Cobalt linoleate

The author is unaware of any commerical polymers that are specifically designed to degrade oxidatively, although oxidation may be involved in association with hydrolytic and biological degradation. It may be of interest to note that before World War II products known as rubbones were produced by degrading natural rubber with cobalt linoleate in the presence of cellulosic materials to produce low molecular weight, fluid oxidised natural rubber (Section 30.4). 

The Smuda process also uses new cracking catalysts based on cobalt resinates which are cobalt salts of resin acids (mainly abietic acid) such as cobalt abietate and cobalt linoleate (these are commonly referred to as driers in the coatings industry) and preferably with admixtures of heavy metal silicates. Smuda has also explored the use of manganese resinate deposited on an aluminium oxide support to maximize active surface area [23]. 

Cobalt, Cobalt acetate (ous) Cobalt linoleate (ous) Cobalt naphthenate (ous) Cobalt octoate. Cobalt sulfate (ous) Cobalt tallate Copper linoleate Copper naphthenate. Copper octoate. Copper tallate Erucic acid, 2-Ethylhexolc add. Iron linoleate Iron naphthenate. Iron octoate Iron tallate Lead linoleate Lead naphthenate. Lead octoate. Lead tallate. Lithium drier Magnesium stearate Manganese acetate (ous) Manganese linoleate Manganese naphthenate Manganese octoate Manganese tallate. Menhaden oit Naphthenic add. Nickel octoate Nuact NOPB Prifrac 2990 Rosin-, Sorbitan tallate Strontium drier. Zinc 2-ethylhexanoate Zinc naphthenate Zinc tallate. Zirconium octoate... 

Cobalt linoleate. See Cobalt linoleate (ous) Cobalt linoleate (ous)... 

In one process, natural rubber is milled with a metal soap (e.g., cobalt linoleate) and then masticated in an internal mixer at 80°C in the presence of wood flour (which acts as a surface catalyst for oxidation). The mixture is then extracted with benzene and the solvent is removed by distillation to yield the oxidized rubber as a brittle brown solid. 

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