IMPROVED MEANS OF DISSOLVING VULCANIZED INDIA-RUBBER, AND INDIA-RUBBER COMPOUNDS
Year: 1885

page_text: India-rubber Compounds.
I JOHN BAGNALL Manager for Messieurs Charles Macintosh and Company of
Cambridge Street Manchester in the County of Lancaster India Rubber Manu-
facturers do hereby declare the nature of my invention for "IMPROVED MEANS OF
DISSOLVING VULCANIZED INDIA-RUBBER, AND INDIA-RUBBER COMPOUNDS" to be as
follows:-
This invention consists chiefly in utilizing creosote oils for this purpose.
Creosote oils which are produced in somewhat large quantity in the distillation
of ordinary coal tar constitute a material for which useful applications are still
needed.
The chief use to which they are at present put is for pickling or creosoting
wood to prevent it from the ravages of insects, but the price commanded for this
purpose is so low that many tar distillers simply use them as fuel underneath
their stills.
I have discovered that by using creosote oils either by themselves, or in
conjunction with any of the volatile or non-volatile oils or with any of the
ordinary solvents of raw india rubber a cheap and effective solvent for vulcanized
india-rubber is obtained.
The vulcanized india-rubber (or india-rubber compound) is reduced to as finely
divided a state as possible by grinding between rollers or other suitable means to
obtain the same object.
The ground material is then mixed with the solvent and by the application of
heat in a closed or open vessel by preference the, former fitted with a suitable
arrangement for stirring or agitating the compound, when after a time (about ten
hours) it will be found that the rubber has become completely dissolved.
The proportions of the rubber and the solvent may be varied according as the
resulting compound is required; in the form of dough or varnish.
The following proportions answers very well, namely, twenty pounds of the
solvent to 10 pounds of rubber,
The heat employed should not exceed 300 degrees (Fahrenheit).
The time for dissolving varies according to the degree of heat employed.
This compound can be used by itself or in conjunction with raw india-rubber
and may be applied to any of the uses to which india-rubber and india rubber
compounds are now applicable.
Dated this 30th day of September 1885.

page_text: Improved Means of Dissolving Vulcanized India Rubber and
India Rubber Compounds.
I JOHN BAGNALL Manager for Messieurs Charles Macintosh and Company of
Cambridge Street Manchester in the County of Lancaster India Rubber Manu-
facturers do hereby declare the nature of my invention for IMPROVED MEANS OF
DISSOLVING VULCANIZED INDIA RUBBER, AND INDIA RUBBER COMPOUNDS and in
what manner the same is to be performed, to be particularly described and t
ascertained in and by the following statement :-
This invention consists chiefly in utilizing creosote oils for this purpose.
Creosote oils which are produced in somewhat large quantity in the distillation
of ordinary coal tar constitute a material for which useful applications are still
needed.
The chief use to which they are at present put is for pickling or creosoting
wood to preserve it from the ravages of insects, but the price commanded for this
purpose is so low that many tar distillers simply use them as fuel underneath
their stills.
I have discovered that by using creosote oils, either by themselves or in
conjunction with any of the volatile or non-volatile oils or with any of the
ordinary solvents of raw india-rubber a cheap and effective solvent for vulcanized
india-rubber is obtained.
The vulcanized india-rubber (or india rubber compound) is reduced to as finely
divided a state as possible by grinding between rollers or other suitable means to
obtain the same object.
The ground material is then mixed with a solvent and by the application of
heat in a closed or open vessel (by preference the former) fitted with a suitable
arrangement for stirring or agitating the compound; when, after a time (about ten
hours) it will be found that the rubber has become completely dissolved.
The proportions of the rubber and the solvent may be varied according as the
resulting compound is required in the form of dough or varnish.
The following proportions answer very well: namely, twenty pounds of the
solvent to ten pounds of rubber.
The heat employed should not exceed 300 degrees (Fahrenheit). The time for
dissolving varies according to the degree of heat employed.
This compound can be used by itself or in conjunction with raw india rubber
and may be applied to the preservation of wood, the coating of ships' bottoms or
to any of the uses to which india rubber and india-rubber compounds are now
applicable.

page_text: Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed I declare that what
I claim is
The dissolving of vulcanized india rubber and its compounds by means of
creosote oils, either by themselves, or in conjunction with any of the volatile or
non-volatile oils or with any of the ordinary solvents of india-rubber substantially
as herein before described,
GEORGE DAVIES,
Agent for the Applicant.