Xem 1-15 trên 15 kết quả Flame retardancy
  • Chlorinated paraffins are one of the last classes of chlorinated compounds that are still being produced worldwide and used in high quantities in many applications. They are particularly used in cutting oils in the metal industry, but also as lubricants, plasticizers, flame retardants and as additives in adhesives, rubber, paints and sealants. This volume covers the state-of-the-art of methods for the synthesis and analysis of chlorinated paraffins. Experts in the field provide an overview of their worldwide occurrence and utilization and describe their toxicological properties.

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  • Chlorinated paraffins are one of the last classes of chlorinated compounds that are still being produced worldwide and used in high quantities in many applications. They are particularly used in cutting oils in the metal industry, but also as lubricants, plasticizers, flame retardants and as additives in adhesives, rubber, paints and sealants. This volume covers the state-of-the-art of methods for the synthesis and analysis of chlorinated paraffins. Experts in the field provide an overview of their worldwide occurrence and utilization and describe their toxicological properties.

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  • Hexabromobenzene (HBB) has been used as a flame retardant in polymers, plastics, textiles, wood and paper. Its primary uses have been reported in the plastics, paper and electrical industries (Bruchajzer et al., 2004). U.S. production/import volume was listed as 10,000- 500,000 pounds for 1998, but no information is available beyond that time (U.S. EPA, 2002). In addition to its use as a flame retardant, HBB is a thermal decomposition product of octa- and decaBDEs and hexabromobiphenyl (as cited in Bruchajzer et al., 2004).

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  • Wet processing of textiles uses large quantities of water, and electrical and thermal energy. Most of these processes involve the use of chemicals as assisting, accelerating or retarding their rates and are carried out at elevated temperatures to transfer mass from processing liquid medium across the surface of textile material in a reasonable time. So, we can use some natural materials and some physical tools to reduce the chemicals, water, energy and pollution.

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  • This document focuses on the batch manufacture of organic chemicals in multipurpose plants and addresses the manufacture of a wide range of organic chemicals although not all of them are explicitely named in ANNEX 1 of the Directive. The list is not conclusive but includes, e.g. dyes and pigments, plant health products and biocides, pharmaceutical products (chemical and biological processes), organic explosives, organic intermediates, specialised surfactants, flavours, fragrances, pheromones, plasticisers, vitamins, optical brighteners and flame- retardants.

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  • Taking into consideration the outstanding importance of studying and applying the biological means to remove or mitigate the harmful effects of global pollution on the natural environment, as direct consequences of quantitative expansion and qualitative diversification of persistent and hazardous contaminants, the present book provides useful information regarding New Approaches and Prospective Applications in Environmental Biotechnology.

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  • At the open burning sites, some metals were present at concentrations over one hundred times typical background levels for soils, including lead, a highly toxic metal. High levels of other toxic metals, including cadmium and antimony, were also present. Numerous classes of organic chemicals were also present in one or more of the samples, including many halogenated (chlorinated or brominated) chemicals. Many of the compounds identified are intentionally used in electronic devices.

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  • ADC’s ruggedized breakout cables provide factory standard guaranteed performance specifications. They are 100% optically tested and are offered with a variety of optical performance levels. Features: • 245/900 or 500/900 μm polyester buffer • Flame retardant polyurethane jacket • Extremely rugged • Superior abrasion resistance • Excellent performance at extreme temperature • Compatible with all industry standard connectors

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  • ADC’s ruggedized simplex and duplex cables provide factory standard guaranteed performance specifications. They are 100% optically tested and are offered with a variety of optical performance levels.

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  • ADC’s ruggedized high-density cables provide factory standard guaranteed performance specifications. They are 100% optically tested and are offered with a variety of optical performance levels Features: • 245/900 or 500/900 μm polyester buffer • Flame retardant polyurethane jacket • Extremely rugged • Superior abrasion resistance • Excellent performance at extreme temperature • Compatible with all industry standard connectors

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  • ADC's tactical cables provide factory standard guaranteed performance specifications. They are 100% optically tested and are offered with a variety of optical performance levels. Features: • 245/900 or 500/900 μm polyester buffer • Flame retardant polyurethane jacket • Survives repeated abuse, tangling and knots in retrieval • Superior abrasion resistance • Excellent performance at extreme temperature • Compatible with all industry standard connectors

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  • In arid and semi-arid regions, evapotranspiration rates are much higher, recharge is less, flow paths longer and residence times much greater and hence much higher levels of natural mineralisation, often dominated by sodium and chloride, can be encountered. Thus the major ion contents and TDS are often high. In some desert regions, even if groundwater can be found it may be so salty (extremely high TDS) as to be undrinkable, and the difficulty of meeting even the most basic domestic requirements can have serious impacts on health and livelihood. ...

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  • Pentabromotoluene has been used as a flame retardant in polyester and other polymers, latex, textiles, rubbers and plastics. Information on trends in use and production volume is unavailable. No information was identified as to whether it is used as an additive or reactive flame retardant (Fisk et al., 2003). Pentabromotoluene has been detected at low levels in pooled samples of Herring Gull eggs in the Great Lakes basin (Gauthier et al., 2007). Low levels were also found in male plasma and egg yolk of Glaucous Gulls from the Norwegian Arctic (Verreault et al., 2007). ...

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  • Tris(1-chloro-2-propyl)phosphate (TCPP) is an additive flame retardant. It is used extensively in rigid and flexible polyurethane foam. TCPP is also used in thermoset and thermoplastic materials and in textile finishes. Annual U.S. production/import volume was 10-50 million pounds for the reporting years 1990, 1994, 1998 and 2002 (U.S. EPA, 2002). An increased use of TCPP in Europe has been linked to a decreased use of tris(2-chloroethyl)phosphate (TCEP). Studies in Sweden found high levels of TCPP in indoor environments (Marklund et al., 2005).

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  • Licensed local TV services will gain appropriate prominence in electronic programme guide (EPG) listings enforceable through Ofcom‘s statutory code. This will manifest as a high channel number on the DTT platform. The Government anticipates that all local TV services, whether they are licensed under this scheme or carried separately on internet protocol television or video on demand, will have the opportunity of discoverability on the front page of all EPGs.

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