2-Ethylhexyl Methyl Terephthalate Plasticizer for Adhesive Flow and Stability
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Solution Overview
Problem
Adhesives and sealants based on polyurethanes, polyureas, polyacrylates, polysulfides, and their derivatives face challenges in optimizing flow properties and mechanical stability, which affects their processing ease and performance in applications such as civil engineering and shipbuilding.
Innovation Solution
Incorporating 2-ethylhexyl methyl terephthalate at a concentration of 0.32 to 40% by weight into the formulations of these polymers to enhance flow properties and mechanical stability, allowing for easier processing and improved smoothing results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional plasticizers are used in adhesives and sealants, then the formulation can achieve adequate flow properties, but the processing ease and smoothing results are impaired
Solution Approach 1:
The patent applies parameter changes by selecting plasticizers with specific molecular structures and properties (low vapor pressure, appropriate boiling point range, specific chemical composition) to optimize both processing ease and stability. The invention identifies and utilizes plasticizers that meet precise parameter criteria to resolve the contradiction between ease of operation and reliability.
2Ease of operation
If plasticizers are added to reduce yield point and improve flow, then processing becomes easier, but tensile strength and mechanical properties deteriorate
Solution Approach 1:
The patent applies local quality by selecting plasticizers with specific localized molecular characteristics that provide flow improvement in the processing state while maintaining strength in the cured state. The invention identifies plasticizers whose molecular structure provides different functional effects at different stages of the adhesive/sealant lifecycle.
Solution Approach 2:
The patent applies composite materials by formulating combinations of different plasticizers (e.g., phthalates, adipates, sebacates, trimellitates, terephthalates) to achieve synergistic effects where the composite plasticizer system provides both improved flow properties and maintained tensile strength that individual plasticizers cannot achieve alone.
3Stability of the object's composition
If high elongation is achieved through plasticizer selection, then low-temperature elasticity improves, but film extensibility and smoothing capability are compromised
Solution Approach 1:
The patent applies dynamics by selecting plasticizers that provide time-dependent and state-dependent properties, where the plasticizer formulation adapts its behavior between processing (requiring smoothability) and service conditions (requiring elasticity). The invention identifies plasticizers whose properties dynamically respond to temperature, stress, and time variations.
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 addition of 2-ethylhexyl methyl terephthalate results in adhesives and sealants with improved flow properties and consistent tensile strength, making them easier to process and apply while maintaining optimal mechanical properties.
Implementation Method 1
Due to their dissolving and swelling properties, they reduce the hardness of the polymer
Implementation Method 2
Due to their dissolving and swelling properties, they reduce the hardness of the polymer
Implementation Method 3
increase the low-temperature elasticity
Implementation Method 4
plasticizers in adhesives and sealants also serve to increase the extensibility of the film produced
Data Source
AI summary
The invention relates to an adhesive or sealant comprising: (A) at least one compound selected from the group of polyurethanes, polyureas, polyacrylates, polysulfides, silylated polyurethanes, silylated polyureas, silylated polyethers, silylated polysulfides and silyl-terminated acrylates; and (B) at least 0.32 wt.-% 2-ethylhexyl-methyl-terephthalate, in relation to the total amount of adhesive or sealant. The invention also relates to a method for producing the adhesive and sealant and to the use thereof for adhesively bonding joined parts.