65 Manufacturers
and Users of Paint
Products
solve these problems with P-E infrared RAW
MATERIALS CHECK
Paint a n d resin ingredients may be checked for quality and uniformity in a matter of minutes with a Perkin-Elmer infrared spectrometer. I n frared is also used t o evaluate new raw materials and new sources for raw materials already in use.
Infrared spectrum of a new batch of an alkyd resin, above, shows that the resin has been modified with P-tertiary butyl benzoic acid. The absorption bands at the points indicated by arrows are deviations from the standard spectrum for the resin, and are characteristic of the additive.
PROCESS DEVELOPMENT
1. RAW LINSEED OIL 2 DRIED LINSEED-0IL.
Infrared analysis is particu larly useful to t h e research and development chemist. P-E infrared instruments enable him t o identify newo r unknown materials quickly, check structural changes dur ing polymerization, or chart the effects of drying and aging on film composition.
Above, superimposed spectra of raw and dried linseed oil tell the spectroscopist the degree and type of unsaturation in the dried oil caused by polymerization. The spectra also indicate the struc tural changes that have occurred as a result of oxidation.
QUALITY CONTROL
In checking t h e final concen tration of important ingredi ents, P-E infrared instruments give a n exact a n d rapidly obtained "fingerprint" of the finished product. Chemical compounds used a s standards can deteriorate with age and become misleading; infrared spectra serve as permanent and unvarying records of the desired material.
MELAMINE
ALKYD*
ALKYD
•AlKYD
Spectrum of finished resin blend containing a mixture of phthalic type alkyd, urea-formaldehyde and melamine-formaldehyde res ins. Infrared spectrometry makes possible the rapid quantitative estimation of each resin component. This ratio cannot be esti mated satisfactorily by any chemical method.
T h e applications above, from data supplied by The Glidden Company, are typical of the ways in which Glidden and other paint a n d resin manufacturers are using Perkin-Elmer infrared instruments to effect important savings in laboratory time, process efficiency and quality control. These uses for infrared analysis represent only a few of the ever-widening areas in which infrared instruments are serving t h e process industries. Perkin-Elmer, the world's leading manufacturer of infrared instruments, can help you p u t this valuable tool to work solv ing your analytical problems. Write for complete information.
I N S T R U M E I M T
D I V I S I O N
Perkin.-Elmer Ν Ο
RW A L Κ
oration Corp
P-E Model 21 double-beam spectrophotome ter. The Model 21 is used in more industrial and academic laboratories than any other infrared instrument.
C O N N E C T I C U T
FEB.
4, 1 9 5 7 C & E N
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