1, expelling wind and drying dampness
Rosin enters the liver and spleen meridian, which has the function of expelling wind and drying dampness, and is mainly used for diseases such as scrofula, rheumatic joint pain and fistula.
2, discharge pus and pull poison
Pine fragrance is bitter, sweet and warm, and has the function of expelling pus and toxin. Can be used for treating carbuncle, furuncle, ulcer, eczema, traumatic hemorrhage, burn and other diseases.
3, promoting granulation and relieving pain
Rosin is warm and bitter in taste, has the effect of promoting granulation and relieving pain, and can be used to treat joint pain. Golden sore; Sprain; Female leucorrhea; Thrombosis occlusion.
4. Pharmacological effects
Effect on gastrointestinal smooth muscle
Rosin acid can obviously inhibit the peristalsis of jejunum and the spontaneous contraction of isolated intestinal muscles in mice. It can inhibit and relieve gastric muscle spasm induced by pilocarpine or barium chloride in rats. Rosin acid and rosin crude extract have similar effects on intestinal spasm induced by pilocarpine or barium chloride in rabbits.
5. Other functions
α -pinene and β -pinene in rosin have antitussive and expectorant effects. Rosin ethanol solution coated on rabbit skin can prevent Schistosoma cercariae infection. The rosin powder processed by single rosin has anticoagulant effect. The crude extract of rosin has a two-way regulation effect on white blood cells, which can restore the white blood cells below or above the normal value before treatment and has an immune enhancement effect. Horsetail oleoresin has hypotensive effect on anesthetized rats and cats.
6. Toxicity
The ld50 of crude rosin extract to mice was1.725 0.1.66g/kg.
7. Industrial use
(1) flux
Flux is usually a mixture with rosin as the main component, which is an auxiliary material to ensure the smooth welding process. Welding is the main process in electronic assembly, and flux is the auxiliary material used in welding. The main function of flux is to remove the oxide on the surface of solder and the parent material to be welded, so that the metal surface can reach the necessary cleanliness. Prevent the surface from being oxidized again during welding, reduce the surface tension of solder and improve the welding performance. The performance of flux directly affects the quality of electronic products.
(2) Surfactant
Halogen-containing surfactants have strong activity and high welding aid ability, but halogen ions are difficult to clean, have high ion residues, and halogen elements (mainly chlorides) are highly corrosive, so they are not suitable for use as raw materials for non-cleaning flux. The activity of halogen-free surfactant is slightly weak, but the ion residue is less. Surfactants are mainly fatty acids or aromatic nonionic surfactants, and their main functions are to reduce the surface tension when solder contacts lead metal and enhance the surface wettability.
(3) cosolvent
Rosin can prevent the tendency of solid components such as activator from dissolving in solution, and avoid the undesirable phenomenon of uneven distribution of activator.
8. Use and dosage of rosin
External use: appropriate amount, grinding and dry mixing; Or get dressed. Oral administration: decoction, 3-5g; Or take pills, powder or soak in wine.
9, rosin medication taboo
People with blood deficiency and those with internal heat and excess fire are prohibited. Do not take it for a long time. It can only be taken after strict treatment.
① Drug introduction: Do not take it alone, but fill your stomach.
② Classic of Materia Medica: People with deficiency of blood and excessive fire, diseases caused by wind, cold and dampness, should not take salty clothes.
3 "Materia Medica Seeking Truth": Don't take it if the fire is really hot.
10, is rosin poisonous?
The chemical composition of rosin is complex, and the general molecular formula is C 19H29COOH. Mainly composed of rosin acid (70-85%, depending on the origin) and piperic acid (10- 15%). Rosin contains a few percent unsaponifiable carbohydrates; In order to remove rosin flux, saponifier (an alkaline chemical that saponifies water) must be added.
Rosin can be used as chewing gum. The smell of rosin is non-toxic, but inhaling pine smoke is harmful to the lungs, just like inhaling smoke. If rosin contains lead, too much exposure is toxic. The loose smoke produced during welding contains heavy metals, which is toxic if inhaled too much. Used as depilatory for livestock, it is toxic after repeated melting.
As a Chinese herbal medicine, rosin is non-toxic according to normal use. This conclusion can be seen from the introduction of rosin in this paper. Besides consumers should know the nature of rosin, users should also standardize their own methods to avoid toxic rosin during processing.