Aspartic Ester Polysiloxane Coatings for Durable Release Performance
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Solution Overview
Problem
Existing silicone-based polysiloxane block-copolymers used in coatings deteriorate upon outdoor exposure, affecting their release properties, and there is a lack of effective use of aspartic acid ester-functional polysiloxanes as release agents in water-based organic coating systems.
Innovation Solution
Development of aspartic acid ester-functional polysiloxanes that provide compatibility with organic coating matrices, offering durable release and antigraffiti effects, along with UV, water, chemical, and thermal resistance, flexibility, and adhesive properties, through the use of specific polyorganosiloxane structures and their emulsions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If polysiloxane block-copolymers with organic polymer backbones are used to improve compatibility with organic coating matrix, then compatibility is improved, but durability upon outdoor exposure deteriorates
Solution Approach 1:
The patent uses aspartic acid ester-functional polysiloxanes that combine silicone backbone with aspartic ester groups to create a composite structure. This composite material provides both compatibility with organic coating matrices through the aspartic ester groups and durability through the stable silicone backbone, resolving the contradiction between adaptability and reliability
Solution Approach 2:
The patent changes the chemical parameters of the polysiloxane by introducing aspartic acid ester functional groups. This parameter change transforms the material properties to achieve both good compatibility with organic coatings and enhanced durability against outdoor degradation, addressing the technical contradiction
2Ease of operation
If traditional silicone materials are used as release agents, then release properties are provided, but antigraffiti durability is insufficient
Solution Approach 1:
The aspartic acid ester-functional polysiloxane creates a composite effect where the silicone portion provides release properties while the aspartic ester functional groups contribute to antigraffiti durability. This composite approach simultaneously achieves both ease of operation (release) and extended duration (antigraffiti protection)
3Ease of manufacture
If aspartic polysiloxane structures are synthesized by esterification with aminosilanes, then reactivity and pot-life are improved, but application in water-based organic coating systems as release agents is not established
Solution Approach 1:
The aspartic acid ester-functional polysiloxane is designed to be universally applicable across different coating systems including water-based organic coatings. The molecular structure provides multi-functionality: reactivity for manufacturing, compatibility for water-based systems, and performance for release and antigraffiti applications, resolving the contradiction between ease of manufacture and adaptability
Data Source
AI summary
The present invention relates to new aspartic acid ester-functional polysiloxanes, their use in the manufacture of curable compositions using polyisocyanate crosslinkers, in particular, in the manufacture of coating compositions, cured compositions obtained from said curable compositions and articles comprising the cured compositions.