Radon Blocking Composition Using EVA and Radiation Crosslinking

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Solution Overview

Problem

Conventional radon blocking compositions for buildings are not effective in maintaining a long-term radon blocking effect and are difficult to apply to gaps and crevices, and they often use chemical adhesives that can be harmful to the environment and human health.

Innovation Solution

A composition comprising ethylene vinyl acetate (EVA), one or more polymer resins such as polyurethane (PU) or silicone resin, and anionic surfactants, optionally with inorganic fillers like zeolite, applied as a paste and irradiated with radiation to enhance radon blocking and antibacterial properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional coating compositions are applied to building surfaces, then radon blocking effect is achieved, but the coating film is easily damaged and the radon blocking effect cannot be maintained for a long time

Engineering Contradiction:

Improveradon blocking effect maintenanceVSAvoidcoating film durability

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent changes the physical state of the composition from liquid coating to paste form with optimized viscosity parameters, and applies radiation treatment to alter the molecular structure of the polymer, thereby improving both the durability of the applied material and the long-term maintenance of radon blocking effect

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite materials consisting of polymer resin base polymers combined with specific additives and undergoes radiation-induced crosslinking to create a more durable and stable structure that maintains radon blocking performance over time

Inventive Principle:

Principle #40Composite materials

2Adaptability or versatility

If conventional coating methods are used, then radon blocking is achieved, but it is difficult to apply to gaps, cracks, and crevices in buildings

Engineering Contradiction:

Improveapplicability to building gaps and cracksVSAvoidapplication difficulty

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent optimizes the viscosity parameter of the composition by adjusting polymer molecular weight and adding specific additives, transforming it into a paste form that can be easily applied to irregular surfaces, gaps, and cracks while maintaining effective radon blocking

Inventive Principle:

Principle #35Parameter changes

3Strength

If synthetic resin adhesives such as chloroprene, polyvinyl acetate, and polyacrylic acid ester are used to improve adhesion, then adhesion performance is enhanced, but volatile monomers are retained after painting and toxic gases are generated in the event of a fire

Engineering Contradiction:

ImproveadhesionVSAvoidtoxic gas emission and volatile monomers

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The patent changes the chemical composition parameters by using radiation-curable polymer systems instead of conventional synthetic resin adhesives, eliminating volatile monomers and toxic gas generation while maintaining or improving adhesion through radiation-induced crosslinking

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent converts the potential harm of using strong adhesives into a benefit by using radiation crosslinking to create strong adhesion without the harmful byproducts, transforming a potentially harmful chemical bonding approach into a safe physical crosslinking process

Inventive Principle:

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

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 composition effectively shields radon, maintains durability and thermal stability, and is eco-friendly, allowing for easy application to cracks and crevices, thereby creating a safe indoor environment while extending the lifespan of building materials.

Implementation Method 1

a radon shielding construction for painting a wall of a building with a material capable of shielding radon

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 2

radon blocking paste-related technologies, which have a wide range of applications, such as applying to reduce radon entering through cracks or crevices in buildings

Methodology Applied

Scientific EffectDiffusion barrier: Diffusion Barrier

Data Source

PatentUS20230058648A1Composition for blocking radon and method for preparing the same

Publication Date: 2023.02.23 KOREA ATOMIC ENERGY RES INST

AI summary

Provided are a composition for blocking radon and a method for preparing the same, and more particularly, to a composition for blocking radon including ethylene vinyl acetate (EVA); one or more polymer resins selected from the group consisting of polyurethane (PU) and silicone resin; and anionic surfactants, and a method for preparing a composition for blocking radon including irradiating radiation to the composition for blocking radon.