Improvements in and relating to Plastics, more especially Designed for Imparting to Glue a Permanent Elasticity, and Adapted to be used for Various Purposes.
Year: 1889

page_text: Date of Application, 19th Nov., 1889-Accepted, 21st Dec., 1889
COMPLETE SPECIFICATION.
Improvements in and relating to Plastics, more especially
Designed for Imparting to Glue a Permanent Elasticity, and
Adapted to be used for Various Purposes.
I, ROBERT WOOD JOHNSON, residing at New Brunswick, in the County of
Middlesex and State of New Jersey, one of the United States of America, Manufac-
turing Chemist, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement:-
My invention relates to improvements in Plastics, and the objects of my improve-
ment are to impart to dissolved glue or gelatine a permanent elasticity with firmness
or temper unaffected by the various conditions of the atmosphere or its temperature,
so as to adapt it to a great many purposes. As for example, in the manufacture of
Printers Rolls, Corks or Stoppers, Soap, Medical Plasters and Pills, Ointments and
Salves, in the coating or covering of fabrics, Clothing and Paper, in the manu-
facture of Cement, Flexible Glue, &c. &c.
My composition consists of the following ingredients combined, for the greater
number of purposes, in the following proportions: Equal parts of glue, glycerine,
and sulpho-oleate of sodium, (or sulpho-oleate acid neutralized with an alkali).
These proportions seem to be the most suitable when the compound is to be used in
thin sheets, as for coating plasters, pills, fabrics, &c., but when used in thick layers,
as in the manufacture of Printers rolls, corks or stoppers, &c., I prefer to use the
following proportions: Glue, one pound, glycerine, three quarters of a pound, sulpho-
oleate of sodium, (or of potash) three quarters of a pound.
In said compound various substances can be incorporated to reduce the cost of the
article produced, for example, in Printers rolls, pigments, ground barks or woods can
be used for that purpose, and also to modify its consistency.
My compound above stated, is prepared by dissolving glue or gelatine in the
smallest possible amount of water or moisture with heat as steam, to which is added
an equal amount of glycerine, and the two elements are thoroughly mixed and then
the sulpho-oleate of sodium is added, and the whole is heated or boiled until the bulk
of the moisture used to soften the glue is driven out, and the whole is thoroughly
mixed and combined. The consistency is diminished if desired, by the addition of
more glycerine or more sulpho-oleate of sodium.
When the compound is spread in a thin sheet upon paper or upon fabrics it is
rendered nearly insoluble by dipping it in, or by treating it with bichromate of potash
or chromic acid.
The compound can also be used in combination with Vaseline or with fatty oils,
such as lard, castor-oil, and other oils and fats.
For many purposes the glycerine may be omitted from the compound, and the
composition be made of one part of gelatine to one and a half or two parts of sulpho-
oleate of sodium. When it is made of two parts of sulpho-oleate of sodium to one
part of gelatine or glue it is rendered more flexible and adhesive.
The compound is also well adapted for use in the manufacture of ointments, salves,
'cerates, &c. in which the drug is either completely dissolved or emulsified so as to
be in a condition to pass readily through the unbroken cuticle, the base itself being
perfectly absorbable.
Said ointment consists of the above stated sulpho-oleate acid neutralized with an
alkali, as sodium or potash, into which the desired drug, as the extract of Belladonna,
the oxide of zinc, &c., is dissolved, to which is added either lard or vaseline in
amount about equal to the neutralized sulpho-oleate acid, and to this compound is
added of dissolved gelatine, Isinglass, or Gum-arabic or starch about 80% of the
CD27

page_text: neutralized sulpho-oleate acid, to form by evaporation a film to protect the ointment
after it is applied to the cuticle, said film also protecting broken or inflamed skin,
and being perfectly soluble in water can be washed off with cold water.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what 1
claim is:-
First. The herein described composition of matter consisting of glue and sulpho-
oleate of sodium (or of potash) substantially as specified.
Second. The herein described composition of matter consisting of sulpho-oleate cf
sodium, glue, and glycerine, substantially as specified.
Third. The herein described combination of matter or ointment base consisting of
neutralized sulpho-oleate acid, vaseline or fatty matter with gelatine or its described
equivalent, substantially as set forth.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.