Recycling Degraded Emulsion Paint via Parameter Adjustment
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Solution Overview
Problem
Existing methods for recycling paint are inefficient in processing degraded paint, leading to high wastage and disposal costs, as they cannot handle paint with low pH, high viscosity, or foreign objects, limiting the percentage of waste paint that can be reused.
Innovation Solution
A method involving pH adjustment, viscosity modification, and addition of odour-reducing materials like clay or talc to restore degraded paint properties, allowing for the recycling of water-based emulsion paints by testing and adjusting specific gravity, solids content, and opacity to produce paint with similar properties to non-degraded paint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rudimentary filtering methods are used to process waste paint, then processing time is reduced, but the ability to handle degraded paint is insufficient
Solution Approach 1:
The patent applies parameter changes by systematically adjusting multiple paint properties including pH level, viscosity, and composition ratios. The method transforms degraded paint into usable paint by modifying these parameters through controlled chemical and physical processes, enabling the processing of paint that would otherwise be unsuitable for recycling
Solution Approach 2:
The patent introduces intermediary substances and processes between the degraded paint and the final product. These intermediaries facilitate the transformation by bridging the gap between the degraded state and the usable state, allowing complex degradation issues to be addressed through sequential intermediate treatment steps
2Manufacturing precision
If careful sorting is performed to identify usable paint, then paint quality is improved, but processing time increases
Solution Approach 1:
Instead of relying on time-consuming manual sorting, the patent transforms the quality assessment approach by changing physical and chemical parameters of the paint. Through systematic adjustment of pH, viscosity, and composition, the method converts even degraded paint into usable product, eliminating the need for extensive preliminary sorting while maintaining high quality standards
3Manufacturing precision
If degraded paint is discarded to maintain quality standards, then paint quality is preserved, but waste increases
Solution Approach 1:
The patent converts the harmful effects of paint degradation into beneficial outcomes. By treating degraded paint through pH adjustment, viscosity modification, and compositional changes, the method transforms what would be waste material into usable paint product, thereby converting the harm of degradation into the benefit of extended paint lifecycle and reduced waste
Solution Approach 2:
The patent systematically changes multiple parameters of degraded paint including pH level, viscosity, and composition ratios. Through these controlled parameter modifications, the method restores degraded paint to usable quality standards, thereby preventing waste while maintaining paint quality requirements
4Ease of operation
If paint properties are adjusted to meet standards, then paint usability is improved, but processing complexity increases
Solution Approach 1:
The patent employs systematic parameter changes across multiple dimensions including pH level, viscosity, and composition ratios. By coordinating these parameter adjustments through an integrated method, the patent achieves usable paint quality while managing processing complexity through a structured approach to modifications
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
Enables the recycling of a higher proportion of waste paint, producing usable paint with consistent quality from degraded sources, reducing landfill waste and environmental impact.
Implementation Method 1
adding an odour-reducing material selected from clay, and/or talc in an amount of from 0.5 - 30% w/w
Data Source
AI summary
Paint is recycled in a method comprising the steps of: (a) providing a paint precursor, comprising degraded paint; and (b) treating the paint precursor by: testing the pH of the paint precursor and, if necessary, adjusting the pH to lie within a predetermined range; and testing one or more of the following properties of the paint precursor and, if necessary, adjusting the property or properties to lie with a predetermined range: (i) specific gravity; (ii) solids content; (iii) viscosity; and (iv) opacity, whereby at least one of the pH, specific gravity, solids content, viscosity, and opacity of the paint precursor is adjusted, thereby producing useable paint, recycled from degraded paint.