N e w airborne silica Functionally u n i q u e because it p e r f o r m s m o r e efficientSy using v e r y small quantities W h a t silica d o you know, other than this new airborne CAB-O-SIL®, that will perform like this: REINFORCING AGENT . . . where rubber compounds containing 22 parts Cab-o-sil per 10O parts of natural rubber have been formulated to yield tensile strengths of more than 4,000 pounds per square inch. High reinforcement is also obtained with G R - S , 3 u t y l and Neoprene rubber polymers. SUSPENDING AGENT . . . where "can stability" of paints has been improved with 0.1-2.0% Cab-o-sil, which retards the settling of high density prime pigments. Flow properties of such systems are also simultaneously controlled. FLATTING AGENT . . . where flat varnishes formulated with 18% Cab-o-sil (based on total solids) have given 60° gloss meter readings of 35 on black carrara glass. After six months of storage, pigment settling is insignificant — 95 % of the vehicle has been observed t o contain suspended pigment.
THICKENING a n d GELLING A G E N T
. . . where small percentages of Cab-o-sil b y weight are required to produce soft gels (corresponding liquids listed in order o f decreasing polarity): 1 2 ^ in water; 1 1 % in ethylene glycol; 9 % in butyl alcohol; 8% in turpentine; 7% in benzene. THIXOTROPIC AGENT . . . where the addition of 1 % Cab-o-sil to a nontiiixotropic polyester resin has increased the viscosity from 410 centipoises (Brookfield viscosity) to 8,000 centipoises a t 2 r.p.m. and 3,5O0 centipoises at 20 r.p.m. ANTBCAKINC AGENT . . . where 10% Cab-o-silfciasbeen used to prevent D D T from caking and 0.4% has produced a free-flowing sulphur. ANTISLIP AGENT . . . here, antislip properties can be imparted to solvent base floor waxes b y the addition of very small quantities of Cab-o-sil. A film of higher gloss also results.
Free CABOT
MINERALS & CHEMICALS DIVISION CW, 77 FRANKLIN ST., BOSTON 10, MASS.
Name_ T£tle__ Comparty_ Address
R e a d about these and O T H E R E X A M P L E S of how Cab-o-sil can minimize the cost of various product and process improvements in the new technical bulletins now being offered with a free sample. This new colloidal silica is prepared in a hot gaseous environment where ' 'airborne' * particles are formed almost instantly. This different process gives CAB-O-SIL remarkable properties that work together to cause unusual behavior. Chemical
and
JPhjrsicaî
Properties
Silica Content (Moisture-Free Basis) 99.0 - 99.7% Free Moisture (105° C.) 0.2 — 2.0% IenitionLose(l000°C.) 0.2 — 1.0% CaO, MgO 0.00% Fe2 Os 0.004% Particle Size Range 0.015 —0.020 micron Surface Area (Nitrogen Adsorption) 175—200 m . Vern. Specific Gravity 2.1 Color White Refractive Index 1.55 pH ( 4 % Aqueous Dispersion) 3.5—4.2
CAB-O-SIL® SAMPLE A N D BULLETINS
GODFREY L. CABOT, INC. Since 1 882, manufacturers o f chemicalsCabot products include Carbon Blacks; Pine Tar Products; Charcoal; Cab-o-sil; Wolfrastonite; Garnet; Petroleum; Natural G a s ; Natural Gasoline; Gun Tubes; O i l Well Pumping Equipment.
THERMAL INSULATION . - . where Cab-o-sil has an apparent "K" of 22 microwatts/cm/k° at a mean temperature of — 1 0 0 ° C , extremely low moisture simplifies evacuation problems.
P l e a s e send CAB-O-SIL s a m p l e a n d : ( ) General Properties, Functions and Uses (jFcgen-1) ( ) Cab-o-sil in the Rubber Industry (#crub-l) ( ) Cab-o-sil in Butyl Rubber (£cmb-2) ( ) Cab-o-sil in the Lubricating Grease Industry (#cgre-l) ( ) Aqueous Dispersions of Cab-o-sil
