July 1, 1916.] 



THE INDIA RUBBER WORLD 



537 



CHEMICAL TREATMENT OF RUBBER. 



UNITED STATES PATENT. 



Adhering Rubber to F.vbric. The process of uniting fabric 

 or fibrous material and a rubber compound containing a vulcan- 

 izing medium consists in treating the fabric with a non-vulcan- 

 izing medium, non-detachably associated with the fabric and 

 which has greater adhesion for rubber than the fabric, and 

 finally vulcanizing the rubber to the fabric. [United States patent 

 Xo. 1.184,015. Raymond B. Price, assignor to Rubber Regen- 

 erating Co., Mishawaka, Indiana.] 



Synthetic Caoutchouc. By this process there is heated in a 

 closed vessel, with an acid reagent, a distillate, obtainable by 

 cracking pinene into various hydrocarbons by passing it. in the 

 form of vapor, through a tube heated to a temperature, of be^ 

 tween 572 degre'es and 662 degrees F., and -then cooling quickly. 

 and distilling the hydrocarbons. The resultant mi.xture is heated 

 in a closed vessel, thereby creating pressure and, maintaining the 

 temperature constant while the pressure drops, and until the 

 pressure reaches a point where it remains substantially constant, 

 distilling off the volatile matter, and oxidizing the residue. 

 [Eva Gottschalk, Newark, New Jersey. United States patent 

 No. 1,185,654.1 



THE UNITED KINGDOM. 



Substitute for Celluloid or Le.ather. India rubber is con- 

 verted into a chlorine derivative by dissolving it in carbon tetra- 

 chloride or other solvent, which does not react with chlorine, 

 but is a solvent of the product to be obtained, hydrocarbons being 

 excluded ; and treating with chlorine, or a gaseous mixture con- 

 taining chlorine. A filling agent, such as camphor, may be incor- 

 porated with the material. The solvent is removed by evapora- 

 tion or distillation, or the new derivative may be precipitated by 

 alcohol or other miscible solvent which has no solvent action 

 on the substance. [S. J. Peachey, Stockport, England. British 

 patent No. 1,894 (1915).] 



OTHER CHEMICAL PATENTS. 



UNITED STATES. 



General Bakelite Co., New York City. 

 1,187;230. Reaction product of hexamethylenetetramin and phenolic bodies 

 and method of making same. L. H. Baekeland. Yonkers, 

 N. Y., assignor to General Bakelite Co., New York City. 



1.187.231. Phenolic condensation product and method of making the same. 



L. H. Baekeland, Yonkers. N. Y., and N. Thurlow, New 

 York City, assignors to General Bakelite Co., New York City. 



1.187.232. Process for making insoluble bodies derived from phenol alcohols. 



h. H. .Baekeland, Yonkers, N. Y., assignor to General Bake- 

 lite Co.. New York City. 



DOMINION OF CANADA. 

 •167,969. Rubber substitute. The B. F. Goodrich Co.. New York City, 

 assignee of The Diamond Rubber Co., assignee of D. Spence 

 and A. P. Clark— all of Akron, Ohio. 



coagulating late-x and drving the resultant 



son & Korn, New York' City. " 

 ubbcrizing textile materials. Lucien Liais. 



•Den 



es Paten 



for Ame 



an Inv 



ALBINITF. 



.\ new compounding ingredient known as .Mbinite white is 

 being introduced in the French rubber industry. It if. described 

 as kaolinite, obtained chemically as a double decomposition prod- 

 uct of extreme purity, whiteness, and of impalpable fineness. 

 It is said to act as a vulcanization accelerator and is an inex- 

 pensive and satisfactory substitute for zinc oxide. 



LABORATORY APPARATUS. 



A CHECK VALVE FOR SUCTION FUISKS. 



A N' effective ball v^lve easily made and attached to the usual 

 ** types' of suction Hasks has been devised by G. P. Walton, 

 of the Bureau of Chemistry, U. S. Department of Agriculture. 

 It consists of a glass tube A having an indentation or other 

 check for the ball valve; a glass ball valve with guide D blown 

 from a capillary tube ; an inner glass tube B, and the valve 

 seat C, a short piece of smooth, heavy rubber tubing with square 

 cut ends. The parts are shown assembled and fitted to. the 

 usual form of suction flask. A rubber drain tube, not shown, 



Through 



Replete with information for rubber manufacturers.— Mr. 

 Pearson's "Crude Rubber and Compounding Ingredients." 



completes the apparatus. .\ comparatively slight suction is 

 sufficient to close the valve perfectly, and upon releasing the 

 suction a column of liquid in the flask a fraction of an inch 

 above the valve is sufficient to start the outflow. 



In tfie form of suction-flask not provided with an outlet at 

 the bottom, a suitable vent may be drilled, by using a short section 

 of copper tube in a drill press with carborundum and water for 

 abrasive. To adjust the valve, force the rubber C through the 

 vent, moisten the inner tube B, and push it through the rubber, 

 making a tight joint between the latter and the wall of the 

 flask ; place the ball D in position, and force the outer tube A 

 over the rubber. The rubber should project about 1/16 inch 

 beyond the end of the inner glass tube, which serves merely as 

 a siphon and brace for the valve-seat. 



SPECIAL BINOCULAB MICHOSCOPE. 



A binocular microscope is particularly applicable to the work 

 of an industrial laboratory, both for inspection and research, 

 double optical system the object is viewed with 

 both eyes so that it is seen in 

 relief, as with the unaided vision, 

 and a distinct stereoscopic effect 

 obtained. • The image is also 

 shown in its true form, and not 

 t!;ansposed or inverted as with the 

 regular microscope. 



The binocular microscope is 

 thus of special advantage in ex- 

 amining surfaces and materials of 

 all sorts, as wood, metal, leather, 

 rubber, fabrics, etc., and for 

 noting the results of tool vyork 

 on surfaces. A real perception of 

 depth is obtained when 

 .icwing furrows, cracks, or 

 ike depressions. 

 The model illustrated has 

 an extremely wide range of adjustments, permitting it to be 

 conveniently used for every kind of work to which it may be 

 put. For the examination of transparent or translucent mater- 

 ials, for counting threads in cloth or the like, the specimen is 

 placed upon the stage and light directed through it by the mirror. 

 When examining large surfaces, such as pieces of leather, rubber 

 or paper, which are too large to be placed upon the stage, the 

 upper part of the instrument may be detached and used with 

 the stage as a base. This is the arrangement shown in the 

 illustration. 



The magnification obtainable with the outfits supplied with 

 this instrument varies from 10 to 74 diameters. [Bausch & Lomb 

 Optical Co., Rochester, New York.] 



