The second component “b” (ECL value 16.25) in the multibranched-chain fatty acids, separated earlier from whale oils, was identified by gas-liquid chromatography as 2, 6, 10, 14-tetramethylpentadecanoic acid, which was synthesized from phytol and confirmed by means of infrared absorption, high resolution nuclear magnetic resonance, and mass spectrometry. It is estimated that this acid in the fin whale blubber oil used in this investigation corresponded to approximately 0.05% of the total weight of fatty acids. The acid also existed as a constituent of the oils from sperm whale blubber as well as blue whale bone and sei whale blubber, as previously reported.
Storage tests were carried out on commercial confectioner's fat containing coconut oil, at-20, 5 and 30°C for 12 months. while the confectioner's fat stared at-20 and 30°C showed no anychange during the 12 months, that stored at 5°C became rancid in 23 months and its acid valueincreased. 1) Samples stored at 5°C began to generate peculiar rancid odor characteristic of coconut oil after about 2 months and the acid value increased. This rancidity became stronger with increasingcontent of coconut oil and with increasing degree of hydrogenation. 2) There was no change in P.O.V. and the Co.V. was higher inthe samples stored at 30°C. 3) Acidity of the distillate from steam distillation of the samples stored at 30°C was almostthe same as that of the original sample, but that from the sample at 5°C was distinctly higher and the distillate did not contain oily matter which suggests the presence of a lower acid. Therefore, the distillate from vacuum distllation of samples stored at 5°C was examined by gas chromatographicanalysis and the products detected were C4, C6, C8 and C10 acids, with the largest amount far C4acid, This fact suggests that the rancid odor is due mainly to these acid.
Authors investigated the effect of emulsifiers on the properties of asphalt emulsions of commercially practice composition. The purpose of the work reported here was to study the effect of emulsifiers on viscosity and stability of asphalt emulsions stabilized by cationic emulsifiers. Fire different emulsifiers such as higher alkyl polyamines and quaternary ammonium salts, and two kinds of asphalt, pen 100/110 and pen 310/320, which have been used commonly in Japan wereused in this experiment. Asphalt emulsions were prepared by Hurrell type homogenizer. The emulsifier concentrations used varied from 0.5 to 1.5 wt% and the asphalt contents in emulsions were in the range of about 5565 wt%. Viscosity measurements were carried out with Brookfield Synchro-lectric Viscometer. Stability measurements was based upon JIS K 2208 (1961). The result obtained were as follows : 1) Increase of asphalt content above 60 wt%rised remarkably the viscosity of emulsions. 2) Viscosity of emulsions depended upon kinds of asphalt used;pen 310/320 asphalt was generally more susceptible to the influence of asphalt content as compared with pen 100/110 asphalt, showing higher viscosity. 3) The equation of Eilers : ηrel= [1+2.5/2 (1-Hφ)] 2 was well applied to the viscosity of cationic asphalt emulsions, showing H values generally pen 310/320>pen 100/110. 4) Facility of emulsifications in two kinds of asphalts resulted in general as pen 310/320>pen 100/110, while emulsion stability showed similar tendency. 5) It seems difficult to foresee the adaptability as emulsifiers from estimation of surface tension and interfacial tension.
Metal salts of new type amphoteric surface active agents were incorporated into polyethylene by extruding and other molding methods, and the properties of these metal salts as internal antistatic agents were studied. The antistatic property was evaluated by surface resistivity, charge generation, Dirt Chamber Test and Static Honestometer Test. These metal salts did not bleed out on the surface of incorporated sheets and films, and exhibited an excellent antistatic property as internal antistatic agents for low and high density polyethylene.The antistatic property of sheets and films was diminished by washing, but recovered soon to theoriginal.