Water-Soluble Coating for Oxidizing Chemical Stability
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Solution Overview
Problem
Oxidizing chemical agents used for cleaning and disinfecting tend to degrade over time, posing challenges in packaging due to their reactivity with water-soluble coatings and films, which often disintegrate or discolor when exposed.
Innovation Solution
A water-soluble coating or film is developed using a polyvinyl alcohol polymer combined with a neutralizing agent, such as a base or reaction product, to protect oxidizing chemicals like trichloroisocyanuric acid from degradation, while maintaining solubility and preventing adverse interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water soluble coating or film is used to package oxidizing chemicals, then the chemical agent is protected and handling is facilitated, but the coating or film degrades and discolors when contacted with the oxidizing chemicals
Solution Approach 1:
A coating composition comprising a water-soluble polymer and a neutralizing agent is applied to the oxidizing chemical. The neutralizing agent acts as an intermediary that reacts with the oxidizing chemical to form a reaction product, preventing direct contact between the oxidizing chemical and the polymer coating, thereby preventing degradation and discoloration while maintaining water solubility.
Solution Approach 2:
The coating composition changes the chemical parameters by incorporating a neutralizing agent that alters the pH or chemical reactivity environment. This parameter change prevents the oxidizing chemical from attacking the polymer, resolving the contradiction between protection and degradation.
2Ease of operation
If the oxidizing chemical is supplied as a solid in granular or compressed form, then handling is facilitated, but the chemical degrades over time
Solution Approach 1:
The neutralizing agent is incorporated into the coating composition before application to the oxidizing chemical. This preliminary action ensures that the neutralizing agent is already in place to prevent degradation when the coating is applied, addressing both handling convenience and chemical stability simultaneously.
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 solution effectively prevents degradation and discoloration of the coating or film when in contact with oxidizing chemicals, ensuring the chemical agent remains stable until use and maintaining desired water solubility properties.
Implementation Method 1
a neutralizing agent is placed in contact with the outer surface of the substrate... the neutralizing agent may comprise a reaction product of a base with the oxidizing chemical
Data Source
AI summary
A chemical delivery product for delivering an oxidizing chemical into an aqueous system is disclosed. For instance, in one embodiment, a substrate containing an oxidizing chemical, such as trichloroisocyanuric acid, is coated with a water soluble polymer in order to prevent the oxidizing chemical from degrading prior to use and in order to facilitate handling. In accordance with the present disclosure, a neutralizing agent is contacted with the substrate in order to prevent the substrate from degrading the water soluble coating. In an alternative embodiment, a package is formed from a water soluble film forming composition combined with a base.