Tablet Powder Coatings for Fast Mixing and Wood Adhesion

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Solution Overview

Problem

Existing water-based chalk paints and redispersible powder paints face issues such as contamination, mold growth, skin irritation, laborious mixing processes, and undesirable discoloration on wooden substrates, limiting their use and market penetration.

Innovation Solution

Development of powder coating paints in solid dosage form, specifically chalk paints, with a spherical tablet shape and optimized particle size, which dissolve quickly and easily in water without agitators, ensuring homogeneous mixing and improved adhesion, while minimizing dust and environmental impact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If water-based chalk paints are used for storage preservation with antimicrobial additives, then mold growth and biodegradation are prevented, but skin irritation and allergic reactions occur

Engineering Contradiction:

Improveprotection against mold growthVSAvoidskin irritation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent removes harmful antimicrobial additives (isothiazolinones) from the paint formulation while maintaining protection against mold growth through alternative means, specifically extracting the harmful component while preserving the protective function

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent converts the potentially harmful effect of high alkaline pH (which causes skin irritation) into a beneficial property by using it to dissolve tannins from wood, thereby protecting the coating from discoloration while maintaining skin safety through controlled pH levels

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Object-generated harmful factors

If redispersible powder paints are used for mineral substrates, then environmental friendliness is improved, but laborious mixing process and dust generation occur

Engineering Contradiction:

Improveenvironmental impactVSAvoidmixing process

Core Design Contradiction:

Object-generated harmful factorsVSEase of operation

Solution Approach 1:

The patent segments the powder paint into tablet form, which dissolves rapidly in water without requiring mechanical mixing equipment, thereby simplifying the application process while maintaining the environmental benefits of powder-based formulations

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent replaces mechanical mixing systems (mixers, drills) with a simple dissolution process where the tablet form naturally disperses in water, eliminating the need for complex mechanical mixing equipment and reducing dust generation

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Strength

If water-based powder paints are applied to wooden substrates, then adhesion is improved, but discoloration of the wood coating occurs

Engineering Contradiction:

ImproveadhesionVSAvoiddiscoloration

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent performs preliminary action by dissolving tannins from the wood before the coating is applied, using a controlled pH environment to extract and remove the discoloring agents in advance, thereby preventing discoloration while maintaining adhesion

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary substance (controlled pH environment) that facilitates the dissolution of tannins and prevents their interaction with the coating, thereby mediating between the adhesion requirement and the discoloration prevention goal

Inventive Principle:

Principle #24Intermediary (Mediator)

4Productivity

If spherical tablet shape is used for powder coatings, then dissolution speed and homogeneity are improved, but manufacturing complexity increases

Engineering Contradiction:

Improvedissolution speedVSAvoidtablet forming process

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies spheroidality by forming the powder coating into spherical tablets, which provide maximum surface area for rapid dissolution and uniform distribution in water, thereby improving productivity while the spherical geometry simplifies the tablet forming process compared to other shapes

Inventive Principle:

Principle #14Spheroidality (Curvature)

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 tablet-shaped powder coatings simplify application, reduce dust and skin contact risks, provide uniform coating quality, and are suitable for wooden substrates with enhanced adhesion and durability, making them safer and more environmentally friendly.

Implementation Method 1

dissolve quickly and easily in water without agitators

Methodology Applied

Scientific EffectDiffusion: Diffusion

Implementation Method 2

homogeneous mixing

Methodology Applied

Scientific EffectDispersion: Dispersion (of waves)

Implementation Method 3

improved adhesion

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentEP4678701A1Powder paints in solid dosage form

Publication Date: 2026.01.14 LIGNOCOLOR GMBH

AI summary

Proposed are powder coating colors in solid dosage form, obtainable or obtained by (i) providing a water-soluble or water-dispersible color powder, (ii) grinding the color powder to a particle size corresponding to a d50 value of 5 to 100 µm, and (iii) tableting the powder from step (ii) and optionally (iv) coating the tablets from step (iii) with an aqueous and water-soluble coating.