Plasticizer Composition for Low-Temperature PVC Plastisol 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 combined with dialkyl terephthalic acid esters, where the alkyl groups have 8 or 9 carbon atoms, along with optional epoxidized oils or fatty acid esters, to improve 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 dialkyl terephthalic acid esters (high boiling point plasticizers with 8 or 9 carbon atoms in alkyl groups) to create a synergistic plasticizer composition. This merging resolves the contradiction by maintaining the rapid gelling effect while the high boiling point co-plasticizer reduces evaporation losses during processing.
Solution Approach 2:
The invention creates a composite plasticizer system consisting of two distinct chemical components with complementary properties. The trimethyl ester provides rapid gelling action while the dialkyl terephthalic acid ester provides thermal stability and reduced evaporation, together forming a composite material that overcomes the limitations of using either component alone.
2Speed
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
Solution Approach 1:
The patent merges trimethyl ester of 1,2,4-cyclohexanetripropionic acid with dialkyl terephthalic acid esters in specific proportions (where the rapid gelling agent comprises 10-80 wt% and the dialkyl terephthalic acid ester comprises 20-90 wt%). This combination maintains the rapid gelling effect while the dialkyl terephthalic acid ester moderates the viscosity, achieving a balanced composition suitable for plastisol applications.
3Loss of substance
If dialkyl terephthalic acid esters with 8 or 9 carbon atoms are used, then evaporation is minimized, but gelling temperature remains high
Solution Approach 1:
The patent combines dialkyl terephthalic acid esters (which minimize evaporation due to high boiling points) with trimethyl ester of 1,2,4-cyclohexanetripropionic acid (which provides rapid gelling at lower temperatures). This merging allows the composition to achieve both low evaporation losses and reduced gelling temperature through synergistic interaction between the two plasticizer types.
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 reduces gelling temperature and minimizes plasticizer evaporation, resulting in improved thermal stability and mechanical properties of PVC-based plastisols.
Implementation Method 1
The composition reduces gelling temperature
Implementation Method 2
minimizes plasticizer evaporation, resulting in improved thermal stability
Data Source
AI summary
The present invention relates to a plasticizer composition comprising a compound of formula (1) and at least one dialkyl terephthalic acid ester, wherein the two alkyl groups in the dialkyl terephthalic acid ester each have 8 or 9 carbon atoms.