Treatments to Improve Reclaimed Carbon-Rubber Bonding

Recycled carbon black for tires that provides good reinforcement and fracture resistance. The recycled carbon black is made from solid residue produced by pyrolyzing waste tires. This residue contains carbon black along with impurities like ash. The recycled carbon black has a higher ash content and lower carbon content compared to virgin carbon black. The key innovation is using this recycled carbon black in tire rubber compositions instead of virgin carbon black. This allows reducing the use of virgin carbon black in tires, which helps improve sustainability by recycling more tire waste. The recycled carbon black provides similar reinforcement to virgin carbon black while maintaining fracture resistance.

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Recycled carbon black for tires that improves reinforcement properties while maintaining fracture resistance compared to virgin carbon black. The recycled carbon black has specific particle size, surface area, and color characteristics. It is produced by pyrolyzing waste tires and separating out the carbon black. The recycled carbon black has a particle size D90 of 310 nm or less, a nitrogen adsorption surface area of 50-85 m2/g, and a specific tint strength of 55 or more. This allows making tires with better reinforcement properties from recycled carbon black compared to virgin carbon black.

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Rubber composition for tires that can maintain sufficient heat generation and wet performance for practical use even when recycled carbon black is blended. The composition includes diene rubber including styrene-butadiene copolymer rubber, silica, and recycled carbon black, the DBP oil absorption amount and compressed DBP of recycled carbon black are determined.

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Rubber composition for tires and tires that has practically sufficient adhesion to steel cords, durability, and low rolling resistance even when recycled carbon black is blended. The composition includes diene rubber, carbon black, recycled carbon black, and organic cobalt acid.

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Rubber composition for tires that can maintain adequate low heat generation and wear resistance for practical use even when recycled carbon black is blended, and a tire using the same. The composition includes a vulcanizing agent, a crosslinking agent, a vulcanization accelerator, and a crosslinking accelerator.

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Rubber composition for a tire capable of maintaining breaking strength and achieving low heat build-up even when part of the total amount of carbon black is replaced with recycled carbon black. The composition includes nitrogen adsorption specific surface area N 2 SA and DBP oil absorption of carbon black and recycled carbon black.

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Motorcycle tire tread rubber composition using recovered carbon black (rCB) derived from end-of-life tires. The composition improves tire performance while reducing carbon footprint compared to virgin carbon black. It uses blends like natural rubber, styrene-butadiene rubber, and butadiene rubber, along with rCB, to make motorcycle tire tread bases. The rCB replacement level can be 5-20%. The composition provides lower rolling resistance, better elasticity, and processability compared to virgin carbon black.

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High strength modified pyrolysis carbon black for rubber applications that improves the mechanical properties and strength of pyrolysis carbon black rubber compositions while increasing the amount of pyrolysis carbon black that can be used. The modification involves hydroxylating the pyrolysis carbon black and carbon fiber, and then adding a coupling agent to create a modified pyrolysis carbon black with enhanced binding force between the particles. This modified carbon black can be used in rubber formulations to improve rubber properties and enable higher loadings of pyrolysis carbon black compared to unmodified pyrolysis carbon black.

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Rubber composition with improved fracture properties and low zinc content filler for tires. The composition contains recovered carbon black from thermally decomposed rubber, but with a maximum zinc compound content of 13% by weight. This low zinc carbon black improves rubber properties like break strength and abrasion resistance compared to conventional carbon black. It also maintains good processability. The low zinc carbon black is recovered from tires by selectively choosing the decomposition site with the lowest zinc impurities.

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A diene-based rubber composition containing recycled waste tire powder rubber as one component. The composition improves the strength and reinforcing properties of recycled tire rubber compared to conventional waste tire powder. It involves modifying the crushed vulcanized rubber with a compound containing a nitroxide radical. This modified recycled rubber is blended with diene rubber and carbon black to make a tire compound. The carbon black has a specific surface area and the recycled rubber has a modified nitroxide functional group. The composition enables recycling waste tires into tire compounds with better properties compared to using unmodified waste tire powder.

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