•EBRUARY.l, 1921 



THE INDIA RUBBER WORLD 



339 



c 



CHEMICAL PATENTS 



THE UNITED STATES 

 ~<OMPOS1TION FOR SEALING PUNCTURES IN PNEUMATIC TiRES, 



consisting of ground wood, comminuted mica, soapstone and 

 water. — Nelson 0. Selby, Middletown, Ohio. United States 

 patent No. 1,363,438. 



Vulcanized Rubber Consisting Bei-ore Vulcanization of a 

 mixture of rubber, inert matter, selenium, and an accelerator 

 of the aromatic scries. — Charles R. Boggs, Arlington Heights, 

 Massachusetts, assignor to Simplex Wire & Cable Co. United 

 States patent No. 1,364,055. 



the united kingdom 



Plastic Compositio.ns Suitahi.k for Use as Substitutes for 

 india rubber, artificial leather, insulation, paints, varnishes and 

 cements are obtained by mixing alkyl, aryl or aralkyl ethers of 

 cellulose, starch, dextrine or other carbohydrates, or of their 

 derivatives or conversion products, with the viscous oily liquids 

 obtained when acetylene reacts in the presence of aluminum 

 chloride with the hydrocarbons occurring in tar oils and pos- 

 sessing a boiling point above 140 degrees C. Mixing may be 

 effected with or without the use of volatile solvents, and to the 

 mixture may be added other plastic substances, softening sub- 

 stances, dyes, filling materials and pigments. — L. Lilicnfeld, 1 

 /^eltgasse. Vienna, Austria. British patent No. 149,319. 



Synthetic Resinous or Asphalt-like Bodies Obtained by 

 treating phenols with oxygen under pressure. — F. Fischer, 2 Kaiser 

 Wilhelm Platz, Mulheim, Germany. British patent No. 149,979. 



Synthetic Resins. Polymerized Coumarone, Indene, Etc. — 

 The Barrett Co.. 17 Battery Place, New York City, U. S. A. 

 r.ritish patent No. 149,982. 



Rubber Sponges Are Formed so as to Have Large and Small 

 pores in different parts of the sponge, either by vulcanizing to- 

 gether superimposed layers of two different compounds which 

 will yield on vulcanization portions having large and small pores, 

 or layers of the same compound, one part of which has been 

 masticated more than the other. A compound which yields small 

 pores consists of Para rubber, milk of sulphur, lithopone, crim- 

 son sulphide of antimony, or vermilion ceresin wax, pine oil, 

 together with ammonium carbonate or amyl acetate. In a com- 

 pciund fur yielding large pores, larger proportions of ammonium 

 carbonate or amyl acetate are used. Precipitated chalk and zinc 

 oxide are used in place of lithopone, and turjientine may par- 

 tially replace pine oil. — G. \\'. Beldam, Boston Lodge, Windmill 

 Road, Kaling. London, and A. U B. Ryall, Glamorgan House. 

 Brentford. Middlesex, England. British patent No. 151.084. 



A Composition for Use Inside a Pneumatic Tire to Render 

 it self-sealing when punctured, consists of flakes of pliable mate- 

 rial, such as mica, rubber, waterproofed fabric, paper, etc., mixed 

 with a paste made from finely ground china clay, silica, chalk, 

 alumina, etc.. and water or other liquid, such as treacle or a 

 solution of ahic or gum. — W. M. Brothers, Clifton Lane, Rudding- 

 ton, Nottinghamshire, England. British patent No. 151,499. 



Anti-corrosive composition which may be used to impreg- 

 nate a cement or concrete layer to form a damp-proof course, 

 consists of asphalt dissolved in a volatile solvent, such as benzol 

 or petrol, metallic oleates or stearatcs of calcium, and addition 

 of crude rubber, gutta percha and mineral filling materials. — 

 C. H. Ivinson, 72 Coombe Lane, W'imbledcin. and G. S. Roberts. 

 74 Earl's Court Road, both in London. British patent No. 151,666. 



THE DOMINION OF CANADA 



W.\T1-.R1 R.IOFF.D FaBKIc- AMI \'rl.CA NIZED .^RTICI.E — Wll.I.IAM 



Beach Pratt. Wellesley. Massachusetts, U. S. .'\. Canadian pat- 

 ents N'os 206,483 and 206,484. These relate to the same subject 

 matter (Toron) as United States patents Nos. 1,349,909-1,349,914, 

 inclusive. See The Inkia Rihuer Wori.h. LXIII, No. 1, 29-30. 



Coated Product Comprising a Backing of Woven Fabric 

 already provided with a pyroxylin coating and on top of this a 

 coating containing pyroxylin and an adhesive adapted to become 

 adherent upon the application of water. — The Canadian Fabri- 

 koid. Limited, Montreal, Quebec, Canada; assignee of the Du 

 Pont Fabrikoid Co., Wilmington, Delaware, assignee of liarry 

 J. Hoan, Newburgh, New York, both in U. S. A. Canadian 

 patent No. 206,524. 



Bai r.ooN I"'abric, Made of Two Plies of Suitable Thin Tex- 

 tile materials united by an intermediate gas-tight layer of bird- 

 lime which has been thiimed by heating to about 180 degrees F. 

 and mixing gradually therewith alcohol and to which a solution 

 of perchloride of mercury in water has been added in the pro- 

 portion of one-tenth per cent by weight of bird-lime before 

 thinning. — Charles Angus Cleghorn, Brackenside, Woburn Sands, 

 County Bedford, England. Canadian patent No. 206,614. 



Tire 1'"illing Composition, Consisting of Celluloid, Eight 

 ounces ; shellac, four ounces ; rosin, two ounces ; ether, two ounces, 

 and alcohol, 20 ounces. — Albert F. French and William I. French, 

 assignee of a half interest, both of Detroit, Michigan, U. S. A. 

 Canadian patent No. 206,795. 



Leathfr Substitute, Consisting of iMPRECNATifJc a FiBROtJs 

 material with a mixture of gas tar and linseed oil varnish, 

 drying the impregnated material at 100 to 110 degrees C. to 

 evajjorate the benzol, followed by a period of aging. — :\nhydat 

 Leder Werke, A. G., assignee of Kurt Haring, Ijoth of Hersfeld, 

 Germany. Canadian patent No. 206,809. 



GERMANY 



RunnER, GuTTA Percha, Balata, Etc, Are Improved as to 

 llieir plasticity and adhesiveness by being heated with a rubber 

 solvent, such as petroleum naphtha or benzene, phenol, aniline 

 or their homologs, the solvent being subsequently removed. The 

 products are easily soluble, plastic, adhesive and capable of ab- 

 sorbing the usual compounding ingredients. — Ungarische Gum- 

 miwaren-falirik. \. G. German patent No. 323.732. 



N"^- 



.U 1,334 

 331.943 

 332. 30S 



332.347 



OTHER CHEMICAL PATENTS 



GERMANY 



PATENTS ISSUED, WITH DATES OF ISSUE 



'0.'/41 ( 1-ebriuiry J/, lOls.) Method for the prevention of oxida- 

 ticn nf pynthetic ml. her products. Badische Aniline-und Soda- 

 fabrik, LudwiKshaft-n. 



(Dtcemher 6. 1917.) Mt-lhnd for making solutions of high 

 viscosity out of such artificial rubbers as do not dissolve 

 readily in ordinary solvents or whose solutions are not viscous 

 enouRh. Accuniulatorenfabrik Akt. Ges., Berlin. 



(Februarv 15, 1918.) Method for making rubber-like masses. 

 Graf Triedrich de la Rosee, Oarniisch-Partenkirchen. 



(Dtcemher 29. 1917.) Method for makinp a substitute for hard 

 rubber. Khrlich Gabriel. Frankfurterstrasse 2, Sicgen i. w. 



(March 28, 1918.) Method for the prevention of oxidation of 

 synthetic rubber products. Badische Anilin-und Soda-Fabrik, 

 I-udwigshafcn. 



(January 16. 1919.) Method for increasing the elasticity o£ 

 synthetic or natural rubber. Farbenfabriken formerly Fried- 

 rich Bayer & Co., LeverkiiseTi. 



LABORATORY APPARATUS 

 laboratory ventilation 



Lahoratory ventilation, especially that of laboratory hoods, is 

 as important as it is difficult. The use of metal pipes for 

 ducts has until recently not proved satisfactoi"y owing to their 

 rapid corrosion. Tile pipes, while not subject to corrosion, are 

 dil'licult to erect and connect, and are liable In breakage and always 

 unsightly. 



.MI these difficulties seem to be overcome by the use of special 

 ducts consisting of a combination of sheet iron, with a basic pro- 

 tection coating of asphalt and treated on the inside with a special 

 acid-resisting paint. 



"Crude Ri'Bber and Compounding Ingredients" should be in 

 the library of every progressive rubber man. 



