BENZOIC ACID, TECHNICAL... new way to make better alkyd resins—at lower cost
SANTICIZER® 160 . . . "flexibilizes" acrylic coatings and safeguards gloss
SANTOBRITE®. . . the pem and-a-half per gallon insurai against mold and fungi
Benzoic acid now has new potential as a modifier of alkyd resins, since the price has been reduced to only 19V2Î a pound. W i t h pentaerythritol and other higher polyalcohols it produces coatings with better gloss and durability t h a n similar films made with u p t o 4 0 % excess glycerin. T r y holding excess alcohol to 5 % in alkyd formulations by replacing u p t o 10% of the phthalic anhydride with benzoic acid. Benzoic acid can partially replace higher-cost pelargonic and lauric (from coconut oil) acids in 40% and less oil length alkyds—with noticeable improvement in t h e gloss and durability of the enamel. At its new low price, 66 pounds of benzoic acid can replace 100 pounds of paratertiary-butyl benzoic acid to give equal film performance.
Acrylic resins p u t high-gloss "sales appeal" in coatings—though sometimes t h e gloss fades and t h e flexibility just isn't good enough. T h e resins stubbornly refuse to respond to most plasticizers. B u t there's one plasticizer acrylics really " g o " for: Santicizer 160. I t ' s highly compatible u p to a t least 3 5 % with acrylic resins—and a coating with 28 P H R actually retains a better gloss after 12 months of Florida exposure t h a n an unplasticized formulation! Acrylic coatings formulated with Santicizer 160 have outstanding resistance to water spotting, too, plus improved flow and leveling. Their sheen and durability have been proved over t h e years. W a n t to make a flexible, h i g h - q u a l i t y , f a s t - d r y i n g acrylic finish? Monsanto can guide you in formulating with Santicizer 160—the most compatible plasticizer for acrylic resins.
Shelf life and storage in w a r m vironments make protection aga: microorganism a t t a c k imperativ a manufacturer wants to insure quality of his brand. Organic ] terials in paint pigments—whe formulated for water-base or solve base—are variously susceptible mold and fungi. T h e result can "spoilage" in t h e form of b a d co unsightly growth, and foul odoi: opening t h e container.
For trade-sales paints consider benzoic acid for water-soluble alkyds; emulsion alkyds; and alkyds for blending with polyvinyl acetate, styrene-butadiene, and acrylics. No profit-conscious alkyd resin manufacturer can ignore the potential savings and improved coatings made possible by benzoic acid.
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CHEMICAL PATHS TO NEW COATINGS
P e n t a (oil-soluble pentachlorop n o l ) a n d S a n t o b r i t e (its wal soluble s o d i u m salt) kill t h quality - destroying microorganij in low concentrations. Cost? As I as lYz cents per gallon!Water-soli Santobrite is ideal for preserv water-base casein, rubber latex, other resin emulsion paints. I t be used in oil-base products, simply by grinding with t h e pigrm Or P e n t a can be used—dissol directly in one of the oils or solve P e n t a can also be easily convei to t h e potassium salt for additio latex paints where t h e sodium might cause "bloom." I n higher centrations t h a n the tiny amoi n e e d e d for shelf-life p r o t e c t P e n t a and Santobrite m a k e D permanently mildew-resistant, t h e m and see.
chemicals Paint chemistry breaks the "pro s q u e e z e " ! N e w w a y s h a v e b e e n fou* t o [make n e w film f o r m e r s — differei tougher, more economical t h a n an t h i n g before. T h e y have t o b e . 1 day's needs demand paints, lacque and special coatings w i t h superi chemical and weather resistan* stronger adhesion to a wider varie
WITHOUT
iROCLOR®... improves chlorinted rubber and epoxy coatings, uts cost n swimming-pool paints, industrial oatings, and marine and trafficlarking paints—the Aroclor liquids nd resins (12 to select from) impart variety of performance improvements. I n chlorinated-rubber paints, he presence of an Aroclor resin inreases resistance to water, acid, lkali—improves adhesion and film fcrength—imparts greater weather esistance. Makes the coatings flameetardant, too! roclor plasticizers are compatible ith epoxy resins. T h e liquid Aroclor impounds give epoxies a high deree of flexibility—the resinous comounds act as reinforcing resin exsnders. T h e addition of an Aroclor reatly retards t h e burning rate of poxy compositions, and, when forlulated with a small a m o u n t of n t i m o n y o x i d e , p r o d u c e s nonurning formulations! r
In addition, t h e pigment-binding power, weather resistance, and abrasion resistance are greatly improved. T h e coatings dry fast and—since t h e film is internally plasticized—problems of migration are virtually eliminated. T h e D B M and D B F esters are t h e most efficient comonomers on a price/performance basis. D a t a show savings of 1^/lb. on resin solids when compared t o o t h e r monomers for this use. D B M and D B F also copolymerize with vinyl chloride, acrylics, styrenebutadiene, and other resins and monomers. Blends of these modified systems with alkyds can be expected to produce low-cost, high-performance, alkyd-extended resin systems.
/Lonsanto offers a w h o l e t a s k force of ympounds t h a t can help y o u m a k e sura.ce c o a t i n g s p e r f o r m better,processeas?r, c o s t less t o m a n u f a c t u r e . C h e c k t h e ix p r o f i t - s t r e t c h e r s a b o v e . U s e t h e m ? " b u i l d " n e w p r o d u c t s of y o u r o w n . details,
use this handy
Modaflow is one of those special materials t h a t work wonders even with small "doses." I t ' s so new in the coatings field t h a t its span of uses is just beginning to define itself. Basically, Modaflow acts on the surface tension of organic liquids. Added in the range of only 0.10 to 2.0%, Modaflow p r o m o t e s leveling a n d spreading. I t completely eliminates bubbles and foam entrapment in many acid and neutral organic coatings systems.
D B M and D B F , highly reactive m o n o m e r s , r e a d i l y copolymerize with vinyl acetate—give desired flexibility t h a t is permanent. The internally-plasticized polyvinyl acetate coating is not subject to extraction or volatilization; and such coatings show a marked improvement in general properties over t h e best postplasticized formulation. A polyvinyl acetate latex paint formulated with 20% D B M or D B F has sufficient flexibility for good low-temperature performance.
f substrates; increased flexibility; yen better resistance to mildew and iological a t t a c k .
For more
MODAFLOW®. . . new additive improves leveling, flow-on, eliminates "pinholing"
DIBUTYL MALEATE, DIBUTYL FUMARATE...permanently preplasticize polyvinyl acetate coatings
L major value of Aroclor compounds ; their complete inertness. Alkyds, olyesters, rosin esters—in contact ith cement—all saponify, t h u s jsing some chemical resistance; blorinated paraffin under weatherag conditions loses chlorine and beomes subject to attack. B u t the iroclor compounds for all practical urposes are immune to chemical hange. Aroclor additions t o coatgs invariably improve their perDrmance — and frequently reduce heir cost per gallon, as well.
coupon
Modaflow has such a unique action t h a t it should improve the film uniformity and the application characteristics of any flow-on, dip, or rollercoat formulation—whether the base resin is alkyd, melamine, phenolic, polyester, or epoxy. Modaflow appears to be water and p H sensitive. However, it will tolerate u p to 2 % water in the system, and the concentration needed will vary with the resin and with degree of acidity. I n evaluating Modaflow in any specific coating formulation, a wide range of concentration must be tried "stepwise," since t h e modification usually takes place in a certain critical concentration range, which in some coatings is quite low; in others, much higher. I n any case, just a little Modaflow does a lot.
M O N S A N T O CHEMICAL COMPANY Organic Chemicals Division Task Force Chemicals, Department 4 4 6 9 - X St. Louis 6 6 , Missouri
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WITH
Benzoic A c i d • Aroclor Santicizer 1 6 0 • D B M a n d DBF Santobrite • Modaflow
