repellent
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Solution Overview
Problem
Existing repellents do not effectively impart oil resistance to substrates, and existing literature does not address the importance of particle size on oil resistance or exclude fluorine compounds.
Innovation Solution
A water-dispersible repellent comprising a modified polyol and a dispersant, with a controlled particle size distribution and absence of fluorine compounds, which imparts oil resistance and liquid repellency to substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorine compounds are used to impart oil resistance, then oil resistance performance is improved, but environmental safety and regulatory compliance deteriorate
Solution Approach 1:
The patent extracts and removes fluorine compounds from the repellent formulation, replacing them with non-fluorine alternatives. This eliminates the harmful environmental factors associated with fluorine compounds while maintaining the oil resistance performance through alternative mechanisms using the modified polyol and dispersant system.
Solution Approach 2:
The patent changes the chemical composition parameters by substituting fluorine-containing compounds with non-fluorine compounds. This parameter change allows the formulation to achieve oil resistance through different chemical mechanisms, specifically using the modified polyol structure and dispersant combination, thereby resolving the contradiction between performance and environmental safety.
2Reliability
If particle size is not controlled in the repellent, then manufacturing complexity is reduced, but liquid repellency and coverage performance deteriorate
Solution Approach 1:
The patent performs preliminary action by pre-controlling the particle size distribution during the manufacturing process. The repellent is formulated with predetermined particle size characteristics, ensuring optimal liquid repellency and coverage performance before application. This preliminary control of particle size prevents performance deterioration while maintaining reasonable manufacturing complexity.
3Reliability
If existing repellent formulations are used, then manufacturing simplicity is maintained, but oil resistance effectiveness deteriorates
Solution Approach 1:
The patent employs composite materials by combining modified polyol with specific dispersants to create a new repellent formulation. This composite approach achieves effective oil resistance that neither component could provide alone, resolving the contradiction between oil resistance effectiveness and formulation complexity by creating a synergistic material system.
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 repellent provides excellent oil resistance and liquid repellency to substrates without using fluorine compounds, with controlled particle sizes enhancing coverage and performance.
Implementation Method 1
A water-dispersible repellent comprising a modified body of polyol and at least one dispersant
Implementation Method 2
with a volume abundance ratio of particles with a size of 100 μm or larger of 25% or less as measured by laser diffraction scattering
Implementation Method 3
imparts liquid repellency (water repellency, oil repellency, oil resistance, and/or water resistance) to various substrates
Data Source
AI summary
A water dispersible repellent containing a modified form of a polyol and at least one kind of dispersant selected from the group consisting of a nonionic dispersant, a cationic dispersant, an amphoteric dispersant, and an inorganic dispersant, wherein the volume abundance ratio of particles having a size of 100 μm or more, as measured by laser diffraction scattering, is 25% or less, the repellent being capable of imparting oil resistance to a base material (for example, fiber or paper).