Organic Titanate Zirconate Adhesion Layer for Metal Sealant Bonding
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Solution Overview
Problem
Existing adhesion-promoting technologies face challenges in enhancing the adhesion between metal substrates and free radical-polymerized sealants, as they often fail to provide a strong and durable bond, leading to potential delamination and reduced performance.
Innovation Solution
The development of an adhesion-promoting composition comprising organic titanates, organic zirconates, and alkoxysilanes, specifically combining amine-functional and alkenyl-functional alkoxysilanes with an organic solvent, which are heated and then mixed with organic titanates or zirconates to create a reacted adhesion-promoting layer that enhances the bonding between metal substrates and sealants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional adhesion-promoting layers are used, then the sealant can be applied to metal substrates, but the adhesive strength is insufficient leading to delamination
Solution Approach 1:
The adhesion-promoting layer combines organic titanates/zirconates with alkoxysilanes (amine-functional and alkenyl-functional) to create a composite material that provides both strong initial adhesion to the metal substrate and durable bonding to the sealant. This composite approach allows the layer to simultaneously achieve high adhesive strength and long-term bond reliability, resolving the contradiction between initial strength and lasting durability.
Solution Approach 2:
The invention modifies the chemical composition parameters of the adhesion-promoting layer by incorporating specific ratios of organic titanates/zirconates (1-30 wt%), amine-functional alkoxysilanes (1-30 wt%), and alkenyl-functional alkoxysilanes (1-30 wt%). These parameter changes enable the layer to optimize both adhesive strength and bond durability, transforming a single-function layer into a multi-functional system that addresses both strength and reliability requirements.
2Strength
If a multi-component adhesion-promoting composition is used, then adhesion performance is improved, but the composition and application process become more complex
Solution Approach 1:
The invention merges multiple adhesion-promoting components (organic titanates/zirconates, amine-functional alkoxysilanes, and alkenyl-functional alkoxysilanes) into a single integrated composition. This unified approach maintains improved adhesive strength while reducing application complexity, as the merged composition can be applied in one step rather than requiring separate application of multiple layers or components.
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 proposed solution significantly improves the adhesive strength of the sealant to metal substrates, providing a durable and reliable bond that withstands environmental and mechanical stresses, thereby enhancing the performance and longevity of the sealant application.
Implementation Method 1
heating the alkoxysilane composition to a temperature up to 100° C. for at least 30 minutes to provide a reacted alkoxysilane composition
Implementation Method 2
an adhesion-promoting layer overlying a substrate, wherein the adhesion-promoting layer comprises: from 10 wt % to 90 wt % of an organic titanate, an organic zirconate, or a combination thereof
Data Source
AI summary
Adhesion-promoting compositions containing organic titanates and/or organic zirconates and the use of the adhesion-promoting compositions to provide adhesion-promoting layers to enhance adhesion between metal substrates and an overlying free radical-polymerized sealant are disclosed.