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factory price gum rosin ww grade
factory price gum rosin ww grade

natural gum rosin ww grade China original gum rosin color: transparent light yellow gum rosin ww grade sample is available

Gum rosin also called colophony, is a solid form of resin obtained from pines and some other plants, mostly conifers, produced by heating fresh liquid resin to vaporize the volatile liquid terpene components. It is semi-transparent and varies in color from yellow to black. At room temperature rosin is brittle, but it melts at stove-top temperatures. It chiefly consists of different resin acids, especially abietic acid.

 

 

Standard: GB/T 8145/8146-2003

Specifications

Item

X

WW

WG

N

M

K

Color

slightly yellow

pale yellow

yellow

deep yellow

yellow brown

yellow red

 
 

Correspond to the standard glass color piece of rosin

 Appearance

transparent solid

 Softening Point(ball&ring)

76oC min

75oC min

74oC min

 Acid No. ( mgKOH/g )

166min

165min

164min

 Unsaponifiable Material

5% max

6%max

 Alcohol insoluble Material

0.03%max

0.04%max

 Ash ( % ), max

0.02

0.03

0.04

 

Packing: In galvanized iron drum about 225kg/drum, 18MT in the 20'FCL

 

Features:

1) China original gum rosin

2) Natural organic compound, mainly composed of resins

3) Possesses chemical activity when dissolved in many organic solvents

4) Used for the manufacturing of paper, paint, soap and printing ink

5) Easily softened and oxidized

6) In the oil paint industry, the carboxylation reaction of resin acid is usually employed to produce resinate for further use

7) In the producing of synthetic rubber and printing ink, resin acid is changed into disproportionate rosin, polymerized rosin, hydrogenated rosin, for further use by its double bond reaction

 

Usage: It is used in paper, ink, rubber, paints and varnish, various adhesives, glue, soap, synthetic resins, chewing gum and other chemical industries.

 

  

factory price gum rosin ww grade

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