Bio-resin Paint Composition for Chemical Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current eco-friendly paint compositions using bio-resins face challenges in achieving durable physical properties such as chemical resistance, adhesion, sun-cream resistance, and fragrance resistance, while also increasing biocarbon content, particularly due to the limitations of starch-based resins and polyurethane resins synthesized from biomass.
Innovation Solution
A paint composition incorporating a bio-resin with a biocarbon content of 90 wt % or more, combined with an acrylic resin and additives, which includes specific weight percentages of bio-resin, acrylic resin, solvent, and additives to enhance coating film properties and biocarbon content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the content of bio-resin in the paint is increased to reduce carbon dioxide emissions, then the eco-friendliness is improved, but the chemical resistance of the coating film is weakened
Solution Approach 1:
The patent uses a composite resin system combining bio-resin (polyester type) with conventional resin (polyurethane type) to achieve both high biocarbon content (90% or more) and excellent chemical resistance. The composite formulation allows the bio-resin to provide eco-friendliness while the conventional resin component maintains protective performance against chemicals.
Solution Approach 2:
The patent optimizes the molecular weight and hydroxyl value parameters of the bio-resin component. Specifically, it uses polyester-type bio-resin with a weight average molecular weight of 500-2000 g/mol and a hydroxyl value of 20-50 mg KOH/g, which balances the biocarbon content with the formation of a cross-linked network structure that provides chemical resistance.
2Quantity of substance
If starch-based resin is used as a bio-resin component, then the biocarbon content is increased, but the water resistance of the coating film is reduced due to remaining carboxyl groups
Solution Approach 1:
The patent extracts and eliminates the problematic carboxyl groups from the bio-resin structure by selecting polyester-type bio-resins that have undergone proper processing to remove or neutralize hydrophilic carboxyl groups, thereby preventing water resistance issues while maintaining high biocarbon content.
Solution Approach 2:
The patent specifies precise parameter ranges for the polyester-type bio-resin, including a hydroxyl value of 20-50 mg KOH/g and weight average molecular weight of 500-2000 g/mol, which ensures the resin has sufficient reactivity for cross-linking while maintaining hydrophobicity and water resistance.
3Quantity of substance
If polyurethane resin synthesized from rapeseed oil is used, then the biocarbon content is increased, but the paintability and physical properties required for automobile parts cannot be achieved
Solution Approach 1:
The patent creates a composite paint composition that combines polyester-type bio-resin with polyurethane-type conventional resin in specific proportions (bio-resin 5-15 wt%, conventional resin 20-40 wt%). This composite approach allows the bio-resin to contribute biocarbon content while the conventional resin ensures proper paintability, flow, and physical properties for automobile applications.
Solution Approach 2:
The patent optimizes the viscosity and molecular weight parameters of the resin components to achieve proper paintability. The polyester-type bio-resin is formulated with specific molecular weight (500-2000 g/mol) and hydroxyl value (20-50 mg KOH/g) to ensure appropriate flow characteristics, drying behavior, and film formation properties.
Data Source
AI summary
A paint composition contains bio-resin, which is eco-friendly and has improved chemical resistance that can impart excellent coating film physical properties, such as, adhesion, sun-cream resistance, chemical agent resistance, and fragrance resistance, by applying a bio-resin to the paint. The paint composition includes a bio-resin and an acrylic resin, and the bio-resin has a biocarbon content of 90 wt % or more as measured by ASTM D6866.