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Improved Flexibility of Bis-Phenol a Epoxy Paint by Crosslinking with Amino-Functional Siloxane Resin

Bis-Phenol A epoxy resin-based coatings are known for excellent corrosion and chemical resistance. Limitations of this class of coatings are poor flexibility, thermal stability and weather resistance.  Traditional siloxane resins are commonly used in the industry to improve the thermal and weather resistance of bis-Phenol A epoxy coatings. In addition, organo-functional silicone polymers have been used to provide improved flexibility, but create recoatability issues. 

Product Number: 41205-173-SG
Author: Lisa A. Honaman, Gerald L. Witucki
Publication Date: 2005
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Bis-Phenol A epoxy resin-based coatings are known for excellent corrosion and chemical resistance. Limitations of this class of coatings are poor flexibility, thermal stability and weather resistance.  Traditional siloxane resins are commonly used in the industry to improve the thermal and weather resistance of bis-Phenol A epoxy coatings. In addition, organo-functional silicone polymers have been used to provide improved flexibility, but create recoatability issues. Siloxane resins and silicone polymers offer partial solutions to the limitations of bis-Phenol A epoxy coatings, but do not eliminate all of the limitations associated with this system.  To fill this gap, a new class of organo-functional siloxane resins was developed by Dow Corning Corporation as epoxy resin crosslinkers providing flexible coatings with excellent recoat performance.  Detailed work was done to compare modifications of a bis-phenol A epoxy paint using a variety of silicon-based technologies including aminopropyltrimethoxy silane, aminopropylmethyldiethoxy silane, methoxy-terminated siloxane resin, silanolterminated siloxane resin, and amine-terminated siloxane resin.

Bis-Phenol A epoxy resin-based coatings are known for excellent corrosion and chemical resistance. Limitations of this class of coatings are poor flexibility, thermal stability and weather resistance.  Traditional siloxane resins are commonly used in the industry to improve the thermal and weather resistance of bis-Phenol A epoxy coatings. In addition, organo-functional silicone polymers have been used to provide improved flexibility, but create recoatability issues. Siloxane resins and silicone polymers offer partial solutions to the limitations of bis-Phenol A epoxy coatings, but do not eliminate all of the limitations associated with this system.  To fill this gap, a new class of organo-functional siloxane resins was developed by Dow Corning Corporation as epoxy resin crosslinkers providing flexible coatings with excellent recoat performance.  Detailed work was done to compare modifications of a bis-phenol A epoxy paint using a variety of silicon-based technologies including aminopropyltrimethoxy silane, aminopropylmethyldiethoxy silane, methoxy-terminated siloxane resin, silanolterminated siloxane resin, and amine-terminated siloxane resin.

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