Blown castor oil is a chemically modified castor oil made by passing controlled air or oxygen through refined castor oil at elevated temperatures. This oxidation raises its molecular weight and polarity, giving higher viscosity, more tack, and stronger film-forming properties than untreated castor oil.

The air-blowing (oxidation) process increases viscosity, tackiness, and film strength. Compared with raw or refined castor oil, blown castor oil offers more body, better surface adhesion, and improved resistance to flow under load — making it a functional additive rather than a simple lubricant.

Blown castor oil is used in lubricants and greases, the rubber and tyre industry, printing inks, coatings and varnishes, and adhesives and sealants. It works as a thickener, binder, plasticiser, and viscosity modifier wherever body, tack, and film strength are needed.

Yes. Different blowing levels produce different viscosity grades, so blown castor oil can be supplied to match a target viscosity. Share your required viscosity range and application, and we will recommend the right grade for your process.

It reduces oil migration and bleeding, improves film durability and surface hold, and enhances performance in high-load or slow-moving systems. Because it builds controlled rheology naturally, it can reduce reliance on synthetic thickening additives.

Yes. In printing inks it improves tack, flow control, and film integrity, and in coatings and varnishes it enhances adhesion, gloss control, and film strength. Its strong film-forming behaviour makes it well suited to these applications.

Yes — samples are available for industrial testing, supplied with a Certificate of Analysis per batch. Blown castor oil is packed in 200 kg HDPE drums, with flexitanks or ISO tanks for bulk. MOQ typically starts from 1 MT (Metric Ton), dispatched through Mundra Port, Gujarat, India with full export documentation.

Viscosity and oxidation level are monitored during blowing, and each batch is checked, traced, and documented with a Certificate of Analysis. Controlled processing keeps rheology and adhesion characteristics consistent — important for buyers who depend on predictable performance.

The Patel Brothers is a Rajkot, Gujarat based exporter of castor oil and castor derivatives. We supply blown castor oil with consistent viscosity and quality, customisable grades, a Certificate of Analysis with every shipment, export-ready packaging, and reliable global logistics — backed by responsive support from enquiry through to delivery.