Acetates & Esters, High-Purity Solvents

Butyl Benzyl phthalate (BBP)

Butyl Benzyl Phthalate (BBP) is an organic compound with the chemical formula C19H20O4. As an unsymmetrical phthalate ester, it features both a butyl chain and a benzyl group attached to the phthalic acid backbone. It is primarily characterized as a clear, colorless, oily liquid with a very faint odor. This compound is highly valued in industrial chemistry for its role as a high-solvating plasticizer, exhibiting excellent compatibility with various polymers including polyvinyl chloride and cellulose plastics. Chemically, it possesses low volatility and a high boiling point, which ensures stability during high-temperature processing. Despite its industrial utility, BBP is scrutinized due to environmental and health concerns, leading to its classification as a substance of very high concern in several jurisdictions. It remains a critical component in specialty vinyl formulations where rapid fusion and high gloss are desired. Its unique molecular structure allows for efficient chain lubrication, enhancing the flexibility and durability.

Attributes

Key Features and Benefits

High Solvating Action: Exhibits superior solvating power for PVC, allowing for lower processing temperatures and faster fusion rates.
Stain Resistance: Provides exceptional resistance to surface staining by common household contaminants and oils in vinyl flooring applications.
Excellent Compatibility: Maintains high miscibility with cellulose acetate, ethyl cellulose, and various rubber-based polymers.
Low Volatility: Displays extremely low vapor pressure, minimizing material loss and maintaining mechanical integrity over extended lifetimes.
Visual Clarity: Contributes to high optical clarity and surface gloss in finished transparent plasticized goods.

Specifications

Technical Highlights

Molecular Weight: Possesses a molecular mass of 312.36 g/mol, influencing its boiling point and diffusion characteristics.
Density and Viscosity: Features a density of approximately 1.12 g/cm3 and a dynamic viscosity of 60 cP at 25C.
Boiling Point: Exhibits a high boiling point of 370C at 760 mmHg, ensuring stability under intense thermal loads.
Solubility Parameters: Practically insoluble in water (< 0.01 g/L) but highly soluble in organic solvents like ethanol and acetone.
Refractive Index: Measured at 1.535-1.540 at 20C, assisting in matching the optical properties of diverse polymer matrices.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Vinyl Flooring: Extensively utilized in PVC floor coverings to provide flexibility, durability, and resistance to pedestrian wear and stains.
Sealants and Caulks: Incorporated into polysulfide and polyurethane-based sealants to improve elasticity and adhesion in construction materials.
Automotive Coatings: Acts as a plasticizer in specialized coatings and underbody sealants to resist chipping and thermal stress.
Artificial Leather: Used in the production of synthetic leather fabrics to achieve a soft, supple hand-feel and durability.
Adhesives: Serves as a vital additive in various adhesive formulations, enhancing bond strength and mechanical performance.