Silane-Functionalized Piperylene Resin for Tire Traction
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Solution Overview
Problem
Existing tire tread compounds with miscible resins suffer from reduced traction and handling at high speeds and temperatures, and current functionalized resin processes result in resins with low functionalization levels, necessitating a cost-effective method for producing highly-functionalized resins for high-performance tire treads.
Innovation Solution
A silane-functionalized resin composition is developed by simultaneously introducing a polymer backbone and a silane group in a reactor, using specific monomers and catalysts to achieve higher functionalization and improved properties for elastomeric compounds, specifically using piperylene-based polymer backbones and silane components in a cationic polymerization process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If miscible resins are used to increase traction characteristics, then overall traction is improved, but traction and handling are reduced at high speeds and high temperatures
Solution Approach 1:
The patent changes the chemical composition parameters of the resin by incorporating silane-functionalized components (at least 5 wt%, preferably 10-30 wt%) into the polymer matrix. This chemical modification alters the resin's functional properties, enabling it to maintain both high traction at low speeds and stable handling at high speeds and temperatures, thus resolving the contradiction between initial traction improvement and high-speed performance degradation.
2Reliability
If high softening point immiscible resins are used to solve high-speed performance, then tire performance at high speeds and temperatures is improved, but the functionalization level remains low when using conventional processes
Solution Approach 1:
The patent applies preliminary action by incorporating silane groups directly into the polymer backbone during the polymerization process itself, rather than attempting to functionalize the resin afterward. This in-situ functionalization ensures high functionalization levels (at least 5 wt% silane content) are achieved from the outset, eliminating the need for subsequent complex functionalization steps and ensuring consistent high-performance characteristics in the final tire product.
3Manufacturing precision
If functionalized resins are prepared following polymerization of the resin, then the resin can be functionalized, but the amount of functionalized component is low and the process is not cost effective
Solution Approach 1:
The patent merges two separate processes (polymerization and functionalization) into a single integrated process by incorporating silane groups during the polymerization step itself. This consolidation eliminates the need for separate functionalization steps, reduces manufacturing complexity, lowers costs, and achieves high functionalization levels (at least 5 wt% silane) in a single operation, thereby resolving both the functionalization level and cost-effectiveness concerns.
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 resulting resin composition exhibits superior dynamic mechanical properties, including enhanced durability, traction, and handling at extreme conditions, with improved storage modulus and reduced tan delta values, indicating improved tire performance without compromising traction.
Implementation Method 1
using specific monomers and catalysts to achieve higher functionalization and improved properties for elastomeric compounds, specifically using piperylene-based polymer backbones and silane components in a cationic polymerization process
Data Source
AI summary
This invention relates to a silane-functionalized resin composition having a polymer backbone, wherein the polymer backbone is selected from at least one of C5 homopolymers and copolymer resins, terpene homopolymer or copolymer resins, pinene homopolymer or copolymer resins, C9 homopolymers and copolymer resins, C5/C9 copolymer resins, alpha-methylstyrene homopolymer or copolymer resins, and combinations thereof, and wherein the polymer backbone is substantially free of styrene copolymer; and a silane, where the ratio of the mole percent of the silane to the mole percent of the polymer backbone in the composition is in the amount of 0.04 to 3.0 as determined by H-NMR.