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Uses:
Raw material for making soap, paper, oil paint,
rubber and synthetic resins.
Gum Rosin is also used as an Intermediate for
synthetic organic chemicals.
At present, most rosin product is used for the
manufacturing of paper, paint, soap and printing ink. Since rosin is easily
softened and oxidized, in the oil paint industry, the carboxylation reaction of
resin acid is usually employed to produce resinate for further use. While in
the producing of synthetic rubber and printing ink, resin acid is changed into
disproportionate rosin, polymerized rosin, hydrogenated rosin, etc for further
use by its double bond reaction.
Standard
for Gum rosin (National Std UDC GB/T8145-2013)
Item
|
Grade and Requirement
|
|||||
X
|
WW
|
WG
|
N
|
M
|
K
|
|
Color
|
Light Yellow
|
Pale Yellow
|
Yellow
|
Deep Yellow
|
Yellow Brown
|
Yellow Red
|
Appearance
|
Transparent
|
Solid
|
||||
Softening Point (ball & ring)
|
76 0C min
|
750C min
|
740C min
|
|||
Acid No. (mgKOH/g)
|
166 min
|
165 min
|
164 min
|
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Unsaponifiable Material
|
5% max
|
|||||
Alcohol Insoluble Material
|
0.03% max
|
0.04 % max
|
||||
Ash(%) max
|
0.02
|
0.03
|
0.04
|
|||
How to make gum
rosin?
There are 4 kinds of pine producing gum rosin: pinus
merkusii Jungh et de Vries, Pinus kesiya Royle, Pinus massoniana Lamb and Caribe.
Caribe Pine is the best for making resin.
Caribe Pine after 10 years can make gum
rosin, 6-8kg/tree/year
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