US2481523A - Building materials of high elasticity - Google Patents

Description

Patented Sept. 13, 1949 BUILDING MATERIALS OF HIGH ELASTICITY Charles Mack, Sarnia, Ontario, Canada, assignor to Standard Oil Development Company, a corporation of Delaware No Drawing. Application October 9, 1946, Serial No. 702,091

1 Claim. 1

This invention relates to improvements in the production of building material especially building materials of high elasticity that may be used in the preparation of sheets, boards or shingles of any desired thickness, size or shape.

Shingles or sheets used as weather proof coverings are generally prepared by saturating a base of fibrous material with a binder and applying thereto a coating of plastic or mastic material at an elevated temperature to make the covering waterproof and as a Wearing surface coating, adding such material as powdered slate, granulated mineral aggregate or other hard weather-impervious ingredients. The application of heat is generally required both in applying the bituminous material to the pre-saturated fibrous material and also when adding the mineral material to make the wearing surface more impervious to the weather. The shingles or sheets, when finally prepared, are either stiff and friable or soft and plastic. It is very desirable to prepare shingles or sheets that are elastic and readily regain their shape or form after being distorted by pressure when the pressure is released. Another undesirable feature is the effect of temperature on the physical properties of the shingles or sheets.

Building materials such as shingles, floor cov erings or sound-absorption boards which are flexible, highly elastic and resistant to the infiuence of temperature are prepared by combining fibrous material with a blend of an aluminum soap and a plasticizer.

The aluminum soap consists of the aluminum salt of naphthenic acids or of a fatty acid. The plasticizer which is added to improve the elasticity of the aluminum soap consists of residual mineral oils or refined mineral oils, refined cylinder oils of 180-3000 Saybolt Universal viscosity at 210 F., reduced crude oil of 180-3000 Saybolt Universal viscosity at 210 F., reduced or oxidizm asphalts of any softening point, linseed, rapeseed, cottonseed or tung oil, lard and fish oils, linear hydrocarbon polymers of molecular weight 5,000 to 20,000 or other substances having similar properties. The amount of plasticizer used is -100% based on the aluminum soap.

The mixture of aluminum soap and plasticizer can be prepared by fusing the ingredients together or as follows:

The naphthenic or fatty acids are mixed with the plasticizer, and the mixture is emulsified with water containing enough alkali to neutralize the acids. An aqueous solution of an inorganic aluminum salt such as aluminum chloride, sulfate or nitrate, is then mixed with the emulsion, and

the resulting blend of aluminum soap and plasticizer is separated from the water, washed and dried.

The properties of such products are as follows:

50% aluminum naphthenate, 50% residual mineral oil (180 seconds Saybolt Universal at 210 Softening point (ring and ball) F 160 Penetration gms. 5 sec. at 77 F. 160 Penetration 100 gms. 5 sec. at 32 F 50% aluminum soap from cod oil, 50% asphalt of 95 F. softening point:

Softening point (ring and ball) 195 Penetration 100 gms. 5 sec. at 77 F. 60 Penetration 100 gms. 5 sec. at 32 F 32 The building materials can be produced by saturating roofing felt or similar fibrous materials with 10 to 90% of a blend of aluminum soap and an organic plasticizer, or they can be produced in situ as follows:

Wood pulp, paper pulp, cotton or other fibrous materials or their mixture are dispersed in an emulsion prepared from the fatty acid, plasticizer and lye as described above. After coagulation with a sufiicient quantity of aluminum sulphate solution, the resulting mixture of fibers, aluminum soap and plasticizer is fed through the rollers of a paper machine to squeeze out the water. Finally the resulting sheet is dried between hot rollers.

I claim:

A flexible and elastic building composition consisting essentially of a fibrous material bonded with a blend having a softening point of at least F. and composed of aluminum naphthenate and asphalt.

CHARLES MACK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,958,202 Novak s May 8, 1934 2,235,507 Strauch Mar. 18, 1941 2,252,169 Cullison Aug. 12, 1941 FOREIGN PATENTS Number Country Date 844,806 France Aug. 2, 1939 OTHER REFERENCES Ser. No. 263,577, Vulliet Durand (A. P. C.) pub.

May 11, 1943.