Bio-Based Tire Sealant Composition for Puncture Repair
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Solution Overview
Problem
Conventional sealant compositions for tires often rely on petroleum-based materials and lack effective puncture repair capabilities, particularly in pneumatic tires, which can lead to vehicle inoperability or costly repairs.
Innovation Solution
A sealant composition comprising biorubber, plant resin or plant oil, and a filler, with a viscosity of 200 to 500 Pa-S at 100 °C, applied to tire components such as the tread, body plies, or air barrier layers, providing a non-petroleum based solution for puncture repair and durability enhancement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional petroleum-based sealant compositions are used, then the sealant provides basic puncture repair capability, but the environmental sustainability and performance effectiveness are insufficient
Solution Approach 1:
The patent changes the chemical composition parameters of the sealant by replacing petroleum-based materials with bio-based alternatives (biorubber, plant resins, plant oils). This substitution maintains the sealant's viscosity range (200-500 Pa·S at 100°C) and puncture repair functionality while eliminating harmful petroleum derivatives, achieving both reliability and environmental sustainability
Solution Approach 2:
The patent creates a composite sealant formulation combining multiple bio-based materials (biorubber as base polymer, plant resins or plant oils as softeners, and optional fillers like silica or carbon black). This composite approach synergistically integrates the advantages of each component to achieve effective puncture sealing while maintaining non-petroleum composition
2Productivity
If the sealant viscosity is reduced to improve flow into punctures, then the puncture plugging efficiency increases, but the tire durability and sealant stability decrease
Solution Approach 1:
The patent optimizes the viscosity parameter to a specific range (200-500 Pa·S at 100°C) that balances flow characteristics and structural integrity. This controlled viscosity enables sufficient flow into puncture channels while maintaining adequate strength to form durable seals and withstand tire operating conditions
Solution Approach 2:
The sealant exhibits different effective properties at different stages: at application temperature it achieves lower viscosity for optimal flow into punctures, while at service temperature it maintains higher viscosity and strength for durable sealing. The biorubber-plant resin/oil system provides this temperature-dependent property variation
3Object-generated harmful factors
If a high percentage of non-petroleum ingredients is used, then the environmental sustainability improves, but the sealant composition stability and performance consistency worsen
Solution Approach 1:
The patent formulates a composite system using biorubber combined with plant resins or plant oils that complements the properties of each component. The plant resin/oil acts as a softener that enhances the processability and stability of the bio-based formulation, ensuring consistent performance while maintaining high non-petroleum content (at least 70 weight %)
Solution Approach 2:
The patent specifies precise compositional parameters including viscosity (200-500 Pa·S at 100°C), water content (no more than 5% by weight), and ingredient ratios to ensure composition stability. These controlled parameters guarantee reproducible performance consistency across different batches of the bio-based sealant
Data Source
AI summary
Disclosed herein are a sealant composition for use with tires, a tire having at least one component with at least one surface at least partially coated with the sealant composition, and related methods for applying the sealant composition to tires. The sealant composition comprises biorubber and a softener comprising at least one of plant oil or plant resin and has a non-petroleum content of at least 70% by weight.