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Article
Publication date: 1 May 1979

Suman Pasari and S. Chandra

Polystyrene glycol was prepared and incorporated into linseed alkyd. Compatibility of polystyrene glycol and alkyd was investigated. It was found that 20 per cent…

Abstract

Polystyrene glycol was prepared and incorporated into linseed alkyd. Compatibility of polystyrene glycol and alkyd was investigated. It was found that 20 per cent polystyrene glycol could successfully be blended with linseed alkyd. Film properties of these blends were examined and compared with those of plain alkyd. It was observed that polystyrene glycol modified linseed alkyds were superior, in film properties, to the plain alkyd except in solvent resistant property.

Details

Pigment & Resin Technology, vol. 8 no. 5
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 September 1978

S. Chandra and D.K. Jindal

Polycarbonate, a polymer having extremely useful properties, was incorporated in linseed and DCO alkyds of various oil lengths. Compatibility of polycarbonate and alkyds

Abstract

Polycarbonate, a polymer having extremely useful properties, was incorporated in linseed and DCO alkyds of various oil lengths. Compatibility of polycarbonate and alkyds has been investigated. It was found that though polycarbonate was compatible with glyceryl phthalate, it was not compatible with alkyds (oil modified) in general. However, small amounts (4 to 10%) of the polycarbonate could be successfully blended with alkyds particularly with the short oil alkyds. Film properties of these blends were examined and compared with plain alkyds and epoxy modified alkyds in order to determine the usefulness of the polycarbonate‐alkyd blends. It was found that polycarbonate modified alkyds, even with such a small amount of polycarbonate, were superior in film characteristics to both the plain as well as epoxy modified alkyds.

Details

Pigment & Resin Technology, vol. 7 no. 9
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 7 September 2012

Desmond Teck Chye Ang and Seng Neon Gan

The purpose of this paper is to develop palm oil‐based alkyds as ultraviolet (UV) curable coatings and investigate the parameters that affect the coating performances.

Abstract

Purpose

The purpose of this paper is to develop palm oil‐based alkyds as ultraviolet (UV) curable coatings and investigate the parameters that affect the coating performances.

Design/methodology/approach

Alkyds were formulated from palm stearin, glycerol, phthalic anhydride and maleic acid. Keeping the total molar amount of dicarboxylic acids constant, the proportions of maleic acid and phthalic anhydride were varied in order to produce polymer chains with different content of unsaturation, which is crucial for UV curability. Characterisations were carried out by FTIR and 1HNMR. The alkyds were then mixed with methyl methacrylate (MMA) monomer as active diluents and cured by exposure to UV light. Performances of the cured coatings were tested in terms of film hardness, adhesion, water and alkali resistance, and thermal stability.

Findings

Upon introducing sufficient C=C, the alkyd in combination with MMA is able to UV‐cure within short time and produce film of satisfactory quality. There are several other factors, which influence the coating properties; these include thickness of coating, ratio of alkyd to active diluents, and duration of UV exposure.

Social implications

The product is a form of green technology that could benefit the environment as it involves very low or near zero emission of volatile organic compounds (VOC).

Originality/value

The novelty of this work lies in the formulation of new products from palm stearin, leading to new developments in the surface coating and palm oil industries.

Details

Pigment & Resin Technology, vol. 41 no. 5
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 June 1979

Suman Pasari and Sushil Chandra

Polystyrene glycol was prepared and incorporated into nigerseed oil and castor oil alkyds representing semi‐drying and non‐drying type alkyds respectively. Compatibility…

Abstract

Polystyrene glycol was prepared and incorporated into nigerseed oil and castor oil alkyds representing semi‐drying and non‐drying type alkyds respectively. Compatibility of polystyrene glycol with these alkyds was investigated. It was found that 11 to 12 per cent polystyrene glycol could successfully be blended with these alkyds. In order to determine usefulness of these polyblends, film properties were examined and compared with those of plain alkyds. It was observed that polystyrene glycol modified alkyd blends were superior in film properties as compared to plain alkyds.

Details

Pigment & Resin Technology, vol. 8 no. 6
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 March 1979

J.K. Vinaik, S. Chandra and A.K. Vasishtha

Polycarbonate was incorporated in castor oil and nigerseed oil alkyds of various oil lengths. Compatibility of polycarbonate with these alkyds was investigated. It was…

Abstract

Polycarbonate was incorporated in castor oil and nigerseed oil alkyds of various oil lengths. Compatibility of polycarbonate with these alkyds was investigated. It was found that only a small amount (4 to 10%) of polycarbonate could successfully be blended with these alkyds. Film properties of these blends were examined and compared with those of amino alkyd blends, in order to determine the usefulness of the polycarbonate alkyd blends. It was observed that polycarbonate modified alkyds, even with a small amount of polycarbonate were superior in film properties as compared to amino modified alkyds, especially with respect to chemicals and physical properties.

Details

Pigment & Resin Technology, vol. 8 no. 3
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 June 1984

Americus

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…

Abstract

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.

Details

Pigment & Resin Technology, vol. 13 no. 6
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 February 1998

Jochum Beetsma

Some of the properties of paints based on alkyd emulsion are discussed and they are divided into four categories. Colloidal stability of water based paints is…

Abstract

Some of the properties of paints based on alkyd emulsion are discussed and they are divided into four categories. Colloidal stability of water based paints is predominantly governed by osmotic and electrostatic repulsion of both the binder and the pigment particles. The rheological behaviour of paints based on binder dispersions should be optimised by using thickeners with the proper mix of hydrophilic and hydrophobic polymeric segments. Stability of drying properties of alkyd emulsion paints upon storage can be strongly improved by preventing the use of ketoximes as anti‐skinning agents and by selecting the proper driers. Properties of the dried paints depend strongly on the process of film formation. The protective and aesthetical quality of films based on binder dispersions is governed by the key parameters of the resin that is within the droplets; viscosity, miscibility and the ability of the binder to undergo crosslinking. To obtain the total package of desired properties of water based paints it is necessary that all of the paint components are adjusted to each other. This can only be done if the companies that develop and market the raw materials work closely together. The use of fundamental knowledge in such co‐makerships results in better and faster developments.

Details

Pigment & Resin Technology, vol. 27 no. 1
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 September 1981

Sushil Chandra and Suman Pasari

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…

Abstract

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.

Details

Pigment & Resin Technology, vol. 10 no. 9
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 13 September 2011

H. Abd El‐Wahab, F. Abd El‐Hai, M. Abd El‐Fattah and L. Lin

Demands for coatings with superior technical characteristics have induced the use of composite coatings, which usually represent an extremely strong product. The resin…

Abstract

Purpose

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.

Design/methodology/approach

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.

Findings

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.

Research limitations/implications

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.

Practical implications

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

Originality/value

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

Details

Pigment & Resin Technology, vol. 40 no. 5
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 19 September 2019

Ashraf El-Bindary, Hala Kiwaan, Abdel Ghany Shoair, Fawzia El-Ablack and Ahmed Eessa

The purpose of this paper is to introduce a new method for modification of alkyd resin by using 3-triethoxysilylpropyl succinic acid anhydride (TESP-SA) as the core…

Abstract

Purpose

The purpose of this paper is to introduce a new method for modification of alkyd resin by using 3-triethoxysilylpropyl succinic acid anhydride (TESP-SA) as the core material for low volatile organic components (VOCs) polyurethane coating applications.

Design/methodology/approach

The structural, physical, thermal and film properties of the silane-modified (SM) alkyd were evaluated and compared with those of a silane-free alkyd resin that was prepared by a single-step method. The synthesis reaction was described in a detailed scheme and evidenced by ATR-FTIR measurements and 13C-NMR spectroscopy.

Findings

SM alkyd has synthesized with high solid content (85%) and low viscosity (5700 cP). As a result, environmentally friendly coatings with lower (VOC) emission are possible by using this type of alkyd polymer. The results showed that the presence of the Si atom in the final structure improved the thermal stability against the higher levels of aromatic rings in the silane-free alkyd. It was found that coatings based on SM alkyd have lower values of yellowing factor (Δa) and an increase of gloss retention percentage at different intervals of exposure to the quick ultraviolet weathering conditions.

Practical implications

The synthesized SM alkyd resin provided a practical solution to obtain environmentally friendly coatings with low VOC content, in addition to its improvement in alkyds’ overall characteristics, while still using natural resources – fatty acids – instead of totally petroleum resources.

Originality/value

TESP-SA has not been used before in alkyd polymer modifications, and this study can help countries that are interested in using environmentally-friendly coatings.

Details

Pigment & Resin Technology, vol. 49 no. 2
Type: Research Article
ISSN: 0369-9420

Keywords

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