Name | 3,9-bis(octadecyloxy)-2,4,8,10-tetraoxa-3,9-dipho |
Synonyms | AO-118 Weston 618 Antioxidant 618 3,9-Bis(octadecyloxy) Distearylpenta-di-phosphite Distearylpentaerythritol Diphosphite Distearyl Pentaerythrityl Diphsophite Distearic pentaerythritol diphosphite Distearyl pentaerythrityl diphosphite O,O-dioctadecylpentaerythritol bis(phosphite) CYCLICNEOPENTANETETRAYLBIS(OCTADECYLPHOSPHITE) 3,9-bis(octadecyloxy)-2,4,8,10-tetraoxa-3,9-dipho -2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane 2,4,8,10-Tetraoxa-3,9-diphosphaspiro5.5undecane, 3,9-bis(octadecyloxy)- 3,9-Bis(octadecyloxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane |
CAS | 3806-34-6 |
EINECS | 223-276-6 |
InChI | InChI=1/C41H82O6P2/c1-3-5-7-9-11-13-15-17-19-21-23-25-27-29-31-33-35-42-48-44-37-41(38-45-48)39-46-49(47-40-41)43-36-34-32-30-28-26-24-22-20-18-16-14-12-10-8-6-4-2/h3-40H2,1-2H3 |
InChIKey | PZRWFKGUFWPFID-UHFFFAOYSA-N |
Molecular Formula | C41H82O6P2 |
Molar Mass | 733.03 |
Density | 1.05[at 20℃] |
Melting Point | 44-47°C(lit.) |
Boling Point | 692.2±55.0 °C(Predicted) |
Flash Point | >230°F |
Water Solubility | 330ng/L at 25℃ |
Vapor Presure | 0Pa at 25℃ |
Appearance | neat |
Storage Condition | 2-8°C |
MDL | MFCD00071522 |
Physical and Chemical Properties | White waxy solid. Melting point 54-56 ℃, relative density 0.940-960(50/15.5 ℃), refractive index 1.4610-1.4660(50 ℃). Solubility (g/14.7g solvent, 25 ° C): benzene 0.3, hexane 45.0, chloroform 0.3, acetone 0.3, methanol; Insoluble in water. |
Use | Widely used as polyolefin, polystyrene, ABS resin, polycarbonate, polyester processing stabilizer and thermal oxygen stabilizer |
WGK Germany | 3 |
HS Code | 29092000 |
LogP | 16.4 at 25℃ |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
synthesis | chemical synthesis route and reaction principle regarding the synthesis method of this product, the current literature reports mainly include the following three kinds: 1. triphenyl phosphite method (phenol method) reaction is carried out in two steps: fig. 1 is a synthesis route of distearyl pentaerythritol phosphite by triphenyl phosphite method (phenol method). This method uses triphenyl phosphates as raw materials, the price is higher, resulting in high production costs, in addition to the reaction formula, the product produced by this method in addition to the target product, there are also very easy to oxidize color phenol can not be removed, affecting product quality, but also limit the application of products in food and drug packaging. 2. Triethyl phosphite transesterification method (phenol-free method) uses ethanol and phosphorus trichloride to react in the presence of acid binding agent to prepare triethyl phosphite, and then triethyl phosphite with pentaerythritol and stearol React to obtain 618. Figure 2 is a synthetic route for the synthesis of distearyl pentaerythritol phosphite by triethyl phosphite transesterification (phenol-free method). The triethyl phosphite transesterification method can solve the problem of residual phenol, and the production cost is similar to the triphenyl phosphite method, but the triethyl phosphite is not as stable as triphenyl phosphite, and the production is more troublesome. This method is less studied. 3. Phosphorus trichloride direct method (phenol-free method) uses phosphorus trichloride, pentaerythritol and stearyl alcohol as raw materials, and uses organic amines as acid binding agents to absorb hydrogen chloride gas. The obtained product does not contain phenol and has high yield., The production conditions are mild, the production equipment is simple, and it is easy to realize industrialization. The principle is as follows: Figure 3 is a direct method of triethyl phosphite phosphorus trichloride (phenol-free method) transesterification (phenol-free method) synthesis of distearyl pentaerythritol phosphite synthesis route. |
application | diethyl pentaerythritol diphosphite is mainly used as auxiliary antioxidant for various synthetic resins such as polyethylene, polypropylene, polyvinyl chloride, ABS resin, polyester, etc. It has a prominent effect on preventing oxidation and improving color; it has high thermal stability, weather resistance and hydrolysis resistance. Therefore, it has good processing stability and good product transparency; no pollution, and UV absorbers, Phenolic antioxidants have a good synergistic effect. At the same time, it is also a good food antioxidant. Due to its low toxicity, it can replace the food antioxidant BHT and has passed the FDA certification of the US Food and Drug Administration. This product is produced by General Electric Company of the United States, Borg-Huana Company, Chengbei Chemical Company of Japan, and produced and applied by Jilin Chemical Company in China. |
use | this product is an auxiliary antioxidant, suitable for polyethylene, polypropylene, polyvinyl chloride and polyester. The product has good transparency, no pollution, and has a synergistic effect with ultraviolet absorption in the past. Widely used as processing stabilizer and thermal oxygen stabilizer for polyolefin, polystyrene, ABS resin, polycarbonate, polyester |
Production method | It is obtained by the reaction of dichloropentaerythritol diphosphite and octadecanol. Among them, dichloropentaerythritol diphosphate is obtained by the reaction of pentaerythritol and phosphorus trichloride. Another production method is to react pentaerythritol with triphenyl phosphite, and then interesterify with octadecanol to obtain the product. |
toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |