Seatons products for use in paints and varnishes
This page highlights a selection of traditional vegetable oils supplied by Seatons that are valuable raw materials for the surface coatings industry. Seatons also supplies a range of speciality oils, information about which can be found on a separate page.
Refined linseed oil
This product is characterised by its low acidity and pale colour. It has a low viscosity and is an ideal starting material for enamels, varnish media, hard gloss paints and similar preparations. Refined linseed oil may be used as a diluent, replacing a proportion of the solvent.
Acid refined linseed oil
This product is low in viscosity, pale in colour and has an enhanced acidity. The acidity is carefully controlled and the oil is produced to a specific acid value, usually 4. Acid refined linseed oil has excellent wetting properties and is used in pigment dispersion and paint grinding.
Polymerised linseed oil (linseed stand oil)
This product is pale in colour and has a low acidity. It is manufactured to viscosity specifications ranging from 0.8 poise to 800 poise @ 25ºC. Polymerised linseed oil can replace or partially replace refined oils as a starting material in varnish production, where it will help reduce production times. Polymerised linseed oil is used in the manufacture of traditional wood and floor sealing varnishes, and in enamels. It is also used in house paints to modify flow, improve gloss and improve durability. Higher viscosity polymerised linseed oil is used in the production of flat paints and primers. All grades of polymerised linseed oil impart excellent flexibility, performance and durability to the final product.
Oxidised linseed oil (blown linseed oil)
This product is manufactured by the controlled oxidation of linseed oil, resulting in double bonds cross-linking via an oxygen bridge. The oxygen links make oxidised linseed oil very reactive and, consequently, it dries quickly. It is available in a viscosity range from approx. 0.8 poise up to 140 poise @ 25ºC. Oxidised linseed oil is used in flat paints, undercoats, primers and oil bound distempers. Because of its high surface activity, it can be added to paints and enamels to enhance their pigment wetting properties. Oxidised linseed oil can also be used in the manufacture of electrical insulation varnishes and in the preparation of economical high gloss varnishes where colour is unimportant.
Boiled linseed oil
Boiled linseed oil is low in viscosity and available in pale or dark colours. It contains metallic siccatives that improve drying times by catalysing the oxidation process. Boiled linseed oil may be used directly on wood or steel, or used in the manufacture of primers and other fast drying flat paints. It may also be used as a diluent for oil-based paints and for thinning paste colours.
Reduced linseed oil
This product is made from boiled or blown linseed oils and is supplied diluted in white spirit. Pigment (often calcium carbonate) may then be added to the oil, thus making an inexpensive paint, ideal for use in harsh conditions where more expensive paints are quickly spoilt.
Wood oil (tung oil)
Wood oil is available in two grades, natural unprocessed and polymerised. Wood oil contains approx 75% eleostearic acid. This fatty acid is unusual in that it has conjugated double bonds which give rise to the rapid bodying and drying which is characteristic of wood oil. Natural unprocessed wood oil is “cooked” into varnishes, giving high gloss, rapid drying, durable, alkali and water resistant products. Polymerised wood oil can be used as a “chill back” (or “check back”) in varnish production. The dried film of polymerised wood oil is clear and wrinkle free and it may also be used in simple varnishes where resins are merely dissolved into the oil without “cooking”. Wood oil may be used to replace a proportion of refined linseed oil in varnish formulations to increase the water resistance and durability of the film, without losing the flexibility imparted by the linseed oil. Aluminium and similar paints are usually based on wood oil formulations. The alkali resistance of wood oil varnishes makes it ideal in compounds used to coat plaster, concrete and similar basic substrates.This information sheet highlights a selection of traditional vegetable oils supplied by Seatons that are valuable raw materials for the surface coatings industry. Seatons also supplies a range of speciality oils, information about which can be found on a separate information sheet.