Underwater biocidal wax composition and preparation thereof
First Claim
1. A wax-based antifouling coating composition wherein said wax matrix composition comprises from about 16 to 26 weight percent of a chlorinated wax having an average number of carbon atoms from about 11 to about 13 and a chlorine content from about 65 to about 70 percent, from about 8.5 to about 11.5 weight of a chlorinated wax having an average number of carbon atoms from about 22 to about 26 and a chlorine content from about 39 to 45 percent, from about 8 to 12 weight percent of a chlorinated wax having an average number of carbon atoms from about 11 to 13 and a chlorine content from about 55 to about 65 percent, and from about 9 to about 13 weight percent of a chlorinated wax having an average number of carbon atoms from about 18 to about 22 and a chlorine content from about 36 to about 44 percent.
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Accused Products
Abstract
A biocidal wax composition for preventing corrosion and biological foulingnd surface degradation of submerged structures comprises from about 10 to about 40 percent of total biocidal wax composition of a biocidal polymeric gel consisting of a polymer from the group consisting of a polyethylene, polypropylene, a copolymer of polyethylene and vinyl acetate, and mixtures thereof and a solvent selected from the group consisting of mineral oil, a paraffin wax and mixtures thereof, and a biocide; and from about 60 to about 90 percent of total biocidal wax composition of a wax matrix composition consisting of petrolatum, at least two chlorinated waxes, and a microcrystalline wax. The biocidal wax is prepared by shock-cooling a hot solution of a polymer through its cloud point, admixing a biocide with the gel, and admixing the above wax matrix composition with the gel.
32 Citations
7 Claims
- 1. A wax-based antifouling coating composition wherein said wax matrix composition comprises from about 16 to 26 weight percent of a chlorinated wax having an average number of carbon atoms from about 11 to about 13 and a chlorine content from about 65 to about 70 percent, from about 8.5 to about 11.5 weight of a chlorinated wax having an average number of carbon atoms from about 22 to about 26 and a chlorine content from about 39 to 45 percent, from about 8 to 12 weight percent of a chlorinated wax having an average number of carbon atoms from about 11 to 13 and a chlorine content from about 55 to about 65 percent, and from about 9 to about 13 weight percent of a chlorinated wax having an average number of carbon atoms from about 18 to about 22 and a chlorine content from about 36 to about 44 percent.
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7. A method of preparing a wax-based antifouling coating composition which comprises:
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preparing a polymeric gel of a biocidal by admixing a polymer selected from the group consisting of polyethylene, polypropylene, a copolymer of polyethylene and vinyl acetate, and mixtures thereof, said polymer having an average particle size not in excess of about 5 micrometers, with a solvent at a temperature about the cloud temperature to from a hot concentrated solution of said polymer;
shock-cooling said solution to about 10 degrees C. below the cloud temperature;
allowing said solution to cool in room temperature; and
admixing a biocidal with said gel;preparing a wax matrix composition by admixing petroleum, chlorinated waxes, and a microcrystalline wax; heating said wax matrix composition to a temperature from about 50 degrees C. to about 60 degrees C.; admixing said wax matrix composition with said biocidal gel to from said biocidal wax composition; and cooling said biocidal wax composition to room temperature.
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Specification