Drying oils curing process

Chem. Descrip. Processed raw linseed oil plus driers CAS8001-26-1 EINECS/ELINCS 232-278-6 Uses Drying oil for paints, conaete curing, conaefe protection Features Drying time 6-12 h... 

A perennial herh with a sturdy, hairy stem, much branched at the top leaves opposite, with fragrant odor when ruhhed up to about 1 m high native to tropical Asia (especially Indonesia and the Philippines) and extensively cultivated in the tropics (Indonesia, Philippines, Malaysia, India, southern China, Seychelles, Brazil, etc.). Parts used are the dried leaves from which patchouly oil is obtained by steam distillation. The leaves are usually subjected to some sort of fermentation or curing process before distillation so as to increase oil yield. Major oil-producing countries include Malaysia, Indonesia, the Seychelles, China, India, and the Philippines. The oil is also distilled in Europe and the United States. 

The amount of FC-248 applied was usually 1.35% product on fabric, but some fabrics needed a larger amount. The drying and curing of the finish was accomplished by either a one- or two-step process. The curing temperature of the one-step process was about 150-180°C [71], FC-248 imparts soil release, oil re-pellency, and limited resistance to water. Like other 3M products derived from perfluorooctanesulfonate, FC-248 has been phased out. 

Air and oil filters are made by a dry-web process in which the filter paper is dried over heated metal dmms. The paper is saturated with the phenoHc resin solution, either off- or on-line, and dried in an oven advancing the resin to the B-stage (semicured). The sheet, containing 20—30% resin, is roUed and shipped to the filter-unit manufacturer, where the sheet is convoluted and the filter assembled and cured to the C-stage (fully cured). 

The Royal (or Royale) process was originally developed as a method for drying timber, in which the wood is heated in oil under vacuum. The temperatures used are low (60-90 °C) compared to other thermal oil treatments, and although sufficient to lead to some curing of the oil itself, there is no direct modification of the wood as a result of this process. The oil does not penetrate the cell wall. In this process, wet timber is placed in a treatment vessel and oil is then introduced, which is heated to the desired temperature, whilst a vacuum is applied. Water is removed from the timber and the vapour is transported away by the vacuum system. When the wood has reached the desired MC, the oil is removed from the treatment vessel. After this, a vacuum is applied to removed excess oil from the wood. Some dimensional stability is imparted to the timber due to the water repellency of the oil. This treatment is marketed by Osmose as the Royale process. 

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