ATLAS CHEMICALS DIVISION ATLAS POWDER C O M P A N Y , W I L M I N G T O N 9 9 , DELAWARE Atlas Powder Company, Canada, Ltd., Brantford, Ontario, Canada
Two emulsifiers usually work better than one Whenever you're making an emulsion for sale—a dispersion of oils or waxes and water which must remain stable through your customers* usage . . . y o u can usually get best results (and easier emulsiflcation) b y using a blend of oilsoluble and water-soluble emulsifiers. Here are a few hints that will s a v e y o u t i m e in choosing and using emulsifiers in blends. For O / W e m u l s i o n s , the blend y o u use should be predominantly water-soluble. Ordinarily, you'd think of using one of t h e "high H L B " emulsifiers by itself— like o n e of t h e T W E E N ® or M Y R J ® emul-
sifiers made by Atlas. By adding a small a m o u n t of an oil-soluble emulsifier, with low H L B value, y o u usually find that t h e finished emulsion is more stable and often can be made thicker in consistency. For W / O emulsions, the story goes just t h e opposite w a y . A n oil-soluble emulsifier with low H L B value, like o n e of t h e A t l a s S P A N ® or A R L A C E L ® products,
could d o the job b y itself. B u t b y adding
a relatively small amount of t h e opposite kind of emulsifier, such as a T W E E X product, y o u can get water dispersed in t h e oil phase much easier . . . often witho u t a n y milling or homogenization. T o make t h e blending job easier for y o u , Atlas produces emulsifiers of the oilsoluble and water-soluble varieties in matched chemical groups. T h e S P A N and ARLACEL series of sorbitan esters of fatty acids, for example, have their counterparts and co-emulsifiers in t h e T W E E N series of polyoxyethylene sorbitan derivatives of f a t t y acids. T h e S P A N and A R L A C E L products blend nicely with the M Y R J polyoxyethylene stéarates, too. Beside speeding your formulation, y o u can also p u t a sizeable dent in your in\rentory needs by using Atlas emulsifier blends. A f e w "standard" Atlas types, chosen for t h e kind of work y o u do, can often take t h e place of a warehouseful of "specialty" emulsifiers. We'll be glad t o send y o u full technical data, samples for test, a n d recommendations on your specific formulas.
IVO W . . . p a / n f s from
polyesters?
Ttnere's a g o o d possibility t h a t paint manufacturers m a y soon be incorporati n g polgfester resins into their products— for- better resistance t o i m p a c t or t o ch^mic^ls, for better adhesion to metals, or for other advantages. T h i s is t i i e type of resiot used s o successfully a s t t i e basis f o r glass-reinLforced plastics. A.s a result o f paint industry interest i n ouur ACTLAC® 3 8 2 polyester resini, Atlas researeli lias tried this resin ira wood finishes^ chemical resistant finisties a n d wrinkle· finishes. W e now h a v e a. report out the apparent compatibility o f Atlac 3 ^ 2 w i t h v a r i o u s common patint i n gredieotts. Atlac ^382 i s an unsaturated, di-basic acrid ester of a n aikylene oxide condens a t e of a bis-phenol. If y o u ' d l i k e to t r y it in experimental paint formulas, we'll be> glaei to s e n d y o u our r e p o r t and a sample- for t e s t i n g .
Atlas emulsifiers used with revolutionary new paper size Among recent outstanding chemical d e velopments for the p a p e r industry is Hercules Powder Company's " A q u a p e l * / ' an entirely new kind of sizing agent. W h i l e ordinary size usually controls liquid penetration into p a p e r b y forming a coating on the fibers, "Aquapel" actually reacts with the cellulose to b e come an Integral part of the paper. It forms a surface that is resistant to penetration of many acids and alkalies, as well as hot or cold water. A t l a s emulsifier specialists, closely with Hercules, came
working up with
emulsifiers especially w e l l suited f o r d i s persing Μ Αςυα§>«Ι" (an alkylketerxe dimes-) in water f o r application to pape>r. Some* types of "Aquapel" a r e sefcfemulsïfyinçj, being made to include a specîol Atlas emulsifier. Other grades o f "AquKipel*** are ηοη-self-emulsîfying, a n d Heresies usually recommends A t l a s G-10*S6(ai sorbitol derivative) for use in conjunction with these grades. W h e * i yoi**re working with emulsions, it pays t o work with Atlas. As a starter, a s k us fo*r our ^"Organic Chemicals Catalog*," which* includes o v ^ r 9 0 Atlas surfactants.
*AquapeI®—Reg. U.S. Pat. Off., Hercules Powder Co.
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