MX2007001998A - Water-based asphalt coating composition - Google Patents

Abstract

The present invention relates to multi-part coating compositions that comprise a first part which is an asphalt emulsion comprising water, asphalt, and a dispersion system and a second part which is a liquid polymer composition that lacks water. The asphalt emulsion and liquid polymer composition are combined in situ to provide a coating that has fast dry characteristics, and that quickly develops good water-resistance. Such compositions are useful as coatings on metal, wood, and other surfaces, where fast drying characteristics are important. Such compositions are particularly useful as coatings on substrates where early water-resistance of the coating is important, such as those surfaces which are routinely exposed to the outdoors.

Description

COMPOSITION OF WATER BASED ASPHALT COATING BACKGROUND OF THE INVENTION Asphalt is inexpensive, has a relatively high penetration value when applied to most porous surfaces, and is relatively weather resistant and impervious to water. As a result, asphalt has traditionally been used as a major component of protective coatings, films and membranes. Water-based asphalt emulsions have been used for a wide array of products including waterproof membranes, pavement and roofing products, joint sealants, paints. Specialty, electric laminates and hot melt adhesives. In addition, water based asphalt emulsions have been used as diluents in the manufacture of low grade rubber products, as diluents for the disposal of radioactive waste, for hot dip coatings and for water retention barriers. For many of these applications, the water-based asphalt emulsion is modified by the inclusion of a hydrocarbon polymer such as natural rubber. The coating that results when such a modified product is applied to a substrate and allowed to dry has improved performance properties. Asphalt emulsions, in their most basic form, are made by melting solid asphalt, typically at a temperature between 99-149 ° C (210-300 ° F), and then mixing the molten asphalt with water and a dispersing system. Such mixing is typically done in a colloid mill under high speed and high shear stress. If the emulsion is to be used as a waterproof coating, hydrocarbon polymer emulsions / latexes such as natural rubber, styrene butadiene rubber (SBR), acrylic, etc., typically, are then added to these emulsions for give the properties that are desired. Since the resulting mixture (asphalt emulsion plus hydrocarbon polymer latex / latex) typically requires an alkaline stabilizer such as ammonium hydroxide, the coating compositions are often neutral to alkaline in nature. Although, it is also possible to add the desired hydrocarbon polymer emulsion to the asphalt emulsion in situ, this is more difficult and rarely done. Water-based asphalt emulsions, including those comprising an emulsion or suspension of hydrocarbon polymer such as a rubber latex, the evaporation of complete curing moisture and the subsequent coalescence of the dispersed particles. Although these materials are covered with thin film in a relatively short period of time, the thin film is generally not hard enough to withstand contact with water as in rain for outdoor applications. Rain erodes the thin film and wash away the uncured material below. Accordingly, the application instructions for such materials generally suggest not applying the emulsion to a substrate if rain is a possibility within several hours of application. On the other hand, the time required to completely cure the complete coating composition may be unacceptably long or not at all. Such difficulties limit the thickness of asphalt-based coating compositions that can be applied to the underlying substrate. Due to the long drying time, the standard practice in the industry is to add a salt, such as calcium chloride during the application to "break" the emulsions. The salt reacts with the ionic groups, in the emulsion, causing the emulsion to destabilize and coagulate faster. Non-water-based weather resistant coatings can also be prepared by combining polyurethane extenders and isocyanates to an asphalt material. However, the mixture has to be heated, generally, from 80 ° C to 120 ° C. Such methods are difficult to manage and require special equipment at the job site. ThereforeIt is desirable to have new systems and methods for preparing asphalt-based coatings based on water, films and membranes. Methods and systems that provide water-based asphalt coating compositions that dry more quickly are desirable, and thus achieve the fastest washout resistance. Also desirable are methods and systems that provide water-based asphalt-containing coating compositions with a relatively fast full cure. A rapid complete curing of the coating compositions takes into account the reduced time on a job site, faster weight bearing loads, faster pedestrian traffic without adverse effects on the physical integrity of the coating. In addition, rapid complete curing also allows a thicker layer of the coating composition to be applied as a single layer (i.e., in one stage) as opposed to multiple layers to achieve the same thickness. BRIEF DESCRIPTION OF THE INVENTION The present invention provides systems and methods for preparing a coating, membrane or film containing asphalt, based on water. The system comprises a first composition (hereinafter referred to as "Part A") and a second composition (hereinafter referred to as "Part B") to produce a water-based asphalt coating composition that can be applied to a vertical or horizontal substrate and heals relatively quickly without application of heat. The first composition of the system is an emulsion comprising asphalt, water and a dispersing system. The asphalt emulsion may further comprise other emulsions of organic polymers such as natural rubber, styrene-butadiene rubber, acrylic resins, polyvinyl acetate, and similar materials, or any combination thereof. These organic polymers are added to the asphalt emulsion to provide desired performance properties, including strength, adhesion, elasticity, and / or water vapor permeation. In certain embodiments, the solids ratios of the asphalt emulsion is from 35 to 65%. The second composition (Part B) is a viscous liquid that can be mixed with Part A. Part B comprises a liquid polymer composition, not an emulsion that lacks water. The system is based, at least in part, on the inventors' discovery that adding a relatively small amount of such a liquid polymer composition to a water-based asphalt emulsion in situ produces a coating composition that dries more rapidly as water-based asphalt emulsions whereby such liquid polymer composition has not been added. As a result, such coatings have increased the washout resistance. The inventors have also discovered that the addition of a relatively small amount of such a liquid polymer composition to a water-based asphalt emulsion in situ provides a faster-curing complete coating. Thus, when the present system is used a thicker layer of such coating can be applied to a substrate. The present invention also relates to methods of coating a substrate by combining Part A of the present system with Part B of the present system, and applying the resulting emulsion or mixture to the substrate. The present system can be used to coat a variety of substrates including, but not limited to concrete, wood, or metal. The resulting emulsion or mixture can be applied to the substrate by spraying, dipping, rolling, painting, or spreading. Depending on the solids content and the amount and type of the hydrocarbon polymer emulsion in Part A, Part A and Part B are combined in the ratio of 3: 1 or larger, preferably in a ratio of 17: 1 to 3 :1. The ratio is adjusted based on the desired thin film and the full curing time. The method can be used to form a coating of varying thickness, including, but not limited to, a solid layer coating that is more than 250 mils on a substrate, on a substrate. DETAILED DESCRIPTION OF THE INVENTION The present invention will now be described with occasional reference to the specific embodiments of the invention. This invention, however, can be incorporated in different forms and should not be construed as limiting the modalities set forth herein. Rather, these embodiments are provided so that this description will be detailed and complete, and will fully communicate the scope of the invention to those skilled in the art. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as they are commonly understood by one of ordinary skill in the art for which this invention pertains. The terminology used in describing the invention herein is to describe particular embodiments only and is not intended to be limiting of the invention. As used in the description of the invention and the appended claims, the singular forms "a", "an" and "he" are also intended to include plural forms, unless the context clearly dictates otherwise. All publications, patent applications, and other references mentioned herein are incorporated by reference in their entirety. Unless otherwise indicated, all numbers expressing quantities of ingredients, properties such as molecular weight, reaction conditions, and so on as used in the specification and claims are to be understood as being modified in all cases by the term "approximately". Accordingly, unless otherwise indicated, the numerical properties set forth in the following specification and claims are approximations that may vary depending on the desired properties seen to be obtained in the embodiments of the present invention. Although the numerical ranges and parameters that set out the broad scope of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors unnecessarily that result from the standard deviation found in their respective test measurements. Each numerical range given by all this specification will include each smaller numerical range falling within such a larger numerical range, as if such smaller numerical ranges were all expressly written in the present. A system for producing a weather-resistant coating or membrane with a fast full curing ratio is provided herein. The system comprises a water-based asphalt emulsion system (Part A) and a liquid polymer composition lacking water (Part B) to form a waterproof coating, and methods of making such a coating by combining Part A and Part B of this system. Part A of the composition may further comprise a hydrocarbon polymer emulsion such as a natural rubber, styrene-butadiene rubber, acrylic resin, polyvinyl acetate and similar materials or any combination thereof. In certain modalities, the ratio of Part A to Part B in the system varies from 17: 1 to 3: 1. Thus, depending on the solids content and the amount and type of the hydrocarbon polymer emulsion in Part A, or the pH of the emulsion system in Part A, the ratio of Part A to Part B in the system may be 17: 1, 16: 1, 15: 1, 14: 1, 13: 1, 12: 1, 11: 1, 10: 1, 9: 1 ,. 8: 1, 7: 1, 6: 1, 5: 1, 4: 1, 3: 1, 15: 2, 13: 2, 11: 2, 9: 2, 7: 2, etc. The optimal relationships can be determined by the skilled person using standard techniques. PART A WATER BASED ASPHALT EMULSION Part A of the present system is an emulsion comprising water, asphalt, and a dispersion system. The asphalt may be a polymer modified asphalt, an oxidized asphalt, or a non-oxidized asphalt. The asphalt emulsion may additionally be comprised of a hydrocarbon polymer emulsion / latex such as a natural rubber, a styrene butadiene similar to synthetic rubber, an acrylic resin, polyvinyl acetate, and similar materials, or any combination thereof . An example of a suitable synthetic polymer emulsion is an emulsion of styrene-butadiene rubber (SBR). The SBR can also be crosslinked, for example, carboxylate groups that result from treatment with methacrylic acid, or the like. Another example of the suitable synthetic polymer emulsion is a polyacrylate emulsion. Polymer emulsions can be made before blending or polymerized in the asphalt during the emulsification process. The dispersion system comprises one or more asphalt emulsifiers. The asphalt emulsifier can be nonionic, anionic, or cationic. Examples of nonionic emulsifiers are mono- and di-glycerides, polysorbates, and glycerol esters. Examples of anionic emulsifiers are soaps, sulphated oils and sulphated alcohols. Cationic emulsifiers are typically some type of amine compound. The asphalt emulsion may additionally comprise other optional ingredients such as defoamers, rheology modifiers, fillers, antifreeze agents, plasticizers, crosslinkers, solvents, etc. PART B Part B of the present multipart system is a liquid polymer composition that lacks water. Such a composition is liquid at room temperature and has a viscosity that allows Part B to be mixed with Part A to provide a coating composition that can be applied to the surface of a substrate by spraying or pouring. Thus, in certain modalities, Part B has a viscosity between 3000 and 60,000 cps. In certain embodiments, Part B comprises an organic solvent. In other modalities, Part B lacks an organic solvent, that is, it is solvent-free. Liquid Polymer Part B of the present system may comprise one or more of the following non-emulsions, liquid polymers: polyurethane polymers, acrylic polymers, styrene butadiene, styrene block polymers, and including but not limited to, blocking polymer of styrene (ethylene-butylene) -styrene (SEBS), styrene- (isoprene) -styrene block polymer (SIS) styrene- (butylene) -styrene block polymer (SBS) styrene-block polymer (ethylene- propylene) -styrene (SEPS), and styrene- (ethylene-propylene) blocking polymer (SEP), silicone polymers, ie organopolysiloxanes, or any combination thereof. The polyurethane polymer is formed by reacting a hydroxy-terminated polymeric material with an aromatic or aliphatic isocyanate to provide a polyurethane polymer. The polyurethane polymer may comprise NCO groups not terminated or terminated at the end or both. In certain embodiments, the polyurethane polymer composition comprises from about 1.2 to 3.5% by weight of NCO groups. Suitable hydroxy-terminated polymeric materials for preparing the present polyurethane polymer include, but are not limited to, di, tri and tetrafunctional polyols, including polyether polyols, polyester polyols, acrylic polyols, and polyols comprising two or more hydroxyl groups and a straight or branched chain hydrocarbon. Suitable diols and polyester triols include polyethylene ether diols or triols, polyethylene ether diols or triols, polypropylene ether diols or triols, polybutylene ether diols or triols, polytetramethylene ether diols or triols, and polypropylene copolymers. block of such diols and triols. Suitable hydroxy-terminated polyesters include any hydroxy-terminated piloses prepared from polybasic or anhydride acids (e.g., adipic acid and italic anhydride). The polylactone containing the hydroxyl groups is also suitable for making the polymer, particularly diol and polycaprolactone triol. Suitable acrylic polyols include hydroxyl-terminated polyacrylate. Acrylates include, but are not limited to, butylacrylate, methylacrylate, methyl methacrylate, ethyl acrylate, 2-ethylhexyl acrylate or the mixture thereof. Suitable polyols comprising two or more hydroxyl groups and a straight or branched hydrocarbon chain include hydroxyl-functionalized polybutadiene. Other suitable polyols include polycarbonates having hydroxyl groups. In certain embodiments, the polyol has a weight average molecular weight of 500 to 18,000. The isocyanates that are reacted with the hydroxy-terminated backbone polymer are organic isocyanates having two or more isocyanate groups or a mixture of such organic isocyanates. The isocyanates are aromatic or aliphatic isocyanates. Examples of suitable aromatic di or triisocyanates include methane p, p ', p "-triphenyl tripolyisocyanate, methane of P ^ P'- diphenyl diisocyanate, naphthalene-1,5-diisocyanate, 2,4-tolylene diisocyanate, 2.6 -tolylene diisocyanate, and mixtures thereof. Examples of preferred aliphatic isocyanates are isophorone diisocyanate, dicyclohexyl methane-4,4'-diisocyanate, and mixtures thereof.

The polyurethane polymer can be prepared by mixing the finished polymer with hydroxy and organic isocyanate together at room temperature and pressure, although the rate of the reaction is significantly increased if the temperature of the reaction mixture rises to a higher temperature. for example, a temperature between 60 ° -100 ° C. A molar excess of the isocyanate is used to ensure that substantially all of the polyurethane prepolymer chains have NCO end groups. A catalyst such as a tin catalyst can be added to the mixture to accelerate polymer formation. In certain embodiments, the% by weight of the NCO groups on the polyurethane polymer ranges from 1.9 to 3.0. Part B may comprise polyurethane polymers that are unfinished or final finished or combinations thereof. The final terminated polyurethane polymers can be final finished with silane finishing agents, final alcohol finishing agents, or epoxies. Examples of suitable silane finishing agents include, but are not limited to, silanes corresponding to formula I. H-NR1-R2-Si (OR3) 2 (R4) I wherein R1 represents, hydrogen, a hydrocarbon radical suitable aliphatic, cycloaliphatic and / or aromatic containing from 1 to 10 carbon atoms, one second -R2-Si (OR3) 2 (R4), or -CHR5-CHR6COOR7 where R5 and R6 are H or organic portion of Ci-6 , and R7 is organic portion of Ci-i0. R2 represents a linear or branched alkylene radical containing from 1 to 8 carbon atoms. R3 represents an alkyl group of Ci_6. R4 = -CH3, -CH2CH3, or OR3. Examples of suitable aminosilanes corresponding to formula I include N-phenylaminopropyltrimethoxysilane, N-ethylaminoisobutyltrimethoxysilane, gamma-aminopropyl-methoxysilane, gamma-aminopropyltriethoxysilane, and the reaction product of an aminosilane (such as gamma-aminopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, gamma-aminopropylmethyldimethoxysilane). ) with acrylic monomer (such as ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, methyl acrylate, methyl methacrylate and glycid acrylate Examples of other suitable silanes include mercaptosilane, the reaction product of a mercaptosilane with a monoepoxide and the reaction product of an epoxysilane with a secondary amine The silicone polymer or organopolysiloxane used in the present composition can be a non-reactive organopolysiloxane, that is, a polysiloxane containing non-reactive functional groups In other embodiments, the organopolysiloxane it is an organ reactive polyol that contains reactive functional groups, preferably two reactive functional groups on the polymer chain, preferably at the terminal portion thereof, ie, preferably the reactive functional groups are end groups. The organopolyses useful in this invention include, but are not limited to, those which contain a condensable functional group which may be a hydroxyl group, or hydroxyl group such as an alkoxy group bonded with silicone, acyloxy group, keto group, amino group, group amido, aminoxy group, an alkenoxy group, and so on. The reactive functional groups can be hydroxyl, alkoxy, alkoxysilicone, asyloxy, ketoxime, amino, amido, aminoxy, alkenoxy, alkenyl or enoxi groups or any combination thereof. The reactive functional groups are end groups, pending groups, or a combination thereof. In certain embodiments, the organopolysiloxanes used in the present invention preferably have a molecular weight in the range of 20,000 to 100,000 grams / mole. In one embodiment, the reactive organopolysiloxane polymer of the formula: wherein R1 and R2, independently, are an alkyl having from 1 to 8 carbon atoms, desirably from 1 to 4 carbon atoms with preferred methyl, or an aromatic group or substituted aromatic group having from 6 to 10 carbon atoms with phenyl which is preferred, and "n" is such that the weight average molecular weight of the organopolysiloxane is from about 10.0 to about 200,000 and desirably from about 20,000 to about 100,000 grams / mole. It will be understood that the above polymers also contain, as mentioned in the foregoing, two or more reactive functional groups (X) therein. The functional groups, independently, may be OH or OR3, or N (R4) 2, enoxi, acyloxy, oxime, or aminoxy, wherein these functional groups may have substituents at any suitable location. For example, CH2 R / II / C (Enoxi) -O-C-R8 (Acyloxy) -0-N = C (Oximo) \ \ R7 R10 Rll RS Q R13 / I II -O-N (Aminoxy) -N = C-R6 (Amido) -N (Amino) R12 R14 wherein R3 to R14 are, independently, an alkyl or cycloalkyl having from about 1 to about 8 carbon atoms. In one embodiment, the reactive organopolysiloxane of the present polymer composition can be represented as R1 (R) 3-m (X) mSi-0 [YES-0] n-YES (X) m- (R) 3-m The one or more R groups, independently, is an alkyl having 1 to 8 carbon atoms or an aromatic or an aromatic alkyl having 6 to 20 carbon atoms and optionally containing one or more functional groups thereof, such such as amine, hydroxyl, alkene, alkoxy and so on. The amount of the functional groups, ie, m, is 1, 2 or 3. The reactive functional group (X) can be OH, OR ' 0 N (R ') rhenoxy, or acyloxy, or maximum, or aminoxy, or amido, wherein the reactive functional group may have substitutions, R', in any suitable C or N, and which is selected from the group consisting of an alkyl that has about 1 to about 8 carbon atoms, an aromatic, an aromatic alkyl having from 6 to 20 carbon atoms, and wherein R 'may optionally contain one or more functional groups thereof, such as amine, hydroxyl, and so forth. An organopolysiloxane fluid may further contain a mixture of two or more different polysiloxanes and / or or organopolysiloxanes having different molecular weights. The polysiloxanes are generally viscous liquids and are commercially available from various silicone manufacturers such as Wacker Corporation, General Electric, Dow Corning and Rhone-Poulenc. In another embodiment, the present polymer composition comprises a non-reactive organopolysiloxane, that is, the organopolysiloxane lacks functional groups. The non-reactive organopolysiloxane can be represented as. R 1 I (R 3) 3 Sii-O- [Si-0] "- Si (R 3) 3 I, R 2 where R 1, R 2, and R 3 independently, are an alkyl having 1 to 8 carbon atoms, desirably 1 to 4 carbon atoms with methyl which is preferred, or is an aromatic group or substituted aromatic group having 6 1 0 carbon atoms with phenyl which is preferred, and "n" is such that the weight average molecular weight of the organopolysiloxane is from about 100 to about 10,000 and desirably from about 3,000 to about 5,000 grams / mol. OPTIONAL INGREDIENTS Optionally, part B of the present system comprises a plasticizer, which can be used to control or reduce the viscosity of Part B. Examples of plasticizers suitable for use in Part B include, but are not limited to, phthalates, esters of benzoate and mineral oil. Part B may also comprise fillers such as calcium oxide, calcium carbonate, fumed silica, clay, talc. Such fillers may be added to control the viscosity, rheology, or reduce the cost of Part B. Optionally, Part B comprises one or more of, a moisture scavenger and a UV stabilizer. SOLVENT In certain embodiments, Part B of the present invention does not include a solvent, ie, the polymer composition is solvent-free. In other embodiments, Part B comprises a solvent, which can be used to solubilize the polyurethane polymers. Examples of solvents suitable for use in the present system include, but are not limited to, mineral oils, xylene and toluene. Preparation of Polyurethane Asphalt Coating. Depending on the type of coating that is desired, various ratios of Part A may be combined with Part B, to provide the water-based asphalt-containing coating composition of the present invention. In 'certain modalities, the ratio of Part A to Part B varies from 17: 1 to 3: 1 parts by weight. The selected relationship depends, at least in part, on the solids content of the asphalt emulsion, the absence and presence of additional ingredients such as natural rubber, styrene butadiene, acrylic or PVA emulsions or combinations thereof in the asphalt emulsion. Part A is combined with Part B at room temperature and the resulting emulsion or mixture is applied to one or more horizontal or vertical surfaces of an underlying substrate. Therefore, the resulting emulsion mixture is allowed to cure or dry under ambient conditions. When such conditions include temperatures of 10 ° C (50 ° F) or less, it may be desirable to add a catalyst to the resulting emulsion or mixture before application. Examples of suitable curing catalysts include dibutyltin diacetate, dibutyltin dilaurate and dibutyltin bis (acetylacetonate). The catalyst can also be added to Part A, that is, the asphalt emulsion. The present method does not require heating of any part of the present multipart system, and therefore overcomes some of the disadvantages of the previous method that have been used to make polyurethane asphalt coatings. Coating Properties. The coatings that are produced according to the present method have increased the resistance to washout as compared to the coatings resulting from the application of Part A alone to an underlying substrate. In addition, the coatings that are produced according to the present method cure more quickly than the coatings resulting from the application of Part A alone to an underlying substrate. Thus, in certain embodiments, the present method can be used to make a single layer coating that is thicker than a single layer coating resulting from the application of Part A alone to an underlying substrate. EXAMPLES The following examples are for purposes of illustration only and are not intended to limit the scope of the claims appended thereto. All references cited herein are specifically incorporated herein in their entirety. Materials Part A: Asphalt emulsion The asphalt emulsion (~ 50% solids) or a modified polymer asphalt emulsion such as an SBR asphalt emulsion (~ 60% solids), natural rubber emulsions, or emulsions of acrylic asphalt are commercially available and can be used in the system as described below.

Part B: Liquid Polymer Part B, ie, the liquid polymer system may comprise different polyurethanes, acrylics, Kraton, styrene butadiene, silicone polymers or any combination thereof. In Examples 1-4 below, the polyurethane polymer composition was made by reacting the polyol MDI in the presence of a tin catalyst to achieve a% NCO of 2.6 and a viscosity of 14,000 cps at 25 ° C with a spindle 52 to 20 rpm using a cone and plate viscometer. EXAMPLE 1 In this example, a part of Part B, a polyurethane polymer, was mixed with 10 parts of Part A, an emulsion of rubber asphalt, and a coating of 125 mm of the mixture was applied to a substrate. The quantities are listed in Table la and Ib immediately. Table la-Part A The mixture of Parts A and B were compared in Part A in the following two ways, resistance to washout and 24 hours of cure depth. The results are listed in the Table below. Table EXAMPLE 2 In this example, 1 part of Part B, a polyurethane polymer, was mixed with 6 parts of Part A, a rubber emulsion, and a 125 mm coating of the mixture was applied to a substrate. The quantities are listed in Table 2a and 2b below. Table 2a-Part A The mixture of Parts A and B were compared in the Part A in the following two ways, resistance to washout and 24 hours of cure depth. The results are listed in Table 2c below. Table 2c EXAMPLE 3 In this example, a part of Part B, a polyurethane polymers, was mixed with 7 parts of Part A, a rubber asphalt emulsion, and a 125 mm coating of the mixture was applied to a substrate . The quantities are listed in Table 3a and 3b below. Table 3a-Part A The mixture of Parts A and B were compared in the to Part A of the following two manner, resistance to washout and 24 hours of cure depth. The results are listed in Table 3c below. Table 3c EXAMPLE 4 In this example, a part of Part B, a polyurethane polymer, was mixed with 7 parts of Part A, a rubber asphalt emulsion, and a 125 mm coating of the mixture was applied to a substrate. The quantities are listed in Table 4a and 4b below. Table 4a-Part A Table 4b-Part B The mixture of Parts A and B was compared to the Part A in the following two way, resistance to washout and 24 hours of curing depth. The results are listed in Table 4c below. Table 4c EXAMPLE 5 In this example, a part of Part B, a silicone polymer, was mixed with 6 parts of Part A, a rubber asphalt emulsion and a 125 mm coating of the mixture was applied to a substrate. The quantities are listed in Table 5a and 5b below. ' Table 5a-Part A The mixture of Parts A and B was compared in the Part A of the following two ways, resistance to washout and 24 hours of cure depth. The results are listed in Table 5c below. Table 5c EXAMPLE 6 In this example, a part of Part B, an acrylic polymer, was mixed with 6 parts of Part A, a rubber asphalt emulsion, and a 125 mm coating of the mixture was applied to a substrate. The quantities are listed in Table 6a and 6b below. Table 6a-Part A Latex Composition by 100 Asphalt Latex (64% solids) Styrene Rubber Latex 9.1 Butadiene (68% solids) Natural Rubber Latex 14.4 (61.5% solids) TOTAL 100.00 Table 6b and Part B Latex Parts Composition for 100 Parts The mixture of Parts A and B was compared to the Part A of the following two way, resistance to washout and 24 hours of curing depth. The results are listed in Table 6c below. Table 6c EXAMPLE 7 In this example, a part of Part B, a copolymer blocked with SEBS, was mixed with 6 parts of Part A, a rubber asphalt emulsion, and a 125 mm coating of the mixture was applied to a substrate . The quantities are listed in Table 7a and 7b below. Table 7a-Part A The mixture of Parts A and B was compared to the Part A of the following two way, resistance to washout and 24 hours of curing depth. The results are listed in Table 3c below. Table 7c

Claims (22)

1. CLAIMS 1. A multi-part system for preparing a coating composition in situ, the system characterized in that it comprises; a) an emulsion comprising asphalt, water, and a dispersion system; and b) a liquid polymer composition lacking water; wherein the asphalt emulsion and the liquid polymer composition are present in the multipart system in a ratio of 3: 1 or greater.
2. 2. The multi-part system according to claim 1, characterized in that the asphalt emulsion and the liquid polymer composition are present in the system in a ratio of 17: 1 to 3: 1.
3. 3. The multi-part system according to claim 1, characterized in that the asphalt emulsion further comprises one or more of the following emulsions: natural rubber, styrene-butadiene rubber, an acrylic resin and a vinyl acetate or any combination thereof same.
4. 4. The multi-part system according to claim 1, characterized in that the solids content of the asphalt emulsion is from 35 to 65% by weight.
5. 5. The multi-part system according to claim 1, characterized in that the liquid polymer is chosen from one or more of the following: a polyurethane, an acrylic polymer, styrene butadiene, a block polymer containing styrene, a polymer of silicone or any of the combinations thereof.
6. 6. The multipart system according to claim 1, characterized in that the liquid polymer lacks a solvent.
7. 7. The multipart system according to claim 1, characterized in that the liquid polymer composition comprises a solvent.
8. 8. The multipart system according to claim 1, characterized in that the liquid polymer composition comprises calcium oxide, calcium carbonate, a plasticizer or any combination thereof.
9. 9. The multipart system according to claim 1, characterized in that the liquid polymer composition comprises a polyurethane.
10. The multipart system according to claim 1, characterized in that the liquid polymer composition comprises an acrylic polymer.
11. The multipart system according to claim 1, characterized in that the liquid polymer composition comprises a silicone polymer.
12. 12. The multipart system according to claim 1, characterized in that the liquid polymer composition comprises a styrene block polymer.
13. The multipart system according to claim 1, characterized in that the liquid polymer composition comprises styrene butadiene.
14. 14. The multipart system according to claim 1, characterized in that it further comprises a catalyst, wherein the catalyst is a separate part of the system or is included in the asphalt emulsion.
15. A method for coating a substrate, characterized in that it comprises: a) preparing a coating composition in situ, wherein the coating composition is prepared by combining an emulsion comprising asphalt, water and a dispersion system with a polymer composition liquid, wherein the liquid polymer composition lacks water and comprises a polyurethane, an acrylic polymer, styrene-butadiene, a silicone polymer, a block polymer containing styrene, or any combination of polymers, and, wherein the Asphalt emulsion and liquid polymer composition are combined in a ratio of 3: 1 or greater; and b) applying the coating composition to the substrate.
16. 16. The method of compliance with the claim 15, characterized in that the method is carried out without heating the coating composition.
17. The method according to claim 15, characterized in that one or more layers of the coating composition are applied to the substrate, and wherein at least one or more of the layers is 250 millimeters or more in thickness.
18. 18. The method according to claim 15, characterized in that the curing catalyst is incorporated in the coating composition before the application of the coating composition to the substrate.
19. 19. The method according to claim 15, characterized in that the curing catalyst is a tin catalyst.
20. The method according to claim 15, characterized in that the ratio of the asphalt emulsion to the liquid polymer composition varies from 17: 1 to3: 1
21. 21. Method for increasing the rate of complete curing of a coating comprising an asphalt emulsion, characterized in that it comprises: a) providing an asphalt emulsion comprising asphalt, water, and a dispersion system, b) combining the asphalt emulsion from step a with a liquid polymer composition lacking water to provide a coating composition, wherein the ratio of emulsion of asphalt to liquid polymer composition is 3: 1 or greater, c) applied to the coating composition of step ba a substrate; wherein the complete curing ratio of a coating formed from the coating composition of step b is faster than the ratio of complete curing of a coating formed from the asphalt emulsion alone.
22. 22. A method for preparing a single layer, weather-resistant coating, having a thickness of 250 millimeters or greater, characterized in that it comprises a) combining in situ an asphalt emulsion comprising water, asphalt, and a dispersion system with a liquid polymer composition, without emulsion to provide a coating composition, wherein the liquid polymer composition without emulsion lacks water and comprises a polyurethane, an acrylic polymer, styrene butadiene, a silicone polymer, a styrene block polymer , or any combination of the polymers, and wherein the ratio of the asphalt emulsion to the non-emulsion polyurethane polymer composition is from 17: 1 to 3: 1; and b) applying at least one layer of the coating composition to a substrate, wherein at least one layer has a thickness of 250 millimeters or greater.