Whole tire reclaim

In this series of experiments, whole tire reclaim rubber was ground to a particle size of 40 mesh (about 420 pm) and the surface of the ground crumb rubber was then devulcanized. The surface devulcanization was carried out in 2-butanol under the conditions of time, pressure, and temperature specified in Table 3. Then, the samples of surface devulcanized reclaimed rubber made were analyzed by a thermogravimetric... 

Reinforcing Agents. To increase the cohesive strength of an unsaturated rubber adhesive, carbon black is the material of choice. It must be added to the rubber in an internal mixer or on a two roll mill before the rubber is dissolved in the solvent. Such additions do, of course, stiffen the dried adhesive, and some softener may be required to balance this, though this could adversely affect adhesive performance. Carbon black used to be added by means of whole tire reclaim but, as noted in the introduction, the practice is declining. 

Zinc oxide dispersion 10 10 Whole tire reclaim 100... 

Whole tire reclaim Surfactant Caustic potash Ester gum Clay... 

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). 

Styrene-Butadiene Random Copolymer, 25% (wt) Styrene (SBR) Styrene-Butadiene Block Copolymer, about 25% Styrene (YSBR) Cis-1,4- Polyisoprene (Natural Rubber NR, Also Made Synthetically IR) Cis-1,4 Polybutadiene (BR) Polychloroprene (CR), Neoprene Butadiene-Acrylonitrile Random Copolymer, Variable % Acrylonitrile (NBR) Reclaimed Rubber (Whole Tires) (Mainly NR and SBR)... 

A mechanical or reclaimator process (LaGrone, 1986 Szilard, 1973 Klingensmith, 1991 Leyden 1991) has been used for the continuous reclaiming of whole tire scrap. Fine mbber crumb (typically 30 mesh) mixed with various reclaiming oils is subjected to high temperature with intense mechanical working in a modified extmder for reclaiming the mbber scrap. 

A mechanical or reclaimator process [25, 32-34] has been used for the continuous reclaiming of whole tire scrap. Fine rubber crumb (typically 30... 

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