Polysiloxane-Polyester Block Copolymer Anti-Graffiti Coating
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Solution Overview
Problem
Existing polysiloxane-polyester copolymers lack durability in heat resistance and non-stick properties, particularly in anti-graffiti performance for coatings on substrates.
Innovation Solution
A polysiloxane-polyester block copolymer comprising a siloxane resin block, a siloxane linear block, and a polyester block, formed through specific condensation reactions, providing enhanced thermal resistance, hardness, and anti-graffiti properties by incorporating siloxane resin-linear block with chemical bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polysiloxane-polyester copolymers are used for coatings, then heat resistance and non-stick properties are provided, but durability of heat resistance and non-stick properties as well as anti-graffiti properties are insufficient
Solution Approach 1:
The copolymer is segmented into distinct blocks: siloxane resin blocks (providing heat resistance and hardness), siloxane linear blocks (providing flexibility and non-stick properties), and polyester blocks. This segmentation allows each block to contribute its specific properties, resulting in a coating with durable heat resistance, maintained non-stick properties, and improved anti-graffiti performance.
Solution Approach 2:
The invention creates a composite block copolymer structure combining siloxane resin, siloxane linear, and polyester components. This composite approach integrates the thermal stability and hardness of siloxane resin with the flexibility and release properties of siloxane linear and polyester, achieving a balanced coating that maintains durability, heat resistance, non-stick properties, and anti-graffiti characteristics simultaneously.
2Stability of the object's composition
If polyester content is increased to improve flexibility and pigmentability, then low thermoplasticity is achieved, but heat resistance may be compromised
Solution Approach 1:
Different blocks of the copolymer have specialized local functions: siloxane resin blocks are positioned to provide heat resistance and hardness, siloxane linear blocks provide flexibility and non-stick properties, and polyester blocks contribute to pigmentability and low thermoplasticity. This local quality distribution allows the coating to exhibit low thermoplasticity and flexibility from polyester and siloxane linear blocks while maintaining heat resistance through siloxane resin blocks.
Solution Approach 2:
The composite block copolymer structure combines polyester with siloxane resin and siloxane linear components. The polyester blocks provide low thermoplasticity and flexibility, while the siloxane resin blocks compensate for heat resistance, creating a synergistic effect where the coating maintains both flexibility and thermal stability that neither component could achieve alone.
3Temperature
If siloxane resin content is increased to improve heat resistance and hardness, then thermal stability is enhanced, but flexibility and non-stick properties may deteriorate
Solution Approach 1:
The copolymer structure assigns specific local functions to different blocks: siloxane resin blocks provide heat resistance and hardness, while siloxane linear blocks provide flexibility and non-stick properties. This local quality differentiation ensures that increasing siloxane resin content enhances thermal stability without compromising flexibility, as the siloxane linear blocks maintain their柔韧性和防粘特性.
Solution Approach 2:
The composite block copolymer integrates siloxane resin blocks with siloxane linear blocks and polyester blocks. The siloxane resin provides thermal stability and hardness, while the siloxane linear component contributes flexibility and release properties, creating a synergistic composite where high heat resistance and flexibility coexist without compromising either property.
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 polysiloxane-polyester block copolymer forms a durable protective coating on substrates like aluminum, stainless steel, and glass, offering improved heat resistance, hot hardness, release, and anti-graffiti performance.
Implementation Method 1
The polysiloxane-polyester block copolymer is generally formed having three-dimensional units, typically formed via condensation reactions
Data Source
AI summary
A polysiloxane-polyester block copolymer is provided, which comprises: (i) a siloxane resin block comprising : a siloxane unit represented by the formula: R 1SiO 3/2, wherein R 1 is a monovalent hydrocarbon group, and comprising optionally a siloxane unit represented by the formula: SiO 4/2; (ii) a siloxane linear block represented by the formula: (R 2 2SiO 2/2) n, wherein each R 2 is independently a monovalent hydrocarbon group, and "n" is a positive number of at least 5; and (iii) a polyester block. The polysiloxane-polyester block copolymer can be used for a protective coating on a substrate which is made of aluminum, stainless steel, iron, plastics or glass to provide durable heat-resistance, hot hardness, release and anti-graffiti properties.