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With the support of our adroit team of experts, we are able to offer our clients superior quality Antifouling Chemical. It is used to deter biofouling of underwater structures and marine vessels present a serious environmental issue. In addition, our offered Antifouling Chemical is processed in hygienic environment by making use of accurate amount of chemicals in compliance with the defined industry standards.
Antifouling paints are generally applied on any wet surface to prevent growth of microorganism and algae that have damaging effect on a specific surface. The anti fouling properties of shipbottom paints remain effective for a certain period. The commercially produced paints can inhibit generation of odor for only three to six months under subtropical environment. The plastic antifouling coating used in marine industry provides long lasting result in inhibiting fouling. The marine department uses this type of coating to avoid formation of rust on hull surface and the effectiveness of applied coating depends on its thickness level.
The long lasting quality of anti fouling coating depends on its water erosion rate and its mechanical damage resistance capacity. It has been noticed that waste materials present in sea water may have damaging effect on this paint. To improve the effectiveness of this paint, special care needs to be taken during selection of its raw materials like mercury, slats of copper and metallic copper of this paint may generate rust on applied steel surface. Studies have proved that 5 mils of coating of cold plastic anti fouling paint can successfully prevent corrosion for around one year and three months. On the other hand, the application of 30 mils coating of hot plastic anti fouling coating can protect any surface for a minimum period of thirty months.
An ideal anti fouling paint should make smoothness of vessel surface to minimize its friction resistance capacity and evenness of any coated surface depends on various properties of this paint. Thickness of coating has also a key role in reducing fouling and extending service life of high speed boat or vessel. Moreover, a thick layer of paint is useful for covering any irregular condition of boat surface.
Spray or brush should be used to apply this paint. The cold and hot plastic paints that have extensive applications in Navy are applied by adopting spray painting method irrespective of climactic condition.
An ideal anti fouling paint should get dry within a short span of time as vessel painting is a time consuming work that involves stages like cleaning of vessel surface. In some cases, multiple layer of anti fouling coating helps to extend working life of vessel. The selection of suitable color of anti fouling paint determines the effectiveness of its foul resistance capacity.
As far as the cost of this paint is concerned, it can be said that its synthetic resin based variant is quite costly than its natural resin based form.
Classifications of Anti Fouling Paint
Based on the composition, the anti fouling paint can be classified in two categories. Paint made of sea water insoluble matrices consists of higher amount of toxin to effectively deal with toxic elements of saline water. This type of paint consists of durable quality binder and higher amount of toxic pigment like water protected varnishes and polyvinyl resins. It also contains cellulose derivatives, chlorinated rubber and alkyd resins. The resin content here acts as a good binding agent and its properties can be adjusted by combining it with other substances or by plasticizing it. Toxic elements like cuprous oxide and metallic copper are usually used to formulate sea water insoluble matrices based anti fouling paint. The erosion protected films present in this paint is truly effective in inhibiting fouling on long term basis. Due to their costly pigment content with high loading capacity, this type of paint is quite expensive.
The other variant of this paint consists of soluble matrices that are formulated from resin based sea water soluble elements for effective removal of toxic content. This type of paint consists of matrix like pine oil and zinc stearate and pigments like zinc oxide and cuprous oxide. The anti fouling paint s used by Navy department contains sea water dissolvable matrices like cuprous oxide and rosin paraffin. This paint is formulated from hot plastics in its molten form which is later cooled. The paraffin content in this paint serves as a plasticizing agent which is instrumental in lowering viscosity level of the molten paint. Spray painted technique is adopted for the application of this paint. The equipment developed by Navy to spray this paint is useful for coating of paint film of 20 to 50 mils with only a single coat. This type of film is truly effective in inhibiting fouling of boats or vessels for up to five years for its fast solidification rate. The application of this paint under 40 degree F temperature is quite difficult.
The effectiveness of soluble matrix type anti fouling paint remains intact for more than a year. Known for its affordable price, its manufacturing as well as application process is simple. But it needs to be remembered that the water erosion resistance properties of this paint is not up to the mark. This paint is not suitable to apply on vessels with high floating speed. The paint formulated as per 15 RC is capable of inhibiting fouling for a short duration. The 16X formula based paint can prevent fouling for above one year. All the above mentioned paints need to be applied either spraying or by using brush. Moreover, these can be applied under cold weather condition and these can be applied without any surface preparation.
Ingredients that are generally used in anti fouling paints
The matrix of this type of paint consists of a resin based substance that helps in solidification of coating film, plasticizers to enhance flexibility of paint and some special types of compounds with large molecules to boost erosion prevention capacity of paint. The attributes like solubility in saline water is regarded as an important factor in determining standard grade of anti fouling paint. One such soluble matrix element is resin which is present almost in all sorts of soluble matrix based antifouling paints. The soluble as well as insoluble matrix ingredients may contain similar element like vinyl resin to boost the attributes of the formulated paint.
Natural resins: Derived from pine trees, the natural resin is considered as an ideal ingredient for soluble matrix. The commercial form of resin is categorized on the basis of its color. As per studies, except B and FF resin, all sorts of wood resin and gum resin are perfect for using in the formulation of matrix for anti fouling paint. The shellac resin of Indian origin is a type of natural resin, is extensively used for this purpose.
Treated natural resins:
Most of the treated natural resins are not soluble in water due to their equitable quality. As for instance, ester gum which is insoluble in saline water is reckoned for its neutral features. The addition of low amount of this resin helps to boost performance of anti fouling coating. Copper resinate is another ingredient of this type of paint. This specific element is slightly soluble in saline water and it acts as a good plasticizer. The hydrogenated ethyl abietate or methyl abietate is another important resin based ingredient of anti fouling paint. Modified forms of rubber resins like chlorinated synthetic rubber are also included in the list of treated natural resin.
Also referred as aklalyd resins, the synthetic resins are produced as a result of reaction between polybasic acids and polyhydric alcohols. These types of resins are especially used to formulate underwater paint. The softer variant of coumarone resins are utilized as suitable plasticizer to formulate anti fouling paint. The modified form of phenolic resins is used as essential ingredients of solvent type and hot melt based antifouling coating. The polyvinyl butyral and vinyl chloride acetate copolymer that are classified as vinyl resins are used as effective anti fouling coating elements that can endure harsh saline water for their unique toughness level. In fact, these act as binding agents in anti fouling paints. During storage of this paint, its polyvinyl butyral resin content may take the form of gel due to the reaction between heavy toxic metal content and residual hydroxyl type of resin.
Drying oils like tung, dehydrated castor, chinawood and linseed oils are chosen as suitable varnish medium for producing insoluble matrix of anti fouling paints. The plasticized resin enriched variant of this paint consists of fish oil, china wood and bodied linseed.
Tar Products: Tar based materials like creosote, bitumen and pitch are also used as suitable ingredients of anti fouling paint for their unique wood preservation capacity. The tar content of this paint enables it to safeguard wet wooden surface against woodborers like Llimnoria and Teredo.
Pigments are used as essential parts of anti fouling paint as their toxin content as a key role in inhibiting fouling of applied surface and reinforcing the layer of applied coating. At present, specially formulated cost effective non toxic pigments are utilized to make this paint long lasting and improving the look of painted surface.
As per studies, the toxic content of anti fouling paint includes arsenic, mercury and copper. Presence of bronze has also been noticed in this type of paint. The copper based pigments like cupric oxide is not easily soluble and it does not provide the desired toxic level required for making anti fouling paint long lasting.
Pigment like cuprous oxide is a powerful toxic pigment which is commonly added in the formulation of this paint. Pigments like diatomaceous silica and magnesium silicate are included in the formulation of anti fouling paint to prevent its lump formation. Pigments like Paris Green is acknowledged as an effective pigment for hot plastic based anti fouling paint for its arsenic and copper content.
The mercury based pigment is considered to be two or three times more effective than its copper based counterpart in terms of its leaching level. Mercury based pigments are used for manufacturing of light colored coating materials for painting of aircraft. Being soluble in saline water, the mercuric oxide is useful for checking fouling and improving leaching rate of anti fouling paint.
As per researches, the British proprietary paint contains 67% arsenic and in American proprietary paint, its amount is 33%. Ingredients like organic toxins present in anti fouling paint are appreciated for their corrosion prevention capacity. There are also some non toxic pigments that are used to enhance effectiveness of anti fouling paint. Such pigments include zinc oxide, iron oxides, magnesium silicate, dust zinc and silica that are used to formulate shipbottom paints. Besides these, chrome yellow and chrome green are also used for formulation of anti fouling paint. As per the study of the British Iron and Steel Institute, zinc oxide and red iron oxide are the most commonly used ingredients for this paint.
In brief, it can be said that non toxic pigment based anti