Trisamide Polyolefin Additives for Low Haze and Reduced Extraction
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Solution Overview
Problem
Existing trisamide compounds fail to achieve low haze levels in polyolefin polymers comparable to more transparent polymers like polystyrene and acrylic resins, and exhibit undesirable extraction from the polymer, limiting their use in applications requiring minimal additive extraction, such as food contact and medical devices.
Innovation Solution
Development of trisamide derivatives formally derived from 3,5-diaminobenzoic acid, specifically compounds of Formula (I) with alkyl groups as R1, R2, and R3, which are used in polymer compositions to reduce haze and minimize extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If existing trisamide compounds are used as clarifying agents in polyolefin polymers, then haze levels are reduced to some extent, but the haze levels cannot reach the transparency of more transparent polymers like polystyrene and acrylic resins
Solution Approach 1:
The patent modifies the molecular structure of trisamide compounds by changing parameters such as introducing specific substituents (e.g., cyclohexyl groups, aryl groups) and adjusting the core structure (e.g., using 3,5-diaminobenzoic acid derivatives). These structural parameter changes enable the clarifying agent to achieve haze levels comparable to transparent polymers while maintaining effectiveness in polyolefin systems.
2Illumination intensity
If existing trisamide compounds are used to reduce haze in polypropylene, then haze levels improve, but the compounds exhibit undesirable extraction from the polymer
Solution Approach 1:
The patent changes the chemical parameters of the trisamide compounds by introducing specific molecular structures (e.g., Formula I with particular substituent patterns) that enhance polymer-additive interaction. This modifies the extraction behavior, reducing the tendency of the clarifying agent to leach out from the polymer matrix while maintaining its haze-reducing function.
Solution Approach 2:
The patent develops composite molecular structures combining specific functional groups within the trisamide framework (e.g., amide groups, carbonyl groups, and various substituents) to create a synergistic effect that simultaneously achieves low haze and reduced extraction, effectively creating a multi-functional additive system.
3Illumination intensity
If clarifying agents are added to polyolefin polymers to reduce haze, then transparency improves, but the additives may be extracted in food contact and medical applications
Solution Approach 1:
The patent modifies the chemical parameters of the clarifying agent to include specific functional groups and molecular structures (e.g., Formula I with particular R1, R2, R3 groups) that enhance binding to the polymer matrix. This parameter change reduces extraction into food or medical environments while preserving the transparency benefit.
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 trisamide derivatives achieve low haze levels comparable to transparent polymers and exhibit significantly reduced extraction, making them suitable for applications requiring low haze and minimal additive extraction, such as food contact and medical devices.
Implementation Method 1
nucleate the crystallization of the cooling polymer and reduce spherulite size
Implementation Method 2
the spherulites will scatter visible light passing through the polymer
Data Source
AI summary
A trisamide compound has the structure of Formula (I)in which R1, R2, and R3 are independently selected from the group consisting of alkyl groups. A polymer composition comprises a trisamide compound of Formula (I) and a polyolefin polymer. The polymer compositions containing a trisamide compound of Formula (I) exhibit very low haze levels and minimal extraction of the trisamide compound.