Cut the pine tree oil resin after the flow out of the trees. Is a product of physiological activities, mainly by the terpenoids composition. Just out of the colorless transparent oily liquid, exposed to air, with terpene hydrocarbons gradually volatile and thickened, and finally become the solid material - Mao Songxiang white or yellow. The production of rosin and turpentine as raw material.
Woodrosin is from residual rosin pile or root by solvent extraction, distillation and separation of volatile oil and preparation, quality as well. The quality of rosin rosin by color, acid value, softening point and so on. In more than 90% grade rosin for various isomers of abietic acid, the other is the acid some esters and unsaponifiable matter. Abietic acid is a weak acid, esterification and saponification reaction can be carried out; is very sensitive to the role of oxygen, oxidation of the rosin become darker in color, also can be polymerized to form a dimer of two; in 250 ~ 260C. The thermal decomposition of rosin is mainly used for soap, paper and other industries, made all kinds of processing products such as soap, such as pine rosin ester rosin used in coating industry. In China production, mainly in the southwest and Southern China.
Rosin from pine secretion of viscous liquid in refining. A transparent solid material is brittle, colour from yellowish to brownish red. From the collection methods can be divided into rosin and rosin woodrosin. Also called Gum Rosin rosin. From the trunk directly cut out of the collection of sticky juice, called Mao Songxiang; distilled turpentine, refined by refined gum rosin, which is characterized by light color, high acid value, high softening point.
