US2325167A - Antioxidizing paraffin composition - Google Patents

Description

uicnied July 27, 1943 Herbert G. Wore.

coosrrron .iachson metallic, N. Y, assimor to ell-icon Seal-Map ilorpomtion oi Dela were, Wiiminyton, list, a corporation oi Dei- No Drawing. Application March to, litdii,

Serial No. litdd'rtt i illlaimu. (i311. Mid-Wit) This invention relates to anti-oxidants for parwesres and oils and has tor an object to prevent parafin compositions from oxidizing, dis= coloring or developing an objectionable odor.

another object is to provide an anti-oxidant or the above type havins novel and improved characteristics.

Another object is to provide an anti-oxidant oi the type above indicated which is efiective in en tn mely small percentages.

in'iother object is to provide an anti-oxidant which is suited to commercial use in connection with was baths used, for example, for paper treatment or the like.

Various other objects and advantages will be apparent as the nature oi the invention is more iulw disclosed.

Although the novel feature which are believed to be characteristic oi this invention are pointed out more particularly in the claims appended hereto, the nature oi 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 detail or the invention. These terms, however, are to be given as broad an interpretation as the state oi the art will permit.

it has been found that-baths oi paramn was 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 or the parafdn, particularly after long continued use at elevated temperatures. I have discovered that certain other substances, even when present in minute quantitles in a bath or paraiiin waxes or parafin oils,

have the property or preventing such oxidation and permit the bath to be used commercially for long periods or time without fouling. 1

The invention is particularly applicable to parait'ui wax baths to be used for impregnating or percent of crude mcntan wax is suited to prevent oxidation or a paraflin wax bath when the bath is operated at the above temperature. In fact, this percentage has been found satisfactory for a bath maintained in an atmosphere oi oxygen at a temperature as high as 2% F. during a seven hour test period. The percentage required for a bath that is used at a lower temperature is even less. For example, about .02 percent is sufdcient ii the bath is maintained at a temperature of from 16il F". to 210 F. It is to be understood that the percentace oi anti-oindant required increases in accordance with the temperature oi the bath and at the higher temperatures the increase is much more rapid.

in addition to the above named anti-oxidant, it has been found that about .6 percent of ceresin breaks down the crystalline structure of the parafidn and tends to maize the were harder and more water resistant. A bath of parafdn was of the type melting between 133 F. and 138 Ft, containing about .i'i percent ceresin and about .04 percent crude montan war: is particularly suited to the paper treating process set forth in the Baum patent above mentioned. This composition possesses the necessary hardness and waterresistance 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 crude montan was does not introduce any objectionable discoloration.

While crude montan has been found particu larly satisfactory for the above purpose because of the extremely small quantities which may be used, various other waxes and bituminous materials have also been found to possess anti-oridant properties in varying degrees, as set forth in the following table:

Approximate er Approximate per cent reguire dto cent required to preven 0x1 2- revent oxidaantl-oxidant materiel tion in an indust iQu in an industrial parefdn trial parafiin bath at 230 F. bath at 160 F.- 240" F. 210 )3.

Crude moutou wax." 04 .02 Ozokeritc (crude) 1 .05 California asphalt. 2 1 (lamaubawax. .6 .3 Candelilla wax 6 2 Esparto wax 8 4 It is to be understood that the above examples are representative only and that various other waxes and bituminous materials such as tars, pitches and the like having similar properties may be used.

It is also 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 iorth. 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 oi paper comprising a paraflln wax having incorporated therein about .02 to .04 percent of montan wax.

2. A wax composition for the treatment or paper comprising a paraflin wax having incorporated therein about .02 to .04 percent 01 montan wax and about .6 percent ceresin.

3. The method of preventing oxidation 0! molten paraflin wax baths and hot paraflin oil baths which comprises maintaining in the bath about .02% to .04% or montan wax while operating the bath at elevated temperatures of not over about 2942 F. and under conditions such that oxidation would otherwise take place.

4. The method of preventing oxidation 01 molten paraflin wax baths and hot paraflin oil baths which comprises maintaining in the bath about .02 percent to about .8 percent of a substance selected from the group consisting of montan wax, carnauba wax, candeliila wax, esparto wax and ozokerite.

HERBERT G. VORE.