Rubber | chemical compound | Britannica

Rubber. Formed in a living organism, natural rubber consists of solids suspended in a milky fluid, called latex, that circulates in the inner portions of the bark of many tropical and subtropical trees and shrubs, but predominantly Hevea brasiliensis, a tall softwood tree originating in Brazil.

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Development of the natural rubber industry

Rubber - Rubber - Development of the natural rubber industry: If latex is allowed to evaporate naturally, the film of rubber that forms can be dried and pressed into usable articles such as bottles, shoes, and balls. South American Indians made such objects in early times: rubber balls, for instance, were used in an Aztec ceremonial game (called ollama) long before Christopher Columbus ...

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Monsanto

Monsanto, in full Monsanto Company, formerly (1933–64) Monsanto Chemical Company and (1901–33) Monsanto Chemical Works, American corporation that was a leading producer of chemical, agricultural, and biochemical products.

Amazon River - Animal life | Britannica

Amazon River - Amazon River - Animal life: To give a succinct overview of the complete fauna of Amazonia is as impossible as it is to adequately describe the great diversity of its flora; in part this is because many of the region’s species have yet to be identified. The rivers and streams of the basin teem with life, and the forest canopy resonates with the cries of birds and monkeys and ...

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Top 20 Pesticide & Agrochemicals Companies In The World-Awiner

As a large-sized and key enterprise in producing pesticides, Jiangsu Yangnong Chemical Group Co., Ltd. is one of the most advanced chemical enterprises in China. Jiangsu Yangnong Chemical Group Co., Ltd, the Groups subsidiary, is the largest productive base for pyrethroids in China.

Rubber - Protective chemicals | Britannica

Rubber - Rubber - Protective chemicals: Certain additives confer resistance to heat, sunlight, oxygen, and ozone. Amines, particularly paraphenylene diamines, are powerful retarders of oxidation, or antioxidants. Added to rubber compounds in small amounts (1–2 percent), they appear to disrupt the

Rubber - Development of the natural rubber industry | Britannica

Protective chemicals. Plasticizers and processing aids.Vulcanization made the modern rubber industry possible by permitting use of the substance in machinery and in tires for(For the chemical processes underlying vulcanization, see elastomer .) With the advent of the bicycle and, somewhat

Rubber - Additives | Britannica

Rubber - Rubber - Additives: A number of ingredients are added to both natural and synthetic rubber in order to obtain certain desirable properties. By convention, mix formulations begin with the amount of the designated elastomer—for instance, natural rubber (NR), butadiene rubber (BR), or

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Natural rubber

Natural rubber, also called by other names of India rubber, latex, Amazonian rubber, caucho or caoutchouc, as initially produced, consists of polymers of the organic compound isoprene

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