Vinyl-Functionalized Structured Plastic for Direct Radiation-Curing Paint
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Solution Overview
Problem
Existing materials with amino groups, particularly aminoplast resins, face challenges in achieving direct paintability with radiation-curing paints while maintaining their structured surface, leading to the need for additional primer coats that obscure the underlying structure and suffer from high gloss, susceptibility to soiling, and artificial feel.
Innovation Solution
Functionalizing the structured surface of amino-containing plastics with vinyl groups through a covalent grafting process, allowing direct application of radiation-curing paints without a primer layer, thereby preserving the surface structure and reducing paint thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a primer coat or undercoat is applied to improve adhesion of radiation-curing paints to amino-containing plastics, then adhesion is improved, but the surface structure is lost and the paint layer becomes too thick
Solution Approach 1:
The invention changes the chemical parameters of the amino-containing plastic surface by introducing reactive functional groups (epoxy, carboxyl, or isocyanate groups) through treatment with specific chemicals. This modification enables direct adhesion of radiation-curing paints without requiring a primer coat, thus preserving the surface structure while improving adhesion.
Solution Approach 2:
The invention uses reactive functional groups (epoxy, carboxyl, or isocyanate groups) as intermediaries between the amino-containing plastic surface and the radiation-curing paint. These intermediary groups create chemical bonds that ensure strong adhesion without requiring a separate primer layer.
2Reliability
If multiple primer and paint layers are applied to achieve desired surface properties, then adhesion and surface properties are improved, but the underlying structure is lost
Solution Approach 1:
The invention modifies the chemical parameters of the substrate surface to enable direct painting, eliminating the need for multiple primer and paint layers. This single-layer approach preserves the underlying surface structure while achieving the desired adhesion and surface properties.
Solution Approach 2:
The invention performs preliminary chemical treatment of the amino-containing plastic surface to introduce reactive functional groups before painting. This preliminary action ensures that the subsequent single paint layer adheres properly without requiring multiple layers, thus preserving the surface structure.
3Ease of manufacture
If the surface is left as high-gloss aminoplast resin, then manufacturing is simple, but the surface is susceptible to soiling and has an artificial feel
Solution Approach 1:
The invention changes the surface energy parameters of the aminoplast resin by introducing reactive functional groups through chemical treatment. This modification enables the surface to be painted with a single layer that provides anti-soiling properties and a more natural feel, while the manufacturing process remains relatively simple.
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
Enables structured surfaces to be painted directly with radiation-curing paints, reducing the need for additional layers, maintaining the original structure, and improving adhesion, while also addressing issues of gloss and artificial feel.
Implementation Method 1
at least some of the amino groups on the structured surface of the plastic containing amino groups have been covalently functionalized with vinyl groups by grafting a functionalizing reagent
Implementation Method 2
covalently functionalized with vinyl groups by grafting a functionalizing reagent, wherein the functionalizing reagent has at least one vinyl group and at least one group reactive towards the amino groups
Implementation Method 3
The painted material has a structured paint surface, obtainable by: (b) applying a layer of a vinyl group-mediated radiation-curing paint to the vinyl group-modified, structured plastic surface; (c) radiation curing the paint layer
Data Source
Figure 1
Figure 2a~2c
Figure 3a~3d
AI summary
The invention relates to a paintable material (1) with a structured surface made of an amino group-containing plastic (2, 3), wherein at least some of the amino groups on the structured surface have been covalently functionalized with vinyl groups by grafting on a functionalization reagent. Painted materials with structured painted surfaces can be obtained from this paintable material, and these materials, as well as their manufacturing processes, are the subject of the invention. The invention further relates to the use of a vinyl functionalization as a replacement for a primer layer or undercoat in the painting of structured surfaces made of amino group-containing plastic with radiation-curing paints.