Amide Nucleating Agents for Polymer Clarity and Thermal Stability
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Solution Overview
Problem
Current crystalline synthetic resin compositions face challenges in achieving low haze and high clarity, as well as improved thermal stability, which are essential for various applications but are not adequately addressed by existing nucleating agents.
Innovation Solution
A composition comprising a natural or synthetic polymer combined with specific amides, such as those of the formulas (I), (II), or (III), which act as nucleating agents, particularly haze-reducing agents, to enhance crystallizability, clarity, and thermal stability by incorporating compounds like 1,3,5-tris[cyclohexylcarbonylamino]benzene or N-t-butyl-3,5-bis-(3-methylbutyrylamino)-benzamide, thereby reducing haze and increasing crystallization temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional nucleating agents are used in crystalline synthetic resin compositions, then crystallization can be promoted, but haze reduction and clarity improvement are insufficient
Solution Approach 1:
The patent changes the chemical structure parameters of nucleating agents by introducing specific amide compounds with particular molecular configurations (formulas I, II, III with defined R1-R6 groups). These structural parameter changes enable the nucleating agent to simultaneously promote crystallization and reduce haze, resolving the contradiction between ease of manufacture and harmful optical effects.
Solution Approach 2:
The patent creates a composite nucleating system by combining specific amide compounds with crystalline synthetic resins. This composite material approach allows the amide nucleating agent to work synergistically with the resin matrix, achieving both effective crystallization promotion and haze reduction that neither component could achieve alone.
2Temperature
If existing nucleating agents are employed, then crystallization temperature can be increased, but thermal stability improvement is inadequate
Solution Approach 1:
The patent modifies the thermal parameters of the polymer system by introducing amide nucleating agents with specific molecular weights and functional groups. These parameter changes result in both elevated crystallization temperature and improved thermal stability, as the amide compounds interact with polymer chains to create more thermally stable crystalline structures.
3Ease of manufacture
If traditional additives are used, then processing can be simplified, but clarity and transmittance remain poor
Solution Approach 1:
The patent employs small molecular weight amide compounds that serve as effective nucleating agents at very low concentrations (0.01-5 wt%). These small molecules diffuse easily during processing, providing nucleation functionality without complicating the manufacturing process, while simultaneously improving optical clarity and transmittance through controlled crystallization.
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 exhibits excellent crystallizability, high transmittance, low haze, and improved thermal stability, with haze values below 62% and increased crystallization temperature, making it suitable for applications requiring clear and thermally stable synthetic polymers.
Implementation Method 1
one or more compounds of the formula (I), (II) or (III)... act as nucleating agents... increasing crystallization temperature
Implementation Method 2
haze reducing agents... high transmittance, low haze... increased crystallization temperature
Data Source
AI summary
A composition containing a) a natural or synthetic polymer and b) one or more compounds of the formula (I), (II) or (III) wherein R1, R2 and R3 or Y1, Y2 and Y3 or Z1, Z2 and Z3 are e.g. branched C3-C20alkyl.