Tire Rubber Composition for Ice Braking and Failure Resistance
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Solution Overview
Problem
Pneumatic tires lack improved grip performance on icy surfaces and failure properties, with existing rubber compositions not effectively addressing braking performance on ice and failure characteristics.
Innovation Solution
A rubber composition for tires comprising 1 to 20 parts by mass of liquid polybutadiene with a glass transition temperature of −80° C. or less and 1 to 30 parts by mass of vegetable granules with a particle size of 0.1 to 500 μm, combined with a solid rubber component containing natural or isoprene rubber, is used to enhance braking performance on ice and failure properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing rubber compositions are used, then general tire performance is maintained, but braking performance on ice is insufficient
Solution Approach 1:
The patent uses a composite rubber composition incorporating vegetable granules (natural mineral filler) combined with specific rubber components (polybutadiene, styrene-butadiene rubber, sulfur) to create a material that provides both structural integrity and enhanced gripping capability on icy surfaces through the scratching mechanism of the vegetable granules
Solution Approach 2:
The patent specifies precise compositional parameters including vegetable granule content (3-30 parts by mass per 100 parts rubber component), particle size (0.1-500 μm), and sulfur content (0.5-3 parts by mass) to optimize the balance between braking performance on ice and overall tire durability
2Reliability
If vegetable granules are added to improve grip on ice, then braking performance may improve, but failure properties deteriorate
Solution Approach 1:
The patent optimizes the vegetable granule content within a specific range (3-30 parts by mass per 100 parts rubber component) and controls particle size (0.1-500 μm) to ensure sufficient scratching effect on ice while maintaining adequate structural strength and failure resistance of the tire tread
Solution Approach 2:
The patent creates a balanced composite formulation combining vegetable granules with specific ratios of polybutadiene, styrene-butadiene rubber, and sulfur to achieve synergistic effects where the organic-inorganic composite provides both ice-gripping capability and maintained structural integrity
3Stability of the object's composition
If liquid polybutadiene is used to plasticize rubber, then dispersibility improves, but molecular weight control becomes critical
Solution Approach 1:
The patent specifies a controlled molecular weight range for polybutadiene (5,000-50,000) to achieve optimal plasticizing effect that enhances dispersibility of the rubber composition while maintaining appropriate viscosity for processing and final product performance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The rubber composition provides excellent braking performance on ice and improved failure properties by incorporating vegetable granules that exert scratching effects on icy surfaces and plasticizing the rubber component with liquid polybutadiene, resulting in enhanced dispersibility and durability.
Implementation Method 1
plasticizing the rubber component with liquid polybutadiene
Implementation Method 2
vegetable granules that exert scratching effects on icy surfaces
Data Source
AI summary
Provided are a rubber composition for tires and a pneumatic tire, which are excellent in braking performance on ice and failure properties. The rubber composition for tires includes, per 100 parts by mass of a solid rubber component, 1 to 20 parts by mass of a liquid polybutadiene having a glass transition temperature of −80° C. or less and 1 to 30 parts by mass of vegetable granules having a particle size of 0.1 to 500 μm.