Cyclohexane Dicarboxylate Mixed Ester Plasticizers for Low Volatility
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Solution Overview
Problem
Current non-phthalate plasticizers, such as bis(2-ethylhexyl) terephthalate (DOTP), do not provide adequate fusion capability and viscosity performance in polymer plasticizer systems, and are more volatile than aromatic counterparts.
Innovation Solution
A novel mixed cyclohexane dicarboxylate ester (MCHDE) composition comprising specific weight percentages of compounds of formula I, II, and III, which enhance fusion capability and reduce volatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DOTP is used as a non-phthalate plasticizer, then it provides reasonable plasticizer performance, but it does not have acceptable fusion capability and is more volatile than aromatic counterparts
Solution Approach 1:
The patent changes the chemical structure parameters of the plasticizer by using cyclohexane dicarboxylate esters instead of aromatic esters, and by controlling the alkyl chain lengths (C1-C6) and their distribution. This structural parameter change reduces volatility while improving fusion capability, as the cyclic aliphatic structure provides better thermal stability and fusion characteristics compared to aromatic structures.
Solution Approach 2:
The patent employs a composite plasticizer composition containing multiple cyclohexane dicarboxylate ester compounds with different alkyl chain configurations (Formula I, II, and III compounds). This composite approach combines the advantages of different molecular structures to achieve both low volatility and excellent fusion capability, overcoming the limitations of single-component plasticizers like DOTP.
2Stability of the object's composition
If DOTP is used as a non-phthalate plasticizer, then it is available as a general purpose plasticizer, but it does not have acceptable viscosity performance in polymer plasticizer systems
Solution Approach 1:
The patent optimizes the viscosity performance by carefully selecting and combining cyclohexane dicarboxylate ester compounds with specific alkyl chain lengths (C1-C6). The distribution of different chain lengths and the cyclic structure provide optimal viscosity characteristics that maintain stability in polymer plasticizer systems, improving upon DOTP's viscosity performance while maintaining compatibility with existing production processes.
3Reliability
If cyclohexane dicarboxylate esters are used to improve fusion capability, then fusion performance is enhanced, but the composition complexity increases
Solution Approach 1:
The patent uses a composite of three types of cyclohexane dicarboxylate ester compounds (Formula I, II, and III) with specific weight percentage ranges. This composite structure achieves enhanced fusion capability by combining different molecular configurations, while the defined composition ranges prevent excessive complexity by providing clear formulation guidelines for manufacturing.
Data Source
AI summary
The present application discloses novel cyclohexane dicarboxylate mixed esters of formula I: wherein R1, R2, and n are defined herein. The mixed esters are useful as plasticizers. The application also discloses resin compositions comprising the cyclohexane dicarboxylate mixed esters of formula I.