Aqueous dipping bath compositions for treating reinforcement inserts, and use and method for producing an adhesive reinforcement insert
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Solution Overview
Problem
Current solvent-based dipping bath compositions for reinforcing inserts in rubber products face issues such as the need for explosion protection due to harmful solvents like methylenediphenyl isocyanate, and insufficient filament bonding for stiff cords, while solvent-free alternatives lack sufficient adhesion.
Innovation Solution
An aqueous, solids-containing dipping bath composition comprising fully or partially blocked isocyanates, epoxy, surfactants, latex, and optional additives, which is essentially free of organic solvents and resorcinol-formaldehyde, providing improved adhesion and surface coverage without the hazards of solvent-based systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If solvent-based dipping bath compositions are used for treating reinforcing inserts, then adhesion and filament bonding are improved, but explosion protection requirements and harmful solvent exposure increase
Solution Approach 1:
The patent extracts and removes the harmful solvent component from the dipping bath composition, replacing it with an aqueous-based system. This eliminates the explosion hazard while maintaining the essential adhesive function through the use of blocked isocyanates that provide sufficient bonding without requiring flammable organic solvents.
Solution Approach 2:
The patent changes the fundamental parameter of the liquid phase from organic solvent to water-based medium. By using aqueous solutions with blocked isocyanates and adhesion promoters, the system achieves the necessary adhesion strength while completely eliminating the explosion risk associated with volatile organic solvents.
2Object-affected harmful factors
If solvent-free dipping bath compositions are used for treating reinforcing inserts, then explosion protection requirements are eliminated, but filament bonding and adhesion are insufficient
Solution Approach 1:
The patent creates a composite dipping bath composition that combines multiple functional components: blocked isocyanates for bonding, adhesion promoters for surface attachment, and aqueous carriers for delivery. This composite system achieves both safety (no explosion hazard) and performance (sufficient adhesion) by synergistically combining these different material components.
Solution Approach 2:
The patent introduces adhesion promoters as intermediary substances that facilitate bonding between the reinforcing insert and the blocked isocyanate system. These intermediaries enhance the adhesive performance of the solvent-free composition, ensuring sufficient filament bonding without requiring harmful solvents.
3Strength
If resorcinol-formaldehyde latex is used in dipping bath compositions, then adhesion is improved, but harmful chemical exposure and environmental concerns increase
Solution Approach 1:
The patent extracts and removes the harmful resorcinol-formaldehyde latex component from the dipping bath composition. Instead, it uses alternative adhesion promoters and blocked isocyanate systems that provide equivalent or superior adhesion performance without the carcinogenic and environmentally harmful properties of resorcinol and formaldehyde.
Solution Approach 2:
The patent replaces permanent, harmful chemical systems (resorcinol-formaldehyde crosslinking) with alternative chemistry that achieves adhesion through different mechanisms. The blocked isocyanates provide reversible, controllable bonding that can be activated when needed, avoiding the need for persistent harmful chemicals in the formulation.
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 composition achieves excellent adhesion in H-test and surface coverage, ensuring safe operation and effective bonding for stiff cords, without the need for special explosion protection or harmful solvents.
Implementation Method 1
The immersion bath composition contains blocked isocyanate and epoxy, which form adhesive bonds through chemical reaction
Implementation Method 2
The immersion bath composition contains surfactant to improve the wetting properties
Data Source
AI summary
The present invention relates to dip bath compositions for treating reinforcing inserts and their use in producing reinforced rubber products. Furthermore, the present invention relates to processes for producing an adhesive reinforcing insert.