Metal Soaps in Diene Rubber for Traction and Rolling Resistance
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Solution Overview
Problem
In the tire industry, it is challenging to enhance traction and durability while maintaining low rolling resistance, as improving one property often compromises others.
Innovation Solution
Incorporating specific metal soaps, such as aluminum di-soaps, into diene rubber compositions, which form cluster-like structures in non-polar solvents, enhancing tensile strength, tear strength, and wet traction while maintaining comparable rolling resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional additives are used to improve traction and durability, then tensile strength and tear resistance are improved, but rolling resistance increases
Solution Approach 1:
The patent changes the chemical parameters of the additive by using specific metal soaps (aluminum, iron, titanium, cobalt) with particular oxidation states (+3 or +4) and organic moieties. These parameter changes result in additives that improve strength properties without increasing rolling resistance, resolving the contradiction between strength improvement and energy loss.
Solution Approach 2:
The patent creates a composite system by combining diene rubber with metal soap additives that form cluster-like structures. This composite approach allows the metal soap to enhance tensile and tear strength while maintaining low rolling resistance, effectively resolving the contradiction between improved strength and reduced energy loss.
2Duration of action of stationary object
If metal soaps are incorporated to improve tensile strength, then durability is enhanced, but the complexity of composition formulation increases
Solution Approach 1:
The patent simplifies formulation complexity by defining specific parameter ranges for metal soaps (metals with +3 or +4 oxidation states, specific organic moieties). These clear parameter specifications make the formulation process more systematic and less complex, while still achieving enhanced durability through the improved tensile strength and tear 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 use of these metal soaps significantly improves tensile strength, tear strength, and wet traction while maintaining low rolling resistance, as demonstrated by the improved performance in rubber compositions.
Implementation Method 1
metal soaps, such as aluminum di-soaps, into diene rubber compositions, which form cluster-like structures in non-polar solvents
Data Source
AI summary
A composition includes a diene rubber and a metal soap of the formula:M being a metal with an oxidation state of +3 or +4, and each R being any independently selected organic moiety including hydrogen. In addition, a method of making a rubber composition includes combining a polar solvent, a base, and a carboxylic acid and mixing these to form a Solution A. A source of metal ions in solution is added to Solution A, whereby mixing forms Product A. The metal in the source of metal ions is selected from the group consisting of metals with an oxidation state of +3 or +4. The product is isolated from Solution A and then is combined with a diene rubber composition to form a useful article, such as the tread of a tire.