BDP|CAS 5945-33-5
BDP stands for Bisphenol A-bis(diphenyl phosphate), CAS number 5945-33-5, with the structural formula CHO8P2. It has a decomposition temperature greater than 250℃ and is a commonly used halogen-free phosphate flame retardant. It has completely different physicochemical properties and applications compared to ADP flame retardants. BDP flame retardants are characterized by resistance to exudation, radiation resistance, good resin compatibility, low volatility, good temperature resistance, hydrolysis resistance, and long flame retardant time. BDP exhibits good flame retardant effects in materials such as PC, PC/ABS alloys, HIPS/PPO, rubber/elastomers, and textiles/fibers.
I. Basic Information
Product Name: BDP
CAS Number: 5945-33-5
English Name: Bisphenol A-bis (diphenyl phosphate)
Phosphorus Content: 8.9%
Molecular Weight: 696.04.
Appearance: Colorless, transparent liquid
Relative density: 1.258 g/ml
N=1 content: 80-89%
II. Product Features
1. Green and environmentally friendly: BDP is free of chlorine, bromine, antimony, etc., and has low smoke and low toxicity, making it environmentally friendly.
2. Good compatibility with PC, PVC, PC/ABS alloys, HIPS/PPO, rubber elastomers, textile fibers, etc., while requiring low dosage and exhibiting good flame retardant effect.
3. Good stability: BDP has significant advantages in thermal stability, volatility, migration, and exudation resistance among similar halogen-free flame retardants. In particular, it is much better than inorganic flame retardants such as aluminum hypophosphite, aluminum hydroxide, magnesium hydroxide, and zinc borate in terms of dispersion and migration.
III. Quality Standards
Color (APHA) ≤ 80
Acid Value (mgKOH/g) ≤ 0.1
Moisture (wt.%) ≤ 0.1
Density (25℃, g/cm3): 1.260±0.010
Viscosity (40℃, mPa.s): 1800-2600
TPP Content (wt.%) ≤ 3.0
Phenol Content (ppm) ≤ 500
IV. Production and Preparation Methods
1. Phosphorus Oxide and Bisphenol A Reaction Method: Phosphorus oxychloride first reacts with bisphenol A to obtain bisphenol A tetrachlorobisphosphate, then undergoes an end-capping reaction with phenol to obtain BDP flame retardant.
2. Diphenylphosphine Chloride Synthesis Method: First, phosphorus oxychloride reacts with phenol to obtain diphenylphosphine chloride, then diphenylphosphine chloride reacts with bisphenol A to generate BDP flame retardant. 3. Sodium Phenol Method: Using sodium phenol instead of phenol as a raw material, BDP is obtained by end-capping bisphenol A tetrachlorobisphosphate with sodium phenol.
V. Applications:
BDP is a halogen-free phosphate flame retardant with advantages such as low volatility, excellent hydrolytic stability, and thermal stability. It can be used as a flame-retardant plasticizer for engineering plastics such as PC/ABS and PPO/HIPS. It can also be used as a high-thermal-stability flame-retardant plasticizer for PVC.
VI. Packaging:
Packaged in iron drums, net weight 250 kg.
When BDP flame retardant is mixed with polymers, the polymer first burns, generating heat. At high temperatures, it forms a phosphate ester glassy or stable foam covering layer, isolating oxygen and providing heat insulation, oxygen isolation, and preventing the escape of flammable gases, thus achieving flame retardancy. The high phosphorus content in the BDP flame retardant molecule effectively inhibits free radical reactions during combustion, resulting in excellent flame retardant effects and enabling materials to achieve high flame retardant ratings, such as UL94V-0.