US2027686A - Coating compositions and the process for their production - Google Patents

Description

Patented Jan. l4, 1936 UNITED STATES PATENT GFFHQE COATING COMPOSITEONS AND THE PROC- ESS FOR THEIR PRODUCTION Paul Friedrich, Cologne, Germany, assignor to Trustkantoor Amstelland N. V., Amsterdam,

Netherlands 7 Claims.

The present invention relates to coating compositions and the process for the production thereof, and more particularly to coating compositions for application to metal, stone, sand, Wood, paper, card board and textiles.

According to the invention it is proposed to employ as constituents pf the composition, tar, prepared tar, pit coal tar pitch, petroleum asphalt, aliphatic chloro-hydrocarbons and a mixture of benzene derivatives and benzene homologues, but without the use of pure benzene. The composition is adapted to be employed for coating large and small stones, rough and fine sand, pulverized stone, metal objects of all kinds and sizes from thin wire up to thick rods and plates, paper and cardboard and also textiles, for providing insulating means for brickwork, and when mixed with sand and pressed it can be employed as a substitute for asphalt plates.

It is a particular object of the invention to utilize in a lucrative manner the pitch which constitutes a waste product in the distillation of pit coal and petroleum. The term tar as hereinafter employed is specially intended to denotethe residual product which remains in the still after the light and middle oils and to a certain extent also the anthracene oil have been distilled off from the crude tar. The said tar is thus a product which has in itself a very considerable pitch content.

The process for the production of the new composition according to the invention is characterized in that bituminous hydrocarbons, such as for example, pit coal tar pitch, tar, prepared tar, petroleum asphalt, petroleum pitch are introduced into an autoclave, aliphatic chloro-hydrocarbons, such as, for example, trior tetrachlorethylene, together with a mixture of benzene homologues and derivatives, for example benzene first runnings, solvent benzene, unwashed benzene, heavy benzene, are then added and the whole is heated whilst being thoroughly and very quickly stirred. The temperature at which the operation takes place is about Bil-200 C. and the pressure is about 1.5-8 atmospheres above atmospheric pressure. The time necessary for the operation varies, but in general does not exceed 1 hours. with one another into chemical combination (the nature of which has not yet been discovered) and as a result of this combination the new product is produced. It is a striking fact that during the course of the process, when the agitating device mixes the materials intimately with one another so that chemical reaction can occur, the pressure The constituents of the mixture enter at once drops to about one-half its former value in spite of that fact that the temperature further increases.

The new product according to the invention may, according to the purpose for which it is to be applied, be produced in a condition of greater or less viscosity, the variation being attained by altering the mixtures of raw materials and the additions thereto. For example, if it is desired to coat sand and small stones, it is advantageous I to produce a product of low viscosity, whilst in the case of rougher stone, wires, paper and textiles, a product of greater viscosity is desirable. When the product is applied in use, for instance by coating it on to a surface, there is only such a small amount of vaporization as to be hardly determinable by measurement.

The new product hardens under the influence of light and air superficially very fast, if used as mortar with brickwork it will prevent dampness, wire coated with it becomes an insulated conductor of electricity resisting even high tensions.

The following examples illustrate some preferred proportions of the constituents to be employed according to the invention.

(1) Tar 55 kilogrammes, coal tar pitch 25 kilogrammes, petroleum asphalt 10 kilogrammes, trichlorethylene 3 kilogrammes, benzene mixture 7 kilogrammes.

(2) Tar 54. kilogrammes, coal tar pitch 9*ki1ogrammes, petroleum asphalt 19 kilogrammes, trichlorethylene 5 kilogrammes, benzene mixture 8.5 kilo-grammes.

(3) Tar 66 kilogrammes, coal tar pitch 25 kilogrammes, benzene mixture 5 kilogrammes, trichlorethylene 4 kilogrammes.

(4) Tar 75 kilogrammes, coal tar pitch 16 kilogrammes, trichlorethylene 2 kilogrammes, benzene mixture 7 kilogrammes.

(5) Tar 60 kilogrammes, coal tar pitch 31 kilogrammes, trichlorethylene 2 kilogrammes, benzene mixture '7 kilogrammes.

If bituminous hydro-carbons and additions be 100, then there are generally between 2 or 6 parts aliphatic chlorohydrocarbons and 5 to 10 parts benzene mixture, for example, 5 parts first runnings, 2 parts solvent benzene II, or 4 parts first runnings, 3 parts unwashed benzene, 2 parts heavy benzene.

I wish it to be understood that the invention is not restricted to the particular exemplification, conditions or proportions herein set forth as they may be varied by those skilled in the art in accordance with the special purposes for which 55 the product is intended and the conditions under which it is to be utilized.

I claim as my invention:

1. The process for producing a composition for coating metal, stones, sand, wood, paper, board and textiles comprising mixing a preponderance of bituminous hydrocarbons together with smaller amounts of aliphatic. chlorohydrocarbons and a mixture of fluid homologues and fluid derivatives of benzene and heating the whole above C. under superatmospheric pressure whilst stirring very quickly until a reaction product is formed.

2. The process for producing a composition for coating metal, stones, sand, wood, paper, board and textiles comprising mixing a preponderance of bituminous hydrocarbons together with smaller amounts of aliphatic chlorohydrocarbons and a mixture of fluid homologues and fluid derivatives of benzene and heating the whole up till about 200 C. under superatmospheric pressure whilst stirring very quickly until a reaction product is formed.

3. The process for producing a composition for coating metal, stones, sand, wood, paper, board and textiles comprising mixing a preponderance of bituminous hydrocarbons together with smaller amounts of aliphatic chlorohydrocarbons and a mixture of fluid homologues and fluid derivatives of benzene and heating the whole above 130 C. under pressure to about 8 atmospheres whilst stirring very quickly until a reaction product is formed.

nous hydrocarbons with a smaller amount of a 5 mixture of aliphatic chlorohydrocarbons and fluid homologues and fluid derivatives of benzene.

5. A process for preparing coating compositions comprising reacting bituminous hydrocarbons,

aliphatic chlorohydrocarbons and fluid homo- 10' logues and fluid derivatives of benzene in thev presence of elevated temperatures and pressures exceeding 130 C. and 2.5 atmospheres respectively.

6. A process for preparing coating compositions 15 comprising reacting 82 to 91 parts of bituminous hydrocarbons with 2 to 5 parts of aliphatic chlorohydrocarbons and 5 to 8.5 parts of fluid homologues and fluid derivatives of benzene in the presence of temperatures of 130 to 200 C. and g0 pressures exceeding atmospheric by 1,5 to 8 atmospheres and while agitating the mass.

7. The reaction product of 54 to '75 parts of tar, 9 to 31 parts of coal tar pitch, 10 to 19 parts of petroleum asphalt, 2 to 5 parts of trichlor- 25 ethylene and 5 to 8.5 parts of fluid homologues and/or fluid derivatives of benzene, resulting from treatment at superatmospheric pressures and temperatures exceeding 130 C.

30 PAUL FRIEDRICH.