The results show that the thermal stability and physical film properties of petbased alkyd resins were better than reference alkyd resin phthalic anhydridebased resin. Analysis of polyesters and alkyd resins pdf free download. Preparation of the resin the formul ated penta alkyd was prepared by conventional method employing fusion technique. Preparation and characterization of alkyd resins of jordan valley. Trimet tme in short oil alkyd resins containing phthalic. Studies 29 are available on preparation and application of alkyd resins using fatty acids or oils. In the present paper we report the usage of maleic anhydride as a partial replacement of phthalic anhydride in long oil modified alkyd resins. Synthesis and characterisation of alkyd resins with glutamic. Unlike other nobake mould technologies the process yields no toxic fumes, but the moulds need a longer air curing.
Preparation of the anticorrosive paints with long oil alkyd resins. Preparation of the anticorrosive paints with long oil alkyd resins modified with maleic anhydride and phthalic anhydride long oil modified alkyd resins have a wide usage as film forming substances with protection characteristics at anticorrosive paints. Preparation of alkyd resin oil modified alkyd resin was prepared with dehydrated castor oil, glycerol and phthalic anhydride using naoh catalyst. Alkyd resins have acquired a prominent position in paints and coating industries because of their economy, ease of applications and good protection of materials from environmental attacks 4,8,10. Us3639314a process for the preparation of highviscosity. Standard test method for phthalic anhydride content of alkyd. Preparation of short oil alkyd as shown inabt le 2, short oil length alkyd resins 35 % oil length were formulated by using phthalic anhydride, glycerol and each ypet of oil. Alkyd resins, based on specific applications, are grouped be. The major subsequent product groups are plasticizers 56%, unsaturated polyester resins 17%, and alkyd resins 17%. The oil length is the weight percent of fatty acids in the finished resin. Phthalic anhydride and derivatives plasticizers, unsaturated.
In the latter preparation the alkyd resin is prepared by the simultaneous esterification of linseed fatty acids and phthalic anhydride with trimethylol ethane. It was therefore thought that kinetics of this products from different polybasic acids be studied. Chemical engineering department, faculty of engineering nnamdi azikiwe university, awka, nigeria corresponding author. The mixture of oil, glycerol and catalyst lioh, amounting to 03 0. Pdf synthesis and characterization of alkyd resin from delonix. Alkyd resins synthesized from postconsumer pet bottles.
The formulation of the resin is mentioned in table 2. Preparation and characterization of penta alkyds based on. Three alkyd resins a, b, and c of medium oil length were prepared using phthalic anhydride, maleic anhydride, and glycerol at stipulated ratios. Manufacture of alkyd resin from castor oil citeseerx. Pdf effect of phthalic anhydride loading on alkyd resins. Alkyd resin is defined as the reaction alkyd resin was synthesized from the.
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. The phases of the preparation of the modified alkyd resin with maleic and phthalic anhydrides are relised according to the table 2. Vance and coworkers 56 have reported the determination of the oil content in oilmodified orthophthalic polyester resins using ir spectroscopy. Modified alkyd resin lacquers were prepared from soya oil, pentaerythritol, phthalic anhydride and dacron by mixing with pigments, talc and a diluent and a drying agent, milled and filtered to form modified alkyd resin based paints 6. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. The first stage is to convert sunflower oil or linoleic acid to monoglycerides as a polyol by alcoholysis. A wide variety of phthalic alkyd resine options are available to you, there are 48 suppliers who sells phthalic alkyd resine on, mainly located in asia. Uzoh f chigozie, chemical engineering department, faculty of engineering nnamdi azikiwe university, awka, nigeria, tel. Binder the nonvolatile portion of the vehicle of a paint. Preparation of the anticorrosive paints with long oil alkyd.
Commonly, the term alkyd is limited to polyesters modified with oils or fatty acids. Alkyd coatings are typically sold in three classes. 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. Pdf preparation and characterization of alkyd resins based on. Preparation of the anticorrosive paints with long oil.
This supports the choice of methyl ester as a preferred alternative to the use of the raw rso in alkyd resin preparation. Us2954354a method of preparing alkyd resin from isophthalic. 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. Results and discussion viscosity of alkyd resins as oil length increases, viscosity t able 1 decreases. Acrylic resin a synthetic resin formed from either the polymerization or copolymerization of acrylic monomer. Deodorizer do distillate6, a cheaper source of fatty acids available as a byproduct from vegetable oil refineries specially generated in deodorization process, can be used as a fatty acid source for alkyd preparation. Formulation of mahlla oil based penta alkyd resin mpal a medium oil length alkyd resin was formulated using phthalic anhydride, pentaerythritol and mahua oil. One of the oldest polymers prepared from triglyceride oils is polyester resin and traditionally known as alkyd resin. Organic coatings based on alkyd and melamine resins are highquality industrial finishes. Analytical and physical investigation of alkyd resin in the. New alkyd resins were synthesized by reacting sunflower oil or linoleic acid with poly ethylene glycol or triethanol amine and phthalic. During preparation of alkyd resin by reaction between isocaprylic acid, phthalic anhydride, glycerol, and pentaerythritol the samples were successively taken away from the batch at different stages of the process and evaluated by analytical and physical ways.
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 a typical phthalate alkyd resin, the carbonyl absorption occurring at 1735 cm is due to two components, oil and phthalate. Iodine value of the alkyd shows that the level of unsaturation depends on the oil length of the resins. The top countries of suppliers are china, south korea, and india, from which the percentage of phthalic alkyd resine supply is 81%, 8%, and 6% respectively.
Trimet tme in medium oil alkyd resins containing phthalic. Synthesis and characterisation of alkyd resins with. Characterization and stability issues of artists alkyd paints. Phthalic anhydride is an important intermediate in the chemical industry.
After drying at 60 c for 1 h and cooling to room temperature in a desiccator, the precipitate was weighed and the phthalic anhydride content calculated. Soya oil, phthalic anhydride, glycerol, calcium hydrogen. In reckoning up the resin percentage, xylene 1 and white spirit as a solvent are included. Enhancing the quality of alkyd resins using methyl esters of. Modified alkyd resins as the versatile coating materials. Butylated urea formaldehyde resin was prepared in the laboratory by reacting 1 mole urea with 3 moles formaldehyde 37 per cent solution at 93 c for one hour at ph 7.
For the synthesis of alkyd binders, aromatic poly carboxylic acids derived from phthalic anhydride and isophthalic acid, are usually employed. Alkyd resins are any of a large group of thermoset resins that are essentially polyesters made by heating polyhydric alcohol with polybasic acids or their anhydride and used chiefly in making protective coatings good weathering with properties. Effect of phthalic anhydride loading on alkyd resins for. Chlorinated rubber is often used in combination with medium oil dryingtype alkyds. Mar 09, 2017 most commonly used dibasic acid in alkyd synthesis is phthalic anhydride while glycerols, pentaerythritol, trimethylol propane, glycols etc. In this study, commercial alkyd resins were blended with various proportions of phthalic anhydride and oil on solid. The quantity of the maleic anhydride is reckoned up as a percentage of the maleic anhydride quantity. 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 amino resin blends are probably the most important group of alkyd resins. Alkyd resin, deodorizer distillate, fatty acids introduction alkyds1 are used chiefly in coating industry. A typical alkyd resin is prepared by heating for example linseed oil, phthalic acid anhydride and glycerol to obtain a fattyacid containing polyester, as schematically shown fig 1. Gravimetric analysis of the phthalic anhydride content of alkyd resins and esters containing other dibasic acids such as maleic, fumaric, adipic and sebacic is described in astm d656.
Alkyd resin a synthetic resin made by condensation reaction release of water between a polyhydric alcohol glycerol, etc. Astm d563881996e1, standard test method for phthalic anhydride content of alkyd resins and resin solutions withdrawn 2004, astm international, west conshohocken, pa, 1996, back to top. The alkyd resin is mixed with a polymeric isocyanate and a metallic drier, which speeds the reaction. New alkyd resins were synthesized by reacting sunflower oil or linoleic acid with poly ethylene glycol or triethanol amine and phthalic anhydride in the presence of lead oxide as a catalyst. Alkyd resins manufacturing, formulation and processing. Many industrial baking enamels, such as those for appliances, coil coatings, and automotive finishes, are based on alkyd amino resin blends.
Alkyd resins were cheap and can perform good properties depend on the modification. The main purpose of this work is investigations on the possibility for using hydrolysis glycolysis products of waste pet in alkyd resins manufacturing. Chemical ijcptsynthesis and characterization of new alkyd. Expired lifetime application number us661293a inventor jr samuel young current assignee the listed assignees may. Effects of oil type on the properties of short oil alkyd. The combination of melamineformaldehyde resins with suitable alkyd resin in surface coatings yields better hardness. Phthalic anhydride is also used as an intermediate in the production of pigments and dyes, agricultural, pharmaceutical, and several other chemical. Isophthalic acid, which is typically applied in the industrial.
As indian industries are producing paint of amount approximately rs. Originally, alkyd resins were merely the reaction products of phthalic anhydride and glycerin. Iii alkyd resins were synthesized using oil, glycerol, and phthalic anhydride pa in different proportions. Preparation and analysis of alkyd resin from deodourizer. The solvent system showed a clear single phase solution and a clear coat of binder. The effects of polybasic acid type on kinetics of the. Kinetics of castor oil alkyd resin polycondensation reaction.
The effects of alkydmelamine resin ratio and curing. But these products were too brittle to make satisfactory coatings. Oil modified alkyd resin was prepared from sunflower oil with poly ethylene glycol or linoleic acid with triethanol amine and phthalic anhydride using pbo as catalyst. Several alkyd resins were prepared by treating a mixture of. In another procedure the alkyd resin is prepared in the usual manner by alcoholysis of the fatty acid with the polyol followed by phthalic anhydride condensations. The resulting resins are compared to a conventional alkyd resin that exclusively contains nonrenewable diacids. Table 2 general purpose medium oil phthalic anhydride alkyd air dry enamel 18% zirconium naphthenate. The kinetics of the preparation of unstyrenated and styrenated palm kernel oil based alkyd resins were studied. An esterification reaction between the two ingredients produces an ester molecule.
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