Epoxy-Siloxane Coating for Chemical Installation Surfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing coatings for chemical installations lack broad chemical resistance and high-temperature stability, particularly when exposed to multiple types of chemicals, and require improved adhesion and film integrity across a range of temperatures.
Innovation Solution
A coating composition comprising epoxy-functional resin, an amine curing agent, and an organic silicon-containing compound, with a molar ratio of silicon atoms to epoxy groups between 0.25-0.75:1.00, which includes epoxy-functional silanes, siloxanes, amino-functional silanes, and silicon-free components, providing enhanced chemical resistance and overcoatability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coatings are used for chemical installations, then the coating provides basic protection, but the coating lacks broad chemical resistance and high-temperature stability
Solution Approach 1:
The coating composition uses a composite system combining epoxy-functional resin with organosilane/organosiloxane compounds containing specific functional groups (amino, epoxy, carboxyl, hydroxyl, or anhydride). This composite approach creates a coating that simultaneously achieves broad chemical resistance across multiple chemical types and high-temperature stability, resolving the contradiction between reliability and adaptability.
Solution Approach 2:
The invention specifies precise molar ratio parameters (0.5:1 to 2:1 of silicon-containing compound to epoxy-functional resin, and 0.8:1 to 1.2:1 of functional groups to epoxy groups) to optimize the coating's chemical resistance and thermal stability. By controlling these compositional parameters, the coating achieves broad-spectrum chemical compatibility while maintaining reliability under varying chemical exposures and temperatures.
2Reliability
If the coating absorbs chemicals, then the coating provides some interaction with chemicals, but the absorption should be minimized to avoid contamination of subsequent chemicals
Solution Approach 1:
The coating's chemical resistance is optimized by controlling the molar ratio of functional groups to epoxy groups within 0.8:1 to 1.2:1, and silicon-containing compounds to epoxy-functional resin within 0.5:1 to 2:1. These parameter controls create a coating that resists chemical absorption while maintaining film integrity, preventing contamination of subsequent chemicals.
3Adaptability or versatility
If the coating is applied at low temperatures, then the coating can be applied in more conditions, but the curing process may be insufficient
Solution Approach 1:
The invention enables coating application at low temperatures (0°C to 40°C) by formulating the coating composition with specific ratios of epoxy-functional resin and silicon-containing compounds with reactive functional groups. The controlled molar ratios ensure sufficient chemical reactivity and crosslinking even at lower temperatures, maintaining cure completeness while expanding the applicable temperature range.
4Stability of the object's composition
If the coating maintains film integrity at elevated temperatures, then the coating provides thermal stability, but the coating composition becomes more restricted
Solution Approach 1:
The coating achieves thermal stability through a composite system of epoxy-functional resin and silicon-containing compounds with specific functional groups. This composite structure provides high-temperature film integrity while the formulation remains relatively simple, using well-established chemical components in controlled ratios rather than complex proprietary mixtures.
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 coating composition demonstrates improved chemical resistance, washability, and thermal stability, suitable for use in storage tanks and chemical installations, maintaining film integrity and resisting absorption of various chemicals.
Implementation Method 1
A coating composition comprising epoxy-functional resin, and amine curing agent for the epoxy-functional resin, wherein the coating composition comprises an organic silicon-containing compound selected from the group of organosilanes and organosiloxanes
Implementation Method 2
allowing the coating layer to cure at a temperature in the range of 0 to 50°C
Data Source
AI summary
The invention pertains to a method for providing a metallic or concrete surface of a chemical installation with a coating, which comprises the steps of - providing a coating composition comprising epoxy-functional resin, and amine curing agent for the epoxy-functional resin, wherein the coating composition comprises an organic silicon-containing compound selected from the group of organosilanes and organosiloxanes, with the molar ratio between the silicon atoms of the organic silicon-containing compound and the epoxy-groups in the coating composition being in the range of 0.20- 0.75:1.00, - applying the coating composition to a metallic or concrete surface of a chemical installation to form a coating layer, and - allowing the coating layer to cure at a temperature in the range of 0 to 50°C. The invention also pertains to a chemical installation comprising a metallic or concrete surface provided with a lining of a cured coating composition and to a coating composition suitable for providing a metallic or concrete surface of a chemical installation with a coating. It has been found that the coating composition of the present invention shows a wide application spectrum and a high chemical resistance.