Search results

1 – 10 of over 5000
Article
Publication date: 1 December 1972

Americus

The number of articles on solvent‐based acrylic resins in the paint industry has decreased in the past two years. It is not entirely clear why this is, since acrylic resins serve…

Abstract

The number of articles on solvent‐based acrylic resins in the paint industry has decreased in the past two years. It is not entirely clear why this is, since acrylic resins serve a key function in the industrial coatings segment of the paint industry, because of their outstanding weathering performance. The fact that they are available in both thermoset and thermoplastic forms makes them highly versatile. Structurally they are capable of wide variation, as indicated by an article by Ailhaud [Peintures, Pigments, Vernis, 47, March (1971) p. 170] who reports on the properties of block copolymers based on a variety of different alkyl methacrylates.

Details

Pigment & Resin Technology, vol. 1 no. 12
Type: Research Article
ISSN: 0369-9420

Article
Publication date: 5 July 2011

R. Otáhal, D. Veselý, J. Násadová, V. Zíma, P. Němec and P. Kalenda

The purpose of this paper is to study properties of intumescent coatings based on a silicone‐epoxy hybrid resin (with an aminosilane as hardener). In the first part of this study…

Abstract

Purpose

The purpose of this paper is to study properties of intumescent coatings based on a silicone‐epoxy hybrid resin (with an aminosilane as hardener). In the first part of this study, fire‐resistance behaviour of the intumescent coating based on silicone‐epoxy resin containing intumescent additives is evaluated. The second part assesses the effect of mineral fibres on fire‐resistant properties of intumescent coatings based on the silicone‐epoxy resin.

Design/methodology/approach

Thermal degradation and char formation of coatings were investigated by Thermogravimetric analyses, X‐ray diffraction and X‐ray fluorescence and infrared spectroscopy (FTIR). The salt spray corrosion test was applied to study the resistance of intumescent coatings. Anticorrosion and fire‐resistant properties after one, three and seven days of exposure were evaluated.

Findings

It was shown that a silicone‐epoxy hybrid resin is suitable for applications in the field of intumescent coatings. Intumescent coatings based on this resin form a thermally stable thin ceramic‐like layer, which improves the thermal insulation properties of the char. Mineral fibres reinforced the char structure and thus improved fire‐resistant properties of intumescent coating before as well as after the salt spray test. Mineral fibres also improved anticorrosion properties.

Research limitations/implications

This paper discusses only the effect of mineral fibres on properties of intumescent coatings.

Originality/value

A silicone‐epoxy hybrid resin has not previously been used in intumescent coatings. This type of intumescent coating can be used as an effective passive fire protection system for steel constructions.

Details

Pigment & Resin Technology, vol. 40 no. 4
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 1 May 1983

Americus

Epoxy resins have probably provided more interesting chemistry than any other polymer the paint industry uses. In this category of interesting chemistry is Russian work [World

Abstract

Epoxy resins have probably provided more interesting chemistry than any other polymer the paint industry uses. In this category of interesting chemistry is Russian work [World Surface Coatings Abstracts (1978) Abstract No. 1558] which describes the preparation of structurally coloured epoxy resins — i.e. of epoxy resins which are inherently coloured. The work involves condensing bisphenol A and epichlorohydrin in the presence of small amounts (0.1 to 0.5 weight per cent) of a coloured co‐monomer dye. The dye, for example, can be the glycidyl ether of alpha aminoanthroquinone. Coloured products resulted which presumably would provide coatings with intrinsic colour. Of course, this colour could be modified by extrinsic dyes and pigments. The concept of producing coloured polymers is not a new one. One approach to making black polyethylene for black film is to carry out the polymerisation of the ethylene in a fluid bed of carbon particles. The carbon particles presumably serve as a nucleus around which the polymer forms and at the same time serves to impart a black colour to the polymer particle. This technology has never been commercialised but it is certainly of interest to the paint chemist for it presents a new concept in carrying out a major objective of the paint industry — namely, to impart colour to solutions of polymers.

Details

Pigment & Resin Technology, vol. 12 no. 5
Type: Research Article
ISSN: 0369-9420

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 around…

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

Article
Publication date: 19 September 2023

Xingbing Yang, Xinye Wang, Shuang Huang, Xin Liu, Xiang Huang and Ting Lei

In this study, solid formaldehyde, benzoguanamine and butanol were used to synthesize butylated benzo-amino resin by one-step-two-stage method.

Abstract

Purpose

In this study, solid formaldehyde, benzoguanamine and butanol were used to synthesize butylated benzo-amino resin by one-step-two-stage method.

Design/methodology/approach

This research first examined the influence of solid formaldehyde content on the hydroxymethylation phase. Subsequently, the effects of butanol content, etherification time and hydrochloric acid content on the formation of benzo-amino resin during the etherification stage were studied in detail. In addition, the reaction process was further analyzed through interval sampling withdrawing during the hydroxymethylation and etherification stages. Finally, the synthesized benzo-amino resins were used in the production of high solid content polyester and acrylic coatings and the properties of that were also evaluated.

Findings

Based on the experimental findings, the authors have successfully determined the optimal process conditions for the one-step-two-stage method in this study. The hydroxymethylation stage demonstrated the most favorable outcomes at a reaction temperature of 60°C and a pH of 8.5. Similarly, for the etherification stage, the optimal conditions were achieved at a temperature of 45°C and a pH of 4.5. Furthermore, the investigation revealed that a ratio of benzoguanamine to solid formaldehyde to n-butanol, specifically at 1:5.2:15, produced the best results. The performance of the resulting etherified benzo-amino resin was thoroughly evaluated in high solid content coatings, and it exhibited promising characteristics. Notably, there was a significant enhancement in the water resistance, solvent resistance and glossiness of canned iron printing varnish coatings.

Originality/value

Amino resin, a versatile chemical compound widely used in various industries, presents challenges in terms of sustainability and operational efficiency when synthesized using conventional methods, primarily relying on a 37% formaldehyde solution. To address these challenges, the authors propose a novel approach in this study that combines the advantages of the solid formaldehyde with a two-stage catalytic one-step synthesis process. The primary objective of this research is to minimize the environmental impact associated with amino resin synthesis, optimize resource utilization and enhance the economic feasibility for its industrial implementation. By adopting this alternative approach, the authors aim to contribute toward a more sustainable and efficient production of amino resin.

Details

Pigment & Resin Technology, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 1 October 1979

Americus

Behind every successful technology is a great body of scientific knowledge. The paint industry managed to get along pretty well from the time of the Egyptians until World War I, a…

Abstract

Behind every successful technology is a great body of scientific knowledge. The paint industry managed to get along pretty well from the time of the Egyptians until World War I, a span of approximately 5,000 years, without much scientific insight. Indeed, the empirical approach to paint formulation could hardly be criticised. When one visits museums of Egyptology today, one sees coatings formulated three to five thousand years ago which are bright coloured and which still have good adhesion and film integrity. But coating mummy cases in a very dry climate is considerably less demanding than coating missiles which find themselves in a hostile environment. Although paint for mummy cases, houses, and barns and even the first assembly‐line‐produced automobiles could be made without much scientific understanding, it is fair to say that coatings for the exacting demands of modern technology could never have evolved without an understanding of the scientific principles on which the modern coatings industry is based. The scientific basis for the modern coatings industry is found in an understanding of polymer chemistry, an understanding of the chemistry of solvents, a knowledge of the chemistry of pigments, and a large body of physical chemistry relating to solubility, rheology, adhesion, cohesion, and many other important phenomena.

Details

Pigment & Resin Technology, vol. 8 no. 10
Type: Research Article
ISSN: 0369-9420

Article
Publication date: 1 December 1981

Americus

The coatings industry is based on a large number of scientific principles. To be sure, it developed both in ancient and modern times without regard to these. But once an empirical…

Abstract

The coatings industry is based on a large number of scientific principles. To be sure, it developed both in ancient and modern times without regard to these. But once an empirical body of knowledge was built up, it became obvious that theoretical underpinnings were not only desirable but necessary if progress were to be made. What are some of the scientific principles which govern coatings technology? Film formation is certainly one. What causes a film to form, and what affects the properties of a film such as cohesion, adhesion, gloss, flexibility, permeability, impact resistance, and a dozen other characteristics? The problem of understanding film formation became all the more important with the advent of waterborne paints, for polymer particles suspended in water are not nearly as prone to form films as are polymer solutes in a solvent.

Details

Pigment & Resin Technology, vol. 10 no. 12
Type: Research Article
ISSN: 0369-9420

Article
Publication date: 1 March 1975

Americus

The coatings industry is in large measure a function of the world around it. Advances in related disciplines are scrutinised carefully by coatings chemists because of the…

Abstract

The coatings industry is in large measure a function of the world around it. Advances in related disciplines are scrutinised carefully by coatings chemists because of the ramifications that these new discoveries and inventions may have if applied directly to the coatings area. This is certainly true relative to new resins and other raw materials. It applies also to the development of new energy forms which reflect themselves in new ways to cure coatings. Accordingly, some of these newer advances which could eventually have important ramifications in the coatings industry will be reviewed here.

Details

Pigment & Resin Technology, vol. 4 no. 3
Type: Research Article
ISSN: 0369-9420

Article
Publication date: 1 October 1981

Americus

The number of new alkyd resin‐based coatings introduced decreases yearly. To be sure, alkyd resins are the most important vehicles used for solvent‐based paints. On the other…

Abstract

The number of new alkyd resin‐based coatings introduced decreases yearly. To be sure, alkyd resins are the most important vehicles used for solvent‐based paints. On the other hand, the technology is mature and the major variations in the products are those which must be made to accommodate needs of the user. For the most part, these do not lead to completely new types of compositions.

Details

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

Article
Publication date: 1 January 1994

Reducing Level of Alcohol in Inks ‐ A medium‐sized US ink manufacturer recently needed to reduce the level of alcohol in its bases for water‐based inks. Ciba Geigy Pigments…

Abstract

Reducing Level of Alcohol in Inks ‐ A medium‐sized US ink manufacturer recently needed to reduce the level of alcohol in its bases for water‐based inks. Ciba Geigy Pigments Division's Inks Technical Centre developed an improved formulation, containing half the alcohol of the previous one and 40 per cent more pigment to allow the ink producer to meet VOC limits and increase production efficiency, at no additional cost.

Details

Pigment & Resin Technology, vol. 23 no. 1
Type: Research Article
ISSN: 0369-9420

1 – 10 of over 5000