Polyurethane plasticizers

About 2 X 10 Ib/year of 1 2 epoxypropane is produced in the United States as an intermediate in the preparation of various polymeric materials including polyurethane plastics and foams and polyester resins A large fraction of the 1 2 epoxypropane is made from propene by way of its chlorohydrm... 

Operating conditions are important determinants of the choice of filter media and sealant used in the cartridges. Some filter media, such as cellulose paper filters, are useful only at relatively low temperatures of 95 to 150"C (200 to 300°F). For high-temperature flue gas streams, more thermally stable filter media, such as nonwoven polyester, polypropylene, or Nomex, must be used. A variety of commercially available sealants such as polyurethane plastic and epoxy will allow fabric operating temperatures up tol50°C (300°F). Selected sealants such as heat cured Plasitcol will withstand operating temperatures up to 200°C (400°F). 

Emmett EA Allergic contact dermatitis in polyurethane plastic moulders. J Occup Med 18 802-804, 1976... 

Most phosgene is used in the manufacture of polyurethane plastics via diisocyanates. 

Adipic acid is mainly used to produce nylon-6,6, a synthetic polyamide used in clothing, in the automobile industry, and in construction it also finds application in polyurethanes, plasticizers, and synthetic lubricants. Manufacture of nylon accounts for 89% of adipic acid consumption in North America, and 55-65% in Western Europe and Japan. 

Toluene for further processing into nitro-, chloro-and isopropyl toluenes for polyurethane plastics, explosives, dyestuffs, antioxidants and plant-protecting agents, and if required, for dealkylation to benzene,... 

Bunge et aK (14) found a mean concentration of 0.0197 ppm of different isocyanates (TDI, MDI, and NDI) in the work environment of a polyurethane plastics laboratory. The concentrations of the different isocyanates are not specified in their paper. 

Exposure Levels in Humans. Certain population groups are known to have a higher risk of exposure to MBOCA than others. The highest exposures are found in workers at manufacturing facilities that use MBOCA in the production of polyurethane plastics (Clapp et al. 1991 Ichikawa et al. 1990 Schulte et al. 1988 Ward et al. 1987). The next highest levels are found in populations that live near facilities where uncontrolled MBOCA releases occur (Keeslar 1986). Specific information on where such releases occur, on the populations living near such facilities, and on the levels to which they may be exposed was not found. This information is needed to assess whether health studies on these populations need to be conducted. 

Corfam DuPont s trade name for a tough, leatherlike, nonwoven sheet of polyurethane plastic fibers. 

POLYURETHANE PLASTIC POLYMER FORMULATION FOR ELEVATED TEMPERATURE FOAMING. 

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