US2325085A

US2325085A - Antioxidizing paraffin composition

Info

Publication number: US2325085A
Application number: US378973A
Authority: US
Inventors: Herbert G Vore
Original assignee: American Seal Kap Corp of Delaware
Current assignee: American Seal Kap Corp of Delaware
Priority date: 1941-02-14
Filing date: 1941-02-14
Publication date: 1943-07-27
Anticipated expiration: 1960-07-27

Description

Patented July 27, 1943 2,325,085 ANTIOXIDIZING PARAFFIN COWOSITION Herbert G. Vore, Jackson to American Seal-Kap Corporation of Delaware,

Wilmington,

Heights, N. Y., assignm- Del., a. corporation of Delaware No Drawing. Application February 14, 1941, Serial No. 378,973

9 Claims.

This invention relates to anti-oxidants for paraffin waxes and oils and has for an object to prevent paraflin compositions from oxidizing, discoloring or developing an objectionable odor.

Another object is to provide an anti-oxidant of the above type having novel and improved charmy copending application 326,622, filed March 29, 1946, for Anti-oxidizing parafin composition. Although the novel features which are believed to be characteristic of this invention are pointed out more particularly in the claims appended hereto, the nature of the invention will be better understood by referring to the following description in which certain specific embodiments thereof have been set forth for purposes of illustration.

In the following description and in the claims certain specific terms have been used for convenience in referring to various details of the invention. These terms, however, are to be given as broad an interpretation as the state of the art will permit.

It has been found that baths of paraffin wax such, for example, as those used commercially for water-proofing, sizing or impregnating paper, tend to foul and to cause discoloration or undesirable odors due to oxidation of the paraffin, particularly after long continued use at elevated temperatures. I have discovered that certain other substances, even when present in minute quantities in a bath of parafiin waxes or paraflin oils, have the property of preventing such oxidation and permit the bath to be used commercially for long periods of time without fouling.

The invention is particularl applicable to paraffin wax baths to be used for impregnating or treating paper for the formation of bottle caps in accordance with the process set forth in the Baum Patent 1,668,349. In that, process it is necessary to maintain a bath of wax at a temperature of, for example, 235 F. to 240 F. for indefinite periods of time. As operated commercially, the bath is maintained continuously at this 66 temperature, new wax being added toreplace wax which is used up in the process.

In accordance with the present invention, I have found that natural and artificial asphalts and pitches, and their derivatives and asphaltlike substances, such as gilsonite, manjak and other asphaltites and petroleum residue asphalts, in extremely small percentages are suited to prevent oxidation of a paramn wax bath when the bath is operated at the above temperature. It is to be understood that the percentage of antioxidant required increases in accordance with the temperature of the bath and at the higher temperatures the increase is much more rapid.

The following table gives certain examples of such anti-oxidants:

Approximate per approximate per cent retqui rgdtto cent riquirgdtto preven on a 1011 preven on a 1011 Ann oxidant mammal in an industrial in an industrial paraflin bath at paraffin bath at 230 F.240 F. F.-2l0 F.

Per cent Per cent Egyptian asphalt .02 .01 Cuban gilsonlte .04 02 Petroleum residue asphalt (Ennjay 006 .003 Isthmian asphalt .02 01 anjak 02 01 Utah gilsomte 02 .01 Fatty acid pitch 50 25 Cottonseed pitch 10 05 Stearine pitch 50 25 It is to be understood that the above examples are representative only and that various other bituminous materials having similar properties maybe used.

In addition to the above named anti-oxidants, it has been found that about .6 percent of ceresin breaks down the crystalline structure of the paraffin and tends to make the wax harder and more water resistant. A bath of parafin wax of the type melting between 133 F. and 138 F.; containing about .6 percent ceresin and about .04 percent of petroleum residue asphalt is particularly suited to the paper treating process set forth in the Baum patent above mentioned. This composition possesses the necessary hardness and water-resistance to prevent the skirt of the cap from softening or opening up on the bottle due to absorbed water. The bath will not oxidize, foul or develop objectionable odors even after long continued use at elevated temperatures. Furthermore, in the small percentage used the gilsonite or asphalt does not introduce any objectionable discoloration.

It is to be understood that the wax baths above mentioned are suitable for various uses in the paper and allied industries, such as treating, sizing, waterproofing, impregnating, etc., and that the invention is not to be restricted to the particular use above set forth. Various changes and. modifications may be made therein as will be readily apparent to a person skilled in the art. The invention is only to be limited in accordance with the scope of the following claims.

What is claimed is:

1. A wax composition for the treatment of paper comprising a paramn wax having incorporated therein about .003 to .04 percent of petroleum residue asphalt.

2. A wax composition for the treatment of paper comprising a paramn wax having incorporated therein about .02 to .0 percent of gilsonite.

3. A wax composition for the treatment of paper comprising a parafin wax having incorporated therein about .02 to .04 percent of manjak.

4. A wax composition for the treatment of paper comprising a paraflin wax having incorporated therein about .003 to .04 percent of petroleum residue asphalt and a small percentage of ceresin.

5. The method of preventing oxidation of molten paraffin wax baths and hot p'araflin oil baths which comprises maintaining therein about .003% to .04% of a petroleum residue asphalt.

6. The method of preventing oxidation of molten paraflin wax baths and hot paraflin oil baths which comprises maintaining therein about .02% to .04% of gilsonite.

7. The method of preventing oxidation of molten paraflln wax bath and hot paramn oil baths whichcomprises maintaining therein about .02% to .04% of manjak.

8. A wax composition for the treatment of paper comprising a parafiin wax having incorporated therein about .003% to .5% of an antioxidant bituminous material selected from the group consisting of natural asphalt, petroleum residue asphalt, gilsonite, manjak, fatty acid pitch, cottonseed pitch and stearine pitch.

9. The method of preventing oxidation of molten paraifin wax baths and hot paraflin oil baths, which comprises maintaining in the baths about .003% to .5% of an anti-oxidant bituminous material selected from the group consisting of natural asphalt, petroleum residue asphalt, gilsonite, manjak, fatty acid pitch, cottonseed pitch and stearine pitch.

IERBERT G. VORE.