Floor mastics

Fig. 1. (Top) Typical V-notch spreader used with tile-board adhesives. (Bottom) Typical notched trowel used to apply floor mastic.

Flooring mastics based on nonorboxylated SBR HSL are employed primarily in carpet and mineral fiber or felt-backed vinyl glue-down apphcations over most common sub-floor surfaces. Such SBR based adhesives are not recommended for unbacked vinyl (PVC) applications due to plasticizer migration from PVC to the adhesive and bond loss issues. Conventional felt backings provide an effective barrier to plasticizer migration. In contrast, acrylic copolymer based floorplasticizer resistance is required. 

The key parameters to control are formulation water content, clay/latex ratio and resin/latex ratio, depending on the desired adhesive cost structure. Not surprisingly, too much filler or too little resin and/or oil will result in inferior properties. Excess water will result in slower drying, and probably the need for more water sensitive thickeners. Like many other SBR based adhesives, HSL based flooring mastics include in-can and dry-film preservatives as well as an antioxidant package to ensure long-term performance. 

Like sub-floor mastics, wall mastics are also manufactured in solvent based, polyurethane and water based formulations. Due to reduced strength requirements (i.e. relatively low inherent strength of drywall), drywall mastics are typically filled to a higher degree and thus, are less costly compared to AFG-01 sub-floor mastics. 

A product may also be defective because it was sold with iaadequate wamiags. Burch vs Amsterdam Corporatioa (11) is an early example of a failure-to-wam case. A plaintiff was badly burned ia an explosion and flash fire that occurred while he was applyiag a floor tile adhesive sold by the defendant. The label on the can of mastic adhesive warned that the product was extremely flammable and should not be used near a fire or flame. 

Duct mastic has replaced duct tape as the most effective sealing material. Mastic is a fibrous, elastomeric compound that permanently seals duct connections and seams. In addition, the boot connections between ducts and floors and between walls and ceilings should be fully caulked and/or foamed airtight. Lastly, air handlers that house the... 

Two possible forms of membrane are hot applied mastic asphalt or bitumen/butyl rubber sheeting with welded or glued joints. The membrane under the floor slabs has to be lapped with that around the walls. It is essential that the membrane is protected during construction, and a typical arrangement is as shown in Figure 6.15. 

Hot applied mastic asphalt floors have been used for many years in industrial environments, where a good degree of chemical resistance under normally wet conditions is required. Properly laid mastic floors are totally impervious to a wide range of chemicals but not solvents. In terms of mechanical performance, mastic asphalt floors are similar to the bitumen-modified cementitious floors, but they are generally laid at a minimum of 25 mm thickness and tend to shove and corrugate in service under heavy loads. Mastic floors are not very commonly used now, except where the floor is essentially tanked, such as car park decks over shopping precincts. 

At the conclusion of the paving work at Corpus Christi, two electrolytic cells were cast of sulfur concrete for use in the zinc refinery. Subsequent to the work at Corpus Christi, a sulfur concrete floor was applied in the nickel plant at the Asarco Amarillo copper refinery. An isolating barrier of bitu-mastic material was mopped on the concrete before the sulfur concrete pour. This floor, a substantially smaller area, was overlaid on a damaged existing floor. Similar techniques to those described were used in mixing and placement. 

Floor tile and mastic (solvent method) removal 14 0.005-0.010 0.005 0.005 Area ... 

Lange JH, Thomulka KW. 2000a. Air sampling during asbestos abatement of floor tile and mastic. Bull Environ Contam 64 497-501. 

Lange JH, Thomulka KW. 2000b. An evaluation of personal airborne asbestos exposure measurements during abatement of dry wall and floor tile/mastic. Int J Environ Health Res 10 5-19. 

A red shale brick or quarry tile floor is usually installed over a hot or cold applied mastic membrane. The mastic is applied to the concrete floor then the brick or tile are set with a resin cement. The resin cement can be a furan, a polyester or an epoxy depending on the anticipated exposure conditions. If high temperatures and constant exposure to aggressive chemicals are anticipated, the brick or tile will be bedded in the mortar as well as having mortar joints. 

MAJOR PRODUCT APPLICATIONS filtration, ceramics, foams, floor tiles, shoe soles, paints, food, building products, welding electrodes, gaskets, stucco, EIFS, asbestos alternative, sealants, roof coatings, athletic surface coatings, crack fillers and sealers, brake pads, clutches, pavement, artificial leather, electrical components, automotive components, household appliances, mastics, putties, patching compounds, grouts... 

Coal tar paving materials, not made in petroleum refineries Composition blocks for paving Concrete, bituminous Mastic floor composition, hot and cold... 

Chem. Descrip. 1,6-Hexamethylene diisocyanate biuret CAS 822-06-0 EINECS/ELINCS 212-485-8 Uses For light-stable, w/eather-resist. industrial coatings for paints (metal finishing for automotive, aircraft, machines), coatings (wood, plastics, textiles, leathers, and flooring), corrosion resist, coatings, elastomeric casting compds. and mastics... 

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