From: A novel Brönsted–Lewis acidic heteropoly organic–inorganic salt: preparation and catalysis for rosin dimerization
Catalysts
Softening point (°C)
Acid value (mg/g)
Gum rosin
80.4
164.0
Blank
88.3
165.0
H3PW12O40
86.5
137.8
[TEAPS]3PW12O40
103.7
134.7
Sm0.66[TEAPS]PW12O40
111.9
147.9
Sm0.33[TEAPS]2PW12O40
120.1
111.8