Exterior coating composition

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Solution Overview

Problem

Current coating compositions are ineffective in inhibiting fungal, algal, and bacterial growth on surfaces, leading to defacement and damage, especially in humid and dark environments, with existing dry film preservatives and immobilized isothiazolin-3-one derivatives not providing significant protection against fungi and algae.

Innovation Solution

A coating composition combining a dry film preservative with an immobilized isothiazolin-3-one derivative/zinc oxide complex, which synergistically inhibits the growth of fungi, algae, and bacteria, offering superior protection on exterior surfaces despite individual ineffectiveness of the components alone.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a dry film preservative is used alone, then fungal and algal growth is partially inhibited, but protection against bacteria is insufficient and overall effectiveness is limited

Engineering Contradiction:

Improveprotection against fungal and algal growthVSAvoidcomprehensive microbial coverage

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent combines a dry film preservative (effective against fungi and algae) with an immobilized isothiazolin-3-one derivative/zinc oxide complex (effective against bacteria) to create a synergistic formulation that provides comprehensive protection against all three microbial types, resolving the limitation of single-component systems

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If an immobilized isothiazolin-3-one derivative/zinc oxide complex is used alone, then bacterial growth is inhibited, but protection against fungi and algae is insufficient

Engineering Contradiction:

Improveprotection against bacterial growthVSAvoidcomprehensive microbial coverage

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent merges the immobilized isothiazolin-3-one derivative/zinc oxide complex (bacterial protection) with a dry film preservative (fungal and algal protection) to achieve broad-spectrum microbial inhibition, overcoming the narrow specificity of the zinc oxide complex alone

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If existing preservatives are used, then some microbial growth is inhibited, but defacement and damage to surfaces occurs over time

Engineering Contradiction:

Improvemicrobial growth inhibitionVSAvoidsurface protection duration

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent employs an immobilized isothiazolin-3-one derivative/zinc oxide complex that provides continuous bacterial protection through slow release and persistent activity, combined with a dry film preservative that maintains fungal and algal inhibition over extended periods, achieving long-lasting comprehensive protection

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The formulation uses a composite approach by combining two different preservative mechanisms (dry film preservative and immobilized isothiazolin-3-one derivative/zinc oxide complex) to create a synergistic system that provides prolonged and enhanced protection against all microbial types

Inventive Principle:

Principle #40Composite materials

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 combination effectively prevents defacement by inhibiting the growth of fungi, algae, and bacteria on surfaces, demonstrating enhanced protection against environmental exposure, even under adverse conditions, with low toxicity and persistence in the coating film.

Implementation Method 1

coating compositions having a dry film preservative and an antibacterial preservative comprising an immobilized isothiazolin-3-one derivative/zinc oxide complex provided synergistic effects that inhibit the growth of fungi, and/or algae and/or bacteria on surfaces

Methodology Applied

Scientific EffectSynergistic inhibition:

Data Source

PatentUS11566140B2Exterior coating composition

Publication Date: 2023.01.31 TROY CORP

AI summary

A coating composition is provided for inhibiting growth of fungus and/or algae on a surface. The coating composition includes a dry film preservative and an antibacterial dry-film preservative comprising an immobilized isothiazolin-3-one derivative/zinc oxide complex. The amount of the antibacterial preservative comprising immobilized 1,2-isothiazolin-3-one derivative/zinc oxide complex and the dry film preservative contained in the coating composition is sufficient to inhibit or prevent the defacement of a surface exposed to the environment, when such defacement is due to growth of fungi or algae, or a combination of fungi and algae on a surface coated with said surface coating composition.