Bisphenol A → 4-tert-Butylphenol

Participants

Reaction Steps

1784 g of water, 385 g of NaOH, and 232 g of bisphenol A (BPA) were added to a polymerization reactor and were then dissolved while mixing under a N2 atmosphere. 4.3 g of p-tert butylphenol (PTBP) and 13.1 g of the siloxane compound obtained according to each of Examples 1 and 2, and Comparative Examples 1 and 2, which was dissolved in methylene chloride (MC), were added thereto. Subsequently, 128 g of triphosgene (TPG) was dissolved in MC, and then a dissolved TPG solution was added thereto and reacted therewith for 1 hour while maintaining pH of the TPG solution at 11 or more. After 10 minutes, 46 g of triethylamine (TEA) was added thereto and thereby a coupling reaction occurred.

Provenance & Evidence