SILICOLOGY Silicone Surfactants' Peak Performance Cuts Costs Of Rigid Foam Insulation Ask the man who knows insulation. He'll tell you about polyurethane rigid foams and the big job they've been doing since the introduction of silicone surfactants. Rigid foams have become the choice for insulating refrigerators, reefers, storage tanks, and hot or cold pipes. They can be foamed on the spot. They're light, low in thermal conductivity. Silicone surfactants have made a big difference. For example, finer and more uniform cell structure eliminates voids and areas of high density so that you get better insulation. Full rise lets the foam fill all nooks and crannies, even travel around corners. You get more foam, lower density, lower K factor. There's also a higher percentage of closed cells resulting in less air pene-
tration and heat transfer by convection. As the o r i g i n a t o r of surfactants for polyurethane foams and the leading innovator in silicone technology, Union Carbide is constantly developing new products to do a better job. You select from the most complete product line, get the specific surfactant for your particular system.
below. In the meantime, make it a point to see your Silicones Man—he'll be glad to give you complete information on silicones for foams and general uses.
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For example, L-530 is recommended for difficult foaming conditions. Added to either resin or "quasi" component, L-530 is designed for sorbitol and aromatic started polyols. Another silicone surfactant, L-531, is suited for sorbitol started polyols. Used by adding to either resin or "quasi" component, L-531 is a superior emulsifying agent for resin and fluorocarbon premix. Silicone L-5310 is preferred for sucrose as well as sorbitol started polyols. This surfactant is recommended for the most stringent foaming conditions.
Silicone surfactants make a big difference, as rigid foam on the right shows. L-5310 surfactant gives higher rise, lower density, better insulation values using the same quantity of raw materials.
UNION CARBIDE
Highly versatile, L-5310 is the outstanding general purpose surfactant, well suited to a variety of systems.
SILICONES
If you formulate polyurethane foams, consider the advantages of Union Carbide silicone surfactants. For full information, complete and mail the coupon
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NAME_ TITLE_ COMPANY. Foamed-in-place polyurethane rigid foam provides the insulation f o r t h i s huge reefer, which will carry meat and other refrigerated products. Photo Courtesy of Trailmobile
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