Flame Retardant Esterification Solution

CEPPA
Chinese name: 2-Carboxyethylphenylphosphinic acid
English name: 2-Carboxyethyl(phenyl)phosphinic acid
Abbreviation: CEPPA
Alias: 3-Hydroxyphenylphosphinylpropanoic acid
Abbreviation: 3-HPP
English name: 3-(Hydroxyphenylphosphinyl)-propanoic acid
CAS No.: 14657-64-8
EINECS No.: 411-200-6
Molecular formula: C₉H₁₁O₄P
Molecular weight: 214.16
Main Quality Indicators:                                                         
Appearance: White powder or crystals
Purity (HPLC): ≥99.0%
Melting point (°C): ≥158
Phosphorus content: ≥14.0±0.5%
Acid value: 522±4 mgKOH/g
Iron content: ≤0.005%
Moisture: ≤0.5%
Packaging: 25KG cardboard drum or plastic-lined packaging bag (or as per customer requirements); Esterification solution: plastic drum, net weight 200KG
Properties: Soluble in water, ethylene glycol, and other solvents; slightly hygroscopic at room temperature; stable under ambient conditions
Applications: This product is a reactive (copolymerizable) phosphorus-based environmentally friendly flame retardant, suitable for permanent flame retardant modification of polyesters and applicable in all fields where conventional PET is used. Flame-retardant polyester products with this additive exhibit spinnability comparable to conventional PET, with identical spinning and stretching properties. The flame-retardant polyester offers excellent thermal stability, does not decompose during spinning, produces no odor at the spinning site, and enhances the antistatic properties of polyester products. It has good spinnability, and its fibers exhibit excellent weavability. It can be processed through any spinning system, and the fabric achieves permanent flame retardancy. When copolymerized with PTA and EG, the addition amount is 2.5~4.5%, resulting in a phosphorus content of 0.35-0.60% in the flame-retardant polyester chips. The limiting oxygen index (LOI) of the spun fabric ranges from 30~36%. It is widely used in flame retardancy for textiles, yarns, chemical fibers, various garments, decorative fabrics, and other flame-retardant applications.
Permanent flame-retardant polyester curtain fabrics, upholstery fabrics, and automotive cushion fabrics produced from flame-retardant polyester chips have been tested by the National Center for Quality Supervision and Test of Fire Fighting Equipment and Fire Building Construction Parts and the National Fireproof Building Materials Quality Supervision and Inspection Center. The oxygen index is 32-33%, meeting the GB8624 B1 grade requirements and has been widely applied.
Our company can also add a certain amount of flame retardant and ethylene glycol according to customer requirements and sell it in the form of an esterification solution to users who do not have the conditions for pre-esterification modulation of flame retardants.
Structural formula: