Detailed Introduction

Repazole^® PBI Resin and Dispersion

Product Overview

Our PBI resin and dispersions are synthesized in-house and are offered in two families: mPBI (hot-press grade; high-temperature, high-rigidity) and OPBI (membrane grade; flexible, readily soluble and dispersible). The OPBI line is supplied in four molecular-weight grades — VR05 / VR10 / VR15 / VR20 (Mn 50,000 / 100,000 / 150,000 / 200,000) — and solid content and viscosity can also be tailored on request. As the material base of the PBI platform, the same resin can be processed into membranes, fibers, stock shapes, and compounds, and is widely used in high-temperature proton-exchange membranes, flow-battery separators, high-temperature coatings, semiconductor encapsulation, and composite matrices.

Key Features

High-temperature resistance: glass transition temperature up to 425 °C, among the highest of engineering polymers;
Full molecular-weight range: the OPBI membrane line offers four grades — VR05 / VR10 / VR15 / VR20 — covering Mn 50,000–200,000; solid content 3%–10% and viscosity 30–25,000 mPa·s are adjustable on request;
Solvent options: available in DMAc, NMP, and other eco-friendly solvent systems;
Versatile form factor: one resin platform serving membranes, fibers, stock shapes, and compounds for integrated downstream development;
Halogen-free and fluorine-free: the molecular structure contains no fluorine, aligning with the global move away from fluorinated materials.

Product Families

Family	Grade class	Form	Features & typical uses
mPBI	Hot-press grade	Powder / pellet	High temperature and rigidity; for hot-pressed stock shapes, compounds, etc.
OPBI	Membrane grade	Powder / dispersion	Flexible, readily soluble and dispersible; for proton-exchange membranes, coatings, and spinning

OPBI Membrane Grades (VR Series)

Grade	Molecular weight (Mn)	MW band
VR05	50,000	Low
VR10	100,000	Medium
VR15	150,000	Medium-high
VR20	200,000	High

The OPBI membrane line is supplied by molecular-weight grade, selectable to the customer's target Mn. Molecular weights are typical values; final specifications are subject to the technical agreement confirmed by both parties.

Specifications

Item	Unit	Typical value	Adjustable range
Molecular weight (Mn)	Da	100,000	50,000–200,000
Solid content	%	6	3–10
Viscosity	mPa·s	3,500	30–25,000
Glass transition temperature (Tg)	°C	425	—
Solvent	—	DMAc	DMAc / NMP / other eco-friendly solvents

Typical values for reference; customizable within the ranges shown. Final specifications are subject to the technical agreement confirmed by both parties.

Typical Applications

High-temperature proton-exchange membranes, flow-battery separators, high-temperature coatings, semiconductor encapsulation, composite matrices, and fiber spinning. Serving aerospace, fire protection, semiconductor, and marine engineering fields.

Need grade selection, a custom molecular weight / solid content, or a quotation? Contact sales@riebom.com or leave a message below — we reply within one business day.

Repazole^® and Armurex^™ are trademarks of Guangzhou Riebom New Material Technology Research Co., Ltd.