Finishing Oil Based on Propylene Oligomers

Abstract

Finishing oil based on propylene oligomers decreases fibre end breakage and the amount of wastes, washes out well, and does not negatively affect dyeing. It is recommended for double-twisting machines in the textile industry.Finishing oils are used for processing wool and part-wool yarn on double twisting machines and in oiling agents in manufacture of chemical fibres. The first group includes Konil 6517 (Viskers) (England), Isafil MS-100 from Beme (FRG), and Rokail-8 from Lamberti (Italy). They are manufactured by mixing liquid hydrocarbons with special additives. The second group includes mineral oils of varying viscosity and degree of purification: S-9, S-15, and S-25 according to TU 3810133-75.A number of specific requirements are imposed on finishing oils. They must not worsen the physicomechanical and hygienic properties of yarn and color fastness in dry rubbing, must not have an unpleasant odor and be toxic, must be easily washed out during subsequent treatments, and they must be colorless [1]. In addition, these oils must have good performance properties, i.e., not perturb the industrial spinning process, reduce end breakage, and prevent fibre wear (formation of fluff) and accumulation of electrical charges.Winding of the yarn during twisting is improved when an effective finishing oil is applied as a result of a decrease in the dynamic friction of the fibres against guides and reduce accumulation of static electricity. This will decrease the number of filament breaks, fluff formation, and dust separation.Technology has been developed for manufacturing finishing oil based on hydrogenated polypropylene oligomers -HPO [2]; it consists of oligomerization of propylene and separation and hydrogenation of the required fraction of oligomers. Samples of HPO were treated according to this technology, their physicochemical properties were compared with S-9 and Konil 6517 oils, and the results are reported in Table 1.Oligomerization of propylene was conducted in an autoclave with a stirrer at a temperature of 80°C with an aluminum chloride catalytic complex.The oligomer obtained was washed and several fractions were separated, including the narrow 325-370°C distillate fraction and the >280°C broad residual fraction. The oligomer samples were hydrogenated in a continuous pilot unit in an adiabatic reactor with a volume of 1 liter with 305 g of AP-64 aluminoplatinum catalyst at a pressure of 4.5-5 MPa and temperature of 220-230°C. The Central Scientific-Research Institute of Wool (Moscow) developed the requirements for finishing oil for double-twisting machines and assisted in testing of experimental-industrial samples based on HPO at