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In recent years numerous pieces of environmental legislation have been introduced or will be introduced both in the UK and throughout Europe. The greatest environmental issue at the moment is the limitation of volatile organic compound (VOC) emissions. Water‐based coatings have been available for many years; their main application initially was for broad wall paints. More recently, water‐based coatings have come on the market for trim coatings. Although their performance for interior use is sufficient, but inferior to their solvent‐based alternatives, how do water‐based coatings for exterior wood perform? An alternative to water‐based technology is high solids. In a recent life cycle analysis (Ministry of the Environment in France) high solids alkyds have been shown to have low environmental impacts. In the study used for setting the criteria and thresholds for the European eco‐label for decorative paints and varnishes, a high solids alkyd developed by Cray Valley Ltd was put into the category having the lowest environmental impact together with water‐based paints. For the future of exterior coatings for wood, is the route to environmentally friendly coatings water‐based or solvent‐based technology?

Powder coatings are well established as a finishing technique in the automotive component market worldwide. These coatings offer benefits such as toughness and chip resistance. As the performance demands on powder coatings have increased then powder has continually risen to the challenge. Flexible coatings are supplied for brake tubing, machinable coatings for engine blocks and a new class of advanced durability powder offering resistance to five years of Florida weathering has recently been introduced. The new class of advanced durability powders offer significant advantages over most paint finishes for exterior durability while retaining all the traditional performances and application advantages of powder coatings.

Coatings are subject to photoaging during their lifetime. Ultraviolet radiations absorbing additives (UVAs) and hindered amine light stabilisers (HALS) often are added to improve their performance. To improve performance of coatings, it is important to use optimum quantity of such additives.

In this study, hydroxyl‐terminated polyester was synthesised and then crosslinked using isophoronediisocyanate. These clear coats were then stabilised with various additives such as Tinuvin 1130, 123 and 292. The synergistic effect of these additives was also studied. The optical properties of coatings such as yellowness, whiteness and gloss of coatings were studied after exposing these coatings to various environments such as QUV weathering, direct UV and xenon arc.

The results showed that the coatings stabilised with combination of additives performed better than the unstabilised coatings as well as single additive coatings. A synergism was observed when using a combination of the UVAs and HALS.

The additives used were found to be compatible with the binder systems under study and was not found to be universally compatible with all resins.

UV degradation is a major concern in coatings both aesthetically and functionally. This study aimed at optimising the concentrations of UV stabilisers in order to increase the effective life time of exterior coatings.

UV stabilisers are routinely used in coatings for exterior applications. However, our aim was to optimise the concentrations of these additives in the coating so as to reduce the cost while keeping the performance of the coatings unaffected. By studying the synergy of the additives, we have also optimised their concentrations to further increase the life of the coatings.

An introduction to the topic of aqueous silicone resin coating systems for exterior masonry. Concentrates on applications in the construction industry.

Powder coatings were originally product led, depending entirely on the resins available (epoxy, epoxy polyester). Now more market led coatings are required for specific properties for certain applications. In Europe powder coatings have gained more share of the general industrial paint market and there has been a move away from TGIC during the last two years. Low temperature resins are now more popular and superdurable resins give extended durability. Deals particularly with speciality finishes.

The introduction of new products becomes increasingly more expensive, and the newer the product the greater the risk. In the chemical industry generally, there appears to be no real incentive these days to take large risks. Indeed, several of the large chemical companies have indicated that they will not undertake dramatically new programmes in the foreseeable future. Rather they will concentrate on the products and lines of business with which they are familiar and will try to do a better job in product control, technical service, marketing, and distribution. The general feeling, in the coatings industry, is that there will be many variations on old themes but very few new paints.

The Akzo Chemicals stand will display its full range of chemicals for coatings applications.

The lead content of paint continues to be a hotly discussed issue in the industry. Water pollution and air pollution also continue to be worrisome problems. A large amount of literature is accumulating in these areas, some of which will be reviewed here.