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P R O D U C T S
Pinus Massoniana & Pinus Elliottii Gum Rosins
| SilicaStar Industries supply two types of gum rosins, Massoniana rosin and Elliottii rosin depending on the kinds of pine source from which the oleoresin is exuded, Pinus Massoniana Lamb or Pinus Elliottii Engelm. Pinus Massoniana Lamb is rich in alpha pinene, while Pinus Elliottii Engelm is rich in alpha pinene. |  |
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Composition
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Pinus Massoniana Lamb
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Pinus Elliottii Engelm
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31.7 1.2 9.5 1.4 |
15.2 12.4 0 0 |
| Alpha-pinene and beta-pinene are two isomeric terpenes which are the major components of gum rosin which can be obtained from the resinous sap of pine trees by steam distillation. Terpene is an unsaturated hydrocarbon whose carbon skeletons are built up from isopentyl (isoprene) C5 units, consisting of five carbon atoms attached to eight hydrogen atoms (C5H8). The alpha form boils at 155-156°C, and of the beta form boils at 165-168°C. It is used as solvents for paints, coatings and wax formulations. It is used as an intermediate for resins and for camphor, menthol, campholenic aldehyde and terpineol. It is used as lube-oil additives. |  |
The physical properties comparison of alpha- and beta-pinene is as the follow:
| Alpha-pinene | Beta-pinene | |
| Structure |  |
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| Molecular formula | C10H16 | C10H16 |
| Molecular weight | 136.24 | 136.24 |
| CAS Registry Number | 2437-95-8 | 18172-67-3 |
| Density | 0.858 | 0.86 |
| Boiling point °C | 155 - 156 | 165 - 168 |