One-Component Glass Primer with Extended Open Time
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Solution Overview
Problem
Current glass bonding agents have short open times, typically less than 20 seconds, which limits the time available for applying adhesives or sealants, and two-component primers often require additional labor and handling steps, while existing one-component primers have limited long-term usability.
Innovation Solution
Development of a one-component primer composition with extended open times ranging from 20 seconds to 180 days or longer, utilizing a first polymer reaction product of epoxy functional silane and amine functional monomers, and a second polymer reaction product of monomeric isocyanate and active hydrogen-containing monomers, allowing for a tenacious bond with glass substrates and enabling reactions with adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a one-component primer is used, then ease of operation is improved, but open time is limited to less than 20 seconds
Solution Approach 1:
The patent modifies the chemical composition parameters of the primer by incorporating specific ratios of silane-modified polymers and catalysts, enabling the primer to maintain extended open time (up to 90 days) while remaining a single-component system that is easy to apply
Solution Approach 2:
The invention uses composite material design by combining multiple functional components (silane-modified polymers, catalysts, and additives) in a single primer formulation, achieving both extended open time and ease of operation without requiring multi-component systems
2Duration of action of moving object
If a two-component primer is used, then open time is extended to 90 days or more, but device complexity and labor requirements increase
Solution Approach 1:
The patent merges the functions of multiple components into a single primer formulation, combining silane-modified polymers, catalysts, and additives in one component that provides extended open time (90 days or more) while eliminating the complexity of handling and mixing multiple separate components
3Reliability
If adhesive application is delayed beyond 20 seconds, then bonding quality deteriorates, but extending open time requires complex primer systems
Solution Approach 1:
The invention changes the chemical parameters of the primer system by using silane-modified polymers with specific functional groups and controlled catalyst concentrations, enabling the primer to maintain bonding quality (cohesive failure mode) for extended periods up to 90 days without requiring complex multi-component systems
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 primer composition provides a stable and tenacious bond with glass substrates over an extended period, allowing for flexible application times of adhesives or sealants, reducing labor and handling complexities, and maintaining adhesion characteristics under accelerated weathering conditions.
Implementation Method 1
a first functional group (e.g., at least one functional group containing silicon, and more specifically a silylated polymer) for forming a tenacious bond with a glass substrate to which it is applied
Implementation Method 2
the polymer further contains at least one amine functionality for reacting with an adhesive, preferably a polyurethane adhesive containing isocyanate functionality
Data Source
AI summary
A one component bonding agent, method of using and articles produced therefrom, comprising from about 3 to 60% by weight of the total primer weight, of a first polymer, the first polymer comprising the reaction product of from about 15 to 85% by weight, based on the total weight of the first polymer, of a first oligomer, wherein the first oligomer comprises the reaction product of an epoxy functional silane and an amine functional monomer and a second oligomer including the reaction product of a monomeric isocyanate and a functionalized tri-alkoxysilane.