Pregelatinized Starch Primer for Substrates
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Solution Overview
Problem
Conventional primers based on aqueous polymer dispersions consume natural resources and produce microplastics, posing ecological concerns and requiring more environmentally friendly alternatives with comparable or superior properties.
Innovation Solution
A process using pregelatinized starch as a primer for substrates, which improves adhesion and reduces substrate absorbency by applying an aqueous primer comprising one or more pregelatinized starches before coating, avoiding microplastics and utilizing renewable resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional primers based on aqueous polymer dispersions are used, then adhesion promotion and reduced absorbency are achieved, but ecological harm increases due to microplastic production and natural resource consumption
Solution Approach 1:
The patent changes the chemical composition parameter of the primer from synthetic polymer dispersions to pregelatinized starch, a natural renewable resource. This substitution maintains the primer's functional properties (adhesion promotion, absorbency control) while eliminating microplastic formation and reducing ecological harm, directly resolving the contradiction between performance and environmental compatibility
Solution Approach 2:
The patent uses pregelatinized starch as a composite material that combines the benefits of natural renewability with effective primer functionality. The starch-based composition provides adhesion promotion and absorbency control comparable to synthetic polymers while being biodegradable and microplastic-free, thus resolving the environmental performance contradiction
2Reliability
If conventional primers based on aqueous polymer dispersions are used, then adhesion promotion and reduced absorbency are achieved, but ecological harm increases due to natural resource consumption
Solution Approach 1:
The patent changes the material source parameter from non-renewable synthetic polymers to renewable starch-based materials. This parameter change maintains the primer's adhesion promotion capability while substituting a renewable resource, thereby reducing natural resource consumption and resolving the contradiction between functional performance and resource sustainability
Solution Approach 2:
The patent employs starch, a biodegradable natural material, as a disposable primer component that performs its function and then decomposes naturally. This approach replaces persistent synthetic polymers with a biodegradable alternative that consumes renewable resources, addressing both the adhesion requirement and the natural resource consumption concern
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 pregelatinized starch primer demonstrates comparable or superior adhesion promotion and reduced absorbency, offering a cost-effective, environmentally friendly solution for coating substrates without generating microplastics, as shown in adhesion tests and processing time evaluations.
Implementation Method 1
The requirements to be satisfied by a primer are manifold, such as penetration into porous substrates, dust binding and consolidation of unstable surfaces, setting of a defined absorbency
Implementation Method 2
promotion of adhesion between substrate and coatings to be applied subsequently
Data Source
AI summary
The invention relates to a process for coating a substrate including the steps of (i) applying a primer on the substrate; (ii) applying a coating on the primed substrate; and (iii) drying and/or hardening the applied coating; wherein the primer is an aqueous primer comprising one or more pregelatinized starches.