| 摘要 |
Emulsifiable oxidised polypropylene waxes having molecular weights from 1,000 to 8,000, ASTM ball and ring softening points of at least 130 DEG C. and acid numbers 2 to 20 are prepared by reacting a non-emulsifiable polypropylene wax of above molecular weight and softening point, a density of at least 0,90 and a zero acid number with oxygen at 100-200 DEG C. until the product has an acid number of 2-20. The oxygen may be supplied by air, hydrogen peroxide or an organic peroxide while an alkali metal carbonate, e.g. sodium carbonate and other natural or synthetic waxes may also be present. The reaction mixture may be extracted with a solvent or may be heated under vacuum after the oxidation process. Specification 852,431 is referred to. |
