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Demands for coatings with superior technical characteristics have induced the use of composite coatings, which usually represent an extremely strong product. The resin blend technique is a simple and useful method for improving paint properties. Coal tar resins are the most economical coating extensively used in the industry; short oil‐length alkyd resins are usually used for air and force‐dry industrial coatings for metal surfaces. The purpose of this paper is to evaluate coating blends composed of these resins, in particular, the effects of short oil‐length alkyd additive on the properties of coal tar binder.

One way to achieve new types of binders is to make combinations of the existing ones, in an ideal case retaining the desirable properties of both. The alkyd has important properties over the original drying oil. To achieve the goal of improving coal tar resin properties, short oil‐length alkyd was blended with it. The prepared short oil‐length alkyd was characterised using IR and ¹HNMR spectroscopy. The mixing ratio of short oil‐length alkyd with coal tar was up to 25 per cent. The compatibility of coating blend was characterised by scanning electron microscope. The physical, mechanical and chemical properties of the coating blend in addition to the corrosion resistance were determined according to ASTM methods.

In spite of a large number of synthetic resins being available for use in paint formulations, the alkyd resins surpassed all of them in versatility and low cost. The blend of short oil‐length alkyd resin with coal tar has yielded better coating blend properties. The coating blend showed significant enhancement of physical, mechanical and chemical properties such as gloss, drying time, adhesion, scratch hardness, acid and solvent resistance because the coating blend combines the properties of thermosetting and thermoplastic resins.

Alkyd resins are the most extensively used synthetic polymers in the coating industry. Modification of coal tar blend based on other type of polyester resins could also be studied in order to assess the applicability of the coal tar blend system found for other applications.

These types of alkyd resins can be applied in other bitumen composites as additives and reinforce agent.

The paper shows how the low‐cost modified coal tar binder can be used for air and force‐dry industrial coatings for metal surfaces.

Alkyd resins are among the most mature raw materials the protective coatings industry uses. At the same time they are the largest volume oil‐based vehicles used in paints around the world. This might raise the question “is there anything really new with alkyds?” The answer is a resounding “yes!” There is new commercial as well as technical activity. In the former category one finds activity in the Arab world where oil‐based affluence has created a need for protective coatings raw materials. Thus in Jordan a company known as Universal Chemical Industries has set up to produce alkyd resins as well as poly(vinyl acetate) emulsions with the objective of supplying the domestic coatings industry. Technology comes from Ashland Chemicals' European subsidiaries. Similarly, in Saudi Arabia, Arabian Gulf Resins International announced plans to build a large alkyd resin plant at Damman using Deutsche Texaco's technology.

Alkyds are the work horse of paint industry. In order to obtain desired film properties, alkyd resins are frequently modified by other resins and polymers either by physically blending them or chemically incorporating them. Some of the recent physical modifications of alkyds have been described in this first part of the article. The chemical modifications will be described in the second part.

This paper aims to investigate the prepared modified alkyd and poly(ester-amide) (PEA) resins as antimicrobial and insecticide binders for surface coating applications.

Salicylic diethanolamine and 4-(N, N-dimethylamino) benzylidene glutamic acid were prepared and used as new sources of polyol and dibasic acid for PEA and alkyd resins, then confirmed by: acid value, FT-IR and 1H-NMR. The coating performance of the resins was determined using measurements of physico-mechanical properties. The biological and insecticide activities of the prepared resins were investigated.

The tests carried out revealed that the modified PEA and alkyd enhanced both phyisco-mechanical and chemical properties in addition to the biological and insecticide activities. The results of this paper illustrate that the introduction of salicylic diethanolamine and 4-(N, N-dimethylamino) benzylidene glutamic acid within the resin structure improved the film performance and enhanced the antimicrobial activity performance of PEA and alkyd resins.

The modified alkyd and PEA organic resins can be used as biocidal binders when incorporated into paint formulations for multiple surface applications, especially those that are exposed to several organisms.

Modified alkyd and PEA resins based on newly synthesized modifiers have a significant potential to be promising in the production and development of antimicrobial and insecticide paints, allowing them to function to restrict the spread of insects and microbial infection.

This paper aims to prepare new modified alkyd resins and use it as an antimicrobial binder for surface coating applications.

Various modified alkyd resins were prepared by partial replacement of 3,6-dichloro benzo[b]thiophene-2-carbonyl bis-(2-hydroxy ethyl)-amide as a source of polyol with glycerol and confirmed by acid value, FT-IR, 1H-NMR. The modified alkyd resins were covering a wide range of oil lengths and hydroxyl content (0%, 10%, 20% and 30% excess-OH). The antimicrobial activity of the prepared alkyds was also investigated. The coatings of 60 ± 5 µm thickness were applied to the surface of glass panels and mild steel strips by means of a brush. Physico-mechanical tests, chemical resistance and antimicrobial activities were investigated.

The obtained results illustrate that the introduction of benzo[b]thiophene derivative as a modifier polyol within the resin structure improved the film performance and enhanced the physico-mechanical characteristics, chemical resistance and the antimicrobial activities.

The modified alkyd resins can be employed as antimicrobial binders in paint compositions for a variety of surfaces, particularly those that are susceptible to a high number of bacteria.

Modified alkyd resins based on antimicrobial heterocyclic compounds have the potential to be promising in the manufacturing of antimicrobial coatings and development of paints, allowing them to function to prevent the spread of microbial infection, which is exactly what the world requires at this time. Also, they can be applied in different substrates for industrial applications.

In order to obtain desired film properties, alkyd resins are frequently modified by other resins and polymers either by physically blending them or chemically incorporating them. Some of the recent physical modifications of alkyd have already been described in the first part of the article. In this second part, the different types of resins and polymers used for the chemical modifications of alkyd resin are reviewed. A critical discussion on generally recognised advantages and disadvantages of the resultant coating from each modifier is described. Their use in surface coating industry are enumerated. Types of modifier to be used for improving a particular property in the coating are also suggested.

In this study, organo clay modified alkyd resins were synthesised and these modified alkyd resins were cured with different ratios of phenol formaldehyde resin. The purpose of this paper is to investigate the physical and chemical properties of the films and thermal behaviours of the resins.

Alkyds formulated to have an oil content of 40 percent were prepared with phthalic anhydride (PA), glycerine (G), coconut oil fatty acid (COFA), dipropylene glycol (DPG) and organo clay. “K alkyd constant system” was used for the formulation calculations of the alkyd resins. Alkyd resins were blended with 30 percent of a phenol–formaldehyde. The films of the alkyd–phenol formaldehyde (A‐PF) resins were prepared from 60 percent solid content xylene solutions by using 50 μm applicators. After the films were cured at 150°C for 2 h in an oven, properties of the films were determined.

The effect of organo clay addition on the film properties such as drying degree, hardness, adhesion strength, impact resistance, water, acid, alkaline, solvent resistance and thermal behaviours of the resins were investigated. The addition of organo clay has a positive effect on the physical and chemical film properties for phenol formaldehyde resin.

The paper reports on a study in which organo clay modified A‐PF resins for manufacturing of industrial baking enamels were synthesised for the first time.

Modifies short and medium alkyd resins using perfluori‐nated urethane toluene isocyanate (PFUTI), and incorporates the modified resins in a set of paint formulations containing different ratios of zinc phosphate as an inhibitive pigment. Achieves promising results and illustrates corrosion‐protective properties in various paint formulations and also a paint formulation free of the inhibitive pigment. Shows enhancement of the corrosion protection efficiencies by the improvement in the hydrophobicity of alkyd resin modified with PFUTI. In view of these results, minimizes or neglects the most expensive inhibitive pigments from an economical standpoint.

Alkyd resins are—and undoubtedly will continue to be—the mainstay of the protective coatings industry. In 1970 one estimate indicated that 680 million pounds of alkyd resins with a value of 180 million dollars were utilised by the paint industry. Thus alkyd resin usage was far ahead of the next contender, vinyl resins. These, which find important application in water‐based paints were utilised to the extent of 300 million pounds worth about ninety million dollars. Altogether 1.67 billion pounds of synthetic resins were utilised and these were worth 530 million dollars. Thus alkyd resins accounted for about 41 per cent of the total synthetic resin volume and 34 per cent of the dollar value.

Short and medium alkyd resins were modified using perfluorinated urethane toluene isocyanate (PFUTI). The modified resins were incorporated in a set of paint formulations containing different ratios of zinc phosphate as an inhibitive pigment. Promising results were achieved and corrosion protective properties were illustrated in various paint formulations and also in a paint formulation free of the inhibitive pigment. The corrosion protection efficiencies were enhanced by the improvement in the hydrophobicity of alkyd resin modified with perfluorinated toluene isocyanate (PFUTI). These results encourage us to minimize or neglect the most expensive inhibitive pigments from the economic point of view.