Tire Tread Rubber Composition for On-Ice Braking and Response
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rubber compositions for studless tire treads struggle to achieve both excellent on-ice braking performance and response performance on icy road surfaces.
Innovation Solution
A rubber composition for tire treads containing 1 to 50 parts by mass of a liquid aromatic resin with an aromatic vinyl compound as a constituent monomer, per 100 parts by mass of diene rubber, which provides improved grip and movement response on icy surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terpene resin or petroleum resin is added to improve on-ice braking performance, then on-ice braking performance is improved, but response performance on icy road surface deteriorates
Solution Approach 1:
The patent changes the key parameter from using conventional terpene resin or petroleum resin to using aromatic resin that is liquid at 23°C. This parameter change in the resin's physical state and chemical composition simultaneously improves on-ice braking performance while enhancing response performance, resolving the technical contradiction between these two properties.
Solution Approach 2:
The patent creates a composite rubber composition by combining diene rubber with aromatic resin (liquid at 23°C), porous cellulose particles, and silica. This composite material approach allows the synergistic effect of different components to achieve both excellent on-ice braking performance and response performance that cannot be achieved with single materials.
2Ease of operation
If aromatic resin liquid at 23°C is added to improve response performance, then response performance is improved, but on-ice braking performance may deteriorate
Solution Approach 1:
The patent specifies precise parameter ranges for the aromatic resin including glass transition temperature (−100°C or higher and 0°C or lower) and weight average molecular weight (500 to 30,000). These controlled parameter changes ensure that the resin provides both response performance and on-ice braking performance simultaneously.
Solution Approach 2:
The patent applies local quality by using porous cellulose particles (0.3 to 20 parts by mass per 100 parts diene rubber) in specific amounts and combinations with the aromatic resin. This localized optimization of material properties in different regions of the rubber composition achieves both response performance and on-ice braking performance.
Data Source
AI summary
The rubber composition for a tire tread according to the embodiment contains 1 to 50 parts by mass of an aromatic resin which contains an aromatic vinyl compound as a constituent monomer and which is liquid at 23° C. per 100 parts by mass of a diene rubber. The rubber composition has an on-ice braking performance and a response performance on an icy road surface.