Scrub resistance

The better intumescent agents are water-soluble and therefore produce paints having poor water and scrub resistance. The Vic tamide is a relatively new product and has not been completely evaluated as yet. It is less water-sensitive than most of the other compounds. 

The Engineer Research and Development Laboratory (2) has done extensive work on the use of silicones in paint formulations. The insulative qualities of intumescent water-soluble inorganics are maintained with water resistivity (scrub resistance) improved by the use of water-repellent type silicones. 

Stilbert and Cummings (10) describe very ably the status of fire-retardant coatings known to industry at the present time. Dow Latex 744B plasticized with Santicizer B-16 was added to a typical intumescent formulation to produce a decided improvement in the scrub resistance of the coatings, if less than 15% latex was used. 

Polyvinyl acetate Scrub-resistant Poor Poor Poor Poor Fair Very good Easy... 

An early investigation by Tess and Schmitz (29) on styrene-butadiene paints demonstrated that use of hexylene glycol improved tensile strength, elongation, leveling, and scrub resistance of latex paints. Electron micrographs of the films, obtained by a replica technique, showed that use of the coalescent resulted in... 

The reduction of scrub resistance is the main disadvantage of HEUR/ hydrophobically modified alkali-swellable latex thickener systems 18, 19). Hydrophobically modified alkali-swellable latex-thickened paints often show increased water and alkali sensitivity, reduced wet and dry adhesion, and lower scrub resistance than similar cellulosic-thickened paints. 

Best scrub resistance results could be achieved with the variation of different parameters an increase of pH level (up to 9), dispersant level (from 0.6 to 1 %) or the introduction of organic opacifier could have a very positive effect on scrub level keeping the same overall properties... 

Features Very high dry pick str. produces higher sheet and ink gloss than conventional VA-based latexes develops high degree of smoothness and compressibility high scrub resist, in wallpaper grouts Properties 0.17 nm particle size dens. 8.8 Ib/gal vise. 550 cps pH 5.5 si. anionic 55% soiids Airflex 456 [Air Prods./Poiymers]... 

Features Exc. scrub resist, at high PVC s durabiiity and aikaii resist, for exterior paints fiexibiiity for mastics good coior acceptance Properties Emuision 0.17 nm avg. particie size dens. 9.1 ib/gai vise. 100-500 cps 52% soiids Airflex 809 [Air Prods./Perf. Chems.]... 

Uses Vehicie for interior paints, soiv.-free, iow odor paints Features Provides iow temp, coaiescence and very good scrub resist. Properties Low odor 0.15-0.30 p particie size dens. 8.94 ib/gai vise. 200-700 cps pH 4.5-6.0 55% totai soiids Airflex 810 [Air Prods./Perf. Chems.]... 

Features Exc. low temp, film formation exc. scrub resist. good blocking resist., freeze/thaw stability exc. aging chars., water resist., flexibility Properties Milky wh. emulsion 0.5 p avg. particle size si. odor dens. 9.0 Ib/gal vise. 200-600 cps pH 4.8-5.5 nonionic 55% solids Airflex 4500 [Air Prods./Poiymers]... 

Features Very high efficiency offers flexibility, gloss retention, lower surfactant requirements, vise, stability, scrub resist. compat. with reactive pigments... 

Uses Associative thickener for solv.-free furniture/parquet coatings, stains Features Exc. flow and leveling, scrub resist. efficiency in ICI vise, development reduces or eliminates syneresis clear nonsettling, nonseparating sol n. 

Chem. Descrip. Solution of a polyurethane in water/diluent Uses Rheology control agent, associative thickener, flow aid, scrub resist. aid, film-former, pigment wetting agent for aq. polymer emulsions, coatings, syn. plasters, emulsion paints, adhesives, fillers, anticorrosive paints... 

Features Solv.-free inc. hiding power, wash and scrub resist. splash reduction during roller applic. no neg. effects in gloss high UV stability Properties Clear to si. yish. cloudy liq. dens. 1.02-1.04 g/cm (20 C) ... 

Features Otters flexibility, toughness, durability, and scrub resist. Properties Emulsion 0.3 nm avg. particle size dens. 9.1 Ib/gal vise. 700-1200 cps 55% solids Fiexbond 381 [Air ProdsyPolymers]... 

Uses Acrylic tor interior semigloss and exterior house paints Features Provides improved response to associative thickeners to provide higher gloss high scrub resist. 

Features Highly efficient offers flexibility, gloss retention, vise, stability, exc. scrub resist., lower surlaclant requirements Regulatory FDA 21CFR 176.170,176.180,176.200 Properties Colorless to It. amber si. hazy to dear readily sol. in water and glycols sp.gr. 1.27-1.30 pH 7.5-9.0 (5%) anionic 42-44% act. Use Level 0.2-1.0% dispersant solids/pigritent solids (paints) 0.15-0.75% (ceramics)... 

Uses Rheology control agent, associative thickener, flow control agent, leveling agent for low PVC gloss coatings Features Solv.-free exc, scrub resist. 

Uses Scrub resist, aid, abrasion resist, aid for aq. coatings and inks... 

CAS 1327-36-2 EINECS/ELINCS 215-475-1 Uses Reinforcing agent, extender for EPDM, SBR, nitrile, and most other polymers filler in solvent and water-based paints Features Inert offers exc. hiding, max. sheen control, and good scrub resistance... 

Uses Monomer for emulsion polymerization of acrylic and vinyl-acrylic, latex paints, adhesives, caulks, sealants wet adhesion promoter scrub resist, aid in paint films... 

Chem. Descrip. 50% Methacrylamidoethylethyleneurea, 20% methacrylic acid, 30% water, 2000 ppm hydroquinone inhibitor Uses Monomer for emulsion polymerization of acrylic, vinyl-acrylic, and styrene-acrylic latex paints with improved wet adhesion, wet scrub resist., solv. resist. adhesion promoter in water- and solv.-based coatings and adhesives... 

A good coalescing agent can provide a significant improvement in scrub resistance, stain resistance, flexibility and weatherability. 

Scrub resistance is the ability of the paint to withstand repeated cleaning with detergent. Test methods such as ASTM D2486 require the use of mechanical scrub machines, brushes, or pads. Resistance can be quoted as weight loss for a given number of cycles or the number of cycles to erode a given film thickness. 

Critical pigment volume concentration (CPVC) n. That level of pigmentation, PVC, value in the dry paint, where just sufficient binder is present to fill the voids between the pigment particles. At this level, a sharp break occurs in film properties such as scrub resistance, hiding, corrosion resistance, ease of stain removal, etc. Different requirements for each product would dictate different PVC or CPVC... 

Scrub resistance n. The ability of a coating to resist being worn away or to maintain its original appearance when rubbed with a brush, sponge, or cloth, and an abrasive soap. For test method, refer to ASTM D 2486. 

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