Tire Tread Vulcanization Using Nicotinamide and Strong Base
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Solution Overview
Problem
Existing methods for preparing tire treads with silica as a filler face challenges in achieving advantageous wear characteristics while avoiding deleterious impacts on cure properties when using strong bases as accelerators.
Innovation Solution
A method involving the mixing of rubber, silica, silica coupling agent, and nicotinamide in the presence of a strong base prior to introducing a curative, which synergistically enhances wear characteristics without negatively affecting cure properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strong bases are used as accelerators for sulfur curing, then cure properties are improved, but wear characteristics deteriorate
Solution Approach 1:
Nicotinamide is introduced as an intermediary substance that mediates between the strong base and the curing process. It allows the strong base to promote silica coupling without directly accelerating sulfur curing, thereby resolving the conflict between improving cure properties and maintaining wear characteristics
Solution Approach 2:
The invention changes the chemical environment parameters by introducing nicotinamide, which alters the reaction pathway. This parameter change allows the strong base to function as a coupling promoter rather than a curing accelerator, thus improving wear characteristics while maintaining cure properties through indirect chemical interaction
2Manufacturing precision
If strong bases are used to promote condensation reaction, then silica coupling is improved, but cure properties are negatively impacted
Solution Approach 1:
Nicotinamide serves as a protective intermediary that prevents the strong base from directly interacting with the sulfur curing system. It enables the strong base to promote silica coupling reactions while blocking its harmful accelerating effect on sulfur curing, thus resolving the contradiction between silica coupling improvement and cure property maintenance
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 method produces tire treads with improved wear characteristics while maintaining optimal cure properties, as demonstrated by the synergistic interaction of nicotinamide and the strong base.
Implementation Method 1
the silane unit reacts with the surface of the silica particle through a condensation reaction
Implementation Method 2
the mercapto unit reacts with unsaturation within the rubber and the silane unit reacts with the surface of the silica particle
Implementation Method 3
it is believed that the nicotinamide and the strong base synergistically interact or provide a synergistic impact and thereby yield the advantageous wear characteristics without deleteriously impacting cure properties
Data Source
AI summary
A method for preparing a vulcanizable composition of matter, the method comprising mixing rubber, silica, silica coupling agent, a strong base, and nicotinamide to form a masterbatch, introducing a curative to the masterbatch, and mixing the curative into the masterbatch to form a vulcanizable composition of matter.