Coordination Polymer Crystallites for Thermoplastic Marking
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Solution Overview
Problem
Current marking techniques for thermoplastic or thermosetting polymeric organic matrices are costly, unreliable, and not scalable for mass production, making it economically unfeasible to differentiate and authenticate articles effectively, especially against counterfeiting.
Innovation Solution
Incorporating a dispersion of coordination polymer crystallites based on two to ten photoluminescent rare earths and at least one non-photoluminescent rare earth into the matrix during manufacturing, which are chemically inert and provide a unique spectrophotometric signature detectable under UV irradiation, allowing for differentiation without altering the matrix's properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If holograms or special inks are used for marking, then identification security is improved, but implementation cost increases significantly
Solution Approach 1:
The patent changes the chemical composition parameters by using specific ratios of photoluminescent rare earths (2-10%) combined with non-photoluminescent rare earths (90-98%), creating a cost-effective marking compound that maintains high identification security through unique photoluminescent properties while reducing implementation costs compared to holograms or special inks
Solution Approach 2:
The patent creates a composite marking compound by combining multiple rare earth elements with specific organic ligands (such as benzene-1,3,5-tricarboxylate or terephthalate). This composite approach enables unique photoluminescent signatures for authentication while using inexpensive materials and simple dispersion processes, resolving the contradiction between security and cost
2Ease of manufacture
If simple chemical marking techniques are used, then implementation cost is reduced, but reliability of identification deteriorates due to ease of copying
Solution Approach 1:
The patent applies local quality by creating specific regional variations in the marking compound composition - different ratios of photoluminescent to non-photoluminescent rare earths (2-10% versus 90-98%) and different organic ligand selections create unique photoluminescent signatures for different regions or batches. This enables simple, low-cost marking that is highly reliable for identification because each region's specific composition pattern is difficult to replicate without knowing the exact formulation
Solution Approach 2:
The patent replaces complex mechanical or physical marking systems with a chemical-optical system based on photoluminescence. By substituting simple chemical compounds that emit characteristic light under UV irradiation for complex holographic or mechanical marking systems, the patent achieves both low implementation cost and high identification reliability through unique spectral signatures that are difficult to copy
3Reliability
If marking compounds are added to the matrix, then identification capability is improved, but compatibility problems with the matrix may arise
Solution Approach 1:
The patent creates an inert chemical environment by selecting rare earth elements and stable organic ligands (such as benzene-1,3,5-tricarboxylate or terephthalate) that are chemically inert toward common thermoplastic and thermosetting polymer matrices. This inertness ensures that the marking compound does not react with or degrade the matrix, maintaining matrix compatibility while providing reliable identification capability through photoluminescence
Solution Approach 2:
The patent uses small quantities of marking compound (2-10% concentration) that are effectively 'disposable' in the sense that they serve their identification purpose without needing to be chemically bonded to or permanently integrated with the matrix structure. The compounds are simply dispersed and provide their function through their inherent photoluminescent properties, eliminating compatibility issues while maintaining identification capability
4Adaptability or versatility
If multiple distinct marking compounds are produced, then differentiation capability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies dynamics by creating a flexible, adjustable marking system where the differentiation capability is achieved through variable composition ratios rather than fixed, complex manufacturing processes. By dynamically adjusting the percentage of photoluminescent rare earths (2-10%) versus non-photoluminescent rare earths (90-98%) and selecting from different organic ligands, the system can produce millions of distinct marking compounds using the same simple dispersion manufacturing process, thus improving differentiation capability without increasing manufacturing complexity
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
This method enables the production of millions of distinct crystallites with the same thermal and chemical properties, making counterfeiting nearly impossible, while being cost-effective and scalable, and allows for identification even after long-term use without modifying the material's properties.
Implementation Method 1
incorporate by dispersion during its manufacture or shaping at least one compound based on two to ten photoluminescent rare earths and at least one non-photoluminescent rare earth at a concentration making this compound detectable under UV irradiation
Data Source
Figure 1~2
Figure 3
AI summary
Process for labelling a material based on at least one organic thermoplastic or thermosetting polymer matrix comprising a step that consists in incorporating therein, by dispersion during its manufacture or its formation, at least one compound based on at least one photoluminescent rare earth in a concentration that renders this compound detectable under UV irradiation, said compound being a coordination polymer that is in the form of a crystallite obtained by reaction of at least one photoluminescent rare-earth ion with at least one unsaturated organic ligand.