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    PBN(D) Rubber Antioxidant Properties Yellow or purple flake crystals,melting point 62℃,flash point 188℃,Specific gravity is 1.16-1.17,slightly soluble in acetone, ethyl acetate, benzene,carbon tetrachloride,ethanol and gasoline.

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    Properties: Light gray powder, the melting point 108 °C, the boiling point 395-399.5 °C, the specific gravity 1.18. extremely soluble in acetone, ethyl acetate, methyl chloride, benzene and carbon disulfide.

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    Rubber Additive Product: Rubber antioxidant D(PBN) Chemical name : N-phenyl-2-naphthylamine Molecular Formula : C 16 H 13 N Specification Item Specification Appearance Pale or Brown powder Melting point ≥ 105.0 Reduction in weight after Heating,%≤ 0.20 Ash,%≤ 0.20 Phenylamine content No blue and purple reaction by testing Screen residue(100 meshes),%≤ 0.2 Magnetic object content

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    OMNOVA is now part of Synthomer, a global specialty chemicals company and one of the world's major suppliers of aqueous polymers. The combined organization creates a US$2.8 billion global enterprise with a broad array of specialty products and services.

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    The formation of free radicals (R.) during polymerization, processing or service of the rubber product is the first stage of polymer degradation and is called as ‘Initiation’ of degradation process. ‘Propagation’ is the second stage when atmospheric oxygen reacts with the free radicals (R.) to form ‘Peroxy’ (ROO.) radicals

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    N ‐phenyl‐2‐naphthylamine was used as an antioxidant in rubber and synthetic elastomers, lubricants and asphalt and as an intermediate for dyes (Falbe and Regitz 1991). Toxic Effects and Mode of Action. The kidneys were the target organ of N ‐phenyl‐2‐naphthylamine after repeated oral administration. After ingestion, uncommon

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    Moreover, the rubber mixtures in some embodiments contain other polar fillers, such as, for example, aluminosilicates, chalk, starch, magnesium oxide, titanium dioxide, or rubber gels. In one embodiment, the rubber mixture is free from other fillers, that is, in this embodiment the rubber mixture comprises 0 phr of any other filler.

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    Much of this in- formation is abstracted from an internal FDA report (ref. 1). Production of the substituted p_-phenylenediamines presently exceeds 70 million pounds per year in the United States. Essentially all of this is used as antiozonants and antioxidants in rubber tires. The three basic types of p_-phenylenediamines are shown in figure 1.

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    1. Breathing zone sample yielded an estimated 8 hour TWA exposure--(9/24/85 plant 1)--Range from 40-70 ppm. 2. Employee breathing zone sample collected before, during and. after pouring, 8 hour TWAs were estimated, based on sample results and estimates of pre-pour, pour and post-pour--(4/14/87 plant 1)-- Range from 9-28 ppm. 3.

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    O’Boy and Dowling, 2009 reported that for the tire belt without the layer of tread rubber, the equivalent bending stiffness is 7.6 N·m with an area density of 14 kg/m 2, while for the tire belt with the layer of tread rubber, the equivalent bending stiffness is 13.6 N·m with an area density of 21.8 kg/m 2.

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