Formaldehyde-Free Amino Resin Coating Composition
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Solution Overview
Problem
Conventional amino resins containing formaldehyde lead to the production of impurities, slowing down drying, deteriorating hardness, gloss, and color stability of coating layers, limiting their application and quality.
Innovation Solution
An amino resin composition with specific 13C-NMR spectrum characteristics, formulated without formaldehyde, which accelerates drying and enhances hardness, gloss, and color stability of varnishes and coating layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If formaldehyde is used as raw material to produce amino resin, then the resin can be formed by condensation polymerization, but impurities are produced that slow down drying and deteriorate coating quality
Solution Approach 1:
The patent extracts and eliminates formaldehyde from the raw materials used to produce amino resin. By replacing formaldehyde with alternative aldehydes (such as acetaldehyde, propionaldehyde, or butyraldehyde), the invention removes the source of harmful impurities while maintaining the essential condensation polymerization process that forms the amino resin structure.
Solution Approach 2:
The patent changes the chemical parameters of the raw materials by substituting formaldehyde with other aldehydes having different molecular structures and properties. This parameter change alters the polymerization process and the resulting resin composition, producing amino resin without the harmful impurities associated with formaldehyde while maintaining desirable coating properties.
2Object-affected harmful factors
If glyoxal is used to substitute formaldehyde to produce amino resin without free formaldehyde, then health safety is improved, but impurities are still produced that slow down drying and deteriorate coating properties
Solution Approach 1:
The patent extracts glyoxal from the list of acceptable raw materials and replaces it with monovalent aldehydes such as acetaldehyde, propionaldehyde, or butyraldehyde. This extraction eliminates the specific impurity formation associated with glyoxal while maintaining the goal of producing amino resin without free formaldehyde.
Solution Approach 2:
The patent uses alternative aldehydes that copy the essential functional properties of glyoxal (ability to undergo condensation polymerization with amino compounds) while lacking the harmful impurity-forming characteristics. These substitute aldehydes perform the same chemical function without producing the detrimental side effects.
3Ease of manufacture
If conventional amino resin is used, then the varnish can be formulated, but the drying speed is slow and the coating layer has poor hardness, gloss and color stability
Solution Approach 1:
The patent changes the molecular structure parameters of the amino resin by using monovalent aldehydes with different chain lengths (C1-C6 alkyl groups) instead of formaldehyde or glyoxal. This structural modification alters the polymerization kinetics and the physical properties of the resulting coating, achieving faster drying speeds and improved hardness, gloss, and color stability.
4Ease of manufacture
If conventional amino resin is used, then the varnish can be formulated, but the coating layer has poor hardness, gloss and color stability
Solution Approach 1:
The patent modifies the chemical composition parameters of the amino resin by incorporating aldehydes with longer alkyl chains (propionaldehyde, butyraldehyde, etc.). These structural changes in the resin molecules lead to improved color stability in the coating layer, preventing yellowing and degradation over time while maintaining ease of manufacture.
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 amino resin composition improves production efficiency, appearance, durability, and industrial value of amino resin products by ensuring rapid drying, high hardness, high gloss, and good color stability, expanding their application fields.
Implementation Method 1
Amino resin is a resin formed by condensation polymerization of amino compounds, aldehyde compounds, and alcohol compounds
Implementation Method 2
its main function is to crosslink the polymer material into a three-dimensional network structure via chemical reaction
Data Source
AI summary
Provided are an amino resin composition, a varnish, a coating layer, and a product. The amino resin composition comprises a repeating unit represented by the following Formula (I):A 13C-NMR spectrum of the amino resin composition has a first characteristic peak at 159 ppm to 161 ppm and a second characteristic peak at 70 ppm to 80 ppm. Based on the integral value of the first characteristic peak as 1, the integral value of the second characteristic peak is in the range from 0.01 to 0.25. Adopting the amino resin composition can accelerate the drying of the varnish and ensure the coating layer and the product have high hardness, high gloss and excellent color stability.