Patent ID: 7767634
Filing Date: 2010-08-03
Classification: C10M,C10N

Abstract:
1. A process for preparing a lubricating grease composition comprising titanium complex grease which consists of 2-20% by weight of titanium alkaoxide, 2-20% by weight of carboxylic acids other than fatty acids, 5-35% by weight of fatty acids, 0-5% by weight of water, 20-90% by weight of an oil selected from the group consisting of mineral and synthetic oils and 10-60% by weight of conventional soap/grease and 0-10% by weight of additives, comprising the steps of: (a) charging a vessel equipped with a 0-150 rpm stirrer with 5 to 35% by weight of fatty acid, 2 to 20% by weight of carboxylic acid, 20 to 90% by weight of mineral or synthetic oil, 2 to 20% titanium alkoxide and 50% of total oil; (b) agitating the mixture so obtained vigorously for 1-2 hours under a vacuum of 300-500 mm Hg to remove volatile components; (c) raising the temperature of the mixture so obtained to 50-120° C. and continuously mixing at 70-120° C. for 1-2 hours, followed by further raising the temperature very slowly to 120-200° C., maintaining this temperature for 2-6 hours resulting in a product having grease structure and a thickened mass; (d) cooling the product so obtained with continuous stirring to a temperature between 140 to 100° C., adding 0-2% by weight of water and said conventional soap/grease at this stage to the mixture; and (e) further cooling the mixture so obtained to 100-70° C. followed by the addition of the additives and shearing the mixture with the help of a colloid mill or homogenizer.