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Bernard DELMOND: Director of Research at the Centre national de la recherche scientifique (CNRS) Institut du Pin (LCSV) - Université Bordeaux -1
INTRODUCTION
Natural resins are secretion products of many plants; shellac, secreted by the insect "Coccus lacca", is an exception due to its animal origin. Under this name, we find substances exuded by plants in the form of resins, oleoresins, gums, balsams or latex. They are either harvested from living plants (natural harvest resins), pine resin being one of the most representative, or collected in a fossilized state in the soil (natural fossil resins).
In the past, natural resins were used in a wide variety of applications (paints, varnishes, lacquers, printing inks, paper sizing agents, polymers, foodstuffs, pharmaceuticals, perfumes, etc.); however, due to growing demand, production costs and supply problems, the various user industries have increasingly turned to synthetic substitutes. Today, however, even if the use of natural resins is declining, some of them are still of industrial importance, thanks to their quality for specific applications.
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Natural resins
Definitions and classification
Bibliography
Websites
The Botanical Dermatology Database
http://www.bodd.cf.ac.uk/index.html
Center for New Crops and Plant Products; Purdue University
http://www.hort.purdue.edu/newcrop/SearchEngine.html
The...
Standardization
American Standards for Testing and Materials (ASTM)
- Standard test method for acid number of navals stores products including tall oil and others related products - D 465-01 -
- Standard test method for saponification number of navals stores products including tall oil and others related products - D 464-95 - (1999)
- Standard test methods for softening point of resins derived from naval store by ring-and-ball...
Organization
Plant Substances Chemistry Laboratory – Institut du pin.
Université Bordeaux - 1 – e-mail [email protected]
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