Abstract:
Compounds having isocyanate groups with or without blocking, allophanate groups and free-radically polymerizable C—C double bonds, the C—C double bonds being in activated form by virtue of a carbonyl group attached directly to them or by virtue of an oxygen atom in ether function (activated double bonds), derived from polyisocyanates and alcohols A which in addition to the alcohol group also carry an activated double bond (compounds I). The invention additionally relates to radiation-curable formulations and coating compositions comprising the compounds I, to methods for coating using these substances, and to coated articles produced using these methods. Furthermore, the invention relates to the use of the compounds I in radiation-curable compositions such as in casting compositions, dental compounds, composite materials, sealing compounds, adhesives, troweling compounds, printing inks, in photostructurable compositions such as solder resists, photoresists, photopolymeric printing plates, and stereolithography resins.
Abstract:
Natural rubber products are made from fig tree (Ficus carica) by homogenizing the plants in an acetone/benzene and separating the rubber-containing phase by centrifugation. F. carica contains about 4% (w/v) natural rubber in latex, and 0.3, 0.1 and 0.1 % in bark, leaf and fruit, respectively. Molecular mass of the natural rubber from F. carica is about 128 kD. The latex serum of F. carica contains only a small numbers of proteins, with a 48 kD and a 25 kD protein as major proteins. Similar to Hevea brasiliensis and Parthenium argentatum Gray, proteins participating in rubber biosynthesis of F. carica are tightly associated with the rubber particles. Natural rubber is made using the latex serum and the proteins in latex, leaf, bark, and fruit of F. carica.