Messin around with magazines again.
And on the job no, I try not to take plenty of chances.
3rd order biotic activity:
Goods in which respiration processes (external respiration) are suspended, but in which biochemical, microbial and other decomposition processes still proceed, such as
Styrene butadiene rubber (SBR)
-40 – 100°C
Tire industry (treads and carcasses), conveyor belts, seals, technical rubber products
Polybutadiene rubber (BR)
-80 – 90°C
Tires, conveyor belts, clutches, engine bearings, technical products of all types, drinking water seals
Isoprene rubber (IR)
-40 – 130°C
Technical products of all types, especially construction sections, cooling and heating hoses for vehicles, high-performance tires, foodstuffs utensils
Acrylonitrile butadiene rubber (NBR)
Operating temperature: up to approx. 110°C
Motor vehicle parts, oil and fuel hoses, technical products of all types, plates and mats, rollers, seals and for foodstuffs such as milk
Chloroprene rubber (CR)
-40 – 110°C
Conveyor belts, clutches, drive belts, technical products of all types, pneumatic suspension systems, cables
Butyl rubber (IIR)
-40 – 150°C
Automotive hoses, tire inner liners, seals, membranes, rubberized fabrics, steam hoses, cable insulation
The rubber begins to flow and ruptures the wrapping. The material begins to stick or combine with the packaging. Further consequences of excessive temperatures are softening and artificial aging, combined with hardening. In this event, the recipient has to pick over the blocks in a separate operation.
exposure to sunlight of longer duration, oxidative cross-linking on the surface the rubber
even at temperatures of 10 – 20°C (premature aging).
UV radiation also causes this degradation.
Although a small portion of the nation’s butadiene has been produced from alcohol, all Texas butadiene has been petroleum-derived. Postwar butadiene plants in Texas included Humble Oil and Refining (Baytown), Neches Butane Products (Port Neches), Sinclair Rubber (Houston), and Phillips Petroleum Company (Borger). Postwar styrene plants included Dow Chemical Company (Freeport) and Monsanto (Texas City). Styrene is important in plastics as well as synthetic rubber. The plant at Texas City was destroyed in the Texas City Disaster of April 1947 but was subsequently rebuilt by Monsanto. An additional type of synthetic rubber, butyl rubber, has been made in Texas. This special-purpose rubber is made at temperatures of 150° or more below zero from isobutylene and isoprene, both petroleum-derived. In postwar Texas, Humble Oil and Refining Company (now Exxonqv) manufactured butyl rubber at Baytown. The carbon black industry of the state has been closely and directly related to the rubber industry, and its expansion has paralleled that of synthetic rubber. More than 90 percent of the nation’s carbon black has been used in rubber production. By 1970, Texas led the nation’s production. Another compound used in making Buna-S rubber was the petroleum-derived mercaptan produced by Phillips Chemical Company at Borger.
Total production was around 8,100,000 metric tons (8,900,000 short tons) in 2006.
The most common use (70%) of carbon black is as a pigment and reinforcing phase in automobile tires. Carbon black also helps conduct heat away from the tread and belt area of the tire, reducing thermal damage and increasing tire life.
Carbon black has been used in various applications for electronics. As a good conductor of electricity, carbon black is used as a filler mixed in plastics, elastomer, films, adhesives, and paint.