Synthesis and Characterization of Polyesteramide Resin from Rubber Seed Oil for Surface Coating Application (original) (raw)
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New modified polyesteramide resin for industrial applications
Progress in Organic Coatings, 2010
Polyesteramide resins (PEA) combine the properties of both polyester and polyamide resins. These resins may be modified with various polyhydric alcohols to produce resins with modified properties. Hydroxy ethyl fatty acid amide (HEFA) is the main source of polyhydric alcohol used in polyesteramide resins. New modified polyesteramide resins were prepared and evaluated as anticorrosive varnish for industrial applications by partial replacement of hydroxy ethyl fatty acid amide (HEFA) with polyethylene glycol (PEG 400 ) without affecting the resin constants. Primer formulations based on these modified resins improve the films properties and show good physicochemical and corrosion inhibiting properties.
SYNTHESIS AND CHARACTERIZATION OF PALM OIL BASED AIR DRYING ALKYD RESIN FOR SURFACE COATING
The high costs, the environmental impact and the decrease of fossil resources have intensified the g lobal need for alternative raw mate rial in different industrial fields. Palm oil (PO) was chosen for this study in view of its abundance and renewability. The viability of synthesizing an air drying alkyd resin through the poly merization of non - drying palm oil (PO) was studied. The oil was first analyzed to examine the physico - Chemical properties (iodine value, viscosity, refractive index, acid value, and specific gravity) and subsequently neutr alized and dehydrated. The alkyd resin synthesis involves reduction of the triglycerides by alcoho lysis to obtain palm oil monoglycerides (POMG) at 240 o C, followed by functional group modification with phthalic anhydride via plyesterification at 250 o C. FT - IR was used to detect the chemical structure of ester links present from the condensation polymeri zation reaction. Physico - chemical properties of the polyester were studied in terms of drying speed, solubility, chemical resistant, adhesion and abrasion resistant. The result obtained s howed that the polyester based on palm oil have high drying speed in presence of drying agent, exhibit excellent adhesion which indicates better protection of the substrate, and very promising in paint formulation
Asian Journal of Chemical Sciences, 2023
Alkyd resin of 40 % oil length was synthesized from the polyesterification reaction of glycerol, pthalic anhydride and sesame seed oil. Physicochemical properties such as iodine value, saponification value, density, moisture absorption, acid value and viscosity were determined to be 70.2 gI2/100g, 227.5 mgKOH/100g, 0.953 g/cm3, 0.22%, 9.23 KOH/g and 123.22 m.Pa.s respectively for the sesamum indicum seed oil modified alkyd resin (SISOMAR). Differential scanning calorimetry and thermogravimetric analysis were employed for the characterization of the Original Research Article
Synthesis, Characterization and Performance Evaluation of Breadfruit Seed Oil Modified Alkyd Resin
Long and medium oil length alkyd resins were synthesized using breadfruit seed oil by the alcoholysis process. Oil extracted from the seeds of breadfruit were refined and characterized in terms of acid, iodine and saponification values. Glycerol and phthalic anhydride were used as the polyol, and polybasic acid respectively in the synthesis of the resins. Soyabean oil modified alkyd resin served as the reference alkyd resin. The drying properties of the alkyd resin investigated showed that the synthesized alkyds dried satisfactorily at alkyd film thickness of 0.10 mm, irrespective of alkyd resin oil length. While the synthesized alkyds showed good water, and acid resistance. All the synthesized alkyds failed the alkali resistance tests. The adhesion properties of the synthesized alkyd samples were good. Similarly, there was no mildew formation in any of the synthesized alkyd samples, an indication of bio-stability of the synthesized alkyds. The alkyd samples exhibited good storage property, an indication of better performance in coatings, and hence compared favourably with the reference oil, soyabean. This study has highlighted the utility of breadfruit seed oil in the coatings industry.
Development of amine–acid cured Annona squamosa oil epoxy anticorrosive polymeric coatings
Progress in Organic Coatings, 2006
Forecasts for exhaustion of depleting petroleum resources in the years to come and escalating prices of petro-based chemicals, advocate the utilization of monomers/polymers derived from sustainable resources as an alternative. Oils of certain seeds may hold considerable promise as a source of unsaturated hydrocarbon, an excellent starting material for epoxidation and subsequent polymer production. Seeds of Annona squamosa (oil content 42-45%), go as a natural waste. Oil obtained from these seeds contains good amount of unsaturation; however, it has not been reported to be epoxidised, yet. Thus, epoxidation of A. squamosa oil (AOE) has been carried out in our effort to utilize a sustainable resource through the development of an anticorrosive coating material. AOE was further cured with different curing agent systems (ethylenediamine/phthalic acid (EDA-PA), 1,3-propanediamine/phthalic acid (PDA-PA), ethylenediamine/adipic acid (EDA-AA), 1,3-propanediamine/adipic acid (PDA-AA), p-phenylenediamine/adipic acid (PhDA-AA). AOE and AOE curing agent systems were subjected to structural elucidation by spectroscopic techniques (IR and 1 H NMR) and physico-chemical characterization (refractive index, specific gravity, iodine value, saponification value, hydroxyl value) involving standard methods. Thermal stability of these resins was investigated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Coatings of oil epoxy curing agent combinations prepared on Fe-and Al-alloys (mild steel and aluminium-24345) were subjected to physico-mechanical and anticorrosive tests in various corrosive media (water, saline water, acid and alkali) along with abrasion and steam resistance, light fastness, water vapour transmission, gloss, salt fog and humidity tests. These systems apprise satisfactory performance under different corrosive environments. The approach offers an alternate way for resource utilization and overcomes the drawbacks (poor load-bearing capacity and hardness) of oil epoxy-based coatings.
Development and characterization of vinylated polyesteramide from non-edible seeds oils
Progress in Organic Coatings, 2006
Annona squamosa-and Pongamia glabra-based polyesteramides (ASPEA and PGPEA) have been reported as corrosion protective coatings. To improve their film properties such as curing, physico-mechanical and anticorrosive properties further, post-vinylation of these resins with styrene and vinyl acetate monomer in varying ratio (4:1, 3:1 and 2:1) was carried out in the presence of free radical initiator (benzoyl peroxide). The incorporation of styrene and vinyl acetate in ASPEA/PGPEA was confirmed by FTIR and 1 H NMR spectral techniques. Physico-chemical, physico-mechanical and anticorrosive properties were studied by standard methods. Thermal stability and curing behaviour of vinylated ASPEA/PGPEA was studied by thermo gravimetric analysis (TGA) and differential scanning calorimetry (DSC) techniques. It has been observed that vinylation of these resins improves the curing, physico-mechanical and anticorrosive performance of ASPEA/PGPEA films. Among all 2:1 ASPEA/PGPEA:styrene/vinyl acetate ratio exhibited best results.
Seed oil based polyester polyols for coatings
Journal of Coatings Technology and Research, 2009
The hydroformylation of seed oil based fatty acid methyl esters leads to aldehyde intermediates that can be hydrogenated to give novel seed oil based monomers. In this study, the seed oil based monomers were polymerized with low molecular weight diols to produce novel aliphatic polyester polyols with very low viscosities. The seed oil polyester polyols provide environmentally friendly (green) coating formulations with low volatile organic compound emissions which lead to coatings with superior physical properties, such as exceptional hydrolytic resistance and flexibility. From these polyester polyols, waterborne polyurethane dispersions were also developed with excellent stability resulting in coatings with superior physical properties (i.e., good toughness and abrasion resistance), and exceptional hydrolytic and acid resistance.
Heliyon, 2019
This study was aimed at the synthesis and characterization of alkyd from rubber seed/linseed oil blends. Different percentages of rubber seed oil were blended with linseed oil for the preparation of alkyd via condensation polymerisation of monoglyceride with phthalic anhydride. Physiochemical properties like colour, acid value, saponification value, iodine value, drying schedule, chemical resistance were evaluated for the different alkyd samples synthesized. The colour of the different samples was unaffected by blending. The acid values of the alkyds obtained were observed to be in the range of 8.59-10.1 mgKOH/g. The iodine values of the different alkyd samples prepared increased with increase in the percentage of linseed oil in the blends. The blends showed resistance to brine, water and acid. However, only some exhibited fair resistance to alkali. The intrinsic viscosity was also determined by extrapolation from Huggins and Kraemer viscosity relationship. The results showed that the alkyd resins synthesized from the blend of linseed and rubber seed oil showed favourable properties that make linseed oil good blending oil for the synthesis of alkyd resin.
Study on the curing reaction of epoxidized rubber seed oil for eco-friendly composite application
Vietnam Journal of Chemistry, 2018
Methylhexahydrophthalic anhydride (MHHPA) was used as a hot curing agent for epoxidizing rubber seed oil (ERSO and ERSOe) with the presence of methylimidazole (NMI) catalyst. The effect of MHHPA, NMI, glycerol content and temperature on hardening process was studied through the peak exothermic temperature of the curing reaction. Moreover, differential scanning calorimetry analysis (DSC) was used to calculate a curing degree versus reaction time. The obtained optimal conditions (the molar ratio of epoxide group to MHHPA: 1.05/1; the content of NMI and glycerol: 3 wt% and 1.5 wt% of total weight of the resin and MHHPA; curing temperature of 140 and 160 o C for ERSOe and ERSO matrix, respectively) were used for manufacturing the eco-friendly composites. The results showed that this study could open up the new pathway of replacing a petroleum-derived hazardous unsaturated polyester resin with the eco-friendly epoxidized rubber seed oil in manufacturing the composite.