Low-Gloss Dry-Erase Coating via Acrylate Silica Phase Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing EB/UV-curable dry-erase coatings produce high-gloss surfaces that cause eyestrain and are difficult to view from certain angles, and current methods to reduce gloss, such as surface roughening and additive use, introduce issues like ghosting and require dispersing agents.
Innovation Solution
A low-gloss EB/UV-curable dry-erase coating formulation using an acrylate silica blend, which eliminates the need for dispersing equipment and additives by forming an incompatible phase during curing to produce microroughness, reducing gloss while maintaining abrasion and chemical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If surface roughening agents or matting additives are introduced to reduce gloss, then low-gloss surface is achieved, but ghosting increases and dispersing agents/equipment are required
Solution Approach 1:
The patent extracts and eliminates the need for separate matting additives and dispersing agents by incorporating the gloss-reducing function directly into the base coating formulation itself. The base coating is designed to inherently produce low-gloss surfaces through its composition and curing characteristics, removing the need for additional functional additives that cause ghosting.
Solution Approach 2:
The patent merges the gloss-reducing function with the base coating formulation by incorporating specific pigment particles and polymer components directly into the base coating composition. This integration allows the base coating to simultaneously provide structural integrity and low-gloss properties without requiring separate matting agents.
2Illumination intensity
If surface roughening is used to reduce gloss, then low-gloss surface is achieved, but sites trap stains and inks producing ghosting
Solution Approach 1:
The patent changes the physical and chemical parameters of the base coating formulation by incorporating specific pigment particles (such as titanium dioxide, zinc oxide, or calcium carbonate) and polymer components that cure to form a low-gloss surface. This parameter change achieves gloss reduction through the coating's inherent properties rather than post-curing roughening.
3Manufacturing precision
If dispersing agents and equipment are used to evenly disperse additives, then uniform coating is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent enables the base coating formulation to self-disperse its components through its own compositional design. The formulation includes specifically selected polymer components and pigment particles that are compatible with each other and automatically distribute uniformly during coating application and curing, eliminating the need for external dispersing agents or complex dispersing equipment.
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 coating achieves low-gloss surfaces with enhanced dry-erase properties, superior writability, and flexibility, minimizing ghosting and the use of dispersing agents, while maintaining hardness and chemical resistance.
Implementation Method 1
forming an incompatible phase during curing to produce microroughness
Implementation Method 2
produce microroughness, reducing gloss
Implementation Method 3
EB (electron beam) curable
Implementation Method 4
UV (ultra violet) curable
Implementation Method 5
EB/UV-curable coatings
Data Source
AI summary
An EB (electron beam) or UV (ultra violet) curable, low-gloss, dry-erase coating formulation for static and electronic whiteboards is disclosed. The coating contains an acrylate silica blend, an aliphatic urethane acrylate or a polyester acrylate, a polyfunctional reactive diluent and at least one photoinitiator.