natural 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.

 

  

natural gum rosin ww grade