Search results

1 – 10 of over 3000
Article
Publication date: 29 June 2012

R. Mehdipour, C. Aghanajafi and A. Ashrafizadeh

The purpose of this paper is to model radiation ovens and to propose a method capable of designing this kind of oven for the paint curing application. Providing a uniform cure

Abstract

Purpose

The purpose of this paper is to model radiation ovens and to propose a method capable of designing this kind of oven for the paint curing application. Providing a uniform cure condition on the body, especially bodies of complicated geometries, needs accurately‐designed ovens. An algorithm with high speed and high convergence capability is the most serious requirement for designing ovens of this kind.

Design/methodology/approach

In this paper, the state of the art in dynamic optimisation of radiation paint cure ovens is reviewed and a novel objective function, based on paint cure window, is proposed to be applied for designing radiation ovens. It has been shown that the proper definition of the objective function in such problems makes the mathematical model more robust and hence facilitates the convergence of the design iterations.

Findings

The computational results provide some information regarding the design space topology and show that the proposed objective function speeds up the convergence of the design procedure by an order of magnitude as compared to the currently used industrial‐standard objective function.

Practical implications

Determination of curing condition is an important requirement for designing a new oven or changing the working condition of an existing oven. In this research, a practical method is proposed for improving design procedure of cure ovens to make the method both time and cost efficient. The method is specifically implemented on paint cure ovens.

Originality/value

The quality of cured paint is usually a prominent issue that directly takes influence from the curing condition of ovens. For the complex geometries of curing body in commonly designed ovens, some areas are not properly cured or may be burnt. This issue is a significant defect in coating industry. Designing ovens with the proposed method in this paper guaranties the provided curing condition by the oven and therefore the curing quality.

Details

Pigment & Resin Technology, vol. 41 no. 4
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 5 September 2016

Shekhar P. Tambe, Shwetambari D. Jagtap, Ramakant N. Choudhari and B.P. Mallik

The performance of epoxy coating on metal substrate at low temperature and high humidity application has adverse effect on cure rate, film properties and adhesion. In recent…

Abstract

Purpose

The performance of epoxy coating on metal substrate at low temperature and high humidity application has adverse effect on cure rate, film properties and adhesion. In recent years, several advanced amine cross-linking agents having superior curing ability at low temperature application environment have been introduced. The aim of this paper is to study the properties of epoxy-based coating cured with different cross-linking agents designed for low temperature application at different environmental conditions.

Design/methodology/approach

Series of cross linking agents such as modified cycloaliphatic amine (H1), polyamine adduct (H2), modified aliphatic ketamine (H3), phenalkamine (H4) and phenalkamide (H5) have been studied to evaluate their performance in epoxy compositions when cured at four environmental conditions, i.e. at ambient and sub-ambient temperatures with 60 and 90 per cent relative humidity, respectively. The effect of curing conditions was investigated by evaluating different physico-mechanical properties. Dynamic mechanical analyser technique was used to determine glass transition temperature (Tg) and cross-link density (ρ) of coatings. Anticorrosive properties of coatings also have been studied by electrochemical impedance spectroscopy.

Findings

The outcome of this study is expected to generate new insight into the curing behaviour of epoxy coating using different cross-linking agents which are recommended for low temperature application. Optimum physico-mechanical and corrosion resistance properties have been obtained by phenalkamine curing agent at low temperature and high humidity condition.

Practical implications

This study is an experimental approach to select the better cross-linking agent for low temperature application. Different test conditions were measured for understanding the performance of epoxy coating cured at different environmental condition.

Originality/value

The understanding reaction mechanism of the epoxy resin with cross-linking agent at different environmental condition is the great challenge and is hardly investigated in the literature. Therefore, in this research, the influence of climatic conditions and type of cross-linking agents on curing behaviour of epoxy-based coating was investigated.

Details

Pigment & Resin Technology, vol. 45 no. 5
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 1 January 1964

J.P.M. Denny

Of all the resins used by paint technologists in the formulation of paints the most interesting, as a class, are the epoxy resins. This interest stems, not from their chemical…

Abstract

Of all the resins used by paint technologists in the formulation of paints the most interesting, as a class, are the epoxy resins. This interest stems, not from their chemical composition, but from the enormous range of practical uses to which these resins can be put. An attempt has been made in this paper, read to the N.E. branch of BACE, to rationalise the common ways in which epoxy resins are used as protective film formers and to simplify the choice of systems for any particular corrosion problem.

Details

Anti-Corrosion Methods and Materials, vol. 11 no. 1
Type: Research Article
ISSN: 0003-5599

Article
Publication date: 1 May 1958

During recent years the introduction of the epoxy resins has led to the development of a comparatively new range of surface coatings which are playing a notable part in the battle…

Abstract

During recent years the introduction of the epoxy resins has led to the development of a comparatively new range of surface coatings which are playing a notable part in the battle against corrosion. This article gives a general view of the varied applications for this type of coating, particularly the cold‐cured.

Details

Anti-Corrosion Methods and Materials, vol. 5 no. 5
Type: Research Article
ISSN: 0003-5599

Article
Publication date: 1 May 1973

F. Richardson

There are many advantages to be gained from the use of water, rather than toluene, or other typical solvents used in the application of epoxide resin paint systems, as the…

Abstract

There are many advantages to be gained from the use of water, rather than toluene, or other typical solvents used in the application of epoxide resin paint systems, as the comparison in table 1 shows:

Details

Pigment & Resin Technology, vol. 2 no. 5
Type: Research Article
ISSN: 0369-9420

Article
Publication date: 1 June 1999

Ian Lewin

This article describes the move towards integrated coating systems, where the coating and method of drying or curing are selected to ensure efficient coating processes, while…

310

Abstract

This article describes the move towards integrated coating systems, where the coating and method of drying or curing are selected to ensure efficient coating processes, while ensuring there is no reduction in the function of the coating itself. It briefly explores various methods of radiation curing and explains how these techniques can be used to meet production requirements and constraints and develop optimum coating solutions. There is also a brief case study, which describes the installation of an infra‐red system for pre‐heating steel drums in order to speed up a lacquering operation.

Details

Pigment & Resin Technology, vol. 28 no. 3
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 30 December 2020

Amruta Joglekar-Athavale, Ganapati Shankarling, Satishchandra Dubey, Vinita Deshpande, Bikashkumar Jaiswal and Arun Nayak

The spectrally selective solar absorption paint is prepared from spinel-based mixed metal oxides with inorganic binder as a key component. Inorganic binder (furnace cement) is…

Abstract

Purpose

The spectrally selective solar absorption paint is prepared from spinel-based mixed metal oxides with inorganic binder as a key component. Inorganic binder (furnace cement) is blended with mixed metal oxide pigment during synthesis. High temperature stability upto 1,100ºC is achieved by the use of this modified coating system. The purpose of this paper is to work on solar selective coating synthesis, and application of a coating as a water-borne paint is the additive key feature that helps in reduction of solvent use.

Design/methodology/approach

The paint was formulated using water-based system, and the main component of colorant was made by mixed metal oxide–based spinel pigment and highly temperature stable inorganic binder.

Findings

The paint formed shows excellent absorptive power with low emittance even at high temperature. Optical and thermal properties were determined along with adhesion, abrasion and other properties. The solar absorptance for these samples were as = 0.93–0.95 with corresponding thermal emittance of eT = 0.096 (at room temperature) and 0.2–0.22 (at elevated temperature 100°C).

Originality/value

The paint formed shows excellent absorptive power with low emittance even at high temperature. The paint can be applied in solar absorptive tower system. The obtained results indicated excellent thermal stability of prepared paint coatings. As inorganic binder was used, the paint has reduction in solvent use, and being water as a base, it is environment friendly, easy to apply and durable at high temperatures, as the binder itself is stable up to 1,500ºC.

Details

Pigment & Resin Technology, vol. 50 no. 4
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 1 November 1989

New electrical paint curing method wins first place in Category 2 of Midlands Electricity's 1989 PEP Awards for Bromyard company.

Abstract

New electrical paint curing method wins first place in Category 2 of Midlands Electricity's 1989 PEP Awards for Bromyard company.

Details

Pigment & Resin Technology, vol. 18 no. 11
Type: Research Article
ISSN: 0369-9420

Article
Publication date: 1 May 1995

Ink transfer means for printing machine. In GB patent 2278574 David Edward McManamon describes an ink transfer means for a printing machine. It includes an application roller to…

Abstract

Ink transfer means for printing machine. In GB patent 2278574 David Edward McManamon describes an ink transfer means for a printing machine. It includes an application roller to receive ink from an ink rail and transfer ink to print rollers for printing. A pair of wiper rollers are provided above and below the centre of the application roller and in close proximity to the surface. The wiper rollers are driven in opposite directions so that they effectively wipe the surface of the application roller. This prevents build up of ink and the associated ink misting, irrespective of the direction of rotation of the application roller.

Details

Pigment & Resin Technology, vol. 24 no. 5
Type: Research Article
ISSN: 0369-9420

Article
Publication date: 1 August 1999

Ian Bartley

This article describes the background to the widespread application of infrared radiation as a curing technique for paints and coatings, from its origins in the 1930s to the…

Abstract

This article describes the background to the widespread application of infrared radiation as a curing technique for paints and coatings, from its origins in the 1930s to the present day. It explains the mechanism of infrared and elaborates on some of the developments which have been made in the technology, especially in terms of control and response. The benefits of infra‐red drying and curing are further illustrated by reference to case studies demonstrating infrared in action.

Details

Pigment & Resin Technology, vol. 28 no. 4
Type: Research Article
ISSN: 0369-9420

Keywords

1 – 10 of over 3000