An improved casein-cellulose composition and process for producing same.

  • Casein Company.
Date:
1904
Catalogue details

Licence: Public Domain Mark

Credit: An improved casein-cellulose composition and process for producing same. Source: Wellcome Collection.

    2/4 (page 2)
    2 N° 23,752.—A.I). l£)03, An Improved Casein-cel lidos? Composition and Process for Producing same, tlie past, where the casein alkaline casein solvents has been dissolved with alkaline solvents and which have required comparatively slow and expensive sistine* and icr 'b of November ffedhi]] hove & Malcomson, Ltd,- -1004, 5 10 15 processes of treatment to bring them into a condition to be combined with nitro-cellulose in a homogeneous compound. In practicing the invention or discovery the nitro-cellulose may, as above suggested, be dissolved in any suitable manner heretofore practiced, either by glaciacetic acid or any other proper solvents. To dissolve ordinary commercial casein for the celluloid-tike composition, either in a dry or wet condition, about equal parts of the casein and glacial acetic acid are mixed together and the mixture is then preferably heated over a water hath or in a jacket-kettle to obtain a perfect solution of the casein, which will be effected in about twenty minutes, and the casein solution thus obtained.will be comparatively clear and transparent. This casein solution can then be added directly to the* solution of niti o-cellulose and the other ingredients usually employed m the manufacture of celluloid, either with or without being diluted with alcohol or other sub¬ stances not affecting the chemical or physical character of the casein and other ingredients of the celluloid-like product, in a proportion of say about 100 parts of the casein solution to 200 parts of the nitro-cellulose solution, and the whole mixture will then be stirred or agitated in anv suitable manner, and quickly combined into a homogeneous product or mass which can be worked 20 bv any of the usual methods or machines employed in the manufacture of celluloid. The invention or discovery is, however, not to be understood as being limited to tire above-mentioned proportions of casein and nitro-cellulose; as, while a mixture of 100 parts of the casein solution to 200 parts of the nitro-cellulose 2b solution will give a product not inferior to ordinary celluloid, bul considerably cheaper; still cheaper celluloid-like products may u mai ( r\ using aigei percentages of casein and smaller percentages of nitro-cellulose. Also instead of dissolving the casein* and nitro- seT^atel}b.as hereinbefore suggested, these ingredients may be mixed iei in the desired proportions and the mixture then be dissolved by the f nrLw'10 aCld^W1f f° the fact ihat. +llis acid is a common solvent for be in o'^limitpll (f tl S° tieinyenj10n or discovery is not to be understood as mg hunted to the use of glacial acetic acid ; as anv other equivalent acid ir^?V1UCl1 W- 1 (llSBolve hoih tllp casein and nitro-cellulose will be included by the invention or discovery. Having now particularly described and ascertained the nature of my said rclai“l 111 What ““ the * *0 1- performed, I d'LetS Xi »,1—a irrs t£rcs40 compgL^^iXcellSoS St!?'glaclKefe “adT0^18 ehraCte,>> sisting in P>duct, eon- said casein sSlution wAh KeHnW^n P'lP™ tho‘TgUy mixin* employed in the manufacture of celluloid 1 * lel mgredients usually PXi» Td 3S& f product, con- Uien thoroughly inixino- the , U, °.&e wl*h glacial acetic acid, ingredients of celluloid together to form VT' 'P< ‘gledleilts um' °th Dated this 2nd dgv 50 35 45 , . usual a Jiomogeneous composition 190*3. FELL & JAMES Agents for the Applicant. Printed for His Majesty's Stationed Office, by 60 p r C) o