Low-Gloss Dry Erase Coating for Projection and Easy Marker Removal
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Solution Overview
Problem
Existing technologies lack a low gloss, durable, and field-applicable dry erase coating that can be used as a light projection surface without compromising marker removal and blending with traditional wall decor, and are not easily repairable or applicable in DIY projects.
Innovation Solution
A single component, ambient cured, low gloss polyurethane coating with a gloss level of 20-40 (60 degree gloss ASTM D523) that can be applied directly to various surfaces, providing a durable dry erase surface suitable for light projection and easy marker removal, and can be easily repaired.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high gloss coating is used, then marker removal performance is improved, but compatibility with traditional wall decor and light projection capability deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the gloss level parameter of the coating from traditional high gloss (90-100) to low gloss (20-40). This is achieved through formulation adjustments in the polyurethane coating composition, allowing the surface to maintain adequate marker removal performance while achieving compatibility with traditional wall decor and enabling light projection capability.
2Reliability
If two component epoxy coating is used, then dry erase performance is improved, but application complexity and labor skill requirements increase
Solution Approach 1:
The patent merges the two separate components (resin and catalyst) of traditional two-component epoxy coatings into a single-component polyurethane coating system. This consolidation eliminates the need for mixing and separate application steps, reducing application complexity and labor skill requirements while maintaining durable dry erase performance through the single-component formulation that cures upon exposure to moisture in the environment.
3Reliability
If two component coating is used, then dry erase characteristics are improved, but pot life is limited and application flexibility deteriorates
Solution Approach 1:
The patent implements self-service curing by formulating a single-component polyurethane coating that automatically cures upon exposure to environmental moisture. This eliminates the time-critical mixing and application window associated with two-component systems, allowing the coating to remain in its container indefinitely and be applied at the installer's convenience without pot life constraints, while still achieving durable dry erase characteristics.
4Adaptability or versatility
If field applied coating is used, then customization and seamless application are improved, but durability and repairability may deteriorate
Solution Approach 1:
The patent applies parameter changes by optimizing the polyurethane coating formulation to achieve a gloss level of 20-40, which balances the competing requirements of field applicability and performance durability. This parameter adjustment ensures the coating provides adequate marker removal performance, maintains compatibility with various substrates for seamless application, and achieves sufficient durability and repairability for long-term use in diverse field conditions.
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 a durable, low gloss dry erase surface suitable for light projection and marker removal, blends with traditional wall decor, and is easily applied and repaired, offering a cost-effective solution for DIY projects.
Implementation Method 1
a single component, 100% solids polyurethane, ambient cured, dry erase coating
Data Source
AI summary
A dry erase writing surface has a low gloss level of 20-40 that can be utilized as both a writable/erasable dry erase surface and a projection surface, formed by a single component, 100% solids polyurethane, ambient cured, dry erase-coating formulation. The coating formulation includes a low NCO isocyanate, a cure accelerating catalyst, a flow, leveling, and defoaming agent, a liquid matting agent to reduce the gloss level and the viscosity of the applied coating. —The surface is ready for use in 24 hours. The coating has a low VOC of 10 between 49 g/l and 99 g/l. The coating is applied to a prepared surface of a substrate to form a film thickness of 1-3 mils. Marks on the dry erase surface remain virtually invisible after 2500 cycles.