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WO 2008/074015 Al (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date PCT (10) International Publication Number 19 June 2008 (19.06.2008) WO 2008/074015 Al (51) International Patent Classification: (74) Agent: SHEAR, Stephen, B.; CHURCH & DWIGHT AOlN 25/00 (2006.01) CO., INC., Law Dept. - Patents, 469 North Harrison Street, Princeton, NJ 08543-5297 (US). (21) International Application Number: PCT/US2007/087465 (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, (22) International Filing Date: AT,AU, AZ, BA, BB, BG, BH, BR, BW, BY,BZ, CA, CH, 13 December 2007 (13.12.2007) CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, (25) Filing Language: English IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY,MA, MD, ME, MG, MK, MN, MW, (26) Publication Language: English MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SV, SY, (30) Priority Data: TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, 60/870,041 14 December 2006 (14.12.2006) US ZM, ZW (71) Applicant (for all designated States except US): (84) Designated States (unless otherwise indicated, for every CHURCH & DWIGHT CO., INC. [US/US]; 469 kind of regional protection available): ARIPO (BW, GH, North Harrison Street, Princeton, NJ 08543-5297 (US). GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), (72) Inventors; and European (AT,BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, (75) Inventors/Applicants (for US only): BOLKAN, Steven, FR, GB, GR, HU, IE, IS, IT, LT,LU, LV,MC, MT, NL, PL, A. [US/US]; 96 Stony Brook Road, Hopewell, NJ 08525 PT, RO, SE, SI, SK, TR), OAPI (BF, BJ, CF, CG, CI, CM, (US). LOGAN, Andrew, Jr. [US/US]; 9 Old Stirling GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). Road, Warren, NJ 07059 (US). CZECHOWSKI, Melvin, H. [US/US]; 13 Bogey Circle, Doylestown, PA 18901 Published: (US). — with international search report (54) Title: WATER SOLUBLE MEDIA CONTAINING ANTI-MICROBIAL AGENTS (57) Abstract: The present invention relates to method for killing various mold spores appearing on a surface by applying a compo- sition comprising water soluble blast media and antimicrobial agent to the surface. The composition can be applied by a pressurized blasting apparatus or can be applied directly by any coating method. The composition can be immediately rinsed off the surface or applied directly to a surface and allowed to set and stay in contact with mold and mold spores. WATER SOLUBLE MEDIA CONTAINING ANTI-MICROBIAL AGENTS CROSS-REFERENCE TO RELATED APPLICATION This application is related to U.S. Provisional Patent Application Serial No. 60/870,041 filed December 14, 2006 and takes priority therefrom. FIELD OF THE INVENTION The present invention relates to methods of treating various mold spores appearing on a surface by applying a composition comprising alkalai metal bicarbonate and antimicrobial agent to the surface so as to kill and retard the growth of mold spores. DESCRIPTION OF THE PRIOR ART Concern about indoor exposure to mold has been increasing as the public becomes aware that exposure to mold can cause a variety of health effects and symptoms. Molds can produce allergens that can trigger allergic reactions or even asthma attacks in people allergic to mold. Others are known to produce potent toxins and/or irritants. Potential health concerns are an important reason to prevent mold growth and to remediate/clean up any existing indoor mold growth. Molds reproduce by making spores that usually cannot be seen without magnification. Mold spores waft through the indoor and outdoor air continually. When mold spores land on a damp indoor area, the spores may begin growing and digesting whatever media such as spores are growing on in order to survive. Molds gradually destroy the area on which the spores grow. Mold spores can be found in the air and on nearly every surface in a home, but generally a consistent source of moisture is required for mold to grow. Molds can grow on virtually any organic substance, as long as moisture and oxygen are present. There are molds that can grow on wood, paper, carpet, foods, and insulation. Many types of molds exist. Molds such as mold, fungus mold, and slime molds are most often found in areas that have high humidity levels such as bathrooms, kitchens, laundry rooms or damp basements (especially after flooding). Molds are a type of microscopic fungus that grow naturally indoors. The most common household mold types include Aspergillus, Cladosporium, Penicillium and Alternaria. Stachybotrys chartarum, often referred to as black mold, is less common than the molds listed above and is the type of mold commonly dealt with in home remediations. In order to clean a solid surface so that such surface can again be coated such as, for example, to preserve metal against deterioration, remove graffiti from stone or simply to degrease or remove dirt from a solid surface, it has become common practice to use an abrasive blasting technique wherein abrasive particles are propelled by a high pressure fluid against the solid surface in order to dislodge previously applied coatings, scale, dirt, grease or other contaminants. Various abrasive blasting techniques have been utilized to remove coatings, grease and the like from solid surfaces. Thus, blasting techniques comprising dry blasting which involves directing the abrasive particles to a surface by means of pressurized air typically ranging from 30 to 150 psi, wet blasting in which the abrasive blast media is directed to the surface by a highly pressurized stream of water typically 3,000 psi and above, multi-step processes comprising dry or wet blasting and a mechanical technique such as sanding, chipping, etc. and a single step process in which both air and water are utilized either in combination at high pressures to propel the abrasive blast media to the surface as disclosed in U.S. Pat. No. 4,817,342, or in combination with relatively low pressure water used as a dust control agent or to control substrate damage have been used. Water for dust control has been mixed with the air either internally in the blast nozzle or at the targeted surface to be cleaned and such latter process, although primarily a dry blasting technique, is considered wet blasting inasmuch as media recovery and clean up is substantially different from that utilized in a purely dry blasting operation. The blast media or abrasive particles most widely used for blasting surfaces to remove adherent material therefrom is sand. Sand is a hard abrasive which is very useful in removing adherent materials such as paint, scale and other materials from metal surfaces such as steel. While sand is a most useful abrasive for each type of blasting technique, there are disadvantages in using sand as a blast media. For one, sand, i.e., crystalline silica, is friable and upon hitting a metal surface will break into minute particles which are small enough to enter the lungs. These minute silica particles pose a substantial health hazard. Additionally, much effort is needed to remove the sand from the surrounding area after completion of blasting. Still another disadvantage is the hardness of sand itself. Thus, sand cannot readily be used as an abrasive to remove coatings from relatively soft metals such as aluminum or any other soft substrate such as plastic, plastic composite structures, concrete or wood, as such relatively soft substrates can be excessively damaged by the abrasiveness of sand. Moreover, sand cannot be used around moving parts of machinery inasmuch as the sand particles can enter bearing surfaces and the like. An alternative to sand as a blast media, particularly, for removing adherent coatings from relatively soft substrates such as softer metals as aluminum, composite surfaces, plastics, concrete and the like is sodium bicarbonate. While sodium bicarbonate is softer than sand, it is sufficiently hard to remove coatings from aluminum surfaces and as well remove other coatings including paint, dirt, and grease from non-metallic surfaces without harming the substrate surface. Sodium bicarbonate is not harmful to the environment and is most advantageously water soluble such that the particles which remain subsequent to blasting can be simply washed away without yielding environmental harm. Since sodium bicarbonate is water soluble and is benign to the environment, this particular blast media has also found increasing use in removing coatings and in cleaning dirt, grease and oil and the like from harder surfaces as well including steel and interior surfaces such as those which contact food such as in environments of food processing or handling. Sodium bicarbonate is also a friable abrasive and, like sand, will form a considerable amount of dust during the blast cleaning process. To control the dust formed by the sodium bicarbonate blast media as it contacts the targeted surface, water is included in the pressurized fluid carrier medium. Thus, water can be used as the carrier fluid or, more preferably, injected into a pressurized air stream which carries the blast media from the blast nozzle to the targeted surface. Water as a means to control dust has been mixed with the air stream internally in the blast nozzle or into the air stream externally of the nozzle. The addition of water to the pressurized air stream has been very effective in controlling dust formed by the sodium bicarbonate blast media.
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