USRE11069E - Eugen schaal - Google Patents

Description

UNITED STATES PATENT OFFICE.

' scorn SCHAAL, or FEUERBACH, WURTEMBERG, GERMANY.

MANUFAOTU RE OF ARTIFICIALCO PAL.

i SPEOmOA'fl QH-hrming part of Boiuued wk! Patent No..11,b69, dated April 1, 1890. Original llo. 8 B2,907, dated Xsylfi, 1888. Application-for mince filed oa'aa 28,1888- Bnrlsl'lo. 259,070-

To all whom; it may concern:

Be it known that I, EUGEN SCHAAL, a sub-. ject of the King of Wiirteinberg, residing at Fcuerbach,,near Stuttgart, in the Kingdom of \Viirtemberg and German Empire, have invented new and useful Improvements in' the Manufacturoof Artificial Copal, of which the following'is a specification. v

This invention relates to the manufacture of a new resinous product, which I term artificial copal, and which is obtained by the action of an alcohol- -suchjas resorcin'-upon 'colophon'y,'onsimilar resins, and subsequent separation bydistillation'in 'vacuo at'a temrgi perature of about 300 centigrade.

fifteen grams of ether, shaken together with;

As an example of the manner in which my invention can be carried out, I give the fol-- lowing:

' 1 heat colophony in a metallic retort containing a stirring device under a vacuum of about sixty-six centimeters tea temperature of about 305 centi grade, where the soft constituents are distilled off. Of the residuum I takefive hundred pounds and mix the same with one hundred pounds of resorcin. 'lhis'mass .is then heated in a closed boiler under agitation to from 200 to 250 centigrade until the pressure in the boiler-has reached from fifteen to thirty pounds to the square inch. Then the steam formed in the boiler is allowed to escape. A small sample of about five grams is taken from the boiler,vdissolved in about one gram of a solution of sodium carbonate,

and finally 'the clear liquid portion is sepa rated; Itthis liquid portion, after having been supersaturated with a mineral acid, remains clear, the formation of. the resin-acid ether is completed; but it a thick mass is formed thc-contcntsof the boiler are again heated, as above stated, until a sample taken therefrom and treated as above stated indi' cates that the formation of the resin-acid other is completed. This process usually takes from six to eighthours. The entire mixture is then distilled on undcravacunm of about sixty-six centimeters up to the temperature of about 305 centigrade, and the residuum which re-' mains in the boiler, and which'constit-utes my new resinous product, is poured on fiat trays, where it is permitted to coololf.

In the foregoing process other alcohols maybe substituted for rcsorcin-such, for instance, as methyl alcohol, ethyl alcohol, pheno], the two naphthols, orglycerine. V

This prod not has in its outward appearance a resemblance to eopal, and for that reason I have termed the same f artificial copal."

My artificial copal is insoluble in carbonate of soda; but if the same is finely pulverized and shaken in from one to four parts of cold it dissolves readily, while natural copal cannot be dissolved in any ap preciable quantity by shaking repeatedly in benzine.

By exposing my artificial copal fiothe action of caustic alkalies in the presence of heat it s splitup into the resin acid and the alcoholic petrolenni-benzine I body used in itS-preparat-ion-that is to say,

it the artificial copal has been prepared by the act-ion of resorcin on abietic acid it will split up-into abietie acid and resorcin. The

formula for the resin-acid ether,-'obtained by the action of resorcin ((2,H,0,) on agifltic acid, (o,,n,,0,,) is as follows: c n o g since the two equivalents of water, 2(Oll escape, the formula for the -resin-acnl'-ethcr,

. prepared as above stated, is C il flgggc ll I do not claim in this application the process of producing resin-acid ethers, such havingbeen claimed in Letters Patent No. 335,485, granted to me February 2, 1886. e

What I- claim as new, and desire to secure by Letters Patent, is-

'1. The new resinous product herein dcscribcd,which is produced by the action of an alcohol on a resin acid, which dissolves read ily .in petroleum-benzine,but it isinsoluble in alkaline carbonates, and which by the action of a oaustic n-lkalisplits up '|n,to a resin acid and an alcohol,

:3. The new resinous product herein described, produced by the action of an alcohol upon colophony, which productis soluble in petroleunrbcnzinc but insoluble in alkaline carbonates, and which by the action of caust-icalkalies splits up into abieticacidand the alcohol employed in the operation.

In testimony whereof I have hereunto set my hand in presence of two subscribing, wit.-

ncsses.

. EUGEN SCHA'AL \Vitnesssz' H. HKNDLER, CARL \VERNLE.