Cyclohexane Tripropionic Ester Plasticizer Blend for PVC Plastisol Viscosity
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Solution Overview
Problem
Trimethyl esters of cyclohexane-1,2,4-tripropionic acid exhibit high viscosity and significant evaporation when used as sole plasticizers in PVC-based plastisols, leading to suboptimal performance.
Innovation Solution
A plasticizer composition comprising trimethyl esters of cyclohexane-1,2,4-tripropionic acid combined with trialkyl trimellitates, where the alkyl groups have 4 to 10 carbon atoms, and optionally including epoxidized oils, to improve thermal stability and mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If trimethyl ester of cyclohexane-1,2,4-tripropionic acid is used as the sole plasticizer, then the gelation temperature is reduced, but the viscosity of the plastisol becomes too high
Solution Approach 1:
The patent combines trimethyl ester of cyclohexane-1,2,4-tripropionic acid with trialkyl trimellitate in a plasticizer composition. The trimethyl ester component reduces gelation temperature while the trialkyl trimellitate component maintains appropriate viscosity, creating a synergistic effect that resolves the contradiction between low gelation temperature and manageable viscosity.
2Reliability
If trimethyl ester of cyclohexane-1,2,4-tripropionic acid is used as the sole plasticizer, then the plasticizing action is enhanced, but significant evaporation occurs during processing
Solution Approach 1:
The patent creates a composite plasticizer system combining trimethyl ester of cyclohexane-1,2,4-tripropionic acid with trialkyl trimellitate. The trimethyl ester provides strong plasticizing action while the trialkyl trimellitate has lower volatility, reducing evaporation losses during processing and maintaining better compositional stability.
Data Source
AI summary
A plasticizer composition contains a compound of the formula (1)and at least one trialkyl trimellitate, where the three alkyl groups in the trialkyl trimellitate each have 8 or 9 carbon atoms.