Патент USA US2122543код для вставки
Patented .Iuly 5,‘ 2,122,543 UNI-Tao- STATES PATENT ‘OFFICE CONTAINER cosmos William vJ. Tomsioek, St. Paul, Minn, Lloyd L. Dodge, Rhinelander, Wis., and Jose ‘B. Calva, St. Paul, Minn” assignors, by direct and mesne assignments, to Dodge Chemical and Manufac turing Company, Chicago, Ill., a corporation of Delaware No Drawing. Application August 15, 1934, ' ‘ Serial No. 739,925 > .. (c1. air-es) 3 Claims. Our invention relates to‘ an improvement in By resins, we mean natural substances such as v container coatings, and is particularly designed gum thus, copal, dammar, kauri, mastic and to preserve metallic and wooden containers and other similar substances; and synthetic sub-" ' to avoid the contamination of stored liquids by stances such as ester gum, chlorinated-aromatic , the inner surface of the container. _ , It, is‘ common practice to employ pitch as ‘a hydrocarbons such as chlorinated biphenyl, poly coating for kegs and vessels used for the storage of liquids, particularly in the brewing industry. modified by fatty-acids and mixed with rosin ‘ties .to .injure the liquid stored in‘ the container.' ents 254,111; 269,659; 281,939; 289,968, and merized turpenes, ' phenol-‘formaldehyde resins and rosin derivatives such as ester gum, the This pitch may comprise anything from rosinv to . glyceride of abietic acid such as the Amberols, 10 asphalt. This pitch coating is undesirable for a the Albertols, Bakesite, Paranol, which are trade 10 plurality of reasons.‘ It often contains impuri-' names of substances described in German Pat Pitch often chips or cracks oil’, exposing the con- ' 438,371, and resinous and waxy metallic sub tainer surface. Furthermore, the high tempera ' stances such as the metallic derivatives of organic 15 tures necessary'in the application of this pitch acids such as abietic, stearic and the like. ‘ 16 . often injurethe chemical structure of the coat By waxes, we mean natural waxes such ‘as mg. wax, beeswax, ceresin,.and synthetic waxes _ Our coating has the advantages of better ad 'Japan such as Rilan wax, and waxy substances such as he'sion to the container, thus greatly diminishing the chances of having the coating separate from the container surface, exposing this container stearyl alcohol, stearic acid and similar sub stances; These waxes are soft with relation to 20. carnauba wax and provide a pliable coating. surface to the liquid stored._ ‘Our coating is‘ de signed to adhere more ?rmly than‘ the usual pitch coating to both wood and metal surfaces. By hydrocarbons, we mean substances such as petrolatum, and the like. The'general formula and the usual limits of the Our coating has higher moisture-proofing qual 25 ingredients used therein have been stated. A 25 ities than the’usual pitch-coating,v thus_ obviating . speci?c example of a formula containing the neo the danger. of ‘having the stored liquid work ' ingredients in the desired amounts would through the coating into contact with the surface essary be as follows: of the container. Moreover, our coating is pro 30 Container coating: Ester-gum vided greater plasticity, thus virtually obviating any chipping or cracking of the coating. As a result, once a container is coated it is virtually . , ' It is also va feature of our coating that lower temperatures are required to melt the coating, thereby-avoiding excessive heating of the compo— sition, which is apt to produce a chemical crack ing and give rise to water soluble products which will contaminate aqueous solutions such as beer. It is an added feature of our invention that no solvent is required to evaporate; Our coating is applied by means of a standard keg coating equipment, or by spraying or painting. The coat- ing is thus particularly adapted for use in'coating Japan wax and petrolatum are natural prod- ' purpose. The coating of our invention consists in mix ‘ tures of resinous substances. waxy substances, and suitable hydrocarbons to obtain the desired , ,- I r ; , for coating containers, and while we have en-‘ deavored to set‘ forth the best embodiment thereof; we desire'to have it understood that the formula may be changed within the scope of the following claims without departing from the spirit ‘ I ' ' Per cent Resins _..Waxes 41 to 99 ' _ I Hydrocarbons -ss ........ ..--.' ..... -.'-.. ' lto 59 1 to 59 ' In accordance with the patent statutes, we _ have described the principles of our composition In- general, our formula is as follows: > 11 24 ucts, and need no de?nition. Ester gum is the 35 glyceryl ester of abietic acid. The speci?c formula given is merely an exam ple ofone formula which could be used, and is not given as the only mixture which would make a proper coating, as is believed clear from the general formula and the citation of numerous resins, waxes and hydrocarbons which are illus . trative of materials ‘which could be used for the wooden’ or steel kegs used in the brewing industry. I results. 65 30 Japan wax _________________________ .._ . Petrolatum 1 impossible for stored liquid to contact the surface of the container. Per cent of the invention. ' ' We claim: ' , ' - . . 1. In combination with a base, a coating com - amaua ‘ priaingvsubstantialiy ester g’um 55%,‘ Japan wax 11%, and petrolatum 24%. ' 2. In combination a base and a. coating there tor, comprising substantially ester _ cereain 11%, and petrolatum 24%. wmnu J. ToMsmEK. for, said coating comprising substantially eater 5 gum 65%, wax 11%, and pet11oiatum_24%. 8. In combination with a base a coating there 65%. ' - . LLOYD L. DODGE. JOSE B. can.