Improvements in Anti-fouling and Anti-corrosive Compounds for Ships' Bottoms and other purposes.
Year: 1891

page_text: Date of Application, 11th Aug., 1891-Accepted, 19th Sept., 1891
Improvements in Anti-fouling and Anti-corrosive Compounds for
Ships' Bottoms and other purposes.
I, MAX EMIL DEJONGE, a Citizen of the United States of America, residing at
Stapleton, Richmond County, Staten Island, New York, 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:
The object of my invention is to provide an anti-corrosive and anti-fouling
compound for coating objects and particularly ships' bottoms to prevent corrosion and
adherence of marine vegetable or animal growth, which compound may be applied
to any surface, will harden rapidly and may be easily softened again for repairs or
to unite with new portions which are added to replace that worn or accidentally
scraped off in any manner.
In carrying out my invention, I employ what is commonly known in the arts as
zinc dust, a distillation of zinc ores usually collected from the flues of the retorts,
as the base or body of the compound and to unite and bind the particles firmly
together in a homogeneous mass, I employ paraffine wax, by which it will be under-
stood that I mean a paraffine which forms a solid at ordinary atmospheric
temperature, and includes ozokerite, ceresine, etc.
The zine dust is preferably screened very finely and the proportions employed
are six parts by weight of zinc dust to one part by weight of paraffine, the same
being combined by heat and agitation if found necessary. When hot the compound
is a plastic mass which is applied to the surfaces to be protected by means of
a stiff short-haired brush, and is scrubbed on the surfaces to be coated. By
this means a uniform coating is obtained, about of an inch in thickness, and
when cooled to the atmospheric temperature it will be found to be hard and
adheres very tightly to the surface to which it is applied.
I am aware that paraffine has heretofore been employed as a " basis of
composition" but I do not claim such use of the same, as I employ only a
sufficient quantity of paraffine to form an effective binder and in effect, the zinc
dust is simply saturated with the hot paraffine; I am also aware that zinc dust has
heretofore been employed as a paint pigment being held in suspension in a tenacious
drying oil and I make no claim to such use of the same, my invention being quite
different therefrom in that the paraffine when fluid will not hold the zinc dust in
suspension and a sufficient quantity only is employed to form a plastic mass when
heated and when cold gives à metallic surface finish which cannot be obtained with
a paint such as just mentioned.
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 I
claim is:
1. The herein described anti-corrosive anti-fouling compound, formed of a body
of zinc dust to which a sufficient quantity of paraffine wax is added to form a
binder, the compound forming a plastic mass under the influence of heat and a
hard and practically dry compound when cold, all substantially as and for the
purpose set forth.
2. The herein described anti-corrosive anti-fouling compound consisting of zinc

page_text: dust six parts and paraffine one part by weight, combined by heat, substantially in
the manner and for the purposes set forth.
Dated this 11th day of August 1801
ALLISON BROS.,
Agents for the Applicant.