Water-Based Adhesion Composition for Fast Drying and Shear Resistance
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Solution Overview
Problem
Water-based inks face challenges in high press speeds due to slow drying times and the need for effective alternatives to solvent-based inks, particularly in achieving better adhesion to low-energy substrates and improved cohesion and resistance to shear.
Innovation Solution
A water-based adhesion composition comprising a first polymer, a second polymer with a different molecular weight, a surfactant, and water, with specific particle size and molecular weight ranges, is used to enhance adhesion and cohesion properties in water-based materials, including inks and coatings, by forming a high solids content emulsion that can be added to existing formulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water-based inks are used instead of solvent-based inks, then environmental safety and health benefits are improved, but drying speed decreases
Solution Approach 1:
The patent modifies the chemical composition parameters of water-based inks by incorporating specific polymer emulsions with controlled molecular weights and compositions. This allows optimization of evaporation rates and film formation properties to improve drying speed while maintaining the environmental benefits of water-based formulations.
Solution Approach 2:
The invention uses composite polymer emulsion systems combining different polymer types (acrylic, vinyl, styrene-butadiene) with specific functional additives. This composite approach enables simultaneous optimization of multiple properties including drying speed, adhesion, and environmental compatibility that cannot be achieved with single-component systems.
2Object-affected harmful factors
If water-based adhesives are used instead of solvent-based adhesives, then toxicological properties are improved, but adhesion to low-energy substrates decreases
Solution Approach 1:
The patent employs polymer emulsions with specific local molecular characteristics and functional groups tailored for bonding to low-energy substrates. The emulsion particles are designed with surface properties that enhance interfacial adhesion while maintaining the bulk water-based composition for environmental safety.
Solution Approach 2:
The invention optimizes molecular weight parameters and chemical composition of the polymer emulsion to achieve balanced adhesion performance. By controlling parameters such as glass transition temperature, functional group density, and particle size distribution, the adhesive achieves strong bonding to difficult substrates while remaining water-based.
3Object-affected harmful factors
If water-based formulations are used, then environmental friendliness is improved, but resistance to shear and cohesion decreases
Solution Approach 1:
The patent creates composite adhesive systems combining multiple polymer emulsions with complementary properties. The synergistic interaction between different polymer components enhances cohesive strength and shear resistance while maintaining the water-based environmentally friendly formulation.
Solution Approach 2:
The invention utilizes spherical emulsion particle morphology with optimized size distribution to enhance packing density and interparticle bonding. The spherical shape facilitates uniform distribution and effective stress transfer, improving mechanical strength properties of the cured adhesive.
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 adhesion composition provides improved adhesion and cohesion, faster drying times, and increased resistance to shear and environmental factors, enabling the use of water-based materials in demanding applications previously served by solvent-based technologies.
Implementation Method 1
forming a high solids content emulsion that can be added to existing formulations
Implementation Method 2
a surfactant
Data Source
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AI summary
An adhesion composition comprising (a) a first polymer selected from the group consisting of acrylic polymers, acrylonitrile butadiene, butyl rubber, cellulose acetate, cellulose butyrate, epoxy resins, ethylene vinyl acetate, natural rubber, neoprene, phenolic polymers, polyurethanes, polyvinyl acetate, polyvinyl alcohol, styrene butadiene rubber, casein, dextrin, starch, copolymers thereof and combinations thereof; ( b) a second polymer selected from the group consisting of ethylene-acrylic acid copolymer, oxidized polyethylene, oxidized ethylene-vinyl acetate copolymer, maleated polyolefin and combinations thereof; and c) surfactant; and (d) water, where the amount of said water, said first polymer and said second polymer is sufficient to a solids content of greater than about 30% based on the total weight of components (a) - (d) in the adhesion composition and where said first polymer and said second polymer comprise solid particles having a D50 particle size of from about 10 nanometers (nm) to about 2000 nm. Applications of the composition are also disclosed.