Cyclohexane Ester Plasticizer Blend for Low-Temperature PVC Gelling
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Solution Overview
Problem
Trimethyl esters of 1,2,4-cyclohexanetripropionic acid exhibit high viscosity and significant evaporation during processing when used alone as plasticizers in PVC-based plastisols, leading to suboptimal performance in final products.
Innovation Solution
A plasticizer composition comprising trimethyl esters of 1,2,4-cyclohexanetripropionic acid and 1,2-dialkylcyclohexanedicarboxylic acid esters with 8 or 9 carbon atoms, optionally with epoxidized oils or additional plasticizers, to enhance application-related properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If trimethyl ester of 1,2,4-cyclohexanetripropionic acid is used as the sole plasticizer, then rapid gelling effect is achieved, but viscosity becomes too high and significant evaporation occurs during processing
Solution Approach 1:
The patent combines trimethyl ester of 1,2,4-cyclohexanetripropionic acid (rapid gelling agent) with 1,2-dialkylcyclohexanedicarboxylic acid esters (conventional plasticizers having 8 or 9 carbon atoms) in a blended composition. This merging allows the rapid gelling effect to be achieved while the conventional plasticizer component compensates for evaporation losses and maintains optimal viscosity, thereby resolving the contradiction between fast gelling and substance loss during processing
2Speed
If trimethyl ester of 1,2,4-cyclohexanetripropionic acid is used as the sole plasticizer, then rapid gelling effect is achieved, but final product performance deteriorates
Solution Approach 1:
The patent merges the rapid gelling properties of trimethyl ester with the performance-enhancing characteristics of 1,2-dialkylcyclohexanedicarboxylic acid esters (where alkyl groups have 8 or 9 carbon atoms). This combination ensures both rapid gelling during processing and optimal final product performance, as the conventional plasticizer component contributes to mechanical properties and thermal stability while the rapid gelling agent provides processing speed
3Reliability
If conventional plasticizers are used alone, then good final product performance is achieved, but gelling temperature is too high
Solution Approach 1:
The patent combines conventional 1,2-dialkylcyclohexanedicarboxylic acid esters (which provide good final product performance) with trimethyl ester of 1,2,4-cyclohexanetripropionic acid (which acts as a rapid gelling agent). This blending lowers the gelling temperature of the conventional plasticizer system while maintaining the performance benefits, as the rapid gelling agent accelerates the gelling process at lower temperatures
Data Source
AI summary
The present invention relates to a plasticizer composition comprising a compound of formula (1) and at least one 1,2-dialkylcyclohexanedicarboxylic acid ester, wherein the two alkyl groups in the 1,2-dialkylcyclohexanedicarboxylic acid ester each have 8 or 9 carbon atoms.