Cyclohexane Polycarboxylic Acid Esters in Coil Coating
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Solution Overview
Problem
Current coil coating processes face limitations in increasing belt speeds and achieving coatings with superior mechanical, chemical, and physical properties, particularly cold-elastic properties, thermal stability, and UV resistance, while maintaining economic efficiency and ease of processing.
Innovation Solution
The use of 1,2-cyclohexanedicarboxylic acid diisononyl ester in a coil coating process with a combination of paste PVC and extender PVC, along with additives, to create a flowable coating material that is thermally post-treated, enhancing the coating's properties and processing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If benzene polycarboxylic acid esters (phthalates) are used as plasticizers for PVC in coil coating processes, then the coating materials can be processed, but the belt speeds are limited to at least 100 m/min and the cold-elastic properties are insufficient
Solution Approach 1:
The patent changes the chemical structure parameter of the plasticizer from benzene polycarboxylic acid esters to cyclohexane polycarboxylic acid esters. This structural modification results in lower density and viscosity, enabling belt speeds significantly above 100 m/min while improving cold flexibility and cold-elastic properties of the PVC coating material.
Solution Approach 2:
The patent uses a composite plasticizer system combining cyclohexane polycarboxylic acid esters with other additives in the coating formulation. This composite approach achieves both high processing speed and superior mechanical properties including cold-elasticity, resolving the contradiction between speed and reliability.
2Reliability
If benzene polycarboxylic acid esters are used as plasticizers, then the coating can be applied, but the UV resistance and weather resistance are insufficient compared to cyclohexane polycarboxylic acid esters
Solution Approach 1:
The patent modifies the chemical structure from aromatic (benzene) to aliphatic (cyclohexane) plasticizers. This change inherently provides superior UV resistance and weather resistance while the cyclohexane structure maintains excellent processing behavior with lower viscosity and density, achieving both durability and ease of manufacture.
3Productivity
If conventional PVC coating materials are used, then the coating can be produced, but the production speed and economic efficiency are limited
Solution Approach 1:
The patent changes the plasticizer molecular structure to cyclohexane polycarboxylic acid esters, which have significantly lower viscosity and density. This parameter change reduces the overall viscosity of the coating material, enabling faster application and curing processes, thereby increasing production speed and economic 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
This approach significantly increases belt speeds, matches or exceeds the properties of phthalic diester-based coatings, and provides improved weather resistance and ease of processing, enabling the production of complex three-dimensional molded parts for various indoor and outdoor applications.
Implementation Method 1
the thermal aftertreatment, in particular the thermal hardening or gelling, of the applied layer takes place at higher temperatures, for example at 140 to 260 ° C
Implementation Method 2
the thermal aftertreatment, in particular the thermal hardening or gelling, of the applied layer takes place
Data Source
AI summary
The invention relates to the use of cyclohexane polycarbonic acid esters for the production of coating materials for the coil coating method containing at least one paste PVC and at least one extender PVC, and the production of coated coils; a coil coating method which is carried out by utilizing cyclohexane polycarbonic acid esters and coating materials containing at least one paste PVC and at least one extender PVC; coils coated on one or two sides having at least one coating containing at least one cyclohexane polycarbonic acid ester, at least one paste PVC, and at least one extender PVC; and three-dimensional mold parts which can be produced by the deformation of said coated coils.