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Rosin is a kind of natural resin, mainly composed of various resin acids, soluble in a variety of solvents, with unique chemical activity. It is an important raw material for papermaking, coating, ink, rubber, soap, electronics, edible ester gum, rosin ester resin and other industries.
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Grades |
Top grade |
1 grade |
2 grade |
3 grade |
4 grade |
5 grade |
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X |
WW |
WG |
N |
M |
K |
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Apperance |
transparent |
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color |
Complying with the rosin stardard . |
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Slight yellow |
pale yellow |
yellow |
Deep yellow |
Yellow brown |
yellow red |
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Softening point, ℃ |
≥ |
76.0 |
75.0 |
74.0 |
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Acid value a, mgKOH/g |
≥ |
166.0 |
165.0 |
164.0 |
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Non-soap content b, % |
≤ |
5.0 |
5.0 |
6.0 |
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Ethanol insoluble, % |
≤ |
0.030 |
0.030 |
0.040 |
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ash content, % |
≤ |
0.020 |
0.030 |
0.040 |
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a South Asian pines have a higher acid value due to their containing of some binary resinic acids.
b Wetland pines have a higher content of non-soaps due to their higher levels of diazole neutral substances.
illustrate:
1. Properties and uses: Rosin is a natural resin, mainly composed of a variety of resinic acids, soluble in a variety of solvents, with unique chemical activity. Paper, coatings, inks, rubber, soap, electronics, edible esters, pine resins and other important raw materials.
2. Packed: Barrel: Net weight 225 kg / iron barrel. Paper bag: 25 kg/bag, 800-1000 kg/pallet
3. This technical indicator is the national standard of the People's Republic of China, and if any changes are made, they will be implemented in accordance with the latest standards and confirmed at the time of signing of the contract.
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