Polyolefin-Modified Acrylic Resin for Aqueous Coating Adhesion
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Solution Overview
Problem
Chlorinated polyolefin-based resins used in coating materials for motor vehicle components face issues with adhesion, oil resistance, and environmental concerns due to organic solvent and chlorine compound usage, leading to coating film damage and ozone layer depletion.
Innovation Solution
A resin composition for aqueous coating materials comprising a propylene-butene resin component and/or propylene-ethylene-butene resin component combined with a (meth)acrylic resin component, where the mass ratio is between 15:85 to 75:25, using polyolefin-modified (meth)acrylic resin particles obtained by swelling propylene-ethylene-butene resin particles with a monomer raw material liquid and subsequent polymerization, including metal (meth)acrylate and bifunctional polymerizable monomers for enhanced cross-linking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If chlorinated polyolefin-based resin is used as coating material binder, then adhesion to polyolefin-based resins is enhanced, but environmental contamination and ozone layer damage occur due to chlorine compounds
Solution Approach 1:
The invention extracts and removes the harmful chlorine compound component from the coating material binder while retaining the essential adhesion function. This is achieved by replacing chlorinated polyolefin-based resin with a combination of propylene-butene resin and (meth)acrylic resin, thereby eliminating ozone layer damage and environmental contamination while maintaining binding performance.
Solution Approach 2:
The invention uses a composite resin system combining propylene-butene resin (or propylene-ethylene-butene resin) with (meth)acrylic resin to achieve the adhesion properties previously provided by chlorinated polyolefin. The synergistic combination of these two resin types provides both excellent adhesion to polyolefin substrates and environmental compatibility without chlorine compounds.
2Ease of manufacture
If organic solvents are used in coating materials, then dissolution of chlorinated polyolefin resin is achieved, but environmental contamination and health issues arise
Solution Approach 1:
The invention removes organic solvents from the coating material formulation by using an aqueous dispersion system. The (meth)acrylic resin component is provided as water-based dispersion or emulsion, eliminating the need for toluene, xylene, or other organic solvents while maintaining proper resin dissolution and coating film formation through water evaporation.
Solution Approach 2:
The invention changes the solvent parameter from organic-based to water-based system. By formulating the coating material as an aqueous dispersion containing the resin composition, the patent transforms the chemical nature of the liquid medium, enabling environmentally friendly application while maintaining coating performance.
3Strength
If coating film is exposed to oil-containing substances, then adhesion is initially good, but damage and peeling occur over time
Solution Approach 1:
The composite resin system of propylene-butene resin and (meth)acrylic resin provides both initial adhesion and long-term oil resistance. The propylene-butene component ensures strong bonding to polyolefin substrates, while the (meth)acrylic component contributes chemical resistance and durability against oil-containing substances like cosmetics and foodstuffs, preventing peeling and damage.
Solution Approach 2:
The coating film exhibits different functional zones at the molecular level: the propylene-butene resin portion provides adhesion functionality at the substrate interface, while the (meth)acrylic resin portion provides chemical resistance functionality at the film surface exposed to oil-containing substances, creating localized functional properties throughout the coating.
4Object-generated harmful factors
If aqueous dispersion is used instead of organic solvent, then environmental friendliness is improved, but adhesion and oil resistance deteriorate
Solution Approach 1:
The aqueous dispersion contains a carefully designed composite resin system where propylene-butene resin (or propylene-ethylene-butene resin) provides adhesion to polyolefin substrates, while (meth)acrylic resin provides chemical resistance. This composite approach in aqueous formulation achieves both environmental friendliness and performance requirements simultaneously.
Solution Approach 2:
The invention changes the resin composition parameters to work effectively in aqueous medium. By selecting specific resin types and optimizing their ratios (propylene-butene resin 10-70 parts, (meth)acrylic resin 30-90 parts by mass), the formulation achieves proper adhesion and durability properties in water-based system that previously only worked in organic solvents.
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 solution provides an aqueous coating material with excellent adhesion to polyolefin-based resins, resistance to gasoline, cosmetic products, and foodstuffs, while avoiding organic solvents and chlorine compounds, resulting in a durable and environmentally friendly coating film.
Implementation Method 1
polymerizing a monomer raw material liquid containing at least a (meth)acrylic monomer, and/or polyolefin-modified (meth)acrylic resin particles (B-2) obtained by swelling propylene-ethylene-butene resin particles with the above monomer raw material liquid
Implementation Method 2
polymerizing the polymerizable monomer
Data Source
AI summary
A resin composition for an aqueous coating material that includes a propylene-butene resin component and/or propylene-ethylene-butene resin component (A), and a (meth)acrylic resin component (B), wherein the mass ratio between the propylene-butene resin component and/or propylene-ethylene-butene resin component (A) and the (meth)acrylic resin component (B) is within a range from 15:85 to 75:25. Also disclosed are a method for producing such a resin composition and an aqueous coating material. The present invention is able to provide a resin composition for an aqueous coating material that is useful as a binder within an aqueous coating material that uses no organic solvents or chlorine compounds, and yet exhibits excellent adhesion to polyolefin-based resins and is capable of forming a coating film that is resistant to discoloration and exhibits favorable resistance to the oils contained within gasoline, cosmetic products and foodstuffs and the like, and is also able to provide a method for producing the resin composition and an aqueous coating material that uses the resin composition.