Description

2,8-Dibenzothiophenedicarboxylic Acid, Polymer With 4,4-Oxybis1,2-Benzenediamine is a high-performance polybenzimidazole (PBI)-type polymer derived from specialized aromatic monomers. This advanced material matters for its exceptional thermal stability, chemical resistance, and robust mechanical properties under extreme conditions. It is primarily needed by manufacturers in the aerospace, automotive, and electronics industries for creating high-temperature composites, adhesives, and insulating films.

Application

• Matrix resin for high-temperature carbon fiber and glass fiber composites in aerospace components.
• Precursor for high-performance adhesives and sealants used in automotive and industrial assembly.
• Dielectric material and insulating coating for electronic components and circuit boards.
• Base polymer for gas separation membranes and filtration media in chemical processing.
• Binder and reinforcing agent in specialty ceramic and refractory materials.
• Material for high-temperature gaskets, seals, and O-rings in demanding industrial environments.
• Research and development of novel polymeric materials with enhanced thermal and chemical properties.

Basic Information

Product Name	2,8-Dibenzothiophenedicarboxylic Acid, Polymer With 4,4-Oxybis1,2-Benzenediamine
CAS No.	80678-86-0
Molecular Formula	(C22H12N2O5S)n
Molecular Weight	Polymeric substance
Synonyms	Poly(2,8-dibenzothiophenedicarboxylic acid-co-4,4'-oxydianiline); PBI-type polymer from DBTA and ODA; Poly(benzimidazole) derivative; Aromatic polyamide-imide precursor; Polymer of 4,4'-oxydianiline and 2,8-dibenzothiophenedicarboxylic acid; High-temperature resistant polymer; Thermally stable polyheterocycle; DBTA-ODA copolymer
EINECS	Contact for details

Quality Control

Our production of 2,8-Dibenzothiophenedicarboxylic Acid, Polymer With 4,4-Oxybis1,2-Benzenediamine adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Each lot undergoes comprehensive analysis, including intrinsic viscosity, thermal stability (TGA), and structural verification (FT-IR, NMR). Certificates of Analysis (COA) detailing all specifications are provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This polymer is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent moisture absorption, which can affect processing and final properties.

Specification

Item	Specification
Appearance	Yellow to brown powder or granules
Identification (IR)	Conforms to structure
Inherent Viscosity	0.5 - 1.2 dL/g (at 30°C in conc. H2SO4)
Glass Transition Temperature (Tg)	> 300 °C (DSC)
Thermal Decomposition Temperature (Td)	> 500 °C (TGA, 5% weight loss in N2)
Moisture Content	< 1.0 % (Karl Fischer)
Ash Content	< 0.5 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.