Name: Rosin

English name: Colophony

Other names: Pine cream, pine fat, pine gum, tar rosin, raw rosin

Chemical formula: C19H29 COOH

Melting point: 110～135℃ (no fixed melting point)

Boiling point: 300°C (0.67kPa)

Water solubility: insoluble in water, soluble in alcohol

Intensity: 1.060~1.085g/cm3

External view: solid, transparent, light yellow or brown

Application: industrial, flux, Chinese medicinal materials, stringed musical instruments, etc.

Safety description: It is not very toxic, but because it contains heavy metals such as lead and toxic compounds, it will seriously affect human health

Sexual quality: non-crystalline

application

1. Rosin is cooked together with soda ash or caustic soda to form rosin soap. Rosin soap has great detergency, is easily soluble in water, can dissolve grease, and is easy to foam. Rosin is sticky and can prevent soap from cracking and rancidity.

2. Rosin is used as a rubber material for papermaking in the paper industry.

3. Rosin is easy to dissolve in various organic solvents, and it is easy to form a film and has gloss. It is one of the basic raw materials for paints and coatings. The role of rosin in paint is to make the paint brighter, dry quickly, and the paint film is smooth and not easy to fall off.

4. Adhesives based on rosin esters and hydrogenated rosin esters are often used as hot-melt adhesives, pressure-sensitive adhesives and rubber tackifiers.