| 摘要 |
A process for the manufacture of an adhesive ethylene vinyl acetate (E.V.A.) based emulsion consists in incorporating E.V.A.-based polymer particles in an organic solvent not degradable by ozone, especially carbon tetrachloride, subjecting the medium to an ozone flow in order to obtain polymer fragments of a molecular weight below 100,000, separating the solid phase, placing it in the presence of an unsaturated carboxylic acid, especially acrylic acid, and heating the mixture to a temperature of between 80 DEG C and 130 DEG C for a period of between two and four hours, with a view to grafting the carboxylic acid on the polymer fragments. The E.V.A. used can be derived from industrial waste, especially from the shoe industry. The process of the invention enables such waste to be reused and eliminates the pollution it represents.
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