Improvements relating to the Treatment of Drying-oils for Thickening the same.
Year: 1893

page_text: Date of Application, 9th May, 1893-Accepted, 10th June, 1893
COMPLETE SPECIFICATION.
[Communicated from abroad by WILLIAM NELSON BLAKEMAN, Junior, of
No. 160, South 9th Avenue, in the City of Mount Vernon, County of
Westchester, and State of New York, United States of America, Stock
Broker.]
Improvements relating to the Treatment of Drying-oils for
Thickening the same.
I, HENRY HARRIS LAKE of the firm of Haseltine, Lake & Co., Patent Agents,
45 Southampton Buildings in the County of Middlesex 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 :-
This invention is particularly applicable to those oils technically called drying
oils.
In carrying out this invention I first select a metallic soap, preferably a metallic
soap capable of absorbing carbon dioxide, such as alumina-soap, which by the aid
of heat, I dissolve in an animal or vegetable oil not degenerated by the heat
employed. Of the vegetable oils sunflower seed oil may be employed, but I prefer
to use cotton-seed-oil. Into the oil I put about 20 to 30 per cent. of the metallic
soap, or a quantity sufficient to bring the mixture to about the consistency of jelly.
The soap may be mixed to saturation, but the per centage above named is
preferable in practice. This thickened oil I then mix with the drying oil selected
to be treated either by agitation alone or by the assistance of a water-bath of
moderate temperature. A proportion of from five to seven per cent. of thickened
oil to the drying-oil will give good results, but more or less than said pro-
portions may be employed. When cold, this mixture will be found of greater
adaptability for holding or carrying pigments than the oil before treatment. The
colour of the oil also will remain unimpaired and its drying qualities will be
preserved or improved by said treatment. First, for the reason that the high heat
necessary for completely dissolving the metallic soap having an affinity for carbon
dioxide does not degrade the character or colour of the cotton-seed-oil, but rather
tends to bleach it; and second, because the use of the metallic soap having an
affinity for carbon dioxide assists and quickens the siccative action of the already
drying character of the oil.
I do not claim merely the mixing of a metallic soap with a drying oil for
thickening or pigment-carrying purposes as such mixtures have been tried, though
with only partial success, the objection to their extended use being that the heat
employed, necessary to effect the mixture, gives such a dark colour to the oils that
they do not afterwards bleach and thus the utility of the mixture is restricted in a
very great degree. I have overcome this difficulty by my process, by first mixing
the metallic soap with an oil not degraded by the heat employed and then
incorporating this mixture, which has made this oil alkaline or basic, with the
dryiug-oil. I thus preserve the colour of the drying-oil unimpaired, and if the
soap employed be a metallic soap capable of absorbing carbon dioxide the drying
qualities of the drying-oil will be improved, in addition to the increase in its
pigment-carrying capacity, as before described. The drying-oil, thus treated as
above, say linseed-oil or other oil technically known as a "drying-oil," may be
stored for future use or be used at once for mixture with any suitable pigment or
pigments for the making of paints. Any ordinary commercial dryer may be added
to such paints where desired.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
1. The process of treating drying-oils for the purpose of thickening the same and
preserving their colour consisting in first making a compound of metallic soap
mixed, by the agency of heat, with an oil not degenerated by the heat required to
effect the mixture, and then adding this mixture to the oil selected for treatment,
with or without the further application of heat.
2. The process of treating drying-oils consisting in first making a mixture of
cotton-seed-oil and a metallic soap, by the agency of heat applied thereto, and then
adding this mixture to the oil selected for treatment, with or without the further
application of heat.
Dated this 9th day of May 1893
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.