Low Chloride Paint Detackifier Using Cationized Starch
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Solution Overview
Problem
Current detackifiers face challenges in effectively reducing the stickiness of paint overspray in spray booths, managing foam generation, and controlling chloride accumulation, especially with the rise of waterborne paints and environmental regulations limiting VOCs and chlorides.
Innovation Solution
A composition comprising cationized starch and sodium aluminate, with a chloride concentration less than 30,000 ppm, is used to detackify paint overspray in recirculating water systems, improving scrubbing efficiency and reducing foam, while maintaining low chloride levels to prevent environmental harm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional detackifiers are used to reduce paint stickiness, then paint overspray is effectively detackified, but chloride accumulation increases causing corrosion concerns
Solution Approach 1:
The invention changes the chemical composition parameters of detackifiers by using cationized starch and sodium aluminate instead of traditional chloride-containing compounds. This substitution maintains effective paint detackification while reducing chloride levels to less than 30,000 ppm, thereby preventing corrosion in paint sludge systems without sacrificing detackification performance
Solution Approach 2:
The invention employs a composite detackifier system combining cationized starch and sodium aluminate. This composite approach creates a synergistic effect where the cationized starch provides detackification capabilities while sodium aluminate enhances paint particle collection, together achieving effective paint removal without chloride accumulation that would cause corrosion
2Object-affected harmful factors
If waterborne paints are used to reduce VOCs, then environmental compliance is improved, but foam generation increases and paint separation becomes more difficult
Solution Approach 1:
The invention adjusts the chemical parameters of the detackification system by incorporating cationized starch with specific charge characteristics. This modification enables effective interaction with waterborne paint particles, improving separation efficiency while the sodium aluminate component controls foam generation through its aluminate ion content, thus handling waterborne paints effectively without excessive foam
Solution Approach 2:
The cationized starch acts as an intermediary substance that facilitates the interaction between the detackification system and waterborne paint particles. Its cationic charge allows it to bridge the negatively charged paint particles, enhancing coagulation and separation efficiency, while sodium aluminate serves as another intermediary that controls foam stability and promotes paint-water separation in waterborne paint systems
3Productivity
If recirculating water systems are used to scrub paint overspray, then paint collection efficiency is improved, but paint buildup on surfaces increases reducing air and water flow
Solution Approach 1:
The invention applies detackifier composition to the recirculating water before it contacts paint overspray. This preliminary action modifies the water's surface properties and chemical characteristics, enabling it to prevent paint adhesion to surfaces while maintaining effective paint particle collection. The pre-treated water creates a non-stick surface that prevents paint buildup, ensuring continuous air and water flow without blockages
Solution Approach 2:
The detackifier composition consisting of cationized starch and sodium aluminate acts as an intermediary layer between the recirculating water and paint particles. This intermediary prevents direct adhesion of paint to water system surfaces while facilitating paint particle aggregation and removal, thus maintaining optimal air and water flow through the system while preserving high paint collection efficiency
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 detackifies and separates paint overspray, reducing operational costs and environmental impact by minimizing chloride accumulation and foam generation, and demonstrating superior performance in corrosion studies compared to traditional detackification chemicals.
Implementation Method 1
a cationized starch and a solution of sodium aluminate... improve the scrubbing efficiency of the booth, prevent the paint from adhering to booth surfaces, and aid in the collection and removal of paint solids from the recirculating water stream
Implementation Method 2
The water and scrubbed paint particles are carried to a sump basin where the paint particles are separated from the water
Implementation Method 3
a moving stream of air generated by booth exhaust fans pulls the paint overspray through a curtain or spray of recirculating water effectively scrubbing the paint particles from the air into a water or aqueous phase
Implementation Method 4
These materials, while not as tacky as solvent based materials, are much more difficult to separate from water and due to their surfactant load are much more prone towards generating significant amounts of foam
Data Source
AI summary
The present disclosure provides a low chloride paint detackifier composition. Also disclosed are methods of making the paint detackifier composition and methods of using the paint detackifier composition. The detakifier may be made from cationized starch and sodium aluminate. The starch can be wheat starch, corn starch, tapioca starch, potato starch, rice starch, sweet potato starch, sago starch, mung bean starch, arrowroot starch, and any combination thereof.