Sulphur-Linkable Rubber Mixture for Tyre Traction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sulfur-crosslinkable rubber mixtures for vehicle tires do not adequately balance traction on snow, abrasion resistance, and other properties such as rolling resistance and braking behavior, often compromising one or more of these factors.
Innovation Solution
A sulfur-crosslinkable rubber mixture containing 25 to 300 phr of a hydrocarbon resin with specific molecular weight and softening point properties, combined with 50 to 100 phr of solution-polymerized diene rubber, optimized to improve traction on snow and abrasion resistance while maintaining or improving other properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional hydrocarbon resins are used in rubber mixtures, then processing aids and green stickiness are improved, but traction on snow and abrasion resistance are insufficient
Solution Approach 1:
The patent applies parameter changes by selecting hydrocarbon resins with specific molecular weight ranges (Mz: 2,500 to 10,000 g/mol) and softening point ranges (60°C to 120°C), along with controlled Q values (0.020 to 0.040 °C·g/mol). These precise parameter specifications optimize both the processing characteristics (green stickiness) and winter performance (traction on snow) of the rubber mixture, resolving the contradiction between ease of operation and reliability in snowy conditions.
2Ease of operation
If hydrocarbon resins are added to rubber mixtures, then green stickiness is improved, but abrasion resistance deteriorates
Solution Approach 1:
The patent resolves this contradiction through parameter changes by specifying narrow ranges for molecular weight (Mz: 2,500 to 10,000 g/mol) and softening point (60°C to 120°C) of the hydrocarbon resin. These controlled parameters ensure that the resin provides adequate green stickiness for processing while simultaneously maintaining or improving abrasion resistance, preventing the deterioration that occurs with conventional resins.
3Ease of manufacture
If existing rubber mixtures are formulated, then processing is feasible, but a balance between traction on snow, abrasion resistance, rolling resistance, and braking behavior cannot be achieved
Solution Approach 1:
The patent applies parameter changes by defining specific ranges for hydrocarbon resin content (25 to 300 phr), molecular weight (Mz: 2,500 to 10,000 g/mol), softening point (60°C to 120°C), and Q value (0.020 to 0.040 °C·g/mol). These coordinated parameter specifications enable simultaneous optimization of processing feasibility and balanced performance across multiple critical properties including traction on snow, abrasion resistance, rolling resistance, and braking behavior.
Solution Approach 2:
The patent employs composite materials by formulating a multi-component rubber mixture system that combines diene rubber (50 to 100 phr) with hydrocarbon resin (25 to 300 phr) and various additives. This composite approach allows the synergistic interaction between components to achieve balanced performance across multiple contradictory requirements, including winter traction, abrasion resistance, and processing characteristics.
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 mixture achieves enhanced traction on snow and increased abrasion resistance without compromising rolling resistance or braking performance, and maintains or improves other indicators like tensile strength and stiffness.
Implementation Method 1
They serve primarily as processing aids and give the rubber mixtures the necessary green stickiness. Furthermore, certain vulcanizate properties such as hardness, modulus and swelling behavior can be influenced by resins. They can also be used as vulcanization resins or adhesion promoters.
Implementation Method 2
The invention relates to a sulfur-crosslinkable rubber mixture and a vehicle tire. The rubber mixture contains 50 to 100 phr of at least one solution-polymerized diene rubber and 25 to 300 phr of a hydrocarbon resin
Data Source
AI summary
The invention relates to a sulfur-curable rubber compound and a vehicle tire incorporating the sulfur-curable rubber compound in at least one component. The sulfur-curable rubber compound exhibits optimized traction properties on snow and increased abrasion resistance with the same or improved other properties. For this purpose, the rubber compound comprises at least the following components: - At least one hydrocarbon resin, which consists of 50 to 100 wt.% aliphatic C5 monomers and 0 to 50 wt.% other monomers, wherein the hydrocarbon resin has a Q of 0.015 [°C·mol/g] to 0.050 [°C·mol/g] according to formula I): I) Q = softening point [°C] / centrifuge medium Mz [g/mol], and - At least one solution-polymerized diene rubber.