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Overview of Blown Castor Oil
Blown castor oil is a honey-golden viscous liquid derived from oxidative polymerization. It is also known as oxidized castor oil or polymerized castor oil. The process of blowing air or oxygen into castor oil at temperatures of 80-130°C results in blown castor oil. This process increases the viscosity of the oil and enhances its compatibility with various resins. Blown castor oil is widely used in industries for its improved adequacy to wet and disperse pigments, as well as its solvent and abrasion resistance properties. It is commonly used in adhesive, heat-set ink, and sealant systems, as well as in plug-valve lubricant base for oil and solvent resistance.
Applications of Blown Castor Oil
Blown castor oil finds various applications across different industries. It is used as a lubricating additive in hydraulic fluids to improve their performance. In the leather industry, blown castor oil provides flexibility and permanence to leather materials. It is also used as a polish on wood and metal surfaces to give them a glossy appearance. Blown castor oil serves as sealants and caulks due to its flexibility, adhesion, and penetration properties.
Product Specifications and Varieties
Blown castor oil comes in different specifications and varieties to suit specific requirements. The product’s appearance is a pale golden yellow color, and it has a viscosity range of 10-250 poise, depending on the buyer’s needs. The acid value of blown castor oil ranges from 5 to 25 mg KOH/gm, while the iodine value is between 60 and 80 (Wijs). The saponification value falls within the range of 190–230 mg KOH/gm, and the specific gravity ranges from 0.98 to 1.02 (at 30 °C). The hydroxyl value of blown castor oil is typically between 130 and 150 mg KOH/gm.
Different viscosity grades of blown castor oil are available, including 9-10 poise, 30 poise, 45-55 poise, 60-80 poise, 90 poise, and 500-600 poise. The viscosity grade chosen depends on the specific application requirements.
Related Products and Industrial Use
Blown castor oil is often packed in drums, IBC tanks, or ISO containers for storage and transportation purposes. It finds extensive use in industries such as adhesive manufacturing, lubrication, inks, polish production, leather dressing, hydraulic fluids, and rubber compounding. The unique properties of blown castor oil make it a suitable choice for these applications. It can act as a plasticizer in paint, varnish, printing ink, and sealants, while also providing non-drying properties
FAQs
What is blown castor oil?
Blown castor oil is a honey-golden viscous liquid derived from oxidative polymerization. It is also known as oxidized castor oil or polymerized castor oil. The process of blowing air or oxygen into castor oil at temperatures of 80-130°C results in blown castor oil. This process increases the viscosity of the oil and enhances its compatibility with various resins.
How is blown castor oil used in industrial applications?
Blown castor oil is used in various industrial applications due to its unique properties. It serves as a plasticizer in paint, varnish, printing ink, and sealants. It is also used in the production of adhesives, lubricants, hydraulic fluids, and leather dressing. Its flexibility, adhesion, and penetration properties make it suitable for these applications.
What are the benefits of using blown castor oil?
Some benefits of using blown castor oil include increased viscosity, improved compatibility with resins, and enhanced pigments wetting and dispersing capability. Blown castor oil also provides solvent and abrasion resistance, making it ideal for applications that require these properties. It is a cost-effective and efficient solution for various industrial needs
Is blown castor oil environmentally friendly?
Blown castor oil is derived from natural castor oil, which is a renewable resource. It does not contain harmful substances and is biodegradable. Therefore, it is considered an environmentally friendly option for various applications. Blown castor oil offers a sustainable alternative to conventional chemical additives.
