Silicone-Based Emulsion for Waterborne Resin Compatibility
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Solution Overview
Problem
Waterborne organic resin compositions face challenges in achieving improved hydrophobicity, scratch resistance, and gloss retention, especially when exposed to outdoor conditions, due to the incompatibility of silicone materials with waterborne systems and the complexity of incorporating crosslinked silicone gels or elastomeric compounds.
Innovation Solution
A crosslinkable silicone-based emulsion is developed by reacting hydroxyl-terminated silicone with colloidal silica, using a catalyst and emulsion stabilizers, which is then combined with an organic resin emulsion to create a waterborne co-binder silicone-organic resin composition, enhancing the resin's properties through improved compatibility and processing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicone materials are added to waterborne organic resin compositions to improve weather resistance, then hydrophobicity and durability are improved, but compatibility and miscibility deteriorate
Solution Approach 1:
The patent uses water-soluble silane coupling agents as intermediary substances that contain both hydrophilic groups (for waterborne compatibility) and hydrophobic silicone groups (for weather resistance). These coupling agents act as bridges between the waterborne organic resin and silicone materials, enabling compatibility while maintaining the desired weather resistance properties.
Solution Approach 2:
The invention creates composite emulsion systems that combine waterborne organic resin, silicone emulsion, and silane coupling agents into a unified composition. This composite approach allows the system to exhibit both the water-solubility needed for application and the hydrophobicity needed for weather resistance, resolving the contradiction between compatibility and durability.
2Reliability
If crosslinked silicone gels or elastomeric compounds are used to improve durability, then scratch resistance and gloss retention are improved, but processing complexity increases
Solution Approach 1:
The patent incorporates crosslinking agents and catalysts directly into the emulsion formulation during the manufacturing stage. This preliminary action ensures that crosslinking occurs automatically under application conditions without requiring separate processing steps, thereby achieving enhanced durability while maintaining simple processing.
Solution Approach 2:
The emulsion system is designed to self-crosslink upon application through ambient moisture or mild heating, eliminating the need for complex external crosslinking equipment or multi-step processing. The system performs the crosslinking function autonomously, reducing processing complexity while achieving the desired durability and scratch resistance.
3Reliability
If large amounts of silicone oils or resins are added to improve hydrophobicity, then water resistance is improved, but compatibility with waterborne resins deteriorates
Solution Approach 1:
The patent changes the chemical parameters of silicone materials by using modified silane-containing silicones and emulsion forms instead of conventional silicone oils or resins. This parameter change enables the incorporation of large amounts of silicone (for water resistance) while maintaining compatibility with waterborne resins through the modified chemical structure and emulsion formulation.
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 resulting waterborne co-binder silicone-organic resin composition demonstrates enhanced hydrophobicity, scratch resistance, and gloss retention, providing a durable and elastic film with improved performance under environmental aging conditions.
Implementation Method 1
the reaction product of (i) a hydroxyl terminated silicone with (ii) a colloidal silica to form a crosslinkable silicone moiety
Implementation Method 2
comprising (A) a crosslinkable silicone based emulsion comprising the reaction product of (i) a hydroxyl terminated silicone with (ii) a colloidal silica to form a crosslinkable silicone moiety, and (iii) a catalyst, (iv) an emulsion stabilizer and (v) surfactant
Implementation Method 3
comprising (A) a crosslinkable silicone based emulsion comprising the reaction product of (i) a hydroxyl terminated silicone with (ii) a colloidal silica to form a crosslinkable silicone moiety, and (iii) a catalyst
Implementation Method 4
When an aqueous acrylate polymer emulsion obtained by emulsion polymerization is dried at room temperature or elevated temperature conditions, a coating is obtained
Data Source
AI summary
A crosslinkable silicone based emulsion composition includes a hydroxylated polydiorganopolysiloxane grafted onto at least one colloidal silica dispersion, wherein the at least one hydroxylated polydiorganopolysiloxane grafted onto the least one colloidal silica dispersion contains residual silanol groups from the at least one hydroxylated polydiorganopolysiloxane. Further, a waterborne co-binder silicone-organic resin composition includes (A) the crosslinkable silicone emulsion and (B) an organic resin emulsion which provides improved cured properties including, but not limited to, improved hydrophobicity (water resistance), scratch resistance and gloss retention as well as process for making the emulsions and the compositions.