Alkyd resins are manufactured from the condensation reaction between oil or polyols, acids, and alcohol. Fish oils may be used, and rosins are employed occasionally to improve hardness. Solvent release is better in case of PTBBA and gives better solubility in xylene. US Europe Long-Oil Alkyd Red Iron Oxide Primer using HALOX SZP-391 ; US Europe Long-Oil Alkyd Red Iron Oxide Primer using HALOX® CW-2230 ; US Europe Low-Cost Long Oil Alkyd Red Iron Oxide Primer using HALOX® Z-PLEX 111 ; Europe Low-Cost Long-Oil Alkyd Red Iron Oxide Primer using HALOX® Zinc Phosphate Alkyd Resins are the backbone of many paint formulations and Short Coconut Alkyd Resin is a versatile non-oxidising and non-drying resins that are used in various end applications. An alkyd resin, as defined in claim 1, wherein said phthalic acid is terephthalic acid and said semi-drying oil is soybean oil. Hybrid waterborne alkyd–acrylic dispersions with solid content of 40%, free from any surfactant and exempt of any organic solvent, were successfully synthesized by a melt co-condensation reaction between an acrylic prepolymer bearing carboxylic groups and a long-oil alkyd resin. Applications. Alkyd resins have replaced the basic components of the anticorrosive paints, which formerly were produced through thermo-chemical processing of colophon products with polymerized vegetable … Applicationlune 27, 1949, Serial No. Example 6.-A similar alkyd resin with an oil length of 80% is prepared by heating a batch of 1.05 of soybean oil fatty acids, 0A9 mol of pentaliythritol and 0.40 mol of isophthalic acid for 13 hours at 260 C. to an acid number of 2. Alkyd Resin – Long oil. The alkyd resin is mixed with a polymeric isocyanate and a metallic drier, which speeds the reaction. The oil or fatty acid portion of the alkyd is one of the factors which determine the paint formulator's choice of resin to be used. by its ability to dissolve in 350 mineral spirits to produce a 60% solution having a viscosity of at least 4 poises at 25 C". The long established basic principle for formulating alkyd resin paints is based on the use of three main components which are joined together by means of ester bonds: 1. The term ‘alkyd’ was first used by Kienle in 1927 to describe the reaction products of polyhydric alcohols (AL) with polybasic acids (KYD). 0., until the desired acid number of less than and the desired viscosity of at least 4 poises at C. in a solution of 350 mineral spirits are obtained. A general alkyd resin formulation was prepared according to the formulas in Table 1. 1. Good durability and very good yellowing resistance in light and darkness. Because esterification … This mixture of reactants is heated at the desired temperature from about 230 C. to about 280 C. to a desired low acid number of less than 15 and a desired viscosity of at least 4 poises at 25 C. in a solution of 350 mineral spirits. Baking Alkyd Resin. Dissolved in appropriate solvents, and applied therefrom by brushing or spraying to various surfaces, these resins dry rapidly, forming durable, glossy films which favorably compare with those previously obtained in the art with other types of surface coatings. The term 350 mineral spirits as used in this specification designates a etroleuzn distillate boiling Within the range from 320 F. to about 395 n, boiling ever at 34:2-343" F. (ASTMDistillation D486). This mixture of partial esters is condensed (cooked) with about 2 mols of phthalic acid, such as isophthalic or terephthalic, at a temperature from about 230 to about 280? endstream endobj 44 0 obj <> endobj 45 0 obj <>/Font<>/ProcSet[/PDF/Text]>>/Rotate 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 46 0 obj <>stream 3. Oil Type. A process for preparing a semi-drying modified alkyd resin having an oil length from '70 to 80%, which comprises heating pentaerythritol and a semi-drying oil under the conditions of alcoholysis in the presence of a basic catalyst at a temperature of about 230 to about 260 C. sufficient to cause formation of a mixture of partial esters of pentaerythritol and glycerol, containing on the average from 1.5 to 2.4 hydroxyl groups per molecule, and condensing said mixture of partial esters with a. phthalic acid wherein the carboxyl groups are separated by at least 3 carbon atoms on the benzene ring and which is free from reactive substituents other than said carboxyl groups, at a temperature from about 230 to about 280 C., until a final alkyd resin is obtained, which has an acid number of less than 15 and a viscosity in a 60% solution thereof in 350 mineral spirits equal to at least 4 poises at 25 C. 10. A process for preparing an alkyd resin by condensing at a temperature from about 230 C. to about 280 C. a mixture of a phthalic acid in which the carboxyl groups are separated from each, other by at least 3 carbon atoms of the benzene ring, and which is free from reactive substituents other than said carboxyl groups, pentaerythritol and semi-drying oil fatty acids containing from about 1.4 to about 1.75 carbon double bonds per rnolecule to form a final alkyd resin having a pentaerythrito1 oil length of 70 to 80%, calculated as tetrapentaerythritide, and characterized by an acid number of less than 15 and the ability to dissolve in 350 mineral spirits, forming a 60% solution which has a viscosity of at least 4 poises at 25 C. and a tack-free drying time of about 2 hours. Tri- or polyfunctional alcohols (glycerin in the typical case) and 3. 9. The majority of fatty acids come from vegetable oils; soybean oil is the most utilized. 73 0 obj <>stream It has strong mechanical properties and has a good resistance against impact, flex, wear and tear. The word oil as used here denotes oil obtained by esteriiication of a polyhydric alcohol with monocarboxylic fatty acids. APPLICATION Decorative enamels in white and pastel shades for interior and exterior use. Alkyd Resin – Short oil. I have now found that the addition of auxiliary reactive compounds such as maleic anhydride is obviated, and new and improved oil-modified alkyd resins With oil lengths from about '70 to about 80% are obtained by employing semi-drying oils, pentaerythritol and phthalic acids in which the carboxylic groups are separated from each other by at least 3 carbon atoms of the benzene ring. These are formulated using accurate composition of various chemicals and are widely applicable in formulation of wide range of paints and varnishes. It has been a common practice to modify the composition of such alkyd resins by the introduction of organic monocarboxylic fatty acids derived from vegetable oils or animal fats to replace a portion of the polycarboxylic acid in the resin. AN ALKYD RESIN CONSISTING OF A PRODUCT OF CONDENSATION OF A PHTHALIC ACID IN WHICH THE CARBOXYL GROUPS ARE SEPARATED FROM EACH OTHER BY AT LEAST 3 CARBON ATOMS OF THE BENZENE RING AND WHICH IS FREE FROM REACTIVE SUBSTITUENTS OTHER THAN SAID CARBOXYL GROUPS, WITH THE PRODUCT OF ALCOHOLYSIS OF A SEMI-DRYING OIL BY PENT AERYTHRITOL, SAID PRODUCT OF ALCOHOLYSIS ESSENTIALLY CONSISTING OF A MIXTURE OF PARTIAL ESTERS OF POLYHYDRIC ALCOHOLS FROM THE GROUP CONSISTING OF PANTAERYTHRITOL AND GLYCEROL, AND CONTAINING ON THE AVERAGE FROM 1.5 TO 2.4 HYDROXY-L GROUPS PER MOLECULE, SAID ALKYD RESIN HAVING A SEMI-DRYING OIL LENGTH OF 70 TO 80%, CALCULATED AS TRIGLYCERIDE, AN ACID NUMBER OF LESS THAN 15 AND BEING FURTHER CHARACTERIZED BY ITS ABILITY TO DISSOLVE IN 350 MINERAL SPIRITS TO PRODUCE A 60% SOLUTION HAVING A VISCOSITY OF AT LEAST 4 POISES AT 25* C. AND A TACK-FREE DRYING TIME OF ABOUT 2 HOURS. 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