US1838074A - Container and material therefor - Google Patents

Description

Patented n... 22, 1931 warren STATES PATENT OFFICE EORTIMER T. HARVEY, OF NEWARK, NEW JERSEY, ASSIGNOR TO THE HARVEL 003- I PORATION, E NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY ooN'rAmna-Ann Merriam:- THEREFOR No Drawing. Original application filed October 1, i927, Serial No. 228,481. Divided and this application filed October 21, 1927. Serial No. 227,862.

c The present invention relates to ontainers and to material for containers with which are I associated a coating or an impregnation of a material made rom the oil or liquidfwhich occurs inthe ce lular outer shell or husk of the cashew nut and to method of producing these products; Containers havmgsuch a coating thereon or impregnated therelnto are particularly useful for holding and transto porting foodstufl's because this material is so on, and the materials and the containers so description of new and useful containers and.

made according to the invention are useful in the arts generally.

Various objects and advantages of the 1nvention will be obvious from the following container material embodyin the invention; and the invention consists o the containers and container material set forth in the claims.

The material for coating the containers of the invention and for impregnatin the same or others thereof is made by treating the oil or liquid from the husk of the cashew nut to make it insoluble when dried and also to make it presentable either by itself or by means of a carrier vehicle or by a solvent to apply it to a material to be coated or impregnated or both as by flowing or dipping or brushing or other suitable methods or means.

The methods of making the oil insoluble are set forth in various copendin applications but two suitableexamples W1 1 be cited here to make the present invention practicable. One method is to heat the huskoil of the cashew nut in contact with copper metal at a temperature of about 200C. for aboutforty-five minutes at normal pressure. The resultant material is a liquid which itself can be ap lied to a. surface by some of the methods a ove cited. Trhis resultant liquid can also be taken up with a solvent such as kerosene, naphtha,-benzine or the like. In. either case, Whether applied by itself -or by a solvent or other vehicle the reaction product, after removing the vehicle in cases where used, will dry to a tough, resilient or flexible body This is d'esirable for example when the,

cashew shell oil is limited in quantity and linseed oil not so limited. The product involving linseed oil has many of the desirable characteristics of the product of the cashew .shell oil alone although in some cases not to the same degree. These coating materials as well as the others herein noted are among other uses notably suited for lining bottle caps and caps for other containers, for example, for mustard and pickle bottles for cardoard ice cream containers, and caps on metal bottles for containing ether. The characteristics which make these products suitable for the particular purposes above noted are insolub1lity,-freedom from taste and smell and proof against dampness and absorption of water.

Another method of producing coating and impregnating material for containers is substantially' as follows. The cashew nut shell oil is heated with about 10% of its weight of nitric acid sp. gr. 1.40 for about thirty minutes at a tem erature of about240 C. The reaction pro not is washed to free it of acid and is taken u with a vehicle such as kerosene. The application of this form is by dipping, brushing, or spraying as with the others. I

The materials for making containers for which the above described reaction products of cashew nut husk oil are any of the materials heretofore used such as paper, cardor film. A suitable temperature for cases for very much less lining the board, wood, gelatines, cellulose acetate and the like, metal and other material some not heretofore used because of unsuitability on accountof porousness, absorption of moisture, and other reasons. The material named can be rendered gas tight by a coating of one of" the reaction products named.

These products can be used also for water proofing or moisture proofing wood, paper,

glacine paper, cellulose products and so on.

can be utilized for bringing the cashew oilinto a condition in which it will dry as for example according to the copper reaction above described. In the making containers either orboth theinside and the outside surface,of the container is or are provided with the coating described. Also the material for the container is coated either before or after the container is made thereof.

A still further method of makingcontainers or container material is to produce a thin coating of copper on sheet iron as by immersing the sheet iron in a copper sulphate bath until the iron becomes coated with the cop per, or by electrolytic deposition with elecis then utilized to catalyse a reaction of cashew nut shell liquid brought in contact thereover. In making metal containers or in making the material therefor a coating of cashew nut shell liquid varnish can be obtained by immersing the material of the container itself in the shell liquid which is at a temperature of about 200 C. for

about forty-five minutes after which the 'immersed and treated material is withing or impregnating material is toheat it.

drawn from the bath and properly drained to secure an even coating of the treated liquid thereover. Further heating at from 100 to 150 C. or more is then used to set the resultant coating on the'surface.

,A still further method of reparing the cashew nut shell liquid for m ing the coatup to about 600 F. and then allow it to cool. Dryers such as litharge, or manganese dioxide,"or copper oleate, or mixtures of these, or other driers, can be-added at suitable temperatures; 450 F. is a practical temperature for adding the driers. .The treated liquid, with or without the drier, can be applied with or without a solvent as a coating or, impregnation and dried at say about 100 to 125 C. for examples. Also linseed oil, China wood oil, gums, or resins or mixtures of these can be added to the cashew nut shell liquid before or after or part before and part" after the treatment of the jcashew liquid and in these cases the drier'can be used. or not, to secure different results.

Although I have set forth and described various methods-and processes for produc ng my new products, it is obvious that various changes may be made in the methods or processes or in the various steps thereof without changing or modifying the essential features and characteristics of the products produced and that such products remain substantially with the same desirable characteristics although modifications may be made in the appearance, texture and in the physical and chemical characteristics.

As to certain features claimed in the present application, the present application constitutes a divislon of my copending ap- 2. A- container having a wall of fibrous material which has on the surface thereof a coating which has modified cashew nut shell liquid as the base thereof.

3. A web of fibrous material which has 0d the surface thereof and is impregnated with thereof. trodes. The copper coating .on .the .lIOIl a material which has modified cashew nut shell liquid as the base thereof.

4. A container having a wall of fibrous material which has on the surface thereof and is impregnated with a material which i has modified cashew nut shell liquid as the base thereof.

5. A container having a wall of fibrous material which has on its inner surfacev a coating which has modified cashew nut shell liquid as the base thereof.

6.'A container having a wall of fibrous material which is impregnated with and is coated on its inner surface with a material which has modified cashew nut shell liquid as the base thereof.

7. A container having a wall of fibrous material which is impregnated with and is coated on its inner and outer surfaces with a material which has modified cashew nut shell liquid as the base thereof.

8. Cardboard which has on the surface thereof acoatingwhich has modified cashew nut shell-liquid asthe base thereof.

9. Cardboard which has on the surface thereof and is impregnated with a material which has modified cashew nut shell liquid as the base thereof.

10. A container having a wall of cardboard whichhas on the'surface thereof a coating Patents Nos. 1,725,791;

which has modified cashew nut shell liquid as the base thereof.

11. A container having a wall of cardboard which has on the surface thereof and is im pregnated with a material which has modified cashew nut shell liquid as the base thereof.

12. A web of cellulose material having on.

the surface thereof a coating which has modified cashew nut shell liquid as the base thereof.

13.v A container having a wall of cellulose material which is coated with and is impregnated with a material which. has modified cashew nut shell liquid as the base there-' 14. A web of fibrous material which has on the surface thereof and is im regnated" with cashew nut shell liquid mo ed to a dry state.

15. A web of cardboard which has on the" surface thereof and is impregnated with.

cashew nut shell liquid modified to a dry state.

16. A web of fibrous material impregnated with cashew nut shell liquid modified to a dry state.

17. A web of cardboard impregnated with cashew nut shell liquid modified to a dry state.

18. A web of fibrous material having between the fibers thereof cashew nut shell liquid modified to a d state.

19. A container whie has a coating on the surface thereof of modified cashew nut shell liquid. I

20. A container having on the wall thereof a coating which is a varnish made from cashew nutshell liquid.

21. A container. having on the surface thereof a coating of modified cashew nut shell liquid which'is resistant to the actioir of food juices.

In testimony, that I claim the invention set forth above I have hereunto set my hand this 28th day of September, 1927.

4 MORTIMER T. HARVEY.