Polybenzimidazole Epoxy Coating Adhesion Thermal Resistance
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Solution Overview
Problem
There is a need for coatings that provide excellent stability and resistance to high temperature, chemical, and corrosive environments while maintaining strong adhesion to substrates, particularly in applications such as internal combustion engines and semiconductor manufacturing.
Innovation Solution
A coating composition comprising a polybenzimidazole polymer and an epoxy resin, which may include a primer and an adhesion promoter, applied with a solvent system to ensure effective adhesion and stability on metal and ceramic substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polybenzimidazole coating is used to provide high temperature and chemical resistance, then thermal stability and chemical resistance are improved, but adhesion to substrate deteriorates
Solution Approach 1:
The patent applies composite materials by combining polybenzimidazole polymer with epoxy resin in a coating composition. The epoxy resin serves as an adhesion promoter that bonds to the substrate, while the polybenzimidazole provides thermal and chemical resistance. This composite approach allows both adhesion and protective properties to coexist in the same coating system.
Solution Approach 2:
The epoxy resin acts as an intermediary between the polybenzimidazole coating and the substrate. It provides a bonding interface that ensures strong adhesion while allowing the polybenzimidazole component to maintain its protective functions against heat and chemicals.
2Strength
If a primer is added to improve adhesion, then adhesion to substrate is improved, but coating complexity increases
Solution Approach 1:
The patent merges the functions of the coating and adhesion promoter into a single composite coating composition. The polybenzimidazole and epoxy resin are combined in one formulation that can be applied as a single coating layer, eliminating the need for separate primer and topcoat applications.
Data Source
AI summary
A coating is a mixture of polybenzimidazole polymer and an epoxy. The coating may further include a primer underlying the coating. The coating may further include an adhesion promoter. A solution includes a polybenzimidazole polymer, an epoxy resin, an initiator, and a carrier solvent. The solution may further include a stabilizer and/or an adhesion promoter.