Improvements in the Preparation of Rapidly Drying Resinous and other Oils or Varnishes.
Year: 1890

page_text: Date of Application, 2nd Aug., 1890
Complete Specification Left, 4th May, 1891-Accepted, 1st Aug., 1891
TRUVIDIONAL ST MUIFICATION.
Improvements in the Preparation of Rapidly Drying Resinous and
other Oils or Varnishes.
I, GEORGE MACAULAY CRUIKSHANK C.E. of 62 Saint Vincent Street, in the
City of Glasgow, Lanarkshire, Registered Patent Agent and Fellow of the Institute
of Patent Agents, do hereby declare the nature of this invention, as communicated
to me by Dr. E. Pietzeker of 115 Mittelweg-Pöseldorf, Hamburg, in the Empire
of Germany, to be as follows :-
This invention has for its object to so treat resinous and other oils or varnishes
that when they are applied to or coated upon a surface they will dry within twenty-
four hours, and after drying they become hard, being however neither sticky nor
brittle.
Heretofore resinous and other oils have been manufactured which dried after
a considerable time but such oils after application remain sticky for weeks, and
hence they are comparatively useless for practical purposes. This defect is fully
remedied by the process herein described.
This process consists in dissolving in the oil, resin and one of the substances used
in the manufacture of linseed oil varnish and in treating the oil with one of the
sulphur compounds hereinafter mentioned.
Among the substances used for the preparation of linseed oil varnish, the most
suitable for this invention are those which are formed by treating linseed oil or
resinous soap with a solution of chloride of manganese or with corresponding lead
salts to obtain linseed oil manganic acid and resinous manganic acid.
Among the sulphur containing compounds the most suitable, with the exception of
sulphates, are all the sulphur compounds used for vulcanizing caoutchouc. In
particular all sub-sulphurous acids and all metallic and other sulphides can be
used.
The process is carried out in the following manner :-
Assuming the weight of the oil used in the varnish to be 100% 35% of resin
is melted and into it 5% of the oil is poured then a percentage (about 5%) of
resinous manganic acid is added until the solution is thoroughly clear. A solution
of 5% of sulphide of soda is subsequently poured into the mass and a similar
quantity of water after which the mixture is heated and stirred for about half an
hour. The remaining oil is as highly heated as possible without rendering it dark
and the mixture prepared as described is poured into it, the mass being energetically
stirred for a few hours and an even heat maintained until the water has collected
at the bottom and the oil has become clear.
When the oil varnish thus obtained is spread over a surface it will dry within
twelve to twenty-four hours and ceases to be sticky.
Dated this First day of Aust 1900
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in the Preparation of Rapidly Drying Resinous and
other Oils or Varnishes.
I, GEORGE MACAULAY CRUIKSHANK C.E. of 62 Saint Vincent Street in the
City of Glasgow, Lanarkshire, Registered Patent Agent and Fellow of the Institute
of Patent Agents, do hereby declare the nature of this invention and in what
[Price 4d.]

page_text: manner the same is to be performed (as communicated to me) to be particularly
described and ascertained in and by the following statement:-
This invention has for its object to so treat resinous and other oils or varnishes
that when they are applied to or coated upon a surface they will dry within twenty-
four hours, and after drying they become hard, being however neither sticky nor
brittle.
Heretofore resinous and other oils have been manufactured which dried after a
considerable time but such oils after application remain sticky for weeks, and hence
they are comparatively useless for practical purposes. This defect is fully remedied
by the process herein described.
This process consists in dissolving in the oil, resin and one of the substances used
in the manufacture of linseed oil varnish and in treating the oil with one of the
sulphur compounds hereinafter mentioned.
Among the substances used for the preparation of linseed oil varnish, the most
suitable for this invention are those which are formed by treating linseed oil or
resinous soap with a solution of chloride of manganese or with corresponding
lead salts to obtain linseed oil manganic acid and resinous manganic acid.
Among the sulphur containing compounds the most suitable with the exception
of sulphates are all the sulphur compounds used for vulcanizing caoutchouc. In
particular hyposulphite of potash, sodium, aminonia, strontium, baryta, calcium and
all metallic and other sulphites can be used. The process is carried out in the
following manner :-
Assuming the weight of the oil used in the varnish to be 100%; 5% of
resin is melted and into it 5% of the oil is poured then a percentage (about 5%)
of resinous manganic acid added until the solution is thoroughly clear. A solu-
tion of 5% of sulphide of soda is subsequently poured into the mass and a
similar quantity of water after which the mixture is heated and stirred for about
half an hour. The remaining oil is as highly heated as possible without rendering.
it dark and the mixture prepared as described is poured into it the mass being
energetically stirred for a few hours and an even heat maintained until the water
has collected at the bottom and the oil has become clear.
When the oil varnish thus obtained is spread over a surface it will dry within
twelve to twenty-four hours and ceases to be sticky.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed (as communicated to me)
I declare that what I claim is :
The preparation of rapidly drying resinous and other oils or varnishes, consisting
in dissolving in the oil resin, a dryer, and in treating the oil with one of the
following sulphur compounds: sulphite of potash, sodium, ammonia, strontium,
baryta, calcium hyposulphite of potash, sodium, ammonia, strontium, baryta,
calcium sulphuret of potash, sodium, ammonia, strontium, baryta, calcium; sub-
stantially as herein before described.
Dated this Second day of May 1891.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.