80693-00-1

Basic information

• Product Name: Bis(2,6-di-ter-butyl-4-methylphenyl)pentaerythritol-diphosphite
• Synonyms: 3,9-bis[2,6-bis(1,1-dimethylethyl)-4-methylphenoxy]-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane;ADK Stab PEP 36;bis(2,6-di-ter-butyl-4-methylphenyl)pentaerythritol-diphosphite;BIS(2,6-DITERTBUTYL-4-METHYLPHENYL)PENTAERYTHRITOLDIPHOSPHITE;4,8,10-Tetraoxa-3,9-diphosphaspiro [5.5] undecane, 3,9-bis[2,6-bis(1,1-dimethylethyl)-4-methylphenox2;Bis-(2,6-di-tert-butyl-4-methylphenyl)-pentaerythrityl diphosphate;3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane;2,2'-Bis(2,6-di-tert-butyl-4-methylphenoxy)-5,5'-spirobi[1,3,2-dioxaphosphorinane]
• CAS NO: 80693-00-1
• Molecular Formula: C₃₅H₅₄O₆P₂
• Molecular Weight: 632.75
• EINECS: 410-290-4
• Mol File: 80693-00-1.mol
• Article Data: 1

Chemical Properties

• Melting Point: 235-240°C
• Boiling Point: 577 °C at 760 mmHg
• Flash Point: 380.5 °C
• Appearance: /
• Density: 1.19[at 20℃]
• Vapor Pressure: 1.04E-12mmHg at 25°C
• Solubility: 225.1 in mg/100g standard fat at 20 ℃
• Water Solubility: 10μg/L at 20℃
• CAS DataBase Reference: Bis(2,6-di-ter-butyl-4-methylphenyl)pentaerythritol-diphosphite(CAS DataBase Reference)
• NIST Chemistry Reference: Bis(2,6-di-ter-butyl-4-methylphenyl)pentaerythritol-diphosphite(80693-00-1)
• EPA Substance Registry System: Bis(2,6-di-ter-butyl-4-methylphenyl)pentaerythritol-diphosphite(80693-00-1)

Safety Data

• Statements: 53
• Safety Statements: 61
• Hazardous Substances Data: 80693-00-1(Hazardous Substances Data)

Usage

Flammability and Explosibility

Nonflammable

InChI:InChI=1/C35H54O6P2/c1-23-15-25(31(3,4)5)29(26(16-23)32(6,7)8)40-42-36-19-35(20-37-42)21-38-43(39-22-35)41-30-27(33(9,10)11)17-24(2)18-28(30)34(12,13)14/h15-18H,19-22H2,1-14H3

Synthetic route

2,6-di-tert-butyl-4-methyl-phenol (128-37-0) + 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5] undecane (3643-70-7) → bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite (80693-00-1)

Conditions	Yield
Stage #1: 2,6-di-tert-butyl-4-methyl-phenol With dibutylamine; triethylamine In 1,3,5-trimethyl-benzene at 115 - 125℃; for 2h; Stage #2: 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5] undecane With tributyl-amine; triethanolamine In 1,3,5-trimethyl-benzene at 120 - 130℃; under 150.015 - 225.023 Torr; for 0.5h;	80.6%

Upstream product

• 128-37-0 2,6-di-tert-butyl-4-methyl-phenol 
• 3643-70-7 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5] undecane 

Relevant articles and documents

Novel high-temperature-resistant phosphite antioxidant ST-636 and preparation method and application thereof

The invention discloses a novel high-temperature-resistant phosphite antioxidant ST-636 and a preparation method and application thereof. The preparation method comprises the following steps: S1, adding reaction mesitylene, pentaerythritol and phosphorus trichloride into a reaction container, and reacting to generate an intermediate, S2, vacuumizing the reaction container, and carrying out a reflux reaction, S3, adding new mesitylene, BHT, triethylamine and di-n-butylamine for reaction to obtain a reaction solution, S4, adding tri-n-butylamine and triethanolamine to carry out neutralization reaction to obtain a product mixed solution, S5, adding a filter aid type diatomite, and then carrying out hot filtration, S6, washing, filtering and drying the crystals, and S7, adding a sodium hydroxide aqueous solution, and carrying out a replacement reaction to obtain the di-n-butylamine. The novel phosphite antioxidant ST-636 prepared by the method has excellent heat-resistant stability and volatility resistance, is widely applied to special plastics with higher processing temperature, and effectively improves and enhances the high-melting processing heat stability, discoloration resistanceand fluid melting stability of the special plastics.