Acrylic Pressure-Sensitive Adhesive Crosslinking for Flame Resistance
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Solution Overview
Problem
Surface finishing materials in sticker form, composed of organic materials, are prone to combustion and existing flame retardant solutions either fail to provide substantial flame resistance or increase production defects, while also posing environmental and health concerns due to the use of volatile organic compounds and solvents.
Innovation Solution
A water-based acrylic pressure-sensitive adhesive composition that includes a crosslinking agent with 5 to 15 alkyleneoxide groups and a flame retardant, forming a crosslinking structure to enhance adhesive properties and fireproof performance without using organic solvents, thereby improving the dispersion and effectiveness of the flame retardant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large amount of flame retardant is added to provide flame resistance, then flame retardant effect is improved, but production defective rate increases
Solution Approach 1:
The patent changes the chemical structure parameters of the adhesive resin by selecting specific acrylic copolymers with controlled composition ratios and molecular weights, and by using crosslinking agents with specific alkylene oxide group counts (5-15 groups), thereby achieving optimal flame resistance with reduced flame retardant dosage and minimizing production defects
Solution Approach 2:
The patent creates a composite system combining acrylic copolymer resin, crosslinking agent, and flame retardant in specific proportions to achieve synergistic effects where the crosslinked network structure enhances flame resistance without requiring excessive flame retardant addition, thus reducing production defects
2Reliability
If conventional flame retardants are used to provide fireproof effect, then flame retardant function is added, but adhesive properties deteriorate
Solution Approach 1:
The patent optimizes the chemical parameters of the adhesive system by selecting acrylic copolymers with specific functional groups and crosslinking agents with controlled alkylene oxide chain lengths, creating a balanced formulation that maintains strong adhesive bonding while achieving effective fireproof protection
Solution Approach 2:
The crosslinking agent acts as an intermediary that bridges the adhesive resin and flame retardant components, creating a crosslinked network structure that simultaneously enhances both adhesive performance and flame resistance without the negative interactions that occur with conventional additive approaches
3Ease of operation
If organic solvents are used in adhesive formulation, then adhesive application is facilitated, but environmental harm and health issues increase
Solution Approach 1:
The patent fundamentally changes the solvent parameter from organic to water-based, formulating the adhesive as an aqueous dispersion that eliminates volatile organic compounds while maintaining proper rheological properties and application characteristics through careful selection of acrylic copolymer composition and crosslinking density
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 solution achieves excellent adhesive properties and fireproof performance by controlling the crosslinking structure and dispersion of the flame retardant, reducing the risk of combustion and environmental impact while maintaining economic efficiency.
Implementation Method 1
acrylic copolymer (A) formed by copolymerizing i) 50 to 90 parts by weight of alkyl(meth)acrylic acid ester monomer wherein the carbon atom of alkyl group is 2 to 14, ii) 1 to 10 parts by weight of monomer having a functional group capable of crosslinking
Implementation Method 2
surface finishing material in the sticker type is easily combusted since it is composed of organic materials of carbon, hydrogen, and oxygen
Implementation Method 3
a water-based adhesive using water as dispersant has been increased
Data Source
AI summary
An acrylic pressure-sensitive adhesive composition according to the present invention comprises: acrylic copolymer (A) formed by copolymerizing i) alkyl(meth)acrylic acid ester monomer wherein the carbon atom of alkyl group is 2 to 14, ii) monomer having a functional group capable of crosslinking, iii) methyl(meth)acrylate monomer, iv) vinyl acetate monomer, v) glycidyl(meth)acrylate, and vi) crosslinking agent having 5 to 15 of alkyleneoxide groups and at least two acrylate group or vinyl group; and flame retardant (B). The acrylic pressure-sensitive adhesive composition improves the adhesive property and the dispersion of the flame retardant by controlling the crosslinking structure of the acrylic copolymer, such that a surface finishing material comprising the same can have the excellent adhesion and fireproof.