Tricyclodecane Dimethanol Composition for Coating Solubility
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Solution Overview
Problem
Tricyclodecane dimethanol compositions used in polyester resin production for coatings face challenges with crystallization and solvent resistance, requiring a method to control C11-12 diol compound content for improved solubility and chemical resistance.
Innovation Solution
A tricyclodecane dimethanol composition with controlled C11-12 diol compound content, prepared through a hydroformylation and hydrogenation process using a rhodium-containing catalyst and organophosphorus compound, achieving a balance of solubility and solvent resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If TCDDM is prepared by conventional hydroformylation and hydrogenation, then the production process is simple, but the resulting polyester resin has poor solubility in organic solvents and water
Solution Approach 1:
The invention changes the compositional parameters of TCDDM by controlling the content of specific isomers (3,8- and 3,9-isomers at 60-80 mol%) and limiting C11-12 diol compounds (4-20 wt%). This compositional parameter adjustment improves the solubility of polyester resin in organic solvents and water while maintaining the conventional hydroformylation and hydrogenation process
Solution Approach 2:
The invention creates a composite composition of TCDDM containing multiple isomers (3,8-isomer, 3,9-isomer, and other isomers) in specific ratios, along with controlled amounts of C11-12 diol compounds. This composite structure at the molecular level enhances the overall solubility performance of the polyester resin
2Ease of manufacture
If TCDDM is prepared by conventional hydroformylation and hydrogenation, then the production process is simple, but the coating film shows poor solvent resistance and corrosion resistance
Solution Approach 1:
The invention adjusts the compositional parameters of TCDDM by controlling isomer distribution (3,8- and 3,9-isomers at 60-80 mol%) and C11-12 diol compound content (4-20 wt%). These parameter changes result in polyester resins that form coating films with excellent solvent resistance and corrosion resistance while keeping the production process simple
Solution Approach 2:
The invention utilizes C11-12 diol compounds, which are typically considered impurities or by-products of the hydroformylation process, and converts them into beneficial components. By controlling their content at 4-20 wt%, these compounds contribute to the solvent resistance and corrosion resistance of the coating film without requiring additional purification steps or expensive raw materials
3Manufacturing precision
If the content of C11-12 diol compounds is reduced to improve purity, then the polyester resin purity increases, but the solubility in organic solvents and water decreases
Solution Approach 1:
The invention inverts the conventional approach by setting the C11-12 diol compound content to 4-20 wt% rather than minimizing it. Combined with specific isomer distribution (3,8- and 3,9-isomers at 60-80 mol%), this parameter change simultaneously achieves high purity polyester resin and excellent solubility in organic solvents and water
4Reliability
If the isomer composition of TCDDM is optimized to improve coating performance, then the solvent resistance improves, but the production complexity increases
Solution Approach 1:
The invention optimizes the isomer composition parameters (3,8- and 3,9-isomers at 60-80 mol%, with other isomers at 20-40 mol%) through control of hydroformylation and hydrogenation conditions. This parameter optimization achieves excellent solvent resistance in coating films while maintaining a relatively simple production process without requiring additional complex steps
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 enhances the solubility of polyester resins in organic solvents and water, while maintaining excellent solvent and corrosion resistance, making it suitable for coating metal substrates without compromising curing rate or strength.
Implementation Method 1
performing a hydroformylation reaction by introducing a catalyst composition including a rhodium-containing catalyst compound and an organophosphorus compound into a reactor, and by adding dropwise dicyclopentadiene under a mixed gas of hydrogen and carbon monoxide
Implementation Method 2
performing a hydrogenation reaction of tricyclodecane dialdehyde obtained by the hydroformylation reaction in the presence of a hydrogenation catalyst
Data Source
AI summary
Provided are a tricyclodecane dimethanol composition which may be suitably used in preparing a polyester resin exhibiting excellent solvent resistance and chemical resistance when forming a coating film and having excellent solubility in organic solvents or water, and a preparation method thereof.