| 摘要 |
An aromatic vinyl compound, e.g. styrene and methyl styrene, is polymerized with a partly polymerized ester derived from a mixture of alcohols and one or more unsaturated fatty acids containing at least eight carbon atoms, such as can be derived from a drying or semi-drying oil. The alcohols, mono- or polyhydric, saturated or unsaturated, include, glycerol, pentaerythritol, ethylene glycol, cyclohexanol or cetyl alcohol; and the fatty acids may be derived from bodied linseed or dehydrated castor oils. Polymerization may be effected by heat or ultra-violet light, in the presence or absence of solvents and/or water. Catalysts, e.g. benzoyl, tertiary-butyl, phthalic and fatty acid peroxides or, if water is present, potassium persulphate and retarders, such as phenolic and amino compounds, may be used. Driers, e.g. lead, manganese, cobalt and zinc naphthenates or linoleates may be added. In examples, pentaerythritol is heated with bodied dehydrated castor oil and magnesium oxide under reflux in an inert atmosphere and then heated with unbodied linseed or dehydrated castor oil fatty acids at 240 DEG C. for three hours. The products are then heated under reflux with styrene, white spirit and benzoyl peroxide, to give a product which after thinning with white spirit and addition of cobalt naphthenate gives an air-drying film. Specification 630,022 is referred to.ALSO:Partially polymerized esters are derived from a mixture of alcohols, e.g. pentaerythritol, glycerol, ethylene glycol, cyclohexanol, and cetyl alcohol and one or more unsaturated fatty acids containing at least eight carbon atoms in the molecule, such as may be derived from linseed stand oil, or bodied dehydrated castor oil. In examples, bodied dehydrated castor oil is refluxed with pentaerythritol in the presence of magnesium oxide at 200 DEG C. under carbon dioxide, and (1) unbodied linseed oil fatty acids, or (2) unbodied dehydrated castor oil fatty acids were added and heating continued at 240 DEG C. for 30 minutes without the reflux condenser.ALSO:Partially polymerized esters are derived from a mixture of alcohols, e.g. pentaerythritol, glycerol, ethylene glycol, cyclohexanol or cetyl alcohol, and one or more unsaturated fatty acids containing at least eight carbon atoms in the molecule, such as may be derived from linseed stand oil, or bodied dehydrated castor oil. In an example, bodied dehydrated castor oil is refluxed with pentaerythritol in the presence of magnesium oxide at 260 DEG C. under carbon dioxide, and (1) unbodied linseed oil fatty acids or (2) unbodied dehydrated castor oil fatty acids are added and the heating continued at 240 DEG C. for 30 minutes without the reflux condenser.
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