Description

Firebrake(R) Zb is a high-performance, zinc borate-based flame retardant and smoke suppressant. This synergistic additive is engineered to enhance fire safety in polymer systems by promoting char formation and reducing smoke emission. It is a critical material for formulators and compounders in the plastics, rubber, and coatings industries seeking to meet stringent fire safety regulations without compromising material properties.

Application

• Halogen-Free Flame Retardant Systems: A key synergist used in conjunction with aluminum trihydrate (ATH) or magnesium hydroxide (MDH) in polyolefins, PVC, elastomers, and engineering plastics.
• Wire & Cable Insulation: Imparts flame retardancy and suppresses smoke in insulation and jacketing compounds for building wire, automotive cable, and telecommunications.
• Polymer Composites: Enhances the fire performance of glass-reinforced composites, sheet molding compounds (SMC), and bulk molding compounds (BMC) used in construction and transportation.
• Coatings & Paints: Used in intumescent and fire-retardant coatings for structural steel, wood, and other substrates to provide a protective char layer.
• Rubber Goods: Incorporated into conveyor belts, seals, and gaskets to improve their fire resistance in industrial settings.
• Adhesives & Sealants: Provides flame retardant properties to high-performance adhesives used in aerospace, automotive, and construction applications.

Basic Information

Product Name	Firebrake(R) Zb
CAS No.	138265-88-0
Molecular Formula	2ZnO·3B2O3·3.5H2O
Molecular Weight	434.66 g/mol (Anhydrous basis)
Synonyms	Zinc Borate; Zinc Borate Hydrate; FBZB; ZB 2335; ZB 467; Boron Zinc Oxide Hydrate; 2ZnO·3B2O3·3.5H2O; Flame Retardant ZB
EINECS	Contact for details

Quality Control

Our Firebrake(R) Zb is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including zinc oxide content, boron oxide content, and loss on ignition. A Certificate of Analysis (COA) detailing these results is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent caking or performance degradation due to moisture absorption.

Specification

Item	Specification
Appearance	White fine powder
Zinc Oxide (ZnO) Content	37.0 - 40.0 %
Boron Oxide (B2O3) Content	45.0 - 48.0 %
Loss on Ignition (LOI)	13.0 - 15.5 %
Particle Size (D50)	Contact for details
Specific Gravity	2.8 g/cm³
Dehydration Temperature	> 290 °C

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