PBI Solutions

Product Description

Polybenzimidazole (PBI) is a high-performance thermoplastic polymer recognized for its exceptional thermal stability, chemical resistance, and mechanical strength. As a trusted supplier of advanced plastics and related services, our company offers a range of PBI-based materials, including PBI resin solutions, tailored to meet the demanding requirements of industries such as fuel cells, membrane separation, aerospace, and electronics.

PBI resin solution, characterized by its high molecular weight, is a stable formulation of PBI polymer dissolved in polar aprotic solvents such as DMAC (dimethylacetamide), DMF (dimethylformamide), NMP (N-methyl-2-pyrrolidone), or DMSO (dimethyl sulfoxide). These solutions serve as versatile intermediates for the fabrication of membranes, coatings, and high-temperature-resistant materials.

• Color: Brown viscous liquid
• Materials: PBI
• Volume options: 25 mL, 500 mL, 1 L
• Industries: PBI film and PBI coating (Fuel cells, filtration & separation, electrical insulation, aerospace and electronics)

Product Specifications

Catalog	Product	Molecular Weight	Solvent	Polymer Content	Viscosity
PL-PBI-A011	PBI Solution	100,000-200,000 g/mol	DMAC, DMF, NMP, DMSO	5,10,15,20 wt%	500-30,000CPs

Advantages

• Excellent thermal stability (operational above 400°C)
• Strong acid/base resistance
• Durable mechanical performance
• Good film-forming capability for coatings and membranes

Preparation Methods of PBI Solutions

The preparation of PBI resin solutions involves the dissolution of pre-synthesized PBI polymer into high-boiling-point, polar solvents under controlled conditions. The key steps include:

• Polymer Synthesis: PBI is synthesized via polycondensation between aromatic tetraamines (e.g., 3,3'-diaminobenzidine) and aromatic dicarboxylic acid derivatives (e.g., diphenyl isophthalate or isophthalic acid).
• Solvent Dissolution: The purified PBI polymer is dissolved in a solvent such as DMAC, DMF, NMP, or DMSO under elevated temperatures, forming a homogeneous and stable resin solution.
• Viscosity Control: The concentration and molecular weight are carefully regulated to ensure optimal film-forming and coating properties, enabling applications in advanced material processing.

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