Rubber reclaimed

Rubber Reclaimers Association (RRA) cure test recipe for mixed elastomer and NR reclaim cured 20 min at 141°C. 

Le Beau, D.S., Basic reactions occurring during rubber reclaiming. II. The influence of solvent naphtha, storage of reclaim and aging of scrap prior to reclaiming, and infrared spectra of natural rubber reclaim. Rubber Chem. TechnoL, 22, 560, 1949. 

Al-Malaika, S. and Amir, E.J., Thermoplastic elastomers Part III—Ageing and mechanical properties of natural rubber-reclaimed rubber/polypropylene systems and their role as solid phase dispersants in polypropylene/polyethylene blends, Polym. Degrad. Stab., 26, 31, 1989. 

Rubber reclaiming, 27 473 476, 784—785. See also Rubber recycling oils and processing aids for, 27 472t Rubber recycling, 27 461—480, 784—785. See also Rubber reclaiming asphalt modification, 27 467—469 civil engineering market for,... 

Explosion Unit Operation (See also "Explosive Disintegration"). The explosion technique has been applied successfully for the modification of substances and for separation of components, as well as for size reduction of materials. This method has been used in rubber reclaiming, wood pulping, manufacture of fiber board, pulverization of minerals and coal and finally for the prepn of puffed cereals... 

Aplastic rubber cement which resists most acids may be prepd by dissolving, with gentle heating and stirring, 1 p of rubber (reclaimed) or caoutchouc in 2 ps linseed oil and then adding 1 p of clay... 

Cumene Hydroperoxide is used as a catalyst for free radical reactions, such as polymerization as a vulcanization accelerator in rubber-reclaiming flotation and as a poly-... 

Rubber Reclaim. For the traditional rubber "reclaim," crumb rubber is mixed with water, oil, and chemicals and heated under pressure, thus rupturing the carbon-sulfur bonds that cross-link the molecular matrix. The resulting partially devulcanized rubber may be formed into slabs or bales and shipped to manufacturers who process and vulcanize it for use as an alternative to virgin rubber to use in tires or to make mats and other rubber products. 

Because of the increased use of synthetic materials in making new tires after World War n, the reclaim industry has dramatically decreased in size. During World War n, about 60 percent of the rubber in tires was reclaimed rubber. Each of the major tire manufacturers has discontinued operating reclaim plants in the last 8 to 10 years, until now only about one to 2 percent of the raw material for tires is reclaim. There are currently only two companies that produce reclaim rubber, i.e., partially-devulcanized rubber, from whole tires for use in tires and other rubber products. These companies are Midwest Rubber Reclaiming Co. in East St. Louis, Illinois and Rouse Rubber, Inc., in Vicksburg, Mississippi (22). 

Muraoka Rubber Reclaiming Co. Ltd, Ichikawa, Chiba-ken, Japan... 

Use Paint vehicles, source of rosin, alkyd resins, soaps, cutting oils and emulsifiers, driers, flotation agents, oil-well drilling muds, core oils, lubricants and greases, asphalt derivatives, rubber reclaiming, synthesis of cortisone and sex hormones, chemical intermediates. 

Use Paints, waterproofing paper, rubber reclaiming, varnishes, stains, ore flotation, cattle dips, insecticides. 

Rubber reclaiming or recycling is nearly as old as the rubber industry itself. In the early 1900s rubber was... 

Platens, except printers solid or covered rubber Plumbers rubber goods Pontoons, rubber Printers blankets, rubber Printers rolls, rubber Prophylactics, rubber Pump sleeves, rubber Reclaimed rubber (reworked by manufacturing processes)... 

B-. [Midwest Rubber Reclaiming] Reclaimed rubber used in carcass, sidewall, and umtertiead oS passenger. It truck, and oif-road tires, and general purpose mech. goods. 

S.A.G. [Midwest Rubber Reclaiming] Fiber reclaimed from tires used for reinforcement in mud flaps, truck bed liners. 

Acidic carbons appear somewhat more effective than alkaline carbons for GR-S reclaim. However, the pH of a carbon had little effect on the activity of a carbon for natural rubber reclaim. 

Up to the time of World War 11, scrap tires contained only natural rubber. Reclaiming processes were well established, and a reasonable proportion (20%) of reclaim was accepted in compounding of new tires. (Frequently, the percentage was much more in other rubber products.) In 1941 the consumption of reclaim was 32% of the consumption of new rubber. 

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