Hardenable Polymer Composition Adhesive Force Control
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Solution Overview
Problem
Existing adhesive compositions, such as UV-cured hot-melt adhesives and moisture-crosslinkable silyl-terminated polymers, fail to provide controllable adhesive forces at the beginning of the bonding process and do not develop strong adhesive and cohesive forces, which are essential for certain applications like specialty tapes with thicker adhesive layers or semi-structural properties.
Innovation Solution
A hardenable polymer composition combining acrylate compounds and silyl-terminated polymers, along with a photoinitiator, which allows for miscibility at arbitrary ratios, enabling fine-tuning of adhesion characteristics to achieve both pressure-sensitive adhesion and strong cohesion properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If UV-cured hot-melt adhesives are used, then adhesive properties are improved, but cohesive forces remain weak even after prolonged UV radiation
Solution Approach 1:
The patent combines silyl-terminated polymers with hydrolyzable substituents (providing cohesive strength through moisture-crosslinking) with acrylate compounds (providing UV-curable adhesive properties) to create a composite adhesive system that achieves both strong adhesion and cohesion
2Strength
If silyl-terminated polymers with hydrolyzable substituents are used, then cohesive strength is improved, but controllable adhesive forces at the beginning of bonding process are not achieved
Solution Approach 1:
The patent incorporates photoinitiators and UV-reactive groups into the silyl-terminated polymer system, enabling preliminary UV-curing that establishes controllable initial adhesive forces before moisture-crosslinking develops full cohesive strength
3Adaptability or versatility
If thicker adhesive layers are used for semi-structural properties, then application versatility is improved, but cohesive forces and structural strength are insufficient
Solution Approach 1:
The patent changes the crosslinking mechanism parameter by introducing moisture-responsive silyl groups that form strong covalent bonds during curing, enabling thick adhesive layers to develop sufficient structural strength for semi-structural applications while maintaining versatility
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 combination of acrylate and silyl-terminated polymers with a photoinitiator in the polymer composition enables controllable initial adhesive forces and subsequent development of strong adhesive and cohesive forces, addressing the limitations of existing technologies by providing a versatile adhesive solution for various applications.
Implementation Method 1
at least one photoinitiator
Implementation Method 2
STPs with hydrolyzable substituents, such as alkoxy groups, are capable of condensing with one another yet at room temperature
Implementation Method 3
STPs with hydrolyzable substituents, such as alkoxy groups, are capable of condensing with one another yet at room temperature
Data Source
AI summary
The present invention relates to a hardenable polymer composition containing at least one acrylate compound, at least one silyl-terminated polymer and at least one photoinitiator, to the use of the polymer composition as or in an adhesive, a sealant, gasket, knifing filler or coating composition, and to an adhesive composition, a sealant composition, a gasket composition, a knifing filler composition or a coating composition comprising the polymer composition.