History rosin

Natural resins were probably known to early people, who recognized them as exudates from trees. Collection and use of these resins have been recorded by early Roman and Greek historians. Many products have been collected by the same methods throughout history to the present time. However, increased labor costs and competition from synthetic resins have reduced the demand for some natural resins, so they have become less available. In other cases, such as that of rosin, the traditional collection of gum from trees has been supplemented or replaced by isolation from other sources, such as paper pulping and tree stumps. 

The soap of modified rosin has a long history as an emulsifier for the polymerization of styrene—butadiene mbber. The rosin soap remains in the mbber after polymerization and increases the tack between the pHes of mbber required in the manufacture of tires. 

Schallmoser, K., Rosin, C., Vormittag, R., et al. (2006), Specificities of platelet autoantibodies and platelet activation in lupus anticoagulant patients A relation to their history of thromboembolic disease, Lupus, 15(8), 507-514. 

Within the specific context of this chapter, renewable resources represent the obvious answer to the quest for macromolecular materials capable of replacing their fossil-based counterparts [2, 3]. This is not as original as it sounds, because, apart from the role of natural polymers throughout our history evoked above, the very first synthetic polymer commodities, developed during the second half of the nineteenth century, namely cellulose esters, vulcanized natural rubber, rosin derivatives, terpene resins , were all derived from renewable resources. What is new and particularly promising, has to do with the growing momentum that this... 

History of Naval Stores Production Statistics of Naval Stores Processes of Naval Stores Gum Naval Stores Wood Naval Stores Tall Oil Naval Stores Chemistry of Naval Stores Rosin Turpentine Fatty Acid... 

Natural products derived from conifer oleoresins, particularly those from pine, have been articles of commerce since before recorded history. These oleoresins, which consist of an essential oil and a resin, are the source of turpentine (the essential oil), rosin (the resin), and a host of degraded products of rosin such as tars, pitches, oils, and fossil resins. 

By midnineteenth century, iron boats began to displace wooden boats. This prompted naval stores producers to separate turpentine from oleoresin to meet the growing demand for a paint and varnish solvent. In the 20th century, the demand for rosin in paint and varnish was so great that its production reached 8.7 million pounds in 1900 and over 10 million pounds in 1910, the highest in the history of gum naval stores. Then wood rosin dominated the... 

Until chemistry became a science in the nineteenth century, the history of terpenoids in coatings was not one of steady transformations and improvements but rather a series of uneven lurches and trade-offs. The composition of oleo-resin was a mystery except for the art of separating it into tar, pitch, and turpentine. Practically nothing was known about terpenes, resin acids, and their derivatives. Rosin and other natural resins, e.g., amber, copal, dauri, and Congo, were used to manufacture varnishes through the eighteenth and nineteenth centuries by cooking them plus a drier with linseed oil (Mattiello, 1941-1945). 

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