Halogen-Resistant Water-Soluble Film Composition
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Solution Overview
Problem
Conventional water-soluble films used for packaging reactive halogenated chemicals, such as chlorinated and brominated water treatment products, suffer from compatibility issues, including discoloration and loss of solubility when exposed to these chemicals, leading to impaired solubility characteristics and potential insolubility in cold water.
Innovation Solution
A halogen-resistant film-forming composition comprising an acid-stable, water-soluble polyvinyl alcohol polymer, an oxidizable organic material, a chelating agent, and a free radical scavenger, which maintains solubility in cold water even after prolonged exposure to reactive halogenated compounds by incorporating specific functional groups and concentrations of these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional water-soluble films are used for packaging reactive halogenated chemicals, then the packaging is convenient and allows direct incorporation into water treatment processes, but the films undergo discoloration and loss of solubility after contact with chlorinated and brominated chemicals
Solution Approach 1:
The patent applies composite materials by combining multiple protective agents (oxidizable organic material, chelating agent, and free radical scavenger) with the polyvinyl alcohol polymer to create a composite film formulation that resists halogen degradation while maintaining water solubility and structural integrity
Solution Approach 2:
The patent applies preliminary action by incorporating protective agents into the film formulation before packaging the chemicals, allowing the film to preemptively resist oxidation and degradation from halogen exposure, thereby preventing discoloration and solubility loss before they occur
2Adaptability or versatility
If water-soluble films are exposed to reactive halogenated compounds, then the packaging serves its purpose, but the films become soluble in hot water only or altogether insoluble in water
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of the film through the addition of specific protective agents (oxidizable organic material, chelating agent, free radical scavenger) that alter the film's resistance parameters to halogen oxidation, thereby maintaining solubility characteristics under varying chemical exposure 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 composition ensures that the film remains water-soluble in cold water, with minimal increase in disintegration and dissolution times, even after storage with reactive halogenated compositions under varying climatic conditions, thereby retaining its functional integrity and solubility characteristics.
Implementation Method 1
an oxidizable organic material selected from the group consisting of polyethylene glycol, methoxypolyethylene glycol, polypropylene glycol, any reducing sugars such as glucose, fructose, maltose and glyceraldehyde
Implementation Method 2
a chelating agent selected from the group consisting of phosphonic acids, phosphonates, polyphosphates, polyaminocarboxylic acids
Implementation Method 3
a free radical scavenger selected from the group consisting of 4-methoxy phenol, hydroquinone, ascorbic acid, butylated hydroxyanisole, mercaptopropionic acid, N-acetylcysteine, dimethylthiourea, pyrrolidine dithiocarbamate, hydroxylamines, monoterpene ketones
Data Source
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Figure 2
AI summary
A water-soluble, halogen-resistant film-forming composition useful for packaging water treatment products is disclosed. The film can include an acid-stable, water-soluble polyvinyl alcohol polymer, an oxidizable organic material, a chelating agent, a free radical scavenger, and secondary additives such as plasticizers, lubricants, and surfactants. The resulting film has favorable solubility properties after having been exposed to halogenated (e.g., chlorinated and brominated) compositions such as water treatment and agricultural products for prolonged periods of time.