Cobalt naphthanate

NOV/AR/AL Cobalt Naphthanate (6%). Novolac Cycloaliphatic/ Aromatic Amine 1.82 1 8-9 203-229... 

Health hazards (mostly allergens) observed with UP composites are usually either due to non-crosslinked UP, mainly due to remnants as mentioned previously (such as, styrene, cobalt naphthanate, phthalates or tricresyl phosphate, benzoyl peroxide and other catalysts) or to the under-cured resin (i.e., UP automobile repair putty). Benzoyl peroxide is known to be a strong skin irritant [70]. 

Solvents are used to carry dissolved or suspended resin and evaporate from the coating after application. Additives in small amounts are used as mildew inhibitors (cuprous compounds), surface-drying additives (manganese and cobalt naphthanates), and barrier-forming additives to protect the resin from heat and UV degradation. Fillers (talc and mica) decrease the permeability of oxygen and water in the coating. 

Example 9.3. Oxidation of cyclohexane [63-65]. Air oxidation of cyclohexane to a mixture of cyclohexanol and cyclohexanone is an important step in a process for production of adipic acid and caprolactam. The reaction is carried out in the presence of a small amount of a cobalt salt (typically naphthanate or 2-ethylhexanoate) at 140 to 165° C and moderate pressure (e.g., 10 atm). The primary reaction product is cyclohexyl hydroperoxide ... 

Commercially, cyclohexane is oxidized to a mixture of cyclohexyl hydroperoxide, cyclohexanol, and cyclohexanone at 3.5-19 X 10 kP and 400-450 K using a cobalt(II) naphthanate catalyst. The hydroperoxide in this mixture is then decomposed to cyclohexanol and cyclohexanone with a second cobalt catalyst. Adipic acid, the desired end-product of cyclohexane oxidation, is produced by oxidation of the mixture of cyclohexanol and cyclohexanone with 40% HNO3 containing 0.2% of a catalyst consisting of ammonium metavanadate and copper turnings. 

Alkyd resins undergo autoxidation after application, which results in a buildup of molecular mass, improving the coating s protective properties. Autoxidation is catalyzed by the addition of small amounts (0.5%) of metal driers, such as cobalt, in the form of a metal naphthanate or octoate. The activity of the metal drier is inhibited by the presence of amine and by hydration in aqueous systems. 

Cobalt and manganese naphthanates aid to surface and thorough drying... 

Phenylmercury, zinc, cuprous compounds mildew inhibitors Cobalt and manganese naphthanates aid to surface and thorough drying Zinc oxide protection of the resin from heat and sun... 

Naphthalene chloride - 692 Naphthalene, sulfonated - 402,409 Naphthalenesulfonic acid - 402, 409, 692 Naphthalenesulfonic acid, with sulfuric acid 661 Naphthanates of lead, cobalt, manganese - 530 Naphthenic acid 201, 363, 393, 436, 530, 531, 622, 692, 760, 832, 855 Naphthols- 157... 

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