Polysiloxane-based coating composition
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Solution Overview
Problem
Existing polysiloxane-based coatings lack sufficient flexibility, weathering resistance, anti-corrosion, and chemical resistance, limiting their effectiveness in protecting substrates under various corrosive conditions.
Innovation Solution
A polysiloxane-based coating composition comprising a non-aromatic epoxide resin, multi-functional (meth)acrylate monomer, and a cure system with alkoxy functional aminosilane, formulated to enhance flexibility and improve resistance to weathering, corrosion, and chemical exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polysiloxane resin is used as anti-corrosive protective coating, then corrosive resistance and weathering resistance are improved, but flexibility is insufficient
Solution Approach 1:
The patent combines polysiloxane resin with epoxide resin and (meth)acrylate monomer to form a composite coating system. This composite approach allows the coating to simultaneously achieve the corrosive resistance and weathering resistance of polysiloxane while gaining the flexibility and adhesion properties of epoxide and (meth)acrylate components through synergistic interaction.
Solution Approach 2:
The patent modifies the polysiloxane resin by introducing epoxide groups and (meth)acrylate functional groups, changing the chemical structure and composition parameters. This structural modification enables the coating to balance protective properties with flexibility by adjusting the molecular architecture and crosslinking density.
2Ease of operation
If epoxide resin is added to improve flexibility, then flexibility is enhanced, but weathering resistance may deteriorate
Solution Approach 1:
The patent creates a three-component composite system where polysiloxane provides weathering resistance, epoxide resin provides flexibility, and (meth)acrylate monomer enhances adhesion and cure characteristics. The composite structure allows each component to contribute its strengths while mitigating individual weaknesses through synergistic interaction.
Solution Approach 2:
The patent assigns different functional roles to different components within the coating system: polysiloxane primarily provides weathering resistance and corrosion protection, epoxide resin primarily provides flexibility and adhesion, while (meth)acrylate monomer provides crosslinking and enhances overall coating performance. This functional differentiation allows optimization of each component for its specific purpose.
3Reliability
If multiple modifiers are added to enhance properties, then coating performance is improved, but formulation complexity increases
Solution Approach 1:
The patent employs (meth)acrylate monomer as a multi-functional component that simultaneously provides adhesion promotion, crosslinking capability, flexibility enhancement, and improved cure characteristics. This multi-functionality reduces the need for multiple separate additives, simplifying the overall formulation while maintaining comprehensive performance enhancement.
Solution Approach 2:
The patent combines epoxide resin and (meth)acrylate monomer into a unified curing system that works synergistically with polysiloxane resin. The epoxide and (meth)acrylate groups undergo combined crosslinking reactions to form an integrated network structure, merging multiple functional benefits into a single cohesive coating system rather than requiring separate treatment steps.
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 composition exhibits improved flexibility, weathering resistance, chemical resistance, and anti-corrosion properties, providing enhanced protection for substrates against environmental factors.
Implementation Method 1
a cure system comprising at least one alkoxy functional aminosilane
Implementation Method 2
a cure system comprising at least one alkoxy functional aminosilane
Implementation Method 3
a non-aromatic epoxide resin having more than one 1,2-epoxide group per molecule with an epoxide equivalent weight of 100 to 5000; a multi-functional (meth)acrylate monomer
Data Source
AI summary
The instant application relates to a polysiloxane-based coating composition, comprising: Polysiloxane of formula I wherein each R1 is independently a hydroxyl group or an alkyl, aryl or alkoxy group having up to 6 carbon atoms, each R2 independently is hydrogen or alkyl or aryl group having up to 6 carbon atoms, and n is selected so that the molecular weight for the polysiloxane is 400 to 10000; a non-aromatic epoxide resin having more than one 1, 2-epoxide group per molecule with an epoxide equivalent weight of 100 to 5000; a multi-functional (meth) acrylate monomer; and a cure system comprising at least one alkoxy functional aminosilane. Furthermore, it also relates to a method of coating surface using said coating composition and the substrate coated therewith.