Coating Composition for Marking Substrates with High Color Intensity
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Solution Overview
Problem
Existing coating compositions for marking substrates are limited in producing colored images of high intensity and durability, particularly in terms of water resistance and abrasion resistance, and cannot be easily modulated to achieve transparent or opaque coatings.
Innovation Solution
A coating composition comprising a color former, an amine salt of an organic metal compound, a binder, and a solvent, where the amine salt is of a specific formula allowing for modulation between transparent and opaque coatings, and includes optional components for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional coating compositions (e.g., WO 02/074548) are used, then black images can be produced, but the images lack color intensity and transparency control
Solution Approach 1:
The invention changes the chemical parameters of the coating composition by introducing amine salts of organic metal compounds with specific formulas (Formula I or II) and controlling their content (0.1-10% by weight). This parameter change enables the coating to produce colored images with high intensity while maintaining ease of manufacture through controlled chemical composition.
Solution Approach 2:
The invention creates a composite coating system combining color former (0.1-5% by weight), amine salt of organic metal compound (0.1-10% by weight), binder (1-80% by weight), and solvent (10-90% by weight). This composite material approach allows simultaneous achievement of color intensity, transparency control, and manufacturing ease through synergistic component interactions.
2Ease of manufacture
If conventional coating compositions are used, then coatings can be applied, but they lack water resistance and abrasion resistance
Solution Approach 1:
The invention employs a composite formulation where the amine salt of organic metal compound (Formula I or II) acts as a durability-enhancing component. The specific chemical structure with silicon or boron centers and organic ligands provides both ease of coating application and superior water resistance and abrasion resistance when the coating is developed.
Solution Approach 2:
The invention optimizes the concentration parameters of key components: color former (0.1-5%), amine salt (0.1-10%), binder (1-80%), and solvent (10-90%). This parameter optimization ensures the coating achieves adequate durability (water resistance and abrasion resistance) while remaining easy to apply and process.
3Ease of manufacture
If conventional coating compositions are used, then coatings can be formed, but they cannot be modulated for transparent or opaque appearances
Solution Approach 1:
The invention introduces dynamic control over coating appearance by adjusting the relative proportions of color former (0.1-5%), amine salt (0.1-10%), and binder (1-80%). This dynamic formulation approach allows the same base composition to be modulated for either transparent or opaque coatings depending on the specific application requirements.
Solution Approach 2:
The invention utilizes parameter changes in composition ratios to control optical properties. By varying the concentration of color former relative to binder and amine salt, the coating can be tuned to achieve desired transparency or opacity levels while maintaining ease of manufacture and consistent coating formation.
4Illumination intensity
If higher concentrations of color former are used, then color intensity improves, but coating durability and water resistance deteriorate
Solution Approach 1:
The invention optimizes the color former concentration parameter to a specific range (0.1-5% by weight) rather than using higher concentrations. This optimized parameter level achieves sufficient color intensity while preserving water resistance and coating durability, avoiding the trade-off that would occur with excessive color former content.
Solution Approach 2:
The invention uses a composite system where color former (0.1-5%), amine salt (0.1-10%), and binder (1-80%) work synergistically. This composite approach allows the color former to provide intensity at lower concentrations while the amine salt and binder components maintain water resistance and durability, eliminating the need to sacrifice durability for color intensity.
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 yields colored images of excellent intensity and high durability, with improved water resistance and abrasion resistance, and can be modulated to achieve either transparent or opaque coatings, while maintaining image quality and background whiteness.
Implementation Method 1
coating the packaging with a composition comprising a colour former and a colour developer, which upon treatment with energy such as heat reacts to form a visible colour
Implementation Method 2
a binder, which is typically polymeric
Implementation Method 3
a solvent such as water or ethanol
Implementation Method 4
upon treatment with energy such as heat reacts to form a visible colour
Data Source
AI summary
The present invention provides coating compositions for marking substrates, which comprises a color former, an amine salt of an organic metal compound, a binder, a solvent, and optionally additional components, wherein the amine salt of the organic metal compound is of formula (I) in which X is silicon or boron, and E and F are the same or different and are selected from the group consisting of a, b, c, d, e, f, g, h in which R6 and R7 are the same or different are hydrogen, C1-4-alkyl, C1-4-alkoxy, halogen, amino or carboxy, and for X=silicon o=1 and p=0, and R1 is aryl, aralkyl or C1-4-alkyl, or o=1 and p=1, and R1 and R2 together form a one residue selected from the group consisting of a, b, c, d, e, f, g and h, and for X=boron o=0 and p=0, and R3, R4 and R5 are the same or different and are hydrogen, C1-12-alkyl, C1-6-hydroxyalkyl, allyl, aralkyl or arylsulfonyl, in which aralkyl or arylsulfonyl can be substituted with C1-4-alkyl, or R3 and R4 together with the nitrogen to which they are attached form a morpholino or piperidino ring. The present invention also provides a process for the preparation of the composition of the present invention, substrates coated with these compositions, a process for preparing coated substrates, a process for preparing a marked substrate using these compositions, a marked substrate obtainable by the latter process and amine salts of the organic metal compounds of formula I.