Silane-Nitroso Compound for Rubber-Metal Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rubber-to-metal bonding technologies face challenges in achieving strong and durable bonds, particularly in terms of bond strength, ease of application, reduced toxicity, and environmental impact, with limitations in single-coat systems and compatibility with various rubber and metal substrates.
Innovation Solution
A compound comprising alkoxy silane moieties and aromatic nitroso or nitroso precursor moieties, which can be applied in a single step to form strong and durable bonds between rubber and metal substrates, allowing for in-situ formation of nitrosobenzene or dinitrosobenzene moieties, enabling bonding even on unvulcanized rubber, with reduced toxicity and improved environmental properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a traditional two-step system (primer + adhesive) is used for rubber-to-metal bonding, then bond strength can be achieved, but the complexity of application and manufacturing increases
Solution Approach 1:
The patent combines the primer and adhesive functions into a single integrated adhesive composition. The adhesive comprises both the bonding agent and the silane-modified polymer in one formulation, eliminating the need for separate primer application. This single-coat system maintains bond strength while reducing application complexity and manufacturing steps.
Solution Approach 2:
The adhesive composition performs multiple functions simultaneously: it acts as both the bonding agent and the polymer modifier. The silane-modified polymer provides both adhesion to metal and compatibility with rubber, while the cross-linker system enables curing. This multi-functionality reduces the number of separate products needed.
2Reliability
If traditional adhesive formulations are used, then bonding can be achieved, but toxicity and environmental impact increase
Solution Approach 1:
The patent changes the chemical composition parameters by using silane-modified polymers and alternative cross-linking systems that reduce toxicity. The formulation replaces traditional toxic adhesive components with environmentally friendly alternatives while maintaining bonding reliability through controlled cross-linking and proper silane hydrolysis.
3Ease of operation
If single-coat systems are implemented, then ease of application improves, but achieving consistent bond strength becomes more difficult
Solution Approach 1:
The adhesive composition is pre-formulated with the silane-modified polymer and cross-linker already combined in optimal proportions. The silane groups are pre-attached to the polymer chains, so when applied to the metal surface, the cross-linking begins immediately without requiring separate primer application. This preliminary preparation ensures consistent bond strength while maintaining ease of application.
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 solution achieves high bond strength with 85-100% rubber failure in bonding tests, exhibits hot water and solvent resistance, and reduces the complexity of traditional two-step systems, allowing for easier application and improved durability under mechanical stress and aggressive environments.
Implementation Method 1
the silanes are thus hydrolysed, either separately or together, prior to application to the metal
Implementation Method 2
at least one moiety selected from an aromatic nitroso or an aromatic nitroso precursor
Data Source
AI summary
A compound comprising at least one alkoxy silane moiety; and at least one moiety selected from a nitrosobenzene or a nitrosobenzene precursor and combinations thereof are provided and usedin polymer to metal, in particular rubber to metal bonding. The nitrosobenzene precursor may be at least one of a quinone dioxime or a quinone oxime. The invention also provides for a compound comprising at least one alkoxy silane moiety; and at least one moiety selected from an aromatic nitroso or an aromatic nitroso precursor and combinations thereof.