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U.S.I. CHEMICAL NEWS
May
CONTINUED
Polyethylene
unchanged. T h i s development should m a k e it possible to p a c k a g e foods, colognes, o t h e r toiletries c o n t a i n i n g perfumes, a r o m a t i c solvents, min e r a l and vegetable oils a n d aerosol formula tions in polyethylene films or flexible con t a i n e r s — without loss of volatile c o n s t i t u e n t s or entry of d e t e r i o r a t i n g gases. T h e fluorination process is claimed to be simple and economical. Film or bottles are washed free of lint, grease, dust and all for eign m a t t e r which m i g h t cause fluorine to ignite the polyethylene. After this, the film or c o n t a i n e r is c o n t a c t e d with p u r e fluorine or a fluorine-inert gas m i x t u r e , at room tem p e r a t u r e or at u p to 5 0 ° C . T h e length of con tact varies d e p e n d i n g upon the e q u i p m e n t , fluorine c o n c e n t r a t i o n , t e m p e r a t u r e and thick ness of film or bottle. While clarity, flexibility, tensile s t r e n g t h , heat scalability and ultraviolet t r a n s m i t t a l a r e claimed to remain u n c h a n g e d , p e r m e a b i l ity of the polyethylene is d e c r e a s e d many fold. In a typical test with a volatile liquid, 5.6% of ally] e a p r o a t e was lost from an u n t r e a t e d polyethylene bottle in 40 days. Only 0 . 0 5 % was lost from a bottle which h a d received a six-hour fluorine t r e a t m e n t . T e s t i n g for oxy gen transfer, an u n t r e a t e d film t r a n s m i t t e d 303 cc per 100 s q u a r e inches of surface in 24 h o u r s . A treated film t r a n s m i t t e d only 46 cc.
Silicone Additives Insure Uniform Cell Structure in Flexible Urethane Foams Silicones a r e now b e i n g a d d e d to flexible p o l y u r e t h a n e foams to give smaller, m o r e even cell s t r u c t u r e , uniform resilience and flexi bility, and b e t t e r a p p e a r a n c e . O n e type is a water-dispersible emulsion which can he added directly to the catalyst p h a s e of the foam system. T h e m a n u f a c t u r e r r e c o m m e n d s that it be a d d e d as the last com ponent when m a k i n g up this p h a s e , and c l a i m s
that it will r e m a i n uniformly d i s p e r s e d from several d a y s to two weeks in most catalyst systems. A n o t h e r type is a fluid a d d e d directly to t h e p r e p o l y m e r and dispersed by t h o r o u g h agitation. Flexible p o l y u r e t h a n e foams have evoked wide-spread interest as insulation for both i n d u s t r i a l and c o n s u m e r use, as c u s h i o n i n g , and for a variety of specialty a p p l i c a t i o n s . T h e y can be p r o d u c e d from the reaction of polyesters with d i i s o c y a n a t e s . An i n t e r m e d i ate that can he used to p r o d u c e the polyesters is u.s.i. ISOSEBACIC® Acid, a m i x t u r e of C-10 ibasic acids.
•
TECHNICAL
Information items may
Chemicals Co.
1958
DEVELOPMENTS
about manufacturers of these be obtained by writing U.S.I.
Radioactive isotopes and isotope-labeled com pounds a r e described in a new price list now available. Included are C-14 compounds, heavy water, deuterium- and tritium-labeled compounds, N-15 compounds of high isotopic concentration. No. 1350 Fatty amines are discussed in new 24-page book let covering method of manufacture, applications, chemical reactions, vapor pressure, solubility and handling. No. 1351 1723 Voluntary national standards approved by the American Standards Association are listed in free 67-page index just published. Standards in fields of chemicals, petroleum, rubber, textiles, a r e included among others. No. 1352 Sodium dispersions "which improve chemical re action efficiencies by providing more active surface area a r e described in 42-page booklet. Latest production equipment for continuous prep aration of dispersions covered. No. 1353
Polyurethane f o a m containing silicone a d d i t i v e has smaller, more uniform cell structure t h a n other samples containing no silicone.
New Sterilizing Method Employs Ethylene Oxide in Safe Aerosol Formulation T h e U. S. D e p a r t m e n t of A g r i c u l t u r e ' s E n t o m o l o g y R e s e a r c h Division r e p o r t s t h a t they have found a way to c o m b i n e h i g h l y volatile e t h y l e n e oxide with o r d i n a r y aerosol p r o p e l l e n t s to form a non-flammable steriliz ing formulation. Ethylene oxide is a k n o w n g e r m i c i d e , insec ticide and s t e r i l a n t . but its highly flammable n a t u r e h a s been a d e t e r r e n t to its w i d e s p r e a d use for t h e s e a p p l i c a t i o n s . T h e new aerosol is designed for sterilizing sensitive m a t e r i a l s w h i c h cannot stand treat m e n t by s t e a m , dry heat or liquid c h e m i c a l s .
PRODUCTS
OF
Paper-strip electrophoresis analysis of various proteins, hemoglobins, amino acids and many organic and inorganic mixtures is outlined in a new catalog describing equipment for the pur pose. No. 1354 New organic phosphate insecticide (Ο,Ο-diethyl S-p-chlorophenyl-lhiomethyl phosphorodithicate) is claimed non-systemic, long-residual, less haz ardous than many other organic phosphates. For control of mites and broad range of other insects. No. 1355 Plastic pipe for safe transportation of drinking w a t e r is discussed in new 12-page folder. Includes types of plastics used, method of joining lengths, suitable applications, standards set by Natl. Sanitation Foundation. No. 1356 Chemical analysis of solid surfaces by nuclear methods is described in 33-page U. S. Army re port which can now be purchased. Methods used to detect all elements to depth of3 several microns (sensitivities from ΙΟ'-ΙΟ" gm/cm ). No. 1357 Dangerous properties of over 8,500 chemicals, and safe practices in handling, storing and ship ping, are outlined in a 1476-page book just put on sale. Toxicity, fire, radiation, air pollution, explosion hazards a r e covered. No. 1358 Tritiated thymidine is now offered in research quantities a s a new tool for studies of growth. Material is said to be suitable for investigating cell formation and turnover, genetic patterns, effects of intracellular radiation and growth inhi bition in neoplasms. No. 1359
U.S.I
HEAVY CHEMICALS
Alcohols: Ethyl (pure and all denatured formulas); Proprietary Denatured Alcohol Solvents SOLOX©, FILMEX©, ANSOL© M, ANSOL PR.
Sodium/ Metallic: cast solid in tank cars, steel drums, pails; bricks in barrels, pails. Sodium Peroxide, Sodium Sulfite, Sodium Sulfate Ammonia, Anhydrous: commercial & refrigeration. Tank cars or tank wagons. Ammonium Nitrate, Nitric Acid, Nitrogen Fertilizer Solutions Phosphatic Fertilizer Solution: wet process phosphoric acid. Sulfuric Acid: all strengths, oO Baume to 4 0 % Oleum. Also Electrolytic grade to Federal specifications. Tank cars or tank wagons. Caustic Soda, Chlorine
Organic Solvents and Intermediates: Normal Butyl Alcohol, Amyl Alcohol, Fusel O i l , Ethyl Acetate, Normal Butyl Acetate, Diethyl Carbonate, DIATOLOV, Diethyl Oxalate, Ethyl Ether, Acetone, Acetoacetanîlîde, Acetoacet-Ortho-Chloranîlîde, Acetoacet-Ortho-Toluidide, Ethyl Acetoacetate. Ethyl Benzoylacetate, Ethyl Chloroformate. Ethylene, Ethyl Sodium Oxalacetate, Sodium Ethylate, ISOSEBACIC© Acid, Sebacic Acid, Urethan U.S.P. (Ethyl Carbamate), Riboflavin U.S.P., Pelargonic Acid, and 2-Ethyl Heptanoic Acid.
OTHER PRODUCTS PETROTHENEii Polyethylene Resins Pharmaceutical Products: i>r.-Methionine, N-Acetyl-OL-Methionîne, Urethan USP, Riboflavin USP, Intermediates.
Animal Feed Products: Antibiotic Feed Supplements, BHT Products (Antioxidant), Calcium Pantothenate, Choline Chloride, CURB AY B-G®, Special Liquid CURBAY, VACATONE©, Menadione (Vitamin K3), m.-Methionine, MOREA® Premîx, Niacin USP, Riboflavin Products, Special Mixes, U.S.I. Permadry, Vitamin B ]2 Feed Supplements, Vitamin D3, Vitamin Ε Products, Vitamin Ε and BHT Products.
U.S.I. SALES OFFICES
U.S.INDUSTRIAL CHEMICALS CO. Division of Notional Distillers and Chemical Corporation 9 9 Park A v e n u e , N e w York 1 6 , Ν . Y.
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