Palaquium gutta

Palaquium Gutta which yields Gutta Percha. 

Gutta-percha. The name, derived from Malayan ge-tah pertcha=latex of the percha tree, for a natural rubber (structure, see there) from the gutta-percha trees Palaquium gutta and P. oblongifolia, Sapotaceae) with properties similar to those of balata. In Sumatra, Java, and south east India, the rapidly coagulating latex of incised trees is collected, rapidly kneaded, and marketed as raw G. Pure G. is the all-trans-isorntr of polyisoprene, related to balata molecular mass ca. 100000. In contrast to the cis-isomeric natural rubber, G. is hard and less elastic but not brittle, it softens at 25-30°C, becomes plastic at 60 °C, and melts at >100°C with decomposition and formation of a sticky mass. For uses, see literature. 

A material chemically similar to rubber is gutta-percha, frflns-l.d-poly-isoprene, also obtained as a latex from a tree, particularly Palaquium gutta. 

Gutta-percha and balata are two types of natural trans-polyisoprenes, which comes from such tropical trees as the Palaquium Gutta of Malaysia and the Bolle tree of Brazil, respectively. Because the trans-polyisoprenes are crystalline at room temperature, they form tough thermoplastics. Applications have included golf ball covers and dental materials. 

Guttapercha (transA, 4-Polyisopren, u.a. von Palaquium gutta und Payena spp./Sapotaceae)... 

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