Adhesive composition, and resin material, rubber article, organic fiber-rubber composite, and tire using same
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Solution Overview
Problem
Conventional resorcin-free adhesive compositions for organic fiber-rubber composites face issues with mechanical stability under shear strain, adhesion properties, and workability due to high tackiness of rubber latex, leading to poor bonding and reduced cord strength.
Innovation Solution
A water-based adhesive composition containing rubber latex with unsaturated diene and polylysine, which suppresses tackiness and enhances adhesion without using resorcin, ensuring favorable adhesion properties and workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a water-based adhesive composition is used to reduce environmental impact, then the solvent volatility is reduced, but the viscosity control for dipping application becomes difficult
Solution Approach 1:
The patent changes the chemical composition parameters of the water-based adhesive by incorporating specific polymers and additives that allow viscosity adjustment without organic solvents. The adhesive composition includes water, polymer particles, and functional agents that can be tuned to achieve optimal dipping viscosity while maintaining water-based formulation.
2Stability of the object's composition
If the adhesive composition has high polarity to be water-soluble, then water-based formulation is achieved, but adhesion to low-polarity substrates becomes difficult
Solution Approach 1:
The patent uses polymer particles with specific surface properties as intermediaries between the water-based adhesive and the low-polarity substrate. These polymer particles have amphiphilic characteristics that allow them to interact with both water and organic fiber substrates, bridging the polarity gap and enabling effective adhesion.
Solution Approach 2:
The adhesive composition is formulated as a composite system containing water, polymer particles, and functional additives. This composite structure allows the adhesive to exhibit both water solubility and effective bonding to low-polarity substrates through the combined properties of its components.
3Strength
If rubber latex is used in the adhesive composition, then adhesion to rubber is improved, but tackiness increases causing poor workability
Solution Approach 1:
The patent applies local quality by incorporating rubber latex particles selectively within the water-based adhesive system. The rubber latex is distributed as discrete particles that provide localized adhesion to rubber substrates without causing overall excessive tackiness of the adhesive composition, enabling controlled application and drying.
4Object-affected harmful factors
If resorcin is eliminated from the adhesive composition, then environmental friendliness is improved, but mechanical stability under shear strain deteriorates
Solution Approach 1:
The patent replaces resorcin with alternative polymer-based components that provide the necessary mechanical stability without the environmental concerns of resorcin. The water-based polymer system uses modern polymer chemistry to achieve bond strength comparable to or exceeding traditional resorcin formulations.
Solution Approach 2:
The patent creates a composite adhesive system combining water-based polymers with functional additives that collectively provide mechanical stability under shear strain. This composite formulation eliminates resorcin while maintaining or improving bond strength through synergistic component interactions.
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 adhesive composition provides improved adhesion and workability, maintaining mechanical stability and cord strength while being environmentally friendly by eliminating the need for resorcin.
Implementation Method 1
polylysine, which suppresses tackiness and enhances adhesion without using resorcin
Implementation Method 2
a component contained in the water-based adhesive composition needs to have a polarity due to its aqueous nature, while on the other hand, the polarity of the component needs to be controlled in such a manner that the polarity does not decrease adhesion property
Data Source
AI summary
To provide an adhesive composition that can ensure a desired adhesion property without using resorcin and that does not impair workability during use, as well as a resin material, a rubber article, an organic fiber-rubber composite, and a tire using the adhesive composition. Provided is an adhesive composition containing (A) a rubber latex with unsaturated diene and (B) polylysine. Also provided are a resin material, a rubber article, an organic fiber-rubber composite, and a tire using this adhesive composition.