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Photographs by Sikorsky Aircraft Heat is high, space is limited, bends are sharp i n today's complex electrical systems. In the S-56 helicopter, for example, cables snake through engine compartment, squeeze by cherry-red manifolds, loop over hinges t o reach landing lights in clam shell doors. For this and comparably destructive environ-

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ments, wire makers seeking to develop vinyl insulation with appropriate properties in thin section need better hest stabilizers . . . stabilizers with excellent dispersion, improved moisture resistance . . . stabilizers that provide greater volume resistivity, greater insulation resistance.

Dutch Boy stabilizer research vinyl insulation tougher, more

These photographs show how National Lead research helps vinyl producers in one field . . . electrical insulation . . . overcome difficult stabilization problems and so broaden the market for their products.

National Lead researchers do as much and more for producers of many additional vinyl products. Recently, for example, they came

up with "Dutch Boy" stabilizer, Temex 3. This unique stabilizer provides both stabiliz­ing- and chelating action . . . greatly aids per­formance of vinyl flooring. Eighteen other "Dutch Boy" stabilizers boost the life or im­prove the usefulness of other vinyl products.

Get acquainted wi th useful, versat i le "Dutch Boy" Chemicals. Write for handbook.

Researcher looks for tell-tale white in colored sample of proposed insulation. In this test, National Lead technician confirms that "Dutch .3oy" stabilizer recommended for customer's proposed new vhin vinyl insulation disperses properly. Im­proper dispersion would be signalled by white specks on background green of sample. Excellent dispersion is a prin­cipal reason for the wide use of "Dutch Boy" stabilizers when vinyls undergo very high heat in process or use and when maximum available stabilization action is needed.

Immersion proves "Dutch Boy" stabilizer resists water and pro­tects insulation. Using standard Underwriter's procedures, National Lead technicians put a customer's experimental high temperature insulation through water-immersion test. Commercially extruded wire is tested in 50 to 500 foot lengths. It must go weeks at voltage, show less than 10% resistance loss from all causes . . . including water absorp­tion or scoring of thin coating by oversize particles that might have stuck in die. When properly stabilized with "Dutch Boy" stabilizers, thin stocks pass this test easily.

helps make thin heat resistant

Z?//7^ff^ CHEMICALS"^ NATIONAL· LEAD COMPANY, 111 Broadway, New York 6, Ν. Υ.

In Canada: CANADIAN TITANIUM PIGMENTS LIMITED 630 Dorchester Street, West · Montreal.

Oven separates "men" from "boys". In this oven, re­searchers age various insulation compounds ats l ig i i t -ly above service temperatures. Then they condition the compounds for one hour at 95°C and, at -the same temperature, measure their volume resistivity. Aim of test is to determine compounds that will -maintain maximum electrical resistivity. In the ram shown above, "Dutch Boy" Dythal® stabilizer ga7«e best re­sults. This stabilizer does well in 8-mil, 10 S°C wire.

Insulation breakdown test at Vi of service th*<ckness com— pletes tests. After determining the most suitable stabilization for a proposed compound, National Lead is sometimes asked to run an insulation ^breakdown, test. For this test, lengths of wire are p:ro(luc«d by the customer with the insulation, at Vz searvice -thick­ness. Here you see a run in progress on8—mil, JL05°C stock protected by Dythal stabilizer, Better per­formance than ever before is now being obtained i n thin, high temperature compounds. Wi-th further· research, still higher values are expected.

7 "Dutch Boy" stabilizers meet most vinyl insulation neecls. Each o f these products of National Lead research is a commercially proved product. Among- them, you'll find the right stabilizer f o r all elec­trical and a variety of other opaque vinyl products,

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