Linseed oil, emulsions

Closely related to films are paints. Previously linseed oil, thinned with turpentine, fornted the film into which were imbedded pigments. Turpentine, from pine trees, is still used, but competes with a petroleum distillate (less smelly). Water-based latex paints are a water emulsion of an organic paint that is thinned with water. 

Similar emulsions can be made by replacing the benzene with carbon disulfide, linseed oil, or turpentine. 

Obtain a sample of mixed lead paint and also one of raw linseed oil. To 20 cc. of the mixed paint in a bottle, add 70 cc. of water in 5-cc. lots, shaking vigorously after each addition. This emulsion will contain about 72 per cent of water, and oil is the external phase, as will be shown by a drop test. 

A study on the influence of the viscosity of the dispersed phase in the preparation of emulsions of vegetable oils (olive, soyabean and linseed) in water with US assistance revealed that replacing the oil with the highest viscosity and interfacial tension — olive oil — with soyabean oil, which has slightly lower viscosity and interfacial tension, caused virtually no reduction in droplet size. Linseed oil, with much lower viscosity and interfacial tension than olive oil, exhibited a much smaller Sauter diameter than the latter viz. 0.47 (xm versus 0.62 pm). Breaking low-viscosity droplets requires less vigorous cavitation shock waves than breaking more viscous ones [49]. 

Note Use of linseed oil in paints has decreased sharply since the introduction of emulsion paints. 

Figure 6.9. Mechanical stability of emulsions stabilized by (a) the anionic surfactant sodium dodecylbenzene sulfonate, and (b) the nonionic surfactant linseed oil fatty acid monoethanolamide ethoxylate (13 EO). The initial droplet sizes are given on the figures. Increase in droplet size on shearing is a sign of coalescence. The decrease in droplet size for the 7 pm droplets of part (b) reflects shear-induced disintegration of the large aggregates formed. (From G. Ostberg et al.. Prog. Org. Coatings, 24, 281 (1994) Reprinted with permission from Elsevier Science)...

The copolymerization between vinyl monomers and drying oils was studied in the past and some vinyl acetate/linseed oil copolymers were synthesized by Cristea et al. [12]. In their work, the emulsion polymerization was performed using a... 

Low-molar-mass poly(butadiene) oils with 80%-97% cw-1,4 contents are produced with other Ziegler catalysts (for example, cobalt compounds with alkyl aluminum chlorides or nickel compounds with trialkyl aluminum and boron trifluoride-etherate). The products have few cross-links and dry as fast as wood oil and faster than linseed oil. Conversion of the poly (butadiene) oils with 20% maleic anhydride gives air-drying (air-hardening) alkyd resins. Modified poly (butadiene) oils stabilize erosion-endangered soils. Because of its low viscosity, the aqueous emulsion penetrates the surface soil layers. The surface crust is reinforced by an oxidative bonding process. Since no skin is formed on the soil crust, the aqueous absorption characteristics of the soil are retained. 

Glazing - Linseed oil based putties were extensively used in the past for glazing applications. Newer glazing sealants include polysulfide, silieone, and acrylic emulsion. Butyl tape, polysulfide and silicone sealants are used in the manufacture of insulated glass. Safety glass door and window panels ean be made by sandwiching a layer of polyvinyl butyral film between two layers of glass. 

Uses Emulsifier, mold release agents based on rapeseed oil, castor oil, linseed oil, sunflower oil, and corn oil Features Stable emulsion after dilution Properties Liq. dens. 0.99 g/cm vise. 600 mPa.s flash pt. 85 C Use Level 3-6°/o w/v to oil-in-water emulsions... 

C 300 P2 Tylopui C 1000 P2 emulsifier, linseed oil/water emulsions Tallicin KO... 

Lonzest SOC Lumisorb SSO Montane 83VG Nissan Nonion OP-83RAT Notable SO-902 Notable SO-992 Protachem SOC RheodolAO-15V Emulsion C-340 Slip-Ayd SL 555 S-Nauba5021 8016-11-3 Edenol B316Spezial Epoxidized linseed oil 8016-28-2... 

Modes of Application.—Internally —Dissolved in linseed, olive, or other fixed oil beaten into an emulsion with yolk of egg (one yolk to every two drachms of oil of turpentine) or Enema Terebinthinm. Externally —As a... 

The oriental lacquer is prepared from the sap of the varnish tree" Rhus verni-ciflua, which is an emulsion of an aqueous phase and an organic phase called urushi-ol. The urushi fraction consists of a mixture of catechol derivatives substituted in 3-po-sition with aliphatic C- 5 or C- 7 side chains. About 60% of these side chains are trie-nes. The structure of the trienes is similar to that in linseed or tung oil and is essential for the effectiveness of the oxidative curing of oriental lacquer. We have utilized new techniques and used combinations of modern techniques to analyze the urushiol mixtures and to characterize and identify each individual compound. We have also developed ultraviolet stabilizers for oriental lacquer, stabilizers that could be incorporated into the polymerizing mixture during the curing process to result in ultraviolet stabilized oriental lacquer. 

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