Cyclohexane Triester Plasticizer Composition for Resin
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Solution Overview
Problem
Conventional plasticizer compositions, such as phthalate-based and terephthalate-based, face challenges in achieving a balance between absorption rate, mechanical properties, stress resistance, migration, and plasticization efficiency, while also requiring additional materials to compensate for inferior physical properties and high costs.
Innovation Solution
A cyclohexane triester-based plasticizer composition is developed, using an isomer mixture of hexyl alcohol with a degree of branching of 2.0 or less, including alkyl groups from 1-hexanol, 2-methylpentanol, 3-methylpentanol, and cyclopentyl methanol, to enhance absorption rate, mechanical properties, and light resistance, and improve the balance between migration and loss properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If di(2-ethylhexyl) terephthalate (DEHTP) is used as a plasticizer, then cost is reduced and it is widely available, but absorption rate is slow, migration and stress migration are poor
Solution Approach 1:
The patent changes the chemical structure parameters of the plasticizer by using cyclohexane triester with specific alkyl groups (where the sum of carbon numbers is 18-24) instead of conventional DEHTP. This structural parameter change improves absorption rate and reduces migration while maintaining cost-effectiveness through efficient synthesis from cyclohexane tricarboxylic acid and alcohol.
2Reliability
If trimellitate-based products (tri(2-ethylhexyl) trimellitate or triisononyl trimellitate) are used to improve migration and loss properties, then migration and loss properties are improved, but plasticization efficiency is degraded and unit price is high
Solution Approach 1:
The patent optimizes the parameter balance by using cyclohexane triester with controlled alkyl group carbon numbers (18-24) and specific branching degrees. This parameter optimization achieves both improved migration resistance and maintained plasticization efficiency, avoiding the trade-off present in trimellitate-based products.
Solution Approach 2:
The patent creates a composite molecular structure combining cyclohexane tricarboxylic acid core with specific alkyl groups, achieving synergistic effects that simultaneously improve migration resistance and plasticization efficiency, unlike single-component trimellitate esters.
3Strength
If conventional plasticizer compositions are used, then mechanical properties can be maintained, but light resistance is poor and additional materials are required to compensate for inferior physical properties
Solution Approach 1:
The patent extracts and eliminates the problematic aromatic ring structure from conventional plasticizers, using saturated cyclohexane triester instead. This removal of the aromatic component inherently improves light resistance while maintaining mechanical properties through the plasticizer's molecular structure.
Solution Approach 2:
The patent converts the potential disadvantage of using a different ester structure into a benefit by demonstrating that cyclohexane triester naturally provides both good mechanical properties and superior light resistance, eliminating the need for additional stabilizers.
4Reliability
If a second plasticizer is mixed to compensate for defects, then physical properties may be improved in specific cases, but the change of physical properties is hard to predict, unit cost increases, and compatibility problems may arise
Solution Approach 1:
The patent creates a universal plasticizer composition that simultaneously provides absorption rate, migration resistance, plasticization efficiency, and light resistance in a single compound, eliminating the need for multiple plasticizer mixtures and their associated complexity.
Data Source
AI summary
The present invention relates to a plasticizer composition characterized in having alkyl groups derived from an isomer mixture of hexyl alcohol with the degree of branching of less than 2.0 as a cyclohexane triester. If the plasticizer composition is applied to a resin, stress resistance and mechanical properties may be maintained to equal or better levels, migration and loss properties and plasticization efficiency may keep balance, and light resistance and heat resistance may be markedly improved.