US2185031A - Wax composition - Google Patents

Description

Patented Dec. 26, 1939,

. Frederick H. Macilaren, Calumet City, 111. and

x me 'w d Adams; Hammond;Ind;,assignors" to Standard Oil Company, Chicago, 111.,acorporation' of Indiana No Drawing.

1 Application March 26, I 1937 l .SerialNo.f33,18 2

4 clai s. (or; 1.34%) .1

This invention relates to a new composition of matter and, in particular, to'a new wax composition. 1 a

We have discovered that the addition in small amounts of certain halogenated aromatic hydrocarbons, such asnaphthalene, and in particular, chlorinated naphthalene, to hydrocarbon waxes imparts to the latter certain highly desirable drainedcan is then allowed to cool to room tem- 'perature and'filled with beer, capped, pasteurized at 140F. for 20 minutes and then allowed to cool for 10 minutes at 60 F. The can is then uncapped and' the beer removed. The can is then 5 minutes, the copper sulfate and hydrochloric acid properties. The addition of small amounts of solution removed from the can and the can chlorinated naphthaleneknown commercially sed We With Water. TO determine hOW We l 10 as Ha1owaxto petroleum waxes so modifies the he material adhered to the surface the can is characteristics thereof that the same may be used C tW a d Co e a emoved by more effectively than straight petroleum waxes s ab e v t. p exa ination there must to coat materials suchas metallic containers, 'bejnWwpp showing since a deposit f pp r paper, etc. 7 H3 indicates a break in the coating material. I 15 Metallic containers used for the packagingfof ---*2. The lining material must adhere to a strip foodstufis and beverages are'gene rally fabricated of tin Platesllspendsd in Water at a t pe at with tin plated interiorsto avoid corrosion. It 0i 4 Any material which will not adhere has been found that when certain foodstuffs and t9 the ti e is cons unsuitable as av beer beverages and, in particular, alcoholic beverages, ;Q 'r H op; 1 v 20 such as beer, are packed in tin lined metallic con- The material 0 61 0 0 to 5 F. for 7 tainers inadequate protection is afforded' by the u es m st e a s c t y a l t p tin plated lining. This may be due to the acidic mi b n i g .th same double Without breaking,- condition of the material packed or due. to the h m e i not impart t0 he bee rupture of the lining during the heating, treatany r' t b in in contact with the same 25 mg and/or pasteurizing processes. Various types for a Period: of afweek. of shellacs, lacquers, and wax compositions have W a f davcomposition Comprising been tried in an attempt to overcome thisdiffi- -,l.-Q 5%- H WB X and 85-7 07?) paraflin wax culty with little success. when applied-as a'liner in metallic containers of We have found that mixtur of petroleum the class described will pass the above drastic 30 waxes with Halowax are well suited to line metaltests- The WaX used is preferably One Which D S- lic containers used for packaging foodstuffs or sesses tough. amorphous ac e stics and has beverages, and in particular, to the lining of cans a melting pfl above a out 150 F. We have M used for dispensing beer. With the advent of ound that the amorphous-like wax of about dispensing beer in metallic containers much diffi- 160-1'70 F. melting point obtained by pressing culty has been encountered in providing a liner slack wax separated from a 50 S. A. E. motor oil for the sqntainers which t o i y p otects distillate from crude oils of the Salt Creek type the container against COI'I'OSIOII and which will i particularly adaptable for this purpose. For 40 not impart to the been an undesirable taste and the purpose f identifying the Same, this Wax 40 odor. Under the condltions of pasteurization of will hereinafter be referred to as was A the beer many of the materials used to line the Another type of Wax which may be used is 3 interior of the cans become ruptured and expose trol tum ax bt d b tt th t the metallic surface which then becomes susa w 0 mm as O om m e Se ceptible to corrosion tlmg about a 30% solution of crude petrolatum A suitable material for lining beer cans must base stock at a temperature of about 30'70 F. 45 pass the f ll ing tests; and preferably about F. The petrolatum wax 1. The beer cans at room temperature are filled so obtained has a melting point of about with the material being tested which has been and p es a acteristics which make it heated to 250 F. and the melted material poured adaptable per so as a container liner, particularly 50 from the can by slowly rotating the same. The beer cans, although improved results are obtained 50 when it is used in admixture with Halowax. This wax will hereinafter be referred to as wax B.

We may use wax A and wax B separately or blends of wax A and wax B may be used.

The following compositions by way of examples have been found to be effective as liners in metallic containers:

Suitable liners may be also prepared by the addition of certain condensation products to the mixture of wax and Halowax. Such a condensation product may be prepared by reacting a chlorinated hydrocarbon such as paraffin wax with an aromatic hydrocarbon such as naphthalene in the presence of a catalyst such as aluminum chloride. The product known as Pourex and covered by United States Patents 1,963,918 and 2,057,104 is suitable for this purpose. Pourex treated with concentrated acids, such as concentrated or fuming sulfuric acid, is particularly effective for this purpose.

The following composition has been found suitable.

Per cent Wax A 99.0 Halowax- 0.5 Pourex 0.5

The foregoing compositions have been found effective in providing the interior of metallic containers, such as beer cans, with a well adhering protective coating.

This new composition of petroleum waxes and small amounts of Halowax is well adapted for coating paper and paper -like objects. It possesses the novel 'property, depending upon the amount of Halowax in the mixture, of being more transparent or more opaque than the petroleum waxes alone. We have found that the addition of nm chloride.

Halowax in amounts from 0.25% to 2.0% to paraffin wax renders the wax more transparent while the addition of about 2.0% to 20.0% of Halowax to paraflin wax increases the opacity of the latter. It is apparent that this novel proper-' ty greatly enhances the utility of ordinary parafiin waxes.

While we have described our invention by certain specific embodiments and uses thereof the same are intended to illustrate and not limit the invention, except as defined in the appended claims.

We claim: V

1. A wax composition for protecting the ini terior surfaces of metallic containers comprising ,85 to 99% of a tough amorphous petroleum wax of about 160 to 170 F. melting point and 1 to 15% of Halowax, said petroleum wax being obtained by pressing-slack wax separated from a 50 S. A. E. motor .oil distillate from crude oils of the Salt Creek type.

2. A protective coating for the interior surfaces-of metallic containers comprising to 99% of petrolatum wax having a melting point of about 160 F. and about 1 to 15% of Halowax, said petrolatum wax being obtained as a bottom in settling about a 30% solution of crude petrolatum base stock at a temperature of about 50 F.

3. A protective coating for the interior surfaces of tin plated beerv containers comprising to 99% of a petroleum wax :mixture and 1 to 5% of Halowax, said petroleum wax mixture comprising about 5.0% of a tough amorphous-like wax having a melting point of about to F.,obtained by pressing slack wax separated from a 60 S. A. E. motor oil distillate from crude oils of the Salt Creek type and about 50% of a petrolatum wax having a melting point of about 160 F. obtained as a bottom in settling about a 30% solution of crude petrolatum base stock at a temperature of about 50 F.

4. A' protective coating for the interior surfaces of metallic tin plated containers comprising 99% of a tough amorphous-like petroleum wax having a melting point of about 160 to 170 F.,

said petroleum'wax being obtained by pressing- 0.5% of Halowax and 0.5% of a condensation product obtained by treating chlorinated paraffin wax with naphthalene in the presence of alumi- ELMER WADE :r' FREDERICK H. MACLAREN.