Resin Emulsion Core-Shell Structure for Building Coatings
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Solution Overview
Problem
Existing resin emulsions for coating materials lack comprehensive excellence in weather resistance, freezing flow retention, pattern-retaining property, film forming stability at low temperatures, deformation resistance, adhesion property, and dilution stability, particularly when used in top coats for building surfaces.
Innovation Solution
A resin emulsion with emulsion particles having an inner layer made of a styrene-based polymer and an outer layer made of a (meth)acrylic acid ester polymer, where the styrene-based monomer content is 10-55% and the acid group-containing monomer is 0.1-10% by mass, enhancing the emulsion's properties through specific polymerization processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin emulsion containing emulsion particles with an inner layer of styrene-based polymer and an outer layer of (meth)acrylic acid ester polymer is used, then weather resistance, freezing flow retention, pattern-retaining property, film forming stability at low temperatures, deformation resistance, adhesion property, and dilution stability are comprehensively improved, but the device complexity and manufacturing complexity increase due to the multi-layer structure and specific polymerization process
Solution Approach 1:
The emulsion particles are segmented into an inner layer containing styrene-based polymer and an outer layer containing (meth)acrylic acid ester polymer. This segmentation allows each layer to contribute specific properties: the inner layer provides weather resistance and structural integrity, while the outer layer provides adhesion and flexibility, thereby achieving comprehensive performance improvement without requiring a single complex material
Solution Approach 2:
The invention uses composite emulsion particles combining different polymer types (styrene-based and (meth)acrylic acid ester) in a structured configuration. This composite structure integrates the advantages of each polymer system to achieve superior overall performance across multiple properties including weather resistance, adhesion, and low-temperature film forming stability
2Reliability
If the content of styrene-based monomer is controlled at 10-55% by mass in total monomer components, then the coating material achieves optimal balance of weather resistance and workability, but the productivity and ease of manufacture are reduced due to precise composition control requirements
Solution Approach 1:
The invention specifies a precise range for styrene-based monomer content (10-55% by mass) in the total monomer components. This parameter control optimizes the balance between weather resistance (improved by sufficient styrene content) and workability (maintained by limiting excessive styrene content). The defined range provides a clear manufacturing target that balances performance optimization with production feasibility
3Reliability
If acid group-containing monomer content is controlled at 0.1-10% by mass in total monomer components, then adhesion property and film forming stability are improved, but the manufacturing precision requirements increase
Solution Approach 1:
The invention defines a specific range for acid group-containing monomer content (0.1-10% by mass) to optimize adhesion property and film forming stability. This parameter specification provides clear manufacturing guidelines that balance the need for precise composition control with practical production capabilities, ensuring consistent performance while maintaining manufacturability
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 resin emulsion exhibits improved weather resistance, freezing flow retention, pattern-retaining property, film forming stability at low temperatures, deformation resistance, adhesion property, and dilution stability, making it suitable for top coats on building surfaces.
Implementation Method 1
a resin layer containing a polymer (I) made of a monomer component A containing 80 to 100% by mass of a styrene-based monomer and 0 to 20% by mass of a monomer other than the styrene-based monomer by emulsion polymerization, and a resin layer containing a polymer (II) made of a monomer component B containing 70 to 100% by mass of a (meth)acrylic acid ester and 0 to 30% by mass of a monomer other than the (meth)acrylic acid ester by emulsion polymerization
Data Source
AI summary
A resin emulsion for a coating material, which contains emulsion particles each having an inner layer and an outer layer, and wherein: each emulsion particle has a resin layer containing a polymer (I) that is obtained by emulsion polymerizing a monomer component A containing 80 to 100% by mass of a styrene monomer and 0 to 20% by mass of a monomer other than the styrene monomer and a resin layer containing a polymer (II) that is obtained by emulsion polymerizing a monomer component B containing 70 to 100% by mass of a (meth)acrylic acid ester and 0 to 30% by mass of a monomer other than the (meth)acrylic acid ester; and the content of the styrene monomer in all monomer components used as starting materials for the emulsion particles is 10 to 55% by mass.