Silane Mixture for Rubber Rolling Resistance and Wet Grip
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Solution Overview
Problem
Existing rubber mixtures face challenges in balancing rolling resistance and wet grip, with prior silane formulations not adequately addressing this conflict.
Innovation Solution
A silane mixture comprising specific silane compounds of formulas I and II, with a defined molar ratio, is developed to improve rolling resistance while maintaining wet grip performance, which can be applied to carriers or used as adhesion promoters and coupling agents in rubber mixtures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional silane formulations are used, then wet grip performance is maintained, but rolling resistance cannot be sufficiently reduced
Solution Approach 1:
The patent divides the silane crosslinking system into two distinct functional components: silane A (with terminal vinyl groups) provides primary crosslinking for structural integrity, while silane B (with pendant vinyl groups and specific molecular weight) provides secondary crosslinking that optimizes the balance between rolling resistance and wet grip. This segmentation allows each component to perform its specialized function without compromising the other.
Solution Approach 2:
The invention creates a composite silane system by combining two different silane compounds with specific structural characteristics. Silane A and silane B form a synergistic mixture where the terminal vinyl groups of silane A and pendant vinyl groups of silane B create a dual-crosslinking network that simultaneously reduces rolling resistance and maintains wet grip performance.
2Reliability
If silane crosslinking density is increased to improve wet grip, then rolling resistance increases
Solution Approach 1:
The patent applies local quality by creating different types of crosslinking sites within the rubber matrix: silane A provides dense crosslinking points for structural strength and wet grip, while silane B provides more distributed crosslinking that reduces energy loss. The specific molecular weight range of silane B (100-500 g/mol) and its pendant vinyl group configuration create localized crosslinking zones that optimize the wet grip/rolling resistance balance.
Solution Approach 2:
The invention changes the crosslinking parameters by introducing two different silane structures with distinct molecular weights, functional group configurations, and reactivity characteristics. This dual-parameter approach allows independent optimization of crosslinking density for wet grip versus crosslinking distribution for rolling resistance.
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 silane mixture effectively reduces rolling resistance and provides an improved solution to the conflicting objectives of rolling resistance and wet grip in rubber formulations, as demonstrated by improved rebound resilience tests.
Implementation Method 1
The silane of formula I (R1)y(R2)3-ySi-R3-(S-R4)nS-R5 (I), and a silane of formula II (R1)y(R2)3-ySi-R3-(S-R4)zS-R3-Si(R1)y(R2)3-y (II)
Implementation Method 2
The silane mixture may contain oligomers formed by hydrolysis and condensation of the silanes of formula I and/or silanes of formula II
Data Source
AI summary
The invention relates to silane mixtures containing a silane of formula I (R1))y(R2)3-ySi-R3-(S-R4)nS-R5 (I), and a silane of formula II (R1))y(R2)3-ySi-R3-(S-R4)zS-R3-Si(R1)y(R2)3-y (II), wherein the molar ratio of silane of formula I to silane of formula II is 20:80 - 90:10. The silane mixture according to the invention can be produced by mixing the silanes of formula I and silanes of formula II.