Short oil polyester

In the solvent process, polycondensation is carried out in the presence of a hydrocarbon solvent (usually xylene), which is immiscible in water and is capable of forming an azeotropic mixture. Solvent is commonly used in amounts from 3-10% of the batch. The solvent method is generally used in the preparation of short oil polyester resin. 

A short oil polyester resin based on Mesua ferrea L. seed oil was modified by partially butylated melamine-formaldehyde resin (70 30 weight ratio) using an industrial ball mill system to enhance its performance characteristics as a binder for stoving paint. ° The results indicate the suitability of the system, which is comparable to the industrial castor oil based resin system. Phthalic and maleic anhydride-based polyester of the same oil has also been modified by bisphenol-A-based epoxy or melamine-formaldehyde resin at different ratios. The resultant blends showed better performance in respect of the drying time, hardness, flexibility, gloss, pressure test, thermal stability and chemical resistance than the unmodifled polyester. ... 

Non-drying short oil polyester in combination with melamine-formaldehyde (MF) resin can also be used as a binder for stoving paint, as it can be cured at a high temperature and possesses a dark colour. A short oil polyester resin based on Mesua ferrea L. seed oil (consisting of monoglyceride of the oil, phthalic and maleic anhydrides) has been successfully used in the preparation of industrial stoving paint in combination with partially n-butylated MF resin. ° The performance characteristics of this paint are comparable with those of industrially used castor oil-based paint with the same formulation and processing conditions. As this oil is much cheaper than industrially used castor oil, the final cost of the test paint is lower than that of the standard paint. 

N. Dutta, N. Karak and S. K. Dolui, Stoving paint from Mesua ferrea L. seed oil based short oil polyester and MF resins blend. Prog Org Coat, 2007,58,40-5. 

Trimethylolpropane (TMP), the reduced crossed aldol condensation product of //-butyraldehyde and formaldehyde, competes in many of the same markets as glycerol (qv) and pentaerythritol. The largest market for TMP is as a precursor in unsaturated polyester resins, short-oil alkyds, and urethanes for surface coatings (see Alkyd resins). 

Uses Polyester for weather- and water-resist, two-component PU coatings, furniture coatings, clear and pigmented systems, stoving systems, appliance coatings binder for pigment pastes Features Compat. with short oil alkyd and amino resins, NC, cellulose acetate butyrate, aliphatic and aromatic isocyanates good weather and water resist. 

In selecting a solvent for a certain binder, one of the oldest rules still holds alike dissolves alike . Thus a solvent with a similar basic structure as the solute and a volatility adapted to the application technique was chosen as the first approach. For instance, for a long oil alkyd a low aromatic hydrocarbon solvent and for a short oil alkyd, containing relatively more aromatic entities, a high aromatic spirit or a pure aromatic solvent were suitable starting points. For polyesters, ester type solvents came under consideration. Brush... 

Aluminum triphosphate has limited solubility in water and is frequently modified with either zinc or silicon to control both solubility and reactivity [23,29]. Researchers have demonstrated that aluminium triphosphate is compatible with various binders, including long-, medium-, and short-oil alkyds epoxies epoxy-polyesters and acrylic-melamine resins [73-76]. Chromy notes that it is particularly effective on rapidly corroding coatings it may therefore be useful in overcoating applications [39]. 

Molded urethanes are used in items such as bumpers, steering wheels, instrument panels, and body panels. Elastomers from polyurethanes are characterized by toughness and resistance to oils, oxidation, and abrasion. They are produced using short-chain polyols such as polytetram-ethylene glycol from 1,4-butanediol. Polyurethanes are also used to produce fibers. Spandex (trade name) is a copolymer of polyurethane (85%) and polyesters. 

Coating materials may be based on short or medium-oil alkyds (e.g. primers for door and window frames) nitrocellulose or thermoplastic acrylics (e.g. lacquers for paper or furniture finishes) amino resin-alkyd coatings, with or without nitrocellulose inclusions, but with a strong acid catalyst to promote low temperature cure (furniture finishes) two-pack polyurethanes (furniture, flat boards) unsaturated polyester resins in styrene with free-radical cure initiated by peroxides (furniture) or unsaturated acrylic oligomers and monomers cured by u.v. radiation or electron beams (coatings for record sleeves paperback covers, knock-down furniture or flush interior doors). 

Treating petroleum oils with 3-5% calcium alkyl salicylate and 0.5-3% triethanolamine salts of phosphoric acid esters and ethoxylated dodecyl alcohol increases oxidation-thermal stability at 180-200°C in the manufacture of oil for metal parts quenching. The agent provides also short-term anticorrosion protection of the hardened articles [261]. Phosphoric acid salt alkyl esters are used in anticorrosives and aqueous dispersions in waterborne polyester coatings for metals [244]. 

The branched polyoxyalkylene mixed polyesters possess a high demulsifier effect. In the usual range of oil-processing temperatures, a complete water removal and a reduction of the salt content is achieved after a short time. 

However, Sails et al. [15] reported that solvent-free synthesis of oleic acid short-chain alcohols reached 100% of triolein conversion after only 6h at 40 °C by immobilized lipase of Pseudomonas cepacia. Furthermore, Kim [16] reported that the high conversion of 98.5% was possible at 45 °C of reaction temperature with 4 1 of methanol to oil molar ratio and 1% (v/v) methyl glucoside oleic polyester as an emulsifier using Novozym 435 in the presence of cosolvent. However, several researchers have reported that the conversion of... 

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