Characterization and stability issues of artists alkyd paints. The top countries of suppliers are china, south korea, and india, from which the percentage of phthalic alkyd resine supply is. Exploring the effect of styrene and anhydride ratio on the. Storage tank alkyd resin phthalic anhydride isophthalic acid white spirit these keywords were added by machine and not by the authors. Sorbitol aqueous solution and xylene used as the azeotropic. Alkyd resin, which is used in the production of a wide variety of paints, is supplied to the indian market both from domestic production and import. Modifications can provide resin coating systems which yield more durable and more rapidly drying films and controlled flexibility, durability and hardness of the dried film. Alkyd resins are produced by reacting a dibasic acid with a polyol and drying oil. An oilfree alkyd is essentially a polyester, whereas the alkyds discussed in this article are oilmodified the reaction basic to all polyester resins, including alkyds, is a condensation reaction of carboxyl groups with hydroxyl groups, eliminating water and forming an ester.
Preparation and characterisation of alkyd resins using crude and. The results showed that the alkyd resins synthesized from the blend of linseed and rubber seed. One of the most useful is a special formula that makes the paint yogurtthick. A silicone alkyd coating is a special type of coating in which alkyd resins are modified by adding silicone. The alkyd resins have been prepared from trimethylolpropane, phthalic and trimellitic anhydride as polyfunctional monomers, in the presence of benzoic acid as monofunctional reactant and of the oilfatty acid component table 1. Pdf alkyd resins include a very high proportion of common binders. Effect of phthalic anhydride loading on alkyd resins for. The effects of alkyd melamine resin ratio and curing temperature on the properties of the coatings. The use of synthetic alkyd resin for solventthinned oilbase paints has brought several advantages. A brush dipped in it carries more paint to the surface than previous versions. The precise combination of the ingredients used, together with the careful control of the reaction, influences the final properties of the alkyd produced. As the oil length of the resin increases, generally the viscosity decreases, the hardness of the film decreases, film flexibility increases and water. They are derived from polyols and a dicarboxylic acid or carboxylic acid anhydride.
For this reason, many alkyds are available to the coating formulator. Primary information services 21 murugappan st, swamynagar ext2, ullagaram, chennai 600091, india. Alkyd resin definition of alkyd resin by the free dictionary. Iii alkyd resins were synthesized using oil, glycerol, and phthalic anhydride pa in different proportions. Modified alkyd resins as the versatile coating materials. Most commonly used dibasic acid in alkyd synthesis is phthalic anhydride while glycerols, pentaerythritol, trimethylol propane, glycols etc. The alkyd resins market is estimated to reach 16,321. Iodine value of the alkyd shows that the level of unsaturation depends on the oil length of the resins. As indian industries are producing paint of amount approximately rs. Enhancing the quality of alkyd resins using methyl esters. The type of alkyd resin used in artists alkyd paints is a long oil alkyd, which is an oilmodified polyester polymer that con tains between 5670 weight percent wt % fatty acids.
Alkyd resin is defined as the reaction alkyd resin was synthesized from the. In this study, a new alkyd based resin was formulated using long oil alkyd and melamine based hyperbranched polymer having 24 functional groups on its structure. In alkyd paint, the binder is a synthetic resin, which is. D 6 test method for phthalic anhydride content of alkyd resins and esters containing other dibasic acids gravimetric3 d 97 test method for unsaponi. Rosin phenolic modified alkyd used to formulate economical primers for metal. The details about the paint formulations are given in table 1. Pdf synthesis and characterization of alkyd resin from delonix. The two resins that are combined are composed of different components. An investigation on synthesis of alkyd resin with sorbitol.
Three kinds of sorbitol based alkyd resins sar samples having fatty acid content ol f of 42% sar1, 52% sar2 and 62% sar3 were prepared with phthalic anhydride, sorbitol aqueous solution and soya bean fatty acid using fatty acid method. Trimet tme in medium oil alkyd resins containing phthalic. Synthesis and characterization of alkyd resin based on. Two resins11 i 66% linseed oil penta phthalic alkyd and ii 52% linseed oilglycerolphthalic alkyd were used as binders. The name alkyd, formed from alkyl a chemical abbreviation for alcohol and acid, denotes the chemical origin of the resin, which is commonly based on a polymerization reaction between an alcohol, such as glycerol, and a dicarboxylic acid or its anhydridefor instance, phthalic anhydride. Thixotropic alkyd resins and the use thereof in coating. Comparative analysis of soybean seed oil modified alkyd.
Dema preparation of the anticorrosive paints with long oil zastita materijala 51 2010 broj 2 87 kozeta vaso, scientific paper mevlude dema udc. Alkyd resin from phthalic acid a tribasic acid download pdf. This process is experimental and the keywords may be updated as the learning algorithm improves. Request pdf preparation and characterisation of alkyd resins using crude and. The preparation for different oil blends and unblended oils were formulated as follows. Alkyds are synthetic polymeric materials that have been used in the coating industry since the 1930s. Alkyd resins manufacturing, formulation and processing. Alkyd resins are polyesters built from polyhydric alcohols and polybasic acids. The inclusion of the fatty acid confers a tendency to form flexible coating. Saturated fatty acid yields nondyeing or plasticizing resin while drying properties are conferred by unsaturated acids.
Phenolic alkyd resins are alkyd resins modified with a phenolic resin in order to improve the properties of an alkyd resin for a particular application. Today, they continue to be workhorse polymers for the paint, coating, and printing ink industries. A color retentive rapid airdrying short oil alkyd designed for enamel and primer systems. In considering the applications of alkyd resins, it is convenient to take them in order of decreasing oil length.
Pdf the effects of alkyd melamine resin ratio and curing. Alkyd resins were cheap and can perform good properties depend on the modification. Modified alkyd resins hpp product series us polymers. Formulation and manufacturing process of alkyd resin. Alkyd resins are frequently modified to produce specific performance properties and finished film characteristics. The available manufacturer information on the resins was reported previously. Standard test method for phthalic anhydride content of. Pdf effect of phthalic anhydride loading on alkyd resins. A new alkyd resins were synthesized by reacting bitter almond oil or coconut oil with propylene glycol or ethylene glycol and phthalic anhydride in the presence of lead. The invention discloses styrene modified alkyd resin which comprises the following raw materials in percentage by weight.
Note 1this test method is not applicable for the determination of phthalic anhydride in alkyd resins containing other dibasic acids such as maleic or fumaric, or modifying agents such. Kyenge and others published comparative analysis of soybean seed oil modified alkyd resin and epoxidized soybean seed oil modified alkyd resin find, read and cite all. In the present paper we report the usage of maleic anhydride as a partial replacement of phthalic anhydride in long oil modified alkyd resins. Pdf preparation and characterization of alkyd resins based on. Preparation and characterization of alkyd resins of jordan valley.
Binders for paints and varnishes alkyd resins part 2. In the reactions of soybased polyol, maleic anhydride and phthalic anhydride. Alkyd resins products are suitable for wide range of products with application in. The oil or fatty acid portion of the alkyd is one of the factors which determine the paint formulators choice of resin to be used. Results and discussion viscosity of alkyd resins as oil length increases, viscosity t able 1 decreases. In this study, commercial alkyd resins were blended with various proportions of phthalic anhydride and oil on solid. The oil length of an alkyd resin is defined as the number of grams of oil used to produce 100 grams of resin. When silica is added to alkyd resins, the product formed is a specialized series of products that can be further used to formulate coatings. Hdit in a ratio of 20% by weight with respect to the alkyd resin, corresponding to a ncooh molar ratio of 1. An alkyd is a polyester modified by the addition of fatty acids and other components. Preparation and analysis of alkyd resin from deodourizer. Alkyd resins, based on specific applications, are grouped be. The term alkyd is a modification of the original name alcid, reflecting the fact that they are derived from alcohol and organic acids.
Analytical grade phthalic anhydride, glycerol, xylene, lead oxide, sodium hydroxide, sulphuric. A coating formulation including a at least one hydrophilic surfactant. Cn104311750a styrene modified alkyd resin, preparation. Preparation of alkyd resin oil modified alkyd resin was prepared with dehydrated castor oil, glycerol and phthalic anhydride using naoh catalyst. The alkyd resins a, b and c were settotouch at 50, 30 and 38 min. Preparation of the anticorrosive paints with long oil alkyd resins. A wide variety of phthalic alkyd resine options are available to you, there are 51 suppliers who sells phthalic alkyd resine on, mainly located in asia. The solvent system showed a clear single phase solution and a clear coat of binder. Alkyd resin from deodourizer distillate 809 xylene solvent and applied on test panels to study film performance properties drying, gloss, flexibility and adhesion cross hatch test by standard methods11. Preparation of the anticorrosive paints with long oil.
Alkyd resins technology handbook entrepreneur india. Alkydresinsproduction, types, technology, applications. Careful selection of the type of polyacids or anhydrides and polyalcohols may help in hampering the gelation of alkyd resin of choice and offers easy control of the process of polymerization for the alkyd resins. Preparation of alkyd resins by using some diacids with.
Two resins11 i 66% linseed oil penta phthalic alkyd and ii 52% linseed oilglycerol phthalic alkyd were used as binders. Characterization of unsaturated polyester and alkyd resins. It can be baked with both urea and melamine resins. The preparation was done in a 4neck round bottom flask fitted with a motorized stirrer, a nitrogen inlet, a thermometer pocked and a hold for sampling. In general, the lower the phthalic content of an alkyd, the higher the amount of oil used. Technical grade phthalic anhydride, glyc erol, benzoic acid and calcium carbonate used in chemical characterization of tomato seed oil were all of analytical. Phthalic anhydride, maleic anhydride, isophthalic acid, maleimide and phthalimide of dodecyl benzene have been used in preparing the alkyd resins. The formulation compositions for the synthesis of alkyd resin samples are given in table 1. The oil length is the weight percent of fatty acids in the finished resin. The performance characteristics of the alkyd resins and styrenated alkyd resin in terms of drying schedule and chemical resistance are shown in table 5. The ester group oco provides the name for the polyester many esters in the reaction product. The coating formulation is useful for making topcoats and primer coats. Alkyds and chemically modified alkyd resins are the condensation products of polybasic acids and polyhydric alcohols. Phthalic anhydride, glycerol and xylene were purchased.
Alkyd resins are any of a large group of thermoplastic resins that are essentially polyesters made by heating polyhydric alcohol with polybasic acids or their anhydride and used chiefly in making protective coatings and good weathering properties. But these products were too brittle to make satisfactory coatings. Due to construction of apartments, buildings, roads there is huge demand of paint in this sector. Increased demand of paint will need the basic raw material of paint i. Glycerol and phthalic anhydride react to form the polyester glyptal. Enhancing the quality of alkyd resins using methyl esters of rubber. This supports the choice of methyl ester as a preferred alternative to the use of the raw rso in alkyd resin preparation. The soybased polyol was obtained through the epoxidization of soybean oil, followed by ringopening with methanol and, the hydroxyl values of soybean oilbased polyols used in this reaction is 169.