Oil-modified urethanes

One-Package Urethane Alkyd (Oil-Modified Urethanes) Coatings (ASTM Type 1)... 

Hercules PE. [Hercules] Pentaeryth-ritols used in prod, of all d resins, rosin esters, oil-modified urethane resins, drying oils, synthetic lubricants, plasticizers, intumescent paints, plastics, stabQizas for plastics, explosives. 

Super Thane . [Thibaut Walka ] Oil-modified urethanes for varnish triplications, gym floor finishes, industrial enamels, traffic markers. 

Uses Pigment for alkyds, oil-based exterior and interior paints and stains, oil-modified urethanes, alkyd melamines, and other systems Colormatch AD-10306 [Plasticolors]... 

Among these resin fortified oil based paints are included the alkyds, epoxy esters, oil modified urethanes, etc. These paints may be formulated as airdrying or baking types, and with suitable pigments be formulated to be resistant to a variety of moisture and chemical fume environments, as well as application over wood, metal, and masonry substrates. These paints have the following advantages ... 

One-package urethane alkyd (oil-modified urethanes) coatings (ASTM type 1), alternatively called uralkyds. Here, curing takes place by oxidation of the double bonds present in the fatty acid portion of the coating system. 

Figure B.9. Infrared spectrum of an oil-modified urethane resin.

Uses Defoamer for use in oil-modified urethanes and water-reducible alkyds also suggested for acrylic, epoxy, PU, PVAc, and S/B systems Properties Amber cloudy Iiq. fineness (Hegman) > 7 sp.gr, 0,810 0.012 dens. 

From these, prepolymers are prepared where the diisocyanates may be completely reacted as in the case of the urethane oils which resemble the oil-modified alkyds but have urethane (—NHCOO—) links in place of the ester (—COO—) links of the alkyds, or where one only of the isocyanate groups is combined, leaving the other to participate in crosslinking reactions. Such a reactive prepolymer is the biuret that may be prepared from hexamethylene diisocyanate, has the following structure ... 

Materials. The adhesives and primers used in this study were model and commercial materials that were cured according to conditions appropriate for the specific adhesive chemistry. Adhesives A and B were conventional epoxy/Versamid and epoxy/dlcyandiamlde adhesives, respectively. Adhesives C and D were commercial urethane and epoxy/polyamlde adhesives, respectively. Adhesive E was a conventional two-part epoxy/amldoamlne adhesive. Adhesive F was a vinyl plastlsol adhesive. The adhesive primers used in this study were a urethane crosslinked epoxy electrocoat primer and spray primers based on tall oil modified epoxy ester, and polyesterpolyol/isocyan-ate chemistry. Dicyandlamlde was obtained from Aldrich Chemical Company. Epon 828 was obtained from Shell Chemical Company. 

Uses Urethane for waterborne coatings with exc. gloss, mar resist., and hardness in one-package system Features Oil-modified... 

Using a mixture of castor oil and hydroxyether of bisphenol-A (HBA) as the polyol and reacting with TDI in the presence of DBTDL catalyst at 35°C, a series of polyurethanes are prepared in an air-circulating oven for 48 h. A series of poly(urethane urea)-vinyl polymer hybrid aqueous dispersions are prepared. Waterborne poly(urethane urea) is synthesised from castor oil and polyoxypropylene polyol M = 1000 g moL ), dimethylol propionic acid and isophorone diisocyanate and then neutralised with tertiary amine. The hybrid aqueous dispersion with high oil content poly(urethane urea) exhibits excellent compressive mechanical strength. Sunflower oil-modified waterborne polyurethane resin may also be prepared. The waterborne resin is synthesised from the monoglyceride of the oU, poly(propylene-ethylene) triol, tartaric acid and toluene diisocyanate, then neutralised with triethyl amine. 

Some hyperbranched polyurethanes with different compositions based on Mesua ferrea L. seed oil, sunflower oil, and so on, have been prepared by using monoglyceride and glycerol or monoglyceride with hyperbranched polyol. Hyperbranched polyurethanes have been prepared from soybean oil-modified hyperbranched polyol obtained via epoxidation and hydrofor-mylation. Castor oil-based hyperbranched polyurethanes have been synthesised using castor oil as the B3 monomer in an A2 -1- B3 approach. The A2 monomer, -NCO terminated pre-polymer was obtained by reacting MDI with PCL. The urethane reaction was carried out at ca. 110°C in the... 

Conductive polymer nanocomposites may also be used in different electrical applications such as the electrodes of batteries or display devices. Linseed oil-based poly(urethane amide)/nanostuctured poly(l-naphthylamine) nanocomposites can be used as antistatic and anticorrosive protective coating materials. Castor oil modified polyurethane/ nanohydroxyapatite nanocomposites have the potential for use in biomedical implants and tissue engineering. Mesua ferrea and sunflower seed oil-based HBPU/silver nanocomposites have been found suitable for use as antibacterial catheters, although more thorough work remains to be done in this field. ° Sunflower oil modified HBPU/silver nanocomposites also have considerable potential as heterogeneous catalysts for the reduction of nitro-compounds to amino compounds. Castor oil-based polyurethane/ epoxy/clay nanocomposites can be used as lubricants to reduce friction and wear. HBPU of castor oil and MWCNT nanocomposites possesses good shape memory properties and therefore could be used in smart materials. ... 

A urethane alkyd is an alkyd in which some of the dibasic acid is replaced by diisocyanate. The ester links are formed first in the usual way, the diisocyanate is added and the remaining hydroxyls are reacted at 80-95 °C to form the urethane linkages (p. 223). It can be seen that the urethane alkyd shares the features of the urethane oil and the oil-modified alkyd. 

Polyurethanes. The main raw materials for urethanes are organic diisocyanates and various active hydrogen components, such as polyether polyols, hydroxyl-terminated polyesters, hydroxyl-terminated urethane polyethers, vegetable oils modified by alcohol or some diamines. 

Curing of oil-modified alkyds with polyisocyanates results in faster drying, better chemical resistance and abrasion resistance. Hydroxylated polyesters crosslinked with both aromatic and aliphatic polyisocyanates are finding extensive applications in high-quality maintenance finishes. These two-component finishes cure at ambient temperature. Aliphatic urethane types are used on aircraft, rail and other transportation equipment where excellent gloss retention and... 

For the most part, additives control the appHcation or theological properties of a paint. These additives include materials for latex paints such as hydroxyethylceUulose, hydrophobicaHy modified alkah-soluble emulsions, and hydrophobicaHy modified ethylene oxide urethanes. Solvent-based alkyd paints typically use castor oil derivatives and attapulgite and bentonite clays. The volume soHds of a paint is an equally important physical property affecting the apphcation and theological properties. Without adequate volume soHds, the desired appHcation and theological properties may be impossible to achieve, no matter how much or many additives are incorporated into the paint. 

Urethane alkyds and urethane oils are oil and alkyd resin-modified polyurethanes dissolved in a volatile solvent. Upon application and solvent evaporation, the coating is crosslinked and cured via oxidation by atmospheric oxygen. 

Inhibitive Primers. The traditional primers are red lead and linseed oil, alkyd resins and zinc potassium chromate, proprietary epoxy, alkyd, urethane and latex systems with modified phosphate, borate and molybdate pigments. Chromate-based pigments, although in use in aircraft coatings, automotive primers and coil coating primers, are subject to environmental concern on the toxicity of hexavalent chromium which is likely to result in their replacement by innocuous products. 

A varnish is a solvent-thinned combination of a drying oil and a hard resin. Also, a varnish is the clear film obtained using a varnish as a coating vehicle. By extension, vehicles used for clear films are called varnishes although the vehicle may be a true varnish, an alkyd resin solution, a urethane-modified oil, or even a lacquer. 

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