Eliminate skinning problems in hot melt adhesives with Emery 3795-D Polyamide Resin The bar chart (right) shows Emery 3795-D has six times more resistance to skinning than the nearest competitive resin. So now the problems of thermal degradation, one of which is shown above, can be largely overcome, thanks to the superior oxidative and thermal stability of this High Performance Polyamide Resin. In addition, viscosity stability is outstanding. Emery 3795-D shows less than 5% viscosity change after 60 hours molten at 190°C, whereas standard high performance resins show over 100% increase in viscosity after only 10 hours under the same conditions. Field tests confirm the benefits this greatly improved stability provides adhesive manufacturers and users: cleaner machine operation with lower service and maintenance costs, plus more uniform adhesive bonds. All of Emery's high performance polyamides—including 3792-D, 3794-D, and 3796-D—show superior oxidative and thermal stability. They also offer excellent adhesion to a variety of substrates, fast set, high impact strength, low water absorption, good electrical properties, dimensional stability, sharp melting point, solvent and product resistance, low odor (especially when held molten), and retention of physical properties on aging. Emery will endeavor to develop special resins, where volume warrants, to meet your own special end use requirements, such as heat resistance, adhesion to specific substrates, and FDA approval. Use coupon to request samples and information. 14 C&EM
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Standard High Performance Polyamide Resin
Competitive resin
Emery 3 7 9 5 - D
RESISTANCE TO S K I N N I N G TEMPERATURE 190° C
Unique tribasic acid, at 2O0/lb., offers economical source for new or improved products
Polyester flexibility made to order w i t h Empol® Dimer Acids If you are seeking greater control over polyester flexibility, the u n s a t u r a t e d polyester strips above will be of special interest to you. T h e varying degrees of flexibility t h e y exhibit h a v e been achieved by varying t h e weight ratio of t h e E m p o l 1018 Dimer Acid/phthalic anhydride combination. T w o characteristics of E m p o l Dimer Acid account for t h e flexibility, as well as toughness, t h a t it produces in polyesters and other polymers, such as nylons and polyurethanes. First, t h e long chain length between carboxylic groups—approximately 16 carbons—makes dimer acid almost twice t h e length of t h e next longest dicarboxylic acid now commercially available. Second, t h e molecular weight of t h e dimer molecule is approximately 565, almost three times t h a t of other common dicarboxylic acids—yet dimer is a liquid. T h e r e are now six E m p o l Dimer Acids developed specifically for building flexibility and toughness into polymers. For more extensive cross-linking, E m e r y offers two products with high trimer acid content. See table. Check on t h e interesting possibilities inherent in this unusual chemical. Send t h e coupon for complete technical information.
TYPICAL COMPOSITION Dimer Acid (Csr» Dibasic Acid) M. W. Approx. 565 Empol " " " r ' " ? ' "
1010 Dimer Acid 1014 " 1016 " 1018 " 1022 " 1024 " 1040 Trinier Acid 1043 "
98 95 87 83 75 75 5 20
Monobasic Trimer Acid Acids (C-,4 Tribasic (Cis Fattv Acids) M.W. Acids) M.W. Approx. 845 Approx. 282 o
4 13 17 22 25 91 80
Tr 1 Tr Tr 3 Tr 4 Tr
E m p o l - 1040 Trimer Acid presents an unusually a t t r a c tive combination of advantages: • Highest molecular weight (approx. 845) of a n y commercially available organic acid. • Tribasic n a t u r e . . . one of t h e few commercial sources of tri-functional acid. • Liquid form. I t ' s t h e only tribasic acid offered in t h e liquid state. • N o w selling a t 20c/lb in t a n k c a r quantities . . . t h e lowest price since trimer acid was introduced by E m e r y in 1950. E m p o l 1040 has found use as flexibilizer for epoxy resins and in t h e preparation of esters, polyamides, urethanes, alkyds, and corrosion inhibitors. T o discover how E m p o l 1040 might help you in t h e development of new or improved products, send t o d a y for an evaluation sample and further information. Check and mail coupon.
INDUSTRIES, INC. Organic Chemicals Division Dept. 620, Carew Tower Cincinnati, Ohio 45202 Western Operations, Santa Fe Springs, California Emery Industries (Canada) Ltd., London , Ontario Unilever-Emery N. V., Gouda, The Netherlands Export Division, Cincinnati Please send: • Emery High Performance Polyamide Resin Data Sheet also samples: 3792-D D, 3794-D • , 3795-D • , 3796-D • • Emerez Polyamide Resins Brochure • Empol Dimer Acid Brochure • and Technical Bulletin 425A, "Azelaic and Dimer Acids in Flexible Unsaturated Polyesters" • Technical Bulletin 438B, "Empol 1040 Trimer and Dimer Acids for Flexibilizing Epoxy Resins; • and evaluation sample. Name Company
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