Composite Plasticizer Composition for Vinyl Chloride Resins

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Solution Overview

Problem

Conventional plasticizers, such as di(2-ethylhexyl)terephthalate, face challenges in achieving optimal physical properties like plasticization efficiency, migration resistance, and economic feasibility, particularly in vinyl chloride-based resins, due to issues like poor thermal stability and high production costs.

Innovation Solution

A plasticizer composition combining 1,4-cyclohexane diester-based materials with citrate-based materials at specific weight ratios, optionally including an epoxidized material, to enhance tensile strength, elongation rate, and thermal stability while reducing production costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If di(2-ethylhexyl)terephthalate is used as a plasticizer, then production cost is reduced and it is widely available, but migration resistance and stress migration resistance deteriorate

Engineering Contradiction:

Improveproduction costVSAvoidmigration resistance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent combines di(2-ethylhexyl)terephthalate with hydrogenated di(2-ethylhexyl)terephthalate in a composite plasticizer system. This composite approach allows the cheaper non-hydrogenated component to reduce costs while the hydrogenated component provides improved migration resistance, achieving both economic feasibility and performance requirements.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent modifies the chemical structure of di(2-ethylhexyl)terephthalate through hydrogenation to create hydrogenated di(2-ethylhexyl)terephthalate. This parameter change (hydrogenation degree) improves migration resistance while maintaining compatibility with the base plasticizer, resolving the contradiction between cost and performance.

Inventive Principle:

Principle #35Parameter changes

2Strength

If hydrogenated di(2-ethylhexyl)terephthalate is used to improve plasticization efficiency, then mechanical properties are improved, but production cost increases and thermal stability deteriorates

Engineering Contradiction:

Improveplasticization efficiencyVSAvoidproduction cost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

Instead of using 100% hydrogenated di(2-ethylhexyl)terephthalate which would maximize plasticization efficiency but also maximize cost, the patent applies partial action by using a blend where only a portion of the plasticizer is hydrogenated. This achieves sufficient plasticization efficiency improvement while controlling production costs.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The patent optimizes the hydrogenation degree parameter of di(2-ethylhexyl)terephthalate to achieve the desired balance between plasticization efficiency and production cost, rather than using full hydrogenation which would be excessively costly.

Inventive Principle:

Principle #35Parameter changes

3Strength

If hydrogenated di(2-ethylhexyl)terephthalate is used to improve plasticization efficiency, then mechanical properties are improved, but thermal stability deteriorates

Engineering Contradiction:

Improveplasticization efficiencyVSAvoidthermal stability

Core Design Contradiction:

StrengthVSStability of the object's composition

Solution Approach 1:

The patent optimizes the hydrogenation degree parameter to achieve the desired balance between plasticization efficiency and thermal stability, rather than using full hydrogenation which would compromise thermal stability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite plasticizer system combining hydrogenated and non-hydrogenated components, where the non-hydrogenated portion maintains thermal stability while the hydrogenated portion provides improved plasticization efficiency.

Inventive Principle:

Principle #40Composite materials

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 improves mechanical and thermal properties, including migration resistance and volatility, while maintaining economic feasibility, making it suitable for environmentally friendly resin applications.

Implementation Method 1

a plasticizer composition, comprising: one kind of cyclohexane 1,4-diester-based material; and a citrate-based material, wherein a weight ratio of the cyclohexane 1,4-diester-based material and the citrate-based material is from 99:1 to 1:99

Methodology Applied

Scientific EffectMolecular mixing:

Data Source

PatentEP3293225B1Plasticizer composition, and resin composition comprising same

Publication Date: 2023.12.27 LG CHEM LTD

Figure 1

AI summary

Provided are a plasticizer composition, a resin composition and a method of preparing the same. Particularly, a plasticizer capable of improving physical properties such as plasticization efficiency, migration, tensile strength, elongation rate, stress migration and light fastness, which are required for sheet formulations, when used as a plasticizer for the resin composition by improving poor physical properties generated due to a structural limitation thereof, and a resin composition including the same are provided.