Linseed Oils

Polymerised Linseed oil

Polymerised Linseed oil , also known as Stand oil is generated by heating linseed oil near 300 °C for a specific time period in the complete absence of air. Under these conditions, the polyunsaturated fatty esters convert to conjugated dienes, leading to crosslinking. The product, which is highly viscous, gives highly uniform coatings that "dry" to more elastic coatings than linseed oil itself. The oil has a pale clear colour and extremely high viscosity. It produces a tough, enamel-like, none-yellowing film. Stand oils are generally, manufactured to viscosity specifications. Linseed stand oils may also be used in simple solutions where oil soluble resins are melted into the hot oil without further polymerisation.

Linseed stand oils are used in the manufacture of traditional wood and floor sealing varnishes and in enamels. They are also used in house paints to modify flow, "levelling" of the coat and to improve gloss and durability. Higher viscosity linseed stand oils are used in the production of flat paints and primers. They may also be used in pigment grinding (particularly high acid value types but beware of yellowing). All linseed stand oils impart excellent flexibility, performance and durability to the final product. They are used in Preservatives, oil paints, furniture finish, wood floors, conditioner for natural boar's hair paint brushes, on cricket bats, and softening putty. They are used in the paint industry as it dries much faster than Raw Linseed Oil, in the construction industry in concrete, earthen floors and as additive to glazing putty, as a wood preservative and in the maintenance of wooden articles and tools, as an alternative to solvent-based products designed for sealing, polishing, waxing, varnishing and finishing, in the sports goods industry in the maintenance of sports equipment like Skis, Cricket bats, Baseball bats, Hockey sticks, Archery equipment and Croquet Mallets. Moreover it also finds its use in industrial lubricants, sealants and Printing ink resins among other uses.

Stand oils enhance the flow of the oil paint and enables the brush strokes to be removed. They enhance gloss, are elastic, but lengthen the drying time and can be thinned using turpentine and white spirit. They yellow less than linseed oil but dry even more slowly. Stand oil is suitable for the practice of the glacis technique. Stand Oil or Polymerised Linseed Oil has much higher viscosity and faster drying time than double boiled Linseed oil.

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Raw Linseed Oil

Linseed oil is derived from the seeds of the Flax plant. Linseed oil is yellow in colour. Linseed oil has resolvent properties, thereby making it highly useful for industrial applications. It is a slow-drying liquid with good preservative properties and water resistance. It is generally used outdoors, and can take up to three weeks to dry. It prevents corrosion and dry rot. It has long been used as a drying oil, a vegetable oil which undergoes oxidation and forms a natural, plastic-like film. The reactivity of Linseed oil can be improved by the addition of metal catalysts, called driers, which promote oxidation, and by partially pre-oxidizing the Linseed oil through exposure to the air. It was found that the addition of solvents such as Mineral Spirits, Japan drier, and Turpentine would speed Linseed oil's drying time, making it a more useful product. It is a versatile substance, depending upon how it is processed. It is used in various industries.

Which are summarized below:

• In the Paint industry
• In the Construction industry
• In the Agriculture and Livestock industry
• In the Petroleum industry
• In the Leather industry
• In the Sports goods industry

Uses of Raw Linseed Oil

In the Paint industry

Raw Lin Seed oil is the most commonly used carrier in oil paint. It makes oil paints more fluid, transparent and glossy. For oil-based paints, slow drying is a benefit, since this allows the paint to "level" itself, giving a smoother finish with fewer brush marks. It is also used as a paint thinner.

Linseed oil acts as a paint binder. It 'binds' the other ingredients of the paint together, both while in paste or liquid form, and while drying after use. Paint consists of some kind of coloring agent, usually finely-ground pigments of some mineral. This fine dust needs something to make it wet so it can be spread around, and needs something to keep it uniform, 'floating', so it doesn't all clump up and settle to the bottom. Linseed oil serves this purpose. It seeps into most surfaces or materials it comes into contact with. It helps bind paint to canvas or wood, bind new paint into old paint, and blend one color with a different color very subtly.

In the construction industry

Glazing putty, consisting of a paste of chalk powder and Linseed oil, is a traditional sealant for glass windows. It is used as a preservative for wood, in concrete, in caulking compounds, earthen floors, adobe and sealants. It is also used as a wood finish. It helps wood retain its natural moisture, aids in water repellence, retards cracking, checking and shrinking. It is used as an alternative to solvent-based products designed for sealing, polishing, waxing, varnishing and finishing. It helps to toughen surfaces by penetrating and then hardening even in the layers beneath the surface. Wood treated with Linseed oil is resistant to denting and scratches and is easily repaired. It helps in weather proofing large surface areas. Because of its drying and hardening properties when exposed to air and sunlight, it is also used in the manufacture of Linoleum. The floor covering Linoleum is made of ingredients such as wood dust, pine resin, wood flour, cork particles and other materials which are bound together with Linseed oil.

In the Agriculture and Livestock industry

Linseed oil is used in the maintenance of farm equipments, tools and articles. It is used in the garden for pruning shrubs and trees. It is also used in the making of many animal feeds and animal care products.

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Double Boiled Linseed Oil

Raw Linseed oil is heated and the air is blown to produce Double Boiled Linseed Oil. Heating the oil causes it to polymerize and oxidize, effectively making it thicker and shortening its drying time. It dries more completely and quickly and forms a film on the surface. Double Boiled Linseed Oil is a dark amber coloured oil having a distinctively sharp smell. This oil is mainly used indoors. It is very water resistant, and also a rust inhibitor. It has a high viscosity when compared to Raw Linseed oil.

In the construction industry

DBLO is used as a natural wood preservative and wood finish due to its increased durability, quality of finish and resistance to surface damage. It is used for the maintenance of wooden articles and tools, for interior and exterior use on bare woods (other than oak), as an additive to glazing putty, in concrete, in caulking compounds, earthen floors, and sealants, as an alternative to solvent-based products designed for sealing, polishing, waxing, varnishing and finishing, in the manufacture of Linoleum, in corrosion protection, in pigment pastes, for removing stains, as a sealer for terracotta tiles and stone floors, in stone items, in chrome fittings, flywire screens, in brick work, and preserving galvanised roofs.

In the sports goods industry

In the maintenance of sports equipment like Skis, Cricket bats, Baseball bats, Hockey sticks, Archery equipment and Croquet Mallets.

Other Industrial uses

DBLO is used in foundries. It is used in industrial lubricants, sealants and Printing ink resins, to maintain carvings, wooden boats, canoes, fishing rods and Gun Stocks, etc, by the fire department to treat the wood handles of hand tools that have metal implements to prevent buildup of static electricity, for the protection and preservation of farming tools and equipment.

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