US2455709A - Battery box asphalt and method of making the same - Google Patents

Description

Patented Dec. 7, 1948 other; molcled articles which have tux-meet -requirements for mechanical strength.

Battery boxes =for automobiles and :similar articles have beenfmanufactured by moldingdiot "mixtures of asphalts iine fillers and 'fibroustmaterials The following composition may be considered --typical fIO l ba'ttcry;- boxes- Per cent Asphalt blend 52 Cotton'Fibres Up to now, it has been the generahpractice in the industry wto sblend appreciable proportions of Gilsonite with blown asphalts in order to make a box jhaving both toughness and hardnessyas well as good mold-ability "and improved {appearance'. Thefusual asphalt-Gilso'n ite bleii itafills as nuclras 30-40% *offGilspnite, a natural .iasphalt foff'limite'd availability and highjicost. "Such practiceis reflected inTUfS. Patent 1,752,917

to A. R. Lukens, assignor to the Richardson Compoundih i 1 "BATTERY Boner-mm Ann METHOD or MAKINGTH-E SAME.

- Walla-cc spaaousesasviiinsl Bocnau,Long Island City, N."Y., assignors to- Socony-VacuflmDfl Company, cor orationnfliew York pany. To the best of our knowledge, no asphalt of purely petroleum origin has met the requirements of cohesion and mechanical characteristics necessary in the battery boxes.

We have found that oxidation of solvent extract tars from residual petroleum oils, such as Duo- Sol tar, to a blown bituminous material having a ring and ball softening point in the neighborhood of 250-300" F., preferably 275-285 F., yields products of unique characteristics. Such products are capable of replacing the Gilsonite-asphalt blends and even surpassing them in quality.

A plant sized batch of Duo-Sol tar having the following physical tests was blown with air at 400 to 500 F.

Specific gravity 77/77 F. 1.012 Softening point (R. & B.) F 90 Flash, COC F 500 Viscosity furol 210 F -seconds 323 Penetration 32 F., 200 gr, 60 sec 52 The properties of the resulting product were as follows:-

Softening point (R. & B.) F 279 Penetration 77 F., 100 gr., 5 sec 2 Penetration 60 115 F., 50 gr., 5 sec. 2 /2 Penetration 150 F., 50 gr., 5 sec 9 Experimental production results from a battery box manufacturer on the above described new asphaltic material, in comparison with two Gilsonite-asphalt blends, are given below. Storage i'l ests .on Battery; Boxes:

Incorporated, a

battery boxes were all made inQthe same manner, s the e pr ti ns: qf bi um epvs tte b r and 1 6 7410 va et er fi -i m dii? We lirindofgasphaltused. A .1

5 castration 150/50/5 at1on,per. ens 10 Product. H 03051; Piece/Impact a; mai s nd souli nqt ma i r li ll .nthis e sp W :no fi son i e i *blend with m tro" S.P. Venezuelan asphalt,it was still harder to mold. It will be noted that the box made with 100% blown Duo-Sol tar has a better tensile strength, better impact resistance, and equal elongation, compared with the blend containing 40% Gilsonite. No difliculty in molding was observed.

The test procedures used in obtaining characteristics of the battery boxes are those described in the ASTM Standards for 1942, part III, p. 1405, Testsrfor asphalt battery containers (D639-41T) and p. 1389, Tests for hard rubber products (D530-39T).

The Duo-Sol tar is an asphaltic extract obtained by solvent refining of reduced crudes with liquid propane and cresylic acid. Other extracts obtained similarly from residual petroleum oils by solvent refining with propane, phenol, clorex and other selective solvents known to the art are suitable for the purpose of this invention provided the extract as such, or after reduction by topping prior to'air blowing, conforms to the following approximate characteristics:

Softening point (R. & B.) -JF. min Specific gravity 77/77 F min 1.00 Penetration 32 F., 200 gr., 60 sec. 20 to 150 Viscosity furol 210 F. secs. to 750 V. G. C. min .890

The desirable properties of the oxidized asphalt suitable for direct compounding with the fillers 3 into the battery box material should be within the following limits:

Specific gravity 77/77 F -min.... 1.03 Softening point (B. 8: B.) ....F 250-300 Penetration 77 F., 100 gr., 5 sec. to; Penetration 115 F., 50 gr., sec 1 to 6" Penetration 150 F., 50 gr., 5 sec 5m 16 AS Pointed out hereinbefore, the preferred form of the product is one which has been blown to a.

ring and ball softening point of 275 to 285 F.

We claim: 1. That method of making an asphalt suitable for use, together with filler and fibre, in the production of molded battery boxes which comprises the following steps: solvent refining a reduced crude to produce therefrom a solvent extract tar,

reducing said tar by distillation to a material of the following properties:

Softening point (R. a B.) F. min

and then oxidizing the reduced tar to an asphalt having the following properties:

Specific gravity 77/77 F min 1.00

' Penetration 32 F., 200 gr., 60 sec 20 to 150 Viscosity furol 210 F. secs 100 to 750 V. G. C min .890

y 2. That method of making'jan asphalt-suitable for use, together with filler and fibre, in-theprqr duction of molded battery boxes which comprises l the following steps: solvent refining crude to produce therefrom a solvent extract tar, reducing said tar by distillation to ing propertiesz' Softening point (R. & B.) F. min- Specific gravity 77/77 F ..min

a material of the follow- 1 Penetration 32 F., 200 gr., 60 sec 20 to 150 Viscosity furol 210 F. secs 100 to 750' v. G. c ---min .890

and then oxidizing the reduced tar to an asphalt having the following properties:

Specific gravity 77/77F min 1.03 Softening point (R. 8: B.) 1 F 275-285 Penetration 77 F., 100 gr., 5 sec 0 to 4 Penetration 115 F., gr., 5 sec 1 to 6 Penetration 150 F., 50 gr., 5 sec 5 to 16 3. An asphaltic material, suitable for the making of molded battery boxes when blended only with fibre and filler,'having the following properties:.

Specific gravity 77/77 F min 1.03 v Softening point (R. 81 B.) F 250-300 Penetration @77" F., gr., 5 sec 0 to 4 Penetration F., 50 gr., 5 sec 1 to 6 Penetration F., 50 gr., 5 sec 5 to 16 ,4. An asphaltic material, suitable for the mak- "mg of molded battery boxes when blended only with fibre and filler, having the following properties:

Specific gravity 77/77 F min.- 1.03 Softening point (R. 8: B.) F 275-285 Penetration 77 F., 100 gr., 5 sec 0 to4 Penetration 115 F., 50 gr., 5 sec '1 to 6 Penetration 150 F., 50 gr., 5 sec 5 to 16 WALLACE E. SPELSHOUSE. ARTHUR H. BOENAU.

REFERENCES CITED.

The following references are of recordin the file of this patent:

UNITED STATES PATENTS Date Number Name 2,068,845 Collins Jan. 26, 1937 2,073,088 Anderson et' a1 Mar. 9, 1937 2,144,694 Smith v Jan. 24, 1939 2,201,466 Anderson May-21, 1940 2,223,776 Anderson Dec. 3, 1940