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Does the decreasing VOC levels and the increasing restrictions mean lower profits for the coating contractor? Not necessarily. Today, there are new very low VOC, and evenzero VOC, coatings that meet performance standards of the more traditional coatings withwhich we are accustom to using.
Does the decreasing VOC levels and the increasing restrictions mean lower profits for the coating contractor? Not necessarily. Today, there are new very low VOC, and even zero VOC, coatings that meet performance standards of the more traditional coatings with which we are accustom to using. These new technologies can also provide an opportunity to utilize different surface preparation methods which can save both time and money and can present a substantial benefit to both the coating contractor and the owner.
Bis-Phenol A epoxy resin-based coatings are known for excellent corrosion and chemical resistance. Limitations of this class of coatings are poor flexibility, thermal stability and weather resistance. Traditional siloxane resins are commonly used in the industry to improve the thermal and weather resistance of bis-Phenol A epoxy coatings. In addition, organo-functional silicone polymers have been used to provide improved flexibility, but create recoatability issues.
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Due to very severe conditions at offshore, conventional coatings do not work as they require multicoats to acquire high thickness and their curing times are rather high, giving chances for the contamination by severe environment (high RH and salt) in the intermediate layers. Thus, modern coatings which can give larger thickness in just one single coat and cure in a few minutes time are required for critical applications such as splash zone which is marred by continuous dry and wet spell.
Organic modified polysiloxanes are generally recognized as the newest generic class of high-performance protective coating. They have gained commercial acceptance over the last ten years and are now widely used in new construction, heavy duty OEM, marine and industrial maintenance painting. This paper provides an overview of the technology, describes the available types of polysiloxane modified organic coatings and their properties and briefly discusses some recent advances in the field.