Acrylate Pressure-Sensitive Adhesive Composition for High-Speed Bubble Control
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Solution Overview
Problem
Acrylate-based pressure-sensitive adhesive compositions experience bubble formation during high-speed coating processes, leading to poor coating quality and reduced adhesive properties when excessive antifoaming agents are used to suppress bubbles.
Innovation Solution
A preparation method involving a monomer mixture with specific ratios of alkyl (meth)acrylate and hydroxyl or carboxyl group-containing monomers, emulsion polymerization with controlled initiator content, and addition of an antifoaming agent at optimized temperatures to minimize bubble formation while maintaining adhesive properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an excessive amount of antifoaming agent is added to suppress bubble generation, then bubble suppression is improved, but adhesive properties deteriorate
Solution Approach 1:
The patent optimizes the addition temperature parameter of the antifoaming agent (30-50°C) to achieve effective bubble suppression while maintaining adhesive properties. This parameter change allows the system to suppress bubbles without requiring excessive antifoaming agent that would harm adhesive performance.
2Productivity
If high-speed gravure coating process is used to increase productivity, then coating speed is improved, but bubble generation increases leading to poor coating quality
Solution Approach 1:
The patent performs preliminary action by adding the antifoaming agent before the coating process and conducting emulsion polymerization under controlled conditions. This preliminary preparation ensures that bubbles are suppressed in advance, allowing high-speed coating to proceed without generating excessive bubbles that would compromise coating quality.
Solution Approach 2:
The patent optimizes multiple parameters including antifoaming agent addition temperature (30-50°C), monomer composition ratios (1-5 parts hydroxyl/carboxyl group monomer per 100 parts monomer mixture), and initiator content (0.1-2 parts per 100 parts monomer mixture). These parameter optimizations enable the system to achieve both high coating speed and high coating quality by preventing bubble formation during the coating process.
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 method results in an acrylate-based pressure-sensitive adhesive composition with excellent ball tack, stable coating properties, and minimal bubble generation, suitable for high-speed coating processes with long-term antifoaming ability.
Implementation Method 1
adding an antifoaming agent to the emulsion-polymerized acrylate-based pressure-sensitive adhesive composition, wherein the monomer having a hydroxyl group or a carboxyl group is contained in an amount of 1 to 5 parts by weight based on 100 parts by weight of the monomer mixture
Data Source
AI summary
The present disclosure relates to a preparation method of an acrylate-based pressure-sensitive adhesive composition. According to the present disclosure, it is possible to provide a preparation method of an acrylate-based pressure-sensitive adhesive composition which exhibits high ball tack while suppressing the generation of bubbles due to its excellent antifoaming ability.