Aqueous dipping bath compositions for treating and using reinforcement inserts, and method for producing an adhesive reinforcement stone
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Solution Overview
Problem
Current solvent-based dipping bath compositions for reinforcing inserts in rubber products require explosion protection due to harmful solvents like methylenediphenyl isocyanate and result in insufficient filament bonding for stiff cords, while solvent-free alternatives lack adequate adhesion and surface coverage.
Innovation Solution
An aqueous, solids-containing dipping bath composition comprising fully or partially blocked isocyanates, epoxides, surfactants, and latexes, with optional additives, that is free or nearly free of organic solvents and resorcinol-formaldehyde, enhancing adhesion and surface coverage without the need for explosion protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If solvent-based dipping bath compositions are used to achieve good adhesion and filament bonding, then adhesion and surface coverage are improved, but explosion protection is required and health hazards increase due to harmful solvents like methylenediphenyl isocyanate
Solution Approach 1:
The patent changes the fundamental parameter of the dipping bath from solvent-based to water-based. The aqueous composition uses water as the continuous phase instead of organic solvents like toluene, eliminating flammability hazards while maintaining adhesion performance through the combination of blocked isocyanates, epoxides, and surfactants that enable effective coating and bonding
Solution Approach 2:
The patent converts the traditionally harmful role of solvents into a beneficial water-based system. By using water instead of flammable organic solvents, the invention eliminates explosion hazards while achieving comparable or superior adhesion through the synergistic action of blocked isocyanates (which provide bonding), epoxides (which enhance crosslinking), and surfactants (which improve wetting and distribution)
2Object-affected harmful factors
If solvent-free dipping bath compositions are used to eliminate explosion hazards, then safety is improved, but filament bonding is insufficient for stiff cords
Solution Approach 1:
The patent creates a composite adhesive system combining multiple functional components in an aqueous matrix: blocked isocyanates for primary bonding, epoxides for crosslinking and stiffening, and surfactants for wetting. This multi-component composite approach achieves sufficient filament bonding for stiff cord applications while maintaining the safety benefits of a solvent-free water-based formulation
Solution Approach 2:
The patent introduces surfactants as intermediary substances that facilitate the interaction between the aqueous adhesive and the reinforcing fibers. These surfactants improve wetting and distribution of the adhesive components on the fiber surface, enabling effective bonding without requiring organic solvents
3Strength
If resorcinol-formaldehyde latex is used to achieve good adhesion, then bonding is improved, but formaldehyde release and environmental concerns increase
Solution Approach 1:
The patent extracts and removes the harmful formaldehyde component from traditional resorcinol-formaldehyde latex systems. By replacing RFL with a water-based system using blocked isocyanates and epoxides, the invention eliminates formaldehyde release while maintaining adhesion performance through alternative bonding mechanisms that do not generate harmful byproducts
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 high adhesion and improved surface coverage in reinforced rubber products, particularly in belts, ensuring effective filament bonding and reducing health and safety risks associated with solvent use.
Implementation Method 1
at least one fully or partially blocked isocyanate
Implementation Method 2
at least one epoxide
Implementation Method 3
at least one surfactant for improving 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.