November 16, 2004

Jotun introduces new antifoulings

Jotun Coatings has introduced three new TBT-free antifoulings that it describes as "targeting the cost-sensitive market."

The new SeaForce 30, SeaForce 60 and SeaForce 90 antifoulings are offered as cost effective high solid self-polishing products with a life span between 36 months for SeaForce 30 and 60 months for SeaForce 60 and SeaForce 90.

The products complement Jotun's high-end SeaQuantum (which uses a hydrolizing mechanism and is thus self-smoothing as well as self-polishing).

The SeaForce range offers features, normally only achieved by hydrolyzing antifoulings such as SeaQuantum. Main benefits for the SeaForce series include: linear polishing rate, high antifouling performance predictability, reduced leached layer thickness as well as high volume solids (58%).

SeaForce uses a patent pending Polymer Plasticizer Technology (PPT).

SeaQuantum is based on a silyl polymer, incorporating environmentally acceptable active ingredients with flexible hydrolyzing acrylic polymers. Most other types of antifoulings, however suffer from eventually becoming hard and brittle and thus need a film modifier.

A film modifier traditionally consists of either extremely large fibers to reinforce the paint film, resulting in a three dimensional network, or, more often, uses flexible polymers and low molecular weight plasticizers, to allow for optimal mechanical properties.

Low molecular weight plasticizers, though, are so small that they have a tendency to migrate, resulting not only in losing the intended effects, but also becoming harmful when migrating from the paint. The low molecular weight plasticizers have also been identified as "hormone analogs", that copy the structure of hormones so closely that they can be harmful for human health. And they may contain large levels of chlorine and thus be harmful to the environment.

Jotun claims to have finally solved the challenge of developing an acceptable film modifier, guaranteeing optimum mechanical properties, while, at the same time, not threatening the environment or life. The new Polymer Plasticizer Technology (PPT) consists of a combination of unique polymeric plasticizers. Being polymeric (i.e. large) in nature, they cannot migrate and thus remain fixed within the film. At the same time, their structure is specially designed to remain stable throughout the lifetime of the coating and thus continue to function as intended throughout the entire life span of the antifouling.

An important additional feature for the new polymers is the fact that they can be tailor-made, allowing other properties to be built into the structure. One benefit, for example, is the ability to select building blocks (monomers) in a combination that assists in reducing the thickness of leached layers.

"SeaForce is a good example of Jotun following market demand to develop our next generation TBT-free antifouling. SeaForce improves and simplifies Jotun's antifouling range, now meeting the full spectrum of customer requirements," says Bjoern Wallentin, Product Manager Antifoulings.

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