초록 ▼

Polyphenolic extracts of coniferous tree barks and condensed tannins from wood such as quebracho extracts are etherified by reaction at elevated temperature in the presence of an alkaline catalyst with an olefin containing a double bond-activated carbonyl group having the structure O ↑��

Polyphenolic extracts of coniferous tree barks and condensed tannins from wood such as quebracho extracts are etherified by reaction at elevated temperature in the presence of an alkaline catalyst with an olefin containing a double bond-activated carbonyl group having the structure O ↑��

대표청구항 ▼

Etherified polyphenolic derivatives produced by reacting at a temperature of 110°to 260°C in the presence of an alkaline catalyst a polyphenolic extract selected from the class consisting of bark polyphenolic extracts and condensed tannin wood extracts with (a) an olefin of the formula HR2 ��1C－R3 �

Etherified polyphenolic derivatives produced by reacting at a temperature of 110°to 260°C in the presence of an alkaline catalyst a polyphenolic extract selected from the class consisting of bark polyphenolic extracts and condensed tannin wood extracts with (a) an olefin of the formula HR2 ��1C－R3 �1 and R2 are the same or different and are selected from the group consisting of H, 1 to 3 carbon alkyl, COOH, COOM, COR4 and COOR4 in which M is an alkali metal and R4 is a 1 to 3 carbon alkyl and R3 is selected from the group consisting of H, 1 to 3 carbon alkyl, OH, OM and OR4 or (b) an anhydride of the foregoing olefin; the mole/mole ratios of olefin reactant to monomeric unit in the polyphenolics ranging from about 1:1 to 10:1.