hysteresis performances of fiber reinforced rubber compounds are compared using different plasticizers. Polymer-based fiber reinforced rubber compounds including a non-linear functionalized fatty acid ester, preferably a trimellitate, and more preferably Tris (2-Ethylhexyl) Trimellitate (TOTM) are shown to demonstrate greatly improved dynamic fatigue and hysteretic performance as compared to reference fiber reinforced rubber compounds including conventional reference plasticizers such as Di-isodecyl phthalate (DIDP).