Self-wetting Adhesive Composition for Smooth Surfaces
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Solution Overview
Problem
Pressure-sensitive tapes face challenges in achieving optimal wet-out rates and peel strength when attaching objects to smooth surfaces like glass, requiring improvements in adhesive properties for reliable bonding and easy removal.
Innovation Solution
A composition comprising a solute copolymer component with a glass transition temperature (Tg) or melting temperature (Tm) of at least 25°C, a solvent monomer component including (meth)acrylate monomers and a multifunctional acrylate, and a plasticizer component with an acid group, which forms an adhesive film that self-wets on smooth surfaces, offering high shear holding power and scratch resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional adhesive compositions are used, then the adhesive can be applied to smooth surfaces, but the wet-out rate is insufficient and peel strength is inadequate
Solution Approach 1:
The patent modifies the chemical composition parameters of the adhesive by incorporating specific ratios of solute copolymer (5-40 parts), solvent monomer (60-95 parts), and plasticizer (5-100 parts), along with controlling the glass transition temperature (Tg) of the solute copolymer to be at least 25°C. These parameter changes optimize both the wet-out rate and peel strength simultaneously.
Solution Approach 2:
The invention uses a composite adhesive composition combining multiple components: solute copolymer, solvent monomer (comprising (meth)acrylate monomers and multifunctional acrylate), and plasticizer with acid group. This composite formulation achieves synergistic effects that improve both wet-out performance and bonding strength.
2Strength
If the adhesive formulation is optimized for high peel strength, then bonding reliability improves, but the wet-out rate decreases
Solution Approach 1:
The patent optimizes the balance between peel strength and wet-out rate by precisely controlling the composition parameters: solute copolymer content (5-40 parts), solvent monomer content (60-95 parts), and plasticizer content (5-100 parts). The Tg of the solute copolymer is controlled to be at least 25°C, which optimizes the balance between adhesion strength and wetting speed.
Solution Approach 2:
The plasticizer component with acid group acts as an intermediary substance that facilitates the interaction between the solute copolymer and the substrate. It modifies the adhesive properties to enable both rapid wet-out and strong bonding by mediating the adhesion mechanism.
3Ease of manufacture
If the adhesive composition is simplified, then manufacturing ease improves, but the balance of tack, peel adhesion, and cohesive strength deteriorates
Solution Approach 1:
The patent establishes specific parameter ranges for the adhesive composition: solute copolymer (5-40 parts), solvent monomer (60-95 parts), and plasticizer (5-100 parts), with the solute copolymer having Tg ≥ 25°C. These parameter specifications provide manufacturing guidance while ensuring the balanced performance of tack, peel adhesion, and cohesive strength.
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 adhesive film demonstrates excellent wet-out properties, high shear holding power, and scratch resistance, allowing for reliable bonding and easy removal from surfaces like glass, with a balance of tack, peel adhesion, and cohesive strength, suitable for various applications.
Implementation Method 1
The solute component optionally has one Tg or Tm of at least 25° C.
Implementation Method 2
a balance of tack, peel adhesion, and cohesive strength
Implementation Method 3
a solvent monomer component including (meth)acrylate monomers and a multifunctional acrylate
Implementation Method 4
The adhesive film demonstrates excellent wet-out properties
Implementation Method 5
a plasticizer component with an acid group
Implementation Method 6
the ability of the tapes to attach the object to the substrate
Data Source
AI summary
According to various embodiments of the present disclosure, a composition includes about 5 to about 40 parts by weight of a solute copolymer component. The solute component optionally has one Tg or Tm of at least 25° C. The composition further includes about 60 to about 95 parts by weight of a solvent monomer. The solvent monomer component includes (meth)acrylate monomers and a multifunctional acrylate. The sum of the solute copolymer component and the solvent monomer component is 100 parts by weight. The composition further includes about 5 to about 100 parts of a plasticizer, relative to the 100 parts. The plasticizer component comprises at least one plasticizer comprising an acid group.