726-05-6

Basic information

• Product Name: Benzene, 1,1'-methylenebis[3,4-dimethyl-
• CAS NO: 726-05-6
• Molecular Formula: C17H20
• Molecular Weight: 224.346
• Mol File: 726-05-6.mol
• Article Data: 4

Chemical Properties

• CAS DataBase Reference: Benzene, 1,1'-methylenebis[3,4-dimethyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Benzene, 1,1'-methylenebis[3,4-dimethyl-(726-05-6)
• EPA Substance Registry System: Benzene, 1,1'-methylenebis[3,4-dimethyl-(726-05-6)

Safety Data

• Hazardous Substances Data: 726-05-6(Hazardous Substances Data)

Upstream product

• 583-71-1 4-bromo-o-xylene 
• 1493-13-6 trifluorormethanesulfonic acid 
• 95-47-6 o-xylene 
• 652-22-2 octafluoroacetophenone 
• 50-00-0 formaldehyd 
• 109-87-5 Dimethoxymethane 
• 2421-28-5 dianhydride of benzophenone-3,4,3',4'-tetracarboxy acid 
• 59054-48-7 4,4'-Methylenbis-(o-toluat) 
• 341495-08-7 C₁₇H₁₆O₄ 
• 625-45-6 2-methoxyacetic acid 
• 59054-49-8 [4-(4-Hydroxymethyl-3-methyl-benzyl)-2-methyl-phenyl]-methanol 

Downstream Products

• 2479-49-4 3,3',4,4'-benzophenonetetracarboxylic acid 

Relevant articles and documents

The Synthesis and Characterization of Highly Fluorinated Aromatic Polyimides

The synthesis and characterization of pendant octafluoro aromatic polyimides (8 F-PIs) derived from 4, 4’-(2, 2, 2-trifluoro-1-pentafluorophenylethylidene)diphthalic anhydride (8 FDA) and several aromatic diamines is described. The synthesis of bis(3,4-dimethylphenyl)pentafluorophenyltrifluoromethylmethane (8 FTM), and 2-(3, 4-dimethylphenyl)-2-pentafluorophenyl-2-trifluoromethylethanol (8 F-OH), the precursors to 8 FDA are also discussed. The synthesis of 8 FTM is accompanied by two major by-products resulting in a low yield of desired product. The presence of the pentafluorophenyl group in the backbone of the fluorinated polyimides introduces flexibility and free volume manifested by lower Tg's than more rigid analogs. The highly fluorinated polyimides exhibited lower dielectric constants than most fluorinated polyimides. The 8 F-PIs cured at a maximum temperature 371 °C/1 hr. exhibited thermal stabilities typical of high performance fluorinated polyimides. High temperature (436 °C) and pressure (281.2 kg/m2, 4000 psi.) post cure of 8 F-PI prepared from 8 FDA and p-phenylene diamine exhibited high thermo-oxidative stability, high density and low moisture absorption.

PROCESS OF PRODUCING 1,1 DIARYL ALKANES AND DERIVATIVES THEREOF

A process of producing a 1,1-diaryl alkane comprising a condensation reaction of an aromatic compound having at least one aromatic hydrogen with an acetal, in the presence of a perfluorinated sulfonic acid in polymeric form as catalyst.