Saturday, April 9, 2011

Colophony (gum rosin)

Colophony composed of various kinds resin acids, and having special physical and chemical properties.
Colophony is a kind of natural resin, that composed of various kinds resin acids, and having special physical and chemical properties.

Colophony is made of natural resin, its generalformulais C20H30020. Because of its special properties, it can be used in paint, paper making, adhesive, soap, rubber, chemicals and medicine.

Parameter
Grade
Standard: GB/T8145-8146-2003
X
WW
WG
APPEARANCE
Transparent
Transparent
Transparent
COLOR
Light Yellow
Pale Yellow
Yellow
SOFTENING POINT(R&B)°C
76.0
76.0
75.0
ACID NUMBER(mg KOH / g)≥
166.0
166.0
164.0
UNSAPONIFIABLE MATTER % ≤
5.0
5.0
5.0
ETHANOL INSOLUBLES % ≤
0.030
0.030
0.030
ASH CONTENT % ≤
0.020
0.020
0.030

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