AicisT 1. 1920] 



THE INDIA RUBBER WORLD 



733 



THE DOMINION OF CANADA. 



Art ok \l Li anizing Caoltchoic. The process of ctTecting the 

 curing of rubber which consists in tirst bringing together under 

 reacting conditions sulphur and paranitroso-dimethylaniline in the 

 presence of an excess of aniline to produce a sulphur nitrogen 

 accelerator, and subsequently incorporating the latter in the 

 caoutchouc mix and vulcanizing it. 



The process of elTfecting the curing of ruliber which consists 

 111 tirst bringing together under reacting conditions sulphur and 

 ihidcarbaiiilide or derivative thereof to produce a sulphur nitro- 

 gen accelerator, and subsequently incorporating the latter in the 

 caoutchouc mix and vulcanizing it. 



The process of effecting the curing of rubber which consists in 

 tirst bringing together under reacting conditions sulphur and 

 i)roteids or nitrogenous derivatives thereof to produce a sulphur 

 nitrogen accelerator, and subsequently incorporating the latter 

 in the caoutchouc mix and vulcanizing it. (The Gooclyear 

 Tire S: Rubber Co., assignee of Clayton Wing Bedford, both of 

 Akron, Ohio. U. S. A. Canadian patent Xo. 201,277.) 



THE UNITED KINGDOM. 



Bottle and Like Capsules. .\ solution of the chlorine deriva- 

 live of india rubber known as "duroprene" is lirst applied to the 

 bottle or other article, and then a medium which will cause the 

 duroprene to precipitate is applied, any remaining solvent and 

 precipitant being afterwards allowed to evaporate. The duroprene 

 may be dissolved in benzene or other solvent, and the neck of 

 the corked or stoppered bottle dipped into the solution and after- 

 wards into methylated spirit or other precipitant. (A. Larable 

 and United Alkali Co., Cunard Building, Liverpool. British pat- 

 ent No. 141,220.) 



CoLORi.vG anp Vulcanizing India Rubber. The color bases of 

 the basic synthetic organic dyes are mixed with natural or arti- 

 ficial caoutchouc or caoutchouc-like substances and sulphur, and 

 the product is vulcanized under heat. These color bases act either 

 as accelerators or as coloring agents, or both. In an example 

 57 parts of rubber are mixed with 40 parts of zinc oxide, three 

 parts of sulphur, and one part of the color base of the basic dye 

 auramine-0. Other dyes mentioned, of which the color bases 

 are used, are : methyl violet B, methylene blue, Bismarck brown, 

 magenta, rhodamine B, benzoflavine, safranine, Meldola's blue, 

 thionine blue, thioflavine T. (L. Gaisman, Spring Bank House, 

 Woodley. Stockport, Cheshire, and J. L. Rosenbaum, 11 Trafalgar 

 Square, .\shton-under-Lyne. British patent No. 141,412.) 



THE FRENCH REPUBLIC- 



RuBBER. — Improvements in process for reclaim- 

 ted. French patent No. 



Reclaim I N'( 

 ing rubber. (Xylos Rubber Co, 

 503,661.) 



GERMANY. 



Increasing Elasticitv of Vulcanized .Artificial Rubbers. — 

 (Farbenfabriken formerly Friedrich Bayer & Co., Leverkusen, 

 iicir Koln am Rhein. German patent No. 301,757.) 



Proce-SS of Manufacturing Plastic Rubber-like Masses. — 

 The liquor which settles out in the saponification of resins is 

 purified by sedimentation or filtration, then treated in a stirring 

 vessel with dilute sulphuric or hydrochloric acid in a finely- 

 <iivided state, while heating at about 100 degrees C. The result- 

 ing mass is slightly acid, insoluble in water, soluble in alcohol, 

 ether, and caustic alkali : it is plastic when warm and brittle in 

 the cold. (P. B. Ribot, Schwabach. German patent No. 315,847.) 



Plastic Composition. — Formation of rubber-like masses out 

 <i( cellulose waste by adding emollients. (Franz Clouth, 

 Rheinische Gummiwarenfabrik, Koln-Nippes. German patent 

 No. 324,944. ) 



DENMARK. 



-Artificial Rubber. — Resin is melted, especially the balsam 

 and refuse resin, with addition of calcium chloride, and the mix- 

 ture is distilled with continued addition of calcium chloride and 

 calcium chlorate, and the rubber-like mass is mixed with rubber 

 or rubber regenerates freed from factice, tar or the like, and then 

 vulcanized. (F. de la Rosee. Danish patent No. 24,565.) 



HOLLAND. 



.Artificial Rubber. — Stearate of aluminum, manganese, chro- 

 mium or iron is dissolved in hydrocarbon and introduced into 

 linoleum at 200-300 degrees C. (.Ali-Cohcn, Dutch patent No. 



3,293.) 



NORWAY. 



Treating Vulcanizable Plastic Materials. — Consisting of 

 admixing the vulcanizing agent and subjecting the combination 

 to vacuum. (Rubber Regenerating Co. Norwegian patent No. 

 29,803.) 



LABORATORY APPARATUS. 



DIAL GAGE FOR SHEET RUBBER. 



A MODIFIED form of the customary upriglit dial gage for sheet 

 rubber is shown in 

 the illustration. The pres- 

 sure of the disk on the 

 stock is regulated by re- 

 movable weights on a 

 spindle, instead of by a 

 spring. This feature 

 gives the instrument 

 adaptability in gaging 

 soft stocks and for that 

 reason the gage is finding 

 favor with rubber manu- 

 facturers. (B. C. Ames 

 & Co., Waltham, Massa- 

 chusetts.") 



LABORATORY DISH. 



A standardized weigli- 

 ing dish for laboratory 

 purposes has lately 

 been perfected and made 

 the subject of a recent 

 patent. The method of 

 standardization follows : 



A standard weight is decided upon for the dish which may be 

 selected by av- 

 e raging the 

 weight of a num.- 

 ber of dishes. 

 Each dish is 

 then very care- 

 fully and accur- 

 ately weighed 

 with the equalizer attached. If the dish is found to be above 

 the standard weight previously selected, the cap of the equalizer 

 stud is ground to remove sufficient metal to bring the weight of 

 the dish exactly to the standard selected. If the weight of the 

 dish is below this standard the cap is removed from the stud 

 and powdered lead placed in the container in sufficient quantity 

 to bring the weight to the standard selected. (Mojotinier Bres. 

 & Co., Chicago, Illinois.) 



Rubber Thickness Gage. 



Stand.\rdized Weighing Dish. 



"Crude Rubber and Compounding Ingredients" and "Rub- 

 ber MaChinerv," by Henry C. Pearson, should be in the library 

 of every i)rogressive rubber man. 



