Hydrocarbon Polymer Modifiers for Tire Compounds
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Solution Overview
Problem
Conventional processing oils used in tire compounding, such as aromatic oils, face health, safety, and environmental concerns, necessitating the development of alternative hydrocarbon polymer modifiers that are compatible with rubbers, maintain performance, and prevent additive migration in tire components.
Innovation Solution
The use of an interpolymer comprising piperylene, cyclic pentadiene, and aromatic components, which are immiscible with elastomers, forming chemical bonds with fillers and having reactive sites for co-curing, thereby improving tack, adhesion, and retention of properties in tire components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional aromatic oils are used as processing aids in tire components, then processing effectiveness and adhesion are improved, but health, safety, and environmental concerns arise due to PAH content
Solution Approach 1:
The patent changes the chemical composition parameters of processing oils by using hydrocarbon polymer modifiers with specific molecular weights, aromatic content ranges, and viscosity characteristics. These modified parameters maintain processing effectiveness while reducing harmful PAH content to comply with environmental regulations
Solution Approach 2:
The patent employs composite hydrocarbon polymer modifier systems combining different hydrocarbon polymers with specific properties. This composite approach allows optimization of both processing performance and environmental compatibility by selecting components with appropriate molecular structures and compositions
2Object-affected harmful factors
If alternative processing oils are used to replace aromatic oils, then health and environmental concerns are reduced, but adhesion and processing effectiveness may be compromised
Solution Approach 1:
The patent adjusts key parameters of alternative processing oils including aromatic content (5-50 wt%), molecular weight (200-10,000), and viscosity to optimize both environmental compatibility and adhesion performance. These parameter optimizations ensure that alternative oils maintain the necessary bonding characteristics without relying on harmful aromatic hydrocarbons
3Reliability
If immiscible resins are added to improve tire performance, then wet traction and temperature performance are enhanced, but additive migration and permanence issues arise
Solution Approach 1:
The patent uses composite hydrocarbon polymer modifier systems with specific molecular weight distributions and compositional ranges. This composite structure allows the material to maintain immiscibility for performance enhancement while the specific molecular characteristics prevent excessive migration, improving long-term compositional stability
Solution Approach 2:
The patent optimizes molecular weight parameters (200-10,000) and aromatic content parameters (5-50 wt%) of the hydrocarbon polymer modifiers. These parameter changes enable the material to achieve the desired balance between performance enhancement through immiscibility and stability through controlled migration resistance
4Object-affected harmful factors
If new hydrocarbon polymer modifiers are developed to replace aromatic oils, then environmental compliance is improved, but compatibility with existing rubber systems and cure processes must be maintained
Solution Approach 1:
The patent develops hydrocarbon polymer modifiers with universal compatibility across multiple rubber systems including natural rubber, synthetic rubbers, and their blends. The modifiers are designed to function effectively in various cure systems (sulfur, peroxide, metal oxide) and processing methods, providing multi-functional adaptability while maintaining environmental compliance
Solution Approach 2:
The patent adjusts compositional parameters of the hydrocarbon polymer modifiers including aromatic content, molecular weight, and viscosity to ensure compatibility with diverse rubber systems. These parameter optimizations allow the modifiers to work effectively across different rubber types and cure chemistries without compromising environmental performance
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 hydrocarbon polymer modifiers enhance the permanence and performance of tire compounds by reducing additive migration, improving adhesion, and maintaining desired properties over the tire's lifespan, while being cost-effective and environmentally friendly alternatives to aromatic oils.
Implementation Method 1
forming chemical bonds with fillers and having reactive sites for co-curing
Data Source
AI summary
An elastomeric composition incorporating a hydrocarbon polymer modifier including piperylene, cyclic pentadiene and aromatic components, and having a softening point from 80° C. to 160° C., z-average molecular weight greater than 10,000, and at least 1 mole percent aromatic hydrogen, based on the total moles of hydrogen in the modifier. In a method, the elastomeric composition is processed with a cure package into a composition in the desired shape, which is cured to form the article. The modifier may optionally be immiscible with an elastomer in the composition and/or co-cured with the elastomer or filler in the composition. A tire or tire component may include the elastomeric composition.