Styrene rubber, asphalt

Diphenyl sulfone Styrene diluent, rubber Asphalt Pyrophyllite diluent, slate pencil Pyrophyllite... 

Other additives. Amorphous polypropylene, waxes and asphalt can be added to decrease the cost of BR formulations. On the other hand, PIB can be blended with NR, styrene-butadiene rubber, EVA and low molecular weight polyethylene to impart specific properties. 

The dithiocarbamates have the pentacoordinate binuclear structure (44). The diamyl- and diethyl-dithiocarbamate complexes have been found to inhibit the hardening of asphalt, but the effect appears too weak to be useful.127 The latter complex is an effective antioxidant for polyethylene,128 polypropylene,129 polystyrene,130 poly(methyl methacrylate)130 and an isoprene-styrene copolymer.131 The di-n-butyldithiocarbamate complex is important in the vulcanization and injection moulding of rubber,132 as a stabilizer against photolytic and thermal degradation. 

SBR—see styrene-butadiene rubber. SC asphalt—see cutback asphalt. 

Rubber tyres are by far the most visible of rubber products. Identification is trivial and collection is well organized. Recycling and disposal, however, are less evident. A major route for tyres is their use as a supplemental fuel in cement kilns. Major compounds in tyres are styrene-butadiene rubber (SBR), synthetic and natural polyisoprene rubber, steel cord, carbon black, zinc oxide, sulphur and vulcanization-controlling chemicals. Tyres can be retreaded, which is economic for large sizes (truck tyres), or ground to crumb or powder (cryogenic grinding). Such materials have some limited market potential as an additive in asphalt, and in surfaces for tennis courts or athletics. 

SR-7475. [Firestone Syn. Rubber] Buta-dbne-styrene cqpolymer rubber blend-aUe modifier for thermoplastic resins and asphalt... 

Butyl rubber was and is enormously successful both technolc cally and in the business sense. But other Sparks inventions and coinventions also were commercially successful. Examples are styrene-isobutylene copolymers as coating for paper and paper milk bottles, styrene-isoprene copolymers as artificial leather, colored asphalt paving materials, oxo alcohols, and oxo ester plasticizers. During his brief period of employment as a research supervisor at USDA s Northern Regional Research Center, Peoria, Illinois, Dr. Sparks initiated work on dimer acids... 

Styrenic block copolymers (SBC) are the largest volume TPE used today. Approximately 2 billion pounds were consumed worldwide in 2010. The reason that it has such a high consumption rate is because it is not only used by the rubber industry, but also by the adhesives industry in hot melt adhesives and as an additive with asphalt in road construction. The footwear industry also uses very large quantities of SBC, where it is the preferred rubber. 

A gel made of a thermoplastic styrene-butadiene rubber (SBR) to which asphalt is added is also reported to be a shape memory material [8]. A small amoimt of SBR forms 3D networks in which a large amount of asphalt forms a phase separated structure (both components form co-continuous phase). When this gel is deformed at a low temperature, the plastic deformation of asphalt, which is much harder than SBR, dominates... 

Thermoplastic rubbers (TPR) are a type of rubber produced by polymerization of a mixture of substances, such as butadiene and styrene. They have some advantages over conventional rubbers. The advantages are (a) the material can be melted and easily molded and (b) the chemical composition can be varied to improve or to produce a material with new properties with a wider range of use. Styrene-butadiene-styrene (SBS) polymer is conunonly used as a modifier in the manufacturing of asphalt-based roofing materials. 

Latex is a stable dispersion of a polymeric material (Table 8.13) in an essentially aqueous medium. An emulsion is a stable dispersion of two or more immiscible liquids held in suspension by small percentages of substances called emulsifiers. In the adhesives industry, the terms latex and emulsion are sometimes used interchangeably. There are three types of latex natural, synthetic, and artificial. Namral latex refers to the material obtained primarily from the rubber tree. Synthetic latexes are aqueous dispersions of polymers obtained by emulsion polymerization. These include polymers of chloroprene, butadiene-styrene, butadiene-acrylonitrile, vinyl acetate, acrylate, methacrylate, vinyl chloride, styrene, and vinylidene chloride. Artificial latexes are made by dispersing solid polymers. These include dispersions of reclaimed rubber, butyl rubber, rosin, rosin derivatives, asphalt, coal tar, and a large number of synthetic resins derived from coal tar and petroleum. ... 

---