Bio-Derived Tread Rubber Composition for Low-Emission Tire Performance
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Solution Overview
Problem
Existing rubber tire compositions derived from fossil fuels face challenges in replicating the performance of conventional materials while reducing environmental emissions, necessitating the development of sustainable, bio-renewable alternatives that maintain or improve tire performance.
Innovation Solution
A tire rubber composition comprising a majority weight percent of renewable materials, including bio-derived elastomers, resins, and fillers such as silica and carbon black, which are partially or fully derived from renewable sources, replacing petroleum-derived components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If fossil fuel-derived materials (petroleum, coal, natural gas) are used in rubber tire compositions, then conventional performance standards are met, but environmental emissions (organics, sulfur compounds, carbon monoxide) increase
Solution Approach 1:
The patent changes the chemical composition parameters by replacing fossil fuel-derived materials with bio-derived alternatives. Specifically, it uses bio-derived polybutadiene (≥40 phr), bio-derived styrene-butadiene copolymer (≤35 phr), and bio-derived natural rubber (≤45 phr) to maintain tire performance while reducing environmental harm. The resin content is controlled at 5-20 phr and filler at 70-150 phr to optimize both performance and sustainability.
Solution Approach 2:
The patent employs a composite material system combining multiple bio-derived elastomers (polybutadiene, styrene-butadiene copolymer, natural rubber) with bio-derived resin and filler materials. This composite approach allows the sustainable composition to achieve performance metrics comparable to conventional fossil fuel-based tires, resolving the contradiction between environmental friendliness and performance reliability.
2Object-affected harmful factors
If bio-derived alternative materials are used to replace fossil fuel materials, then environmental impact is reduced, but replication of conventional material performance becomes difficult
Solution Approach 1:
The patent precisely controls the proportions of bio-derived materials to replicate conventional performance. It specifies polybutadiene at ≥40 phr, styrene-butadiene copolymer at ≤35 phr, natural rubber at ≤45 phr, resin at 5-20 phr, and filler at 70-150 phr. These parameter specifications ensure that the sustainable composition achieves performance metrics equivalent to fossil fuel-based formulations.
Solution Approach 2:
The patent creates a composite system using multiple bio-derived elastomers working synergistically. The combination of polybutadiene for abrasion resistance, styrene-butadiene copolymer for wet traction, and natural rubber for overall performance, along with bio-derived resin and filler, enables precise replication of conventional tire performance characteristics while maintaining sustainability.
Data Source
AI summary
A tire component formed from a rubber composition comprises a majority weight percent of renewable materials. The rubber composition comprises, based on 100 parts per weight (phr) of elastomer:a blend of at least two rubber elastomers selected from a group consisting of:from about 40 phr to about 50 phr polybutadiene;up to about 35 phr of styrene-butadiene copolymer;up to about 45 phr of natural rubber;a bio-derived resin material; anda bio-derived filler comprising silica and carbon black filler. The carbon black filler is at least partially derived from a bio-based feedstock prior to its addition to the rubber composition. The resin and the silica are also derived from renewable materials.