Alkoxy Silane Nitroso Primer for Rubber Glass Bonding
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Solution Overview
Problem
Current adhesive technologies for bonding polymers to hydroxylated surfaces, such as glass, face challenges in achieving strong and durable bonds, especially under flexing stress and in applications where traditional metal-based adhesives are not suitable due to corrosion or cost issues.
Innovation Solution
A method involving the application of a compound containing alkoxy silane moieties and aromatic nitroso or aromatic nitroso precursor moieties to the polymer and hydroxylated surface, which can react in situ to form a nitrosobenzene moiety, facilitating a strong and durable bond during the vulcanization process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional two-step bonding systems (primer + adhesive) are used for rubber to glass bonding, then bonding capability is achieved, but process complexity and manufacturing time increase
Solution Approach 1:
The patent combines the primer and adhesive functions into a single compound containing both alkoxy silane moieties (for glass surface bonding) and aromatic nitroso or aromatic nitroso precursor moieties (for rubber bonding). This single compound performs both priming and adhesive functions, eliminating the need for separate primer application and reducing process complexity while maintaining reliable bonding capability.
Solution Approach 2:
The single compound is designed with multi-functional moieties that enable it to perform multiple functions: the alkoxy silane portion bonds to the glass surface while the aromatic nitroso or precursor portion bonds to the rubber. This universal compound replaces the need for separate primer and adhesive products, simplifying the bonding system while achieving reliable rubber-to-glass adhesion.
2Strength
If conventional dinitrosobenzene formulations are used for rubber to glass bonding, then bonding strength is achieved, but toxicity increases
Solution Approach 1:
The patent changes the chemical parameters by using aromatic nitroso or aromatic nitroso precursor moieties instead of conventional dinitrosobenzene formulations. This substitution maintains the bonding strength required for rubber-to-glass applications while reducing the toxic harmful factors associated with dinitrosobenzene, making the bonding process safer and more environmentally friendly.
Solution Approach 2:
The patent employs aromatic nitroso precursors that can be converted to active nitroso groups in situ during the bonding process. These precursor compounds are less toxic than stable dinitrosobenzene formulations, providing a safer alternative that achieves the same bonding performance without the long-term toxicity concerns of conventional formulations.
3Duration of action of stationary object
If multi-step bonding processes are used for rubber to glass bonding, then bond durability is achieved, but manufacturing productivity decreases
Solution Approach 1:
The patent merges the primer and adhesive application steps into a single coating operation using a compound containing both alkoxy silane and aromatic nitroso/precursor moieties. This single-step process maintains durable bonding performance while significantly improving manufacturing productivity by eliminating the time and complexity associated with multi-step processes.
Solution Approach 2:
The single compound is designed to perform preliminary priming action and subsequent adhesive bonding in one application. The alkoxy silane moieties immediately interact with the glass surface while the aromatic nitroso or precursor moieties prepare for rubber bonding, achieving both priming and adhesive functions simultaneously to improve productivity without sacrificing bond durability.
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
This approach enables the formation of a one-part adhesive system that can be applied in a single step, providing excellent bond strength, hot water resistance, and solvent resistance, with reduced toxicity compared to conventional dinitrosobenzene formulations, and is effective for bonding rubber to glass substrates.
Implementation Method 1
at least one alkoxy silane moiety
Implementation Method 2
can react in situ to form a nitrosobenzene moiety
Implementation Method 3
providing excellent bond strength, hot water resistance, and solvent resistance
Data Source
AI summary
Methods for bonding polymeric substrates to hydroxylated surfaces such as glass are disclosed. The polymeric substrates may be elastomeric substrates such as a natural or synthetic rubber. The method may comprise applying a compound comprising at least one alkoxy silane moiety and at least one moiety selected from a nitrosoaromatic or a nitrosoaromatic precursor to one of the substrates. The nitrosoaromatic moiety may be a nitrosobenzene. The nitrosoaromatic precursor may be a nitrosobenzene precursor, such as at least one of a quinone dioxime or a quinone oxime. Novel primers and compounds suitable for use in the bonding process are also disclosed.