Preparation of emulsions from functionalized waste polyethene waxes and their applications on wood and leather
Pyrolysed waste polyethene waxes were functionalized under nitrogen condition by maleinisation process with maleic anhydride, and the product was then esterified with ethylene glycol and glycerol, in the absence of any catalyst. The melting points of the maleinated and esterified waxes were in the range of 48-78 ºC. Viscosity measurements of the maleinated and esterified waxes showed decreased molecular weights of the waxes as the temperature and time of pyrolysis of the waxes increased. The esterified waxes were further compounded with toluene, oleic acid, morpholine and distilled water to produce the emulsions. The emulsions produced were applied on wood and leather, which adhered and dried. The coated substrates showed decrease in water absorption coefficients compared to the uncoated surfaces. Coated leather showed better marking-off properties than the wood coated substrates. The emulsions applied on wood finishing show good absorption properties which can be used as undercoat emulsion for wood.
Keywords: emulsions; esterification; maleinisation; marking-off properties; water absorption coefficients
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