Table 1 Typical composition of resin acids in Chinese gum rosin, Portuguese gum rosin, and Swedish tall oil rosin
Resin acids present in the acid fraction (%) | |||
|---|---|---|---|
Resin acids | Chinese gum rosin | Portuguese gum rosin | Swedish tall oil rosin |
Abietic acid | 56 | 48 | 43 |
Levopimaric acida | – | – | – |
Palustric acid | 14 | 15 | 8 |
Neoabietic acid | 12 | 15 | 3 |
Dehydroabietic acid | 6 | 5 | 28 |
Pimaric acid | 9 | 9 | 4 |
Isopimaric acid | 1 | 5 | 5 |
Sandaracopimaric acid | 2 | 2 | 2 |
Other free resin acids | 0 | 1 | 7 |