Method for producing modified rosin & ester

Details Method for producing modified rosin & ester Method for producing modified rosin & ester

1986-12-17

1988-05-17

Anderson, Harold D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260102, C09F 700

Patent

active

047449250

ABSTRACT:
The catalytic combination of phosphinic acid (also called hypophosphorous acid) and a phenol sulfide compound is disclosed to accelerate the reaction rate for the esterification of a modified rosin with a polyhydric alcohol, as well as provide product color improvements. According to the process of the invention, a rosin is reacted with up to a 50% equivalent excess of the polyhydric alcohol in the presence of phosphinic acid and a phenol sulfide compound at a temperature of from about 180.degree. C. to about 300.degree. C. The rosin may be treated with a member of the group consisting of a phenol, an aldehyde, a dibasic acid, and a combination thereof.

REFERENCES:
patent: 4643348 (1987-02-01), Thomas et al.
patent: 4650607 (1987-03-01), Lampo et al.
patent: 4657706 (1987-04-01), Durkee

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