April 1, 1921 



THE INDIA RUBBER WORLD 



497 



CHEMICAL PATENTS 

 THE UNITED STATES 



TIRE Filler. Comprising a mixture formed ok the following 

 ingredients : Crude rubber, a compounding ingredient or 

 filler, a vulcanizing ingredient, an accelerator, a leavener and a 

 vehicle — the mixture having minute air pockets distributed 

 throughout, thereby providing the mixture with a rebounding 

 quality. — Vincent Cuttitta, New York, New York. United States 

 patent No. 1,369,626. 



THE DOMINION OF CANADA 



RfBiiER Compound kinsisting oi- ikuhk kuhbkr, gr.\n'Ulated 

 iron slag and cork flour, the quantity of rubber in the compound 

 by weight being less than the combined weights of the iron slag 

 and cork flour. — Eugene Von Vergyas, Washington, British Co- 

 lumbia, Canada. Canadian patent No. 208,194. 



Sizing Fibrous Materials, Process and Product. The 

 process of treating fibrous material which comprises applying 

 thereto a lubricant including castor oil and beeswax and treating 

 the material thus prepared with a coating of rubber. The manu- 

 factured article having the individual fibers coated with waxy 

 lubricant while maintaining the spaces normally present between 

 the fibers substantially open and a layer of rubber intimately as- 

 sociated with the fibrous material, the proportion of lubricant be- 

 ing relatively small to obviate deleteriously affecting the bond be- 

 tween fiber and rubber. — The Canadian Consolidated Rubber Co., 

 Limited. Montreal, Quebec, Canada, assignee of .\lfred E. Jury, 

 Newark, New Jersey, U. S. A.. Canadian patent No. 208,397. 



Process of Compounding Rubber consisting of incortorating 

 glue containing 7 to 13 per cent of water and implasticized 

 rubber to a mixing or milling action at a temperature suflicient 

 to plasticize the glue and substantially dry the mi.xture. — The 

 Goodyear Tire & Rubber Co., assignee of William G. O'Brien, 

 both of .■SLkron, Ohio, U. S. A. Canadian patent No. 208.406. 



Process of Reclaiming Waste Rubber comprising disintegrat- 

 ing it. subjecting the disintegrated mass to the action of a lieated 

 liquid ibath containing approximately 10 to 15 per cent by weight 

 of caustic soda in aqueous solution for appro-ximately from six 

 to 20 hours at a pressure of from 50 to 200 pounds per square 

 inch. Then subjecting the treated waste to the action of a solvent 

 com|)rising approximately one part by weight of phenylene dia- 

 mine, two parts by weight of paraflfine oil, two parts by weight 

 of mineral rubber, one part by weight of rubber resin, two parts 

 by weight of acetic acid, and washing and drying the resulting 

 mass. — Frank L. Kryder, Akron, Ohio, U. S. .\. Canadian patent 

 No. 208,506. 



THE UNITED KINGDOM 



India Rubber Composition containing china or other clay 

 which has been treated with water and a deflocculating agent such 

 as sodium carl)onate or ammonia, and which has been dried while 

 in a dcflocculated state. In an example, 160 parts of the treated 

 and dried clay are mixed with 228 parts of rubber and 12 parts 

 of sulphur. — P. Schidrowitz, 57 Chancery Lane, and W. Fclden- 

 heimer and W. W. Plowman, 20 Holborn Viaduct, both in Lon- 

 don. British patent No. 153,343. 



Devulcanizing Rubber. Vulcanized rubber is df.vui.canized 

 by simultaneous treatment with a benzene hydrocarbon, such as 

 ten per cent of xylol or one of its homologs and a carbocyclic 

 ainido compound such as 2J/2 per cent of aniline or one of 

 its homologs in the presence of a substance capable of absorbing 

 or combining with sulphur, such as a hydrate of an alkali metal. 

 The treatment is conducted in a digester in which the temperature 

 corresponds with a steam pressure of 60 to 150 pounds per square 

 inch. — J. Young and W. W. Benner, Akron, Ohio, U. S. A., 

 British patent No. 153,646. 



Vulcanizing India Rubber, .^n arvl sub.stituted thiourea 

 containing one or more alkyl groups, one of which is in ortho 

 position to the nitrogen of the thiourea, is used as an accelerator 



m the vulcanization of rubber. The accelerator is the product of 

 the reaction of carbon bisulphide on an ortho-alkyl substituted 

 aromatic amine, namely, orthotoluidinc. In an example, a mix- 

 ture of 50 parts of rubber, 45.5 parts of zinc oxide, 3.5 parts of 

 sulphur, and one part of di-ortho-toluyl-thio-urea is vulcanized 

 by steam at a pressure of 40 pounds in ten minutes. — The Good- 

 year Tire & Rubber Co., .\kron, Ohio, U. S. .■\.., British patent 

 No. 153,890. 



Rubber Substitute is made by mixing a cellulose deriva- 

 tive, with or without a solvent, with a larger quantity of a 

 gelatinizing medium than is necessary for gelatinizing the cel- 

 lulose derivative, adding large quantities of organic or inorganic 

 filling materials, heating to drive oflf water, and molding under 

 heat and pressure. In an example, 400 grams of nitrocellulose 

 arc mixed for half an hour with 260 grams of water, and 

 1200 grams of barytes ; 300 grams of a gelatinizing medium 

 such as cthyl-acetanilide is added and kneaded for an hour, when 

 the temperature is raised to evaporate the water. The mass is 

 molded under pressure at about 130 degrees C, and on cooling 

 is ready for use. — P. Balke, and G. Leysieffer, Troisdorf, near 

 Cologne, Germany. British patent No. 154,157. 



OTHER CHEMICAL PATENTS 



GERMANY 



PATENTS issued WITH DATE OF ISSUE 

 333.496 (AuRUft 2J. 1918.) Methtd for makint; n.l.lfr-like products. 



P-adisrlie .'Knilinund Soclafahrik, I.iuhvieshafen on Rhine. 

 332,974 (February 21. 1919.) Process foi- drying crude rubber with the 



help of indifferent gases. AktiensreselUchaft MetzeJer & Co., 



Munich. 



LABORATORY APPARATUS 



LABORATORY STOVE 



ANEW, simple and efficient electric stove for laboratory 

 use is shown in the accompanying illustration. It is of 

 durable construction of sheet metal, with cord and plug 

 ready for attach- 

 ment to any con- 

 V e n i e n t lamp 

 socket. It can be 

 used for direct or 

 alternating cur- 



^= 



rent of 110 volts.— Th 

 Rochester, Xcw York. 



Electric Stove 



Will Corporation, 



MERCURY SEALED ABSORPTION TUBE 



One of the most popular absorption bulbs 



for CO; determinations is the new Fleming 



mercury-sealed bulb shown in the illustration, 



which shows plainly the method of filling. 



Place just enough mercury in lower trap T 



to seal. Wet a small piece of cotton and lay 



around F to keep asbestos out of mercury. 



Fleming Over this place small amount of asbestos. 



.\bsorption Fill 5" with 20-mesh soda lime, well screened 



Tube from dust, preferably 2 per cent moisture 



soda lime is used, and after filling run air 



through warm water and into / until absorbent increases about 



10 per cent in weight. Plug / loosely with cotton. Pack R with 



asbestos and fill P with phophorus pentoxide. Tube C of hollow 



top stopper is packed as follows : A little pledget of cotton is first 



inserted into this tube, followed with a little asbestos. — Eimer & 



.\mend, 211 Third avenue. New York. 



