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HBCD is toxic to water-living organisms. The UNEP Stockholm Convention has listed HBCD for elimination, but allowing a temporary exemption for the use in polystyrene insulation foams in buildings. [4] Tetrabromobisphenol A (TBBPA or TBBP-A) is mainly used in printed circuit boards, as a reactive flame retardant.
Foam rubber was first made in 1929, by E. A. Murphy [2] and Eric Owen, two research chemists at Dunlop Rubber, who used whipped latex. In 1937, isocyanate-based materials were first used to make foam rubber. After World War II, styrene-butadiene rubber replaced many natural types of foam. Foam rubber has been used commercially for a wide range ...
Latex allergy is a medical term encompassing a range of allergic reactions to the proteins present in natural rubber latex. [1] It generally develops after repeated exposure to products containing natural rubber latex. When latex-containing medical devices or supplies come in contact with mucous membranes, the membranes may absorb latex proteins.
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Many flame retardants degrade into compounds that are also toxic, and in some cases the degradation products may be the primary toxic agent: Halogenated compounds with aromatic rings can degrade into dioxins and dioxin-like compounds , particularly when heated, such as during production, a fire, recycling, or exposure to sun. [ 22 ]
Hydramethylnon is toxic to fish; the 96-hour LC 50 in rainbow trout is 0.16 mg/L, 0.10 mg/L in channel catfish, and 1.70 mg/L in bluegill sunfish. Hydramethylnon, when fed to rats for two years, led to an increase in uterine and adrenal tumors at the highest dose; therefore, the Environmental Protection Agency classifies hydramethylnon as a ...
These latex-rich environments may sensitize healthcare workers who regularly inhale allergenic proteins. [56] The most prevalent response to latex is an allergic contact dermatitis, a delayed hypersensitive reaction appearing as dry, crusted lesions. This reaction usually lasts 48–96 hours.
To create foam latex, a liquid latex base is mixed with various additives and whipped into a foam, then poured or injected into a mold and baked in an oven to cure.The main components of foam latex are the latex base, a foaming agent (to help it whip into a froth), a gelling agent (to convert the liquid foam into a gel), and a curing agent (to turn the gelled foam latex into a solid when baked).