Description

1,3-Isobenzofurandione, Polymer With 2,2-Bis(Bromomethyl)-1,3-Propanediol, 2,5-Furandione And 3A,4,7,7A-Tetrahydro-1,3-Isobenzofurandione is a specialized brominated polymeric resin designed for high-performance applications requiring flame retardancy and thermal stability. This engineered copolymer is valued for its ability to impart significant fire resistance without compromising the mechanical integrity of the final material. It is a critical additive for manufacturers in the electronics, construction, and advanced polymer composites sectors seeking to meet stringent international safety standards.

Application

• As a reactive flame retardant in epoxy molding compounds (EMCs) and printed circuit board (PCB) laminates.
• Incorporation into thermoset resins for electrical insulation components and automotive under-the-hood parts.
• Use in high-temperature polymer alloys and engineering plastics to enhance fire safety ratings (e.g., UL 94 V-0).
• Formulation of flame-retardant coatings and adhesives for aerospace and mass transport interiors.
• As an additive in polyurethane foams and unsaturated polyester resins for construction materials.
• Development of halogenated copolymer systems for wire and cable jacketing requiring low smoke emission.

Basic Information

Product Name	1,3-Isobenzofurandione, Polymer With 2,2-Bis(Bromomethyl)-1,3-Propanediol, 2,5-Furandione And 3A,4,7,7A-Tetrahydro-1,3-Isobenzofurandione
CAS No.	69961-72-4
Molecular Formula	(C8H4O3·C7H12Br2O2·C4H2O3·C8H8O3)n
Molecular Weight	Polymeric substance (Contact for details)
Synonyms	Brominated Polymeric Flame Retardant; Tetrabromobisphenol A Diacrylate Oligomer; Poly(phthalic anhydride-co-tetrabromobisphenol A diacrylate); Brominated Epoxy Oligomer; TBBPA-Acrylate Oligomer; Tetrabromobisphenol A Di(glycidyl acrylate) Oligomer; Flame Retardant Resin 69961-72-4; Brominated Acrylic Polymer
EINECS	Contact for details

Quality Control

Our production of this brominated polymer adheres to rigorous quality testing protocols to ensure batch-to-batch consistency and performance reliability. Quality is verified against key parameters including bromine content, viscosity, epoxy equivalent weight (EEW), and thermal stability. Certificates of Analysis (COA) documenting purity, halogen content, and residual monomers are available upon request to support your compliance and formulation 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). Keep away from heat sources and incompatible materials such as strong bases and oxidizing agents. This product is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Pale yellow to amber solid or viscous resin
Bromine Content (Br)	48 - 52 % (w/w)
Epoxy Equivalent Weight (EEW)	300 - 500 g/eq
Viscosity (at 25°C)	5,000 - 50,000 mPa·s (Solution dependent)
Softening Point	60 - 100 °C
Acid Value	≤ 5.0 mg KOH/g
Volatile Content	≤ 1.0 %
Identification (IR)	Conforms to reference spectrum

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