254 



THE INDIA RUBBER WORLD 



January 1, 1921 



Vulcanizing India-rubber by heating in an atmosphere of 

 volatile alkali, such as ammonia or organic alkali, and air, which 

 may also contain inert or reducing gases. About 250 grams of 

 ammonia are used for everj- cubic meter capacitj- of the vulcaniz- 

 ing chamber. Thick articles may necessitate the employment of 

 pressure, obtained preferably by the use of previously compressed 

 inert or reducing gases. — E. Tilche, 67 Rue de Tocqueville, Paris. 

 British patent No. 148,350. 



GERMANY 



Vulcanized Products, soft, elastic, ductile and tenacious, 

 are produced by use of the following chemical substances: (a) 

 ammonium compounds, aliphatic or aromatic amines, or their de- 

 rivatives or salts, such as diphenylamine, diethylaniline, formani- 

 lide, dimethylaniline, dimethyltoluidine, to the extent of 5 per 

 cent or more, and/or (b) aniline sulphate, which in small quanti- 

 ties acts as an accelerator, are added to the materials during vul- 

 canization. — Farbenfabriken formerly Friedrich Bayer & Co. Ger- 

 man patents Nos. (A) 303,984 and (B) 305,6fi7. 



the dominion of canada 



Vulcanization of Rubber. The Method of Accelerating 

 vulcanization which consists in adding to the mixture to be vul- 

 canized an anhydrous compound resulting from the interaction of 

 strongly basic substances with the nuclear monohydroxy deriva- 

 tives of benzene in which the hydrogen of the hydroxy] group is 

 replaced by the radical.— The Xorth British Rubber Co., Limited, 

 assignee of Benjamin Dawson Porritt, both of Edinburgh, Scot- 

 land. Canadian patent No. 204,387. 



Rubber Liquid Dressing for Surfaces of Leather and thb 

 like, comprising a quickly drying combination of a relatively large 

 quantity of asphaltum, a volatile solvent, a relatively small 

 quantity of rubber cement, and a relatively still smaller quantity 

 of black pigment, beeswax and Japan drier.— Alfred R. Caldwell, 

 Whittier, California, U. S. A. Canadian patent No. 204,458. 



Tire Core for Vehicle Tires, Consisting of Rubber Material 

 formed of approximately 40 parts pure Para rubber ; 20 parts vul- 

 canized rubber ; five parts rosin oil ; ten parts zinc oxide ; five 

 parts petroleum ; ten parts flour of sulphur ; five parts am- 

 monium carbonate and five parts baking powder, all amalgamated 

 and vulcanized. — Carl Elwood Judson, Toronto, Ontario, Canada. 

 Canadian patent No. 204,467. 



Vulcanizing Process Which Comprises Heating Under 

 vulcanizing conditions a mixture consisting of rubber-like ma- 

 terial, sulphur and amino-methyl-isopropyl-benzene. — The Selden 

 Company, assignee of Chester Earl Andrews, all of Pittsburgh 

 Pennsylvania, U. S. A. Canadian patent No. 204,779. 



Wood Substitute Formed by a Process Which Consists ii> 

 building up in a mold a plurality of layers of coir fibre mingled 

 or impregnated with a viilcanizablc rubber, compressing the com- 

 position and vulcanizing it.— George Daubney Rose, Manchester, 

 England. Canadian patent No. 205,163. 



Artificial Rubber. An elastic composition comprising gly- 

 cerine, 2% pounds; glue, Sf^ pounds; water, 9 pounds; tannic 

 acid, 2% ounces, and a solution of formaldehyde, 4 ounces. — 

 Ernest E. Cathcart, Tecumseh, Nebraska, V. S. A. Canadian 

 patent No. 205,403. 



Vulcanizing Rubber. A process which consists in adding 

 to the mixture of rubber and other materials a small proportion 

 of a nitrogen derivative of furfuryl and heating the mixture un- 

 der usual vulcanizing conditions.— La Societe Ricard, Allenet & 

 Cie., assignee of Eloi Ricard, both of Melle (Deux-Sevres), 

 France.— Canadian patent No. 205,728. 



N 



OTHER CHEMICAL PATENTS 



THE dominion OF CANADA 



O. 205,701 Coated fabric having base coating containing rubber 

 and no nitrocellulose, surface coating containing nitro- 

 cellulose and no rubber, and intermediate coatings con- 

 taining iticreasing quantities of nitrocellulose and decreas- 

 ing quantities of rubber as they approach the surface. The 

 Canadian Fabrikoid Limited, Montreal, Que., assignee of 

 E. I. du Pont de Nemours & Co., Wilmington, Del., 

 U. S. A., assignee of H. W. Matheson, Montreal, Que. 



GERMANY 



patent applied foe, with date of application 



86,268 (May 3, 1918.) Method for the production of synthetic product 

 similar to caoutchouc. Badische Anilin-und-Soda Fabrik, Lud- 

 wigshafen, Germany. 



PATENTS ISSUED, WITH DATES OF ISSUE 



303,224 "K" (October 3, 1916.) Filling materials for the manufacture 

 of soft and hard rubber goods. Farbenfabriken formerly 

 ^"^'''^''^'' Bayer ft Co.. Leverkusen. near Koln on-Khine. 



329,593 (November 1, 1918.) Method of manufacturing substance* 

 similar to caoutchouc. H. Otto Traun's Forschungslabora- 

 torium G. m. b. H., Hamburg. 



329,676 (May 4, 1918.) Method of manufacturing substances similar to 

 caoutchouc. Badische Anilin-und-Soda Fabrik, Ludwigshafen- 

 on-Rhine, Germany. 



LABORATORY APPARATUS 



POTASH BULB 



TThe illustration shows a potash bulb of the Bender and 

 Holbein type. The two bulbs shown herewith are filled 

 with caustic potash solution to the tops of the outflow tubes and 

 a slight excess of solution is added for 

 the outer space. The potash bulb is 

 operated for carbon dioxide absorption 

 by allowing the gas stream to enter 

 the bulb so that the gas must bubble 

 through each bulb and through the 

 outside solution, finally leaving the ap- 

 paratus through the calcium chloride 

 tube, which retains moisture that other- 

 wise would be carried out, thereby 

 causing loss of weight —Scientific Utilities Co., Inc., 18 East 16th 

 street. New York Citv. 



Potash Bulb 



LABORATORY FILTRATIONS 



Efficient laboratory filtrations arc readily effected either in- 

 dustrially or for analytic purposes through amphibole asbestos 

 of the actinolite and tremolite varieties, which come as long, short 

 and woolly fibers adapted for technical and commercial filtration, 

 prepared by an American concern.— Powhatan Mining Co., Balti- 

 more, Marvland. 



PLATINUM CRUCIBLE WITH CAPSULE COVER 



For determination of volatile matter 

 in coals and coke by the standard 

 method given in Technical Papers 

 Nos. 8 and 76, United States Bureau 

 of Mines, a platinum crucible with a 

 ^ — -^^^ capsule cover is used, as shown in 

 ^^^^■i^^^^^^B the illustration. The percentage of 

 ^B ^^^^^H volatile matter obtained by the use of 



^H J^^^^M S"ch a crucible 10-cc. capacity is 



^B ^^^^m slightly lower than that obtained by 



■K 'f^^^K ^'^*^ "^^ "^ ^ 30-cc. crucible with or- 



^B j^^^V dinary cover, due to the fact that the 



«i d^^^V loss weight of the sample under 



^t^^^^^m '^^■' 's usually less than 0.3 per cent 



^^^^^^^ with the capsule-covered crucible 



Platinum Crucible while it often amounts to one per cent 

 in a crucible with flat cover —Ameri- 

 can Platinum Works, Newark, New Jersey. 



"Crude Rubber and Compounding Ingredients" should be in 

 the library of every progressive rubber man. 



