Synthesis of Core-Shell Polyborosiloxanes as a Heat-Resistant Platform

Area of Science:

• Materials Science
• Polymer Chemistry
• Inorganic Chemistry

Background:

• Developing advanced materials for high-temperature applications is crucial for industrial coatings.
• Existing binders often face limitations in thermal stability and adhesion under extreme conditions.
• Incorporating boron into siloxane networks offers potential for enhanced properties.

Purpose of the Study:

• To synthesize novel polyborosiloxanes (PBSs) with a core-shell structure.
• To evaluate the performance of these PBSs as binders in heat-resistant paints.
• To investigate the impact of boron incorporation on thermal properties and adhesion.

Main Methods:

• Sequential synthesis of a polysiloxane core followed by shell formation with boric acid.
• In situ core-shell formation via controlled condensation reactions.
• Application of the resulting resin as a binder in aluminum pigment-based heat-resistant paint.

Main Results:

• Successfully prepared polyborosiloxanes with a distinct core-shell morphology.
• The heat-resistant paint exhibited excellent adhesion up to 600°C on metal substrates.
• Core-shell PBS demonstrated superior adhesion compared to one-pot synthesized PBS.
• The material imparted flame-retardant properties to the coating.

Conclusions:

• The straightforward synthesis of core-shell polyborosiloxanes provides a viable route to high-performance binders.
• These materials significantly enhance the thermal stability and adhesion of industrial coatings.
• The incorporation of boron via a core-shell structure offers a dual benefit of heat resistance and flame retardancy.