Modified Natural Rubber Viscosity Reduction
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Solution Overview
Problem
Conventional rubber compositions containing natural rubber fail to adequately reduce viscosity and hysteresis loss, limiting their molding processibility and fuel efficiency, especially in tread rubber for pneumatic tires.
Innovation Solution
A method involving the release of protein from natural rubber latex using organic compounds like formaldehyde, paraformaldehyde, or glyoxal, followed by drying and mixing with carbon black and silica, to create a modified rubber with reduced viscosity and hysteresis loss, enhancing molding processibility and dispersibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional rubber compositions containing natural rubber are used, then excellent mechanical properties are achieved, but viscosity is high and hysteresis loss is high
Solution Approach 1:
The patent extracts and removes proteins from natural rubber latex through chemical treatment with organic compounds (formaldehyde, paraformaldehyde, formalin, or glyoxal). This extraction of the harmful protein component reduces hysteresis loss and viscosity while preserving the beneficial mechanical properties of the natural rubber matrix.
Solution Approach 2:
The patent changes the chemical parameters of natural rubber by introducing cross-linking agents that modify the protein structure. This chemical modification alters the rheological properties of the rubber, reducing viscosity and hysteresis loss while maintaining mechanical strength.
2Strength
If conventional rubber compositions containing natural rubber are used, then excellent mechanical properties are achieved, but molding processibility is poor due to high viscosity
Solution Approach 1:
The patent removes proteins from natural rubber latex through chemical treatment, which eliminates the cause of high viscosity. This extraction improves molding processibility by reducing resistance to flow during processing while preserving the mechanical properties of the rubber matrix.
Solution Approach 2:
The patent modifies the rheological parameters of natural rubber through chemical cross-linking of proteins. This parameter change reduces viscosity and improves flow characteristics, enabling better molding processibility while maintaining mechanical strength.
3Adaptability or versatility
If modified natural rubber is produced by conventional modification means (cross-linking, graft polymerization, deproteinating), then new properties are imputed, but viscosity is not sufficiently reduced and hysteresis loss is not sufficiently reduced
Solution Approach 1:
The patent specifically targets and extracts proteins from modified natural rubber using organic compounds. This focused extraction approach more effectively reduces hysteresis loss compared to conventional modification methods, while preserving the adapted properties achieved through prior modification.
Solution Approach 2:
The patent creates a composite structure by combining modified natural rubber with cross-linked protein networks. This composite approach integrates the beneficial adapted properties of modified rubber with the structural benefits of cross-linked proteins, achieving low hysteresis loss and low viscosity simultaneously.
4Adaptability or versatility
If modified natural rubber is produced by conventional modification means, then new properties are imputed, but molding processibility is not sufficiently improved due to high viscosity
Solution Approach 1:
The patent removes proteins from conventionally modified natural rubber through chemical treatment. This extraction eliminates the viscosity-increasing effect of proteins, improving molding processibility while preserving the adapted properties achieved through modification.
Solution Approach 2:
The patent forms a composite material by combining modified natural rubber with cross-linked protein structures. This composite structure provides both the adapted properties of modified rubber and the low-viscosity characteristics needed for improved molding processibility.
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 results in a rubber composition with improved molding processibility and reduced hysteresis loss, suitable for tire tread applications, achieving stable high-quality tire production with enhanced fuel efficiency.
Implementation Method 1
releasing protein from rubber particles in a natural rubber latex by adding at least one organic compound selected from formaldehyde, paraformaldehyde, formalin, and glyoxal to the natural rubber latex
Implementation Method 2
The natural rubber latex is preferably dried by spraying in an atmosphere of shock waves generated by pulse combustion
Implementation Method 3
by mixing carbon black and/or silica into the modified natural rubber it is possible to improve the dispersibility of carbon black and silica
Data Source
AI summary
A method for producing a rubber composition, the method including: preparing a modified natural rubber by releasing protein from rubber particles in a natural rubber latex by adding at least one organic compound selected from formaldehyde, paraformaldehyde, formalin, and glyoxal to the above mentioned natural rubber latex and then drying so as to include the released protein therein; and mixing at least one selected from carbon black and silica in this modified natural rubber. Such method reduces viscosity and improves molding processibility of the rubber composition, as well as reducing hysteresis loss.