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Патент USA US2407616

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UNITED STATES PATENT OFFICE
2,407,615
FIRE-RESISTING COATING AND IIVLPREG
‘NATHVG COIVIPOSITIONS
Cecil Frederic Moon, Cricklewood, London, and
Norman Collinson-Jones, Hatch End, England
No Drawing. Application October 9, 1944, Serial
No. 557,928. In Great Britain September 29,
1943
10 Claims. (01. 106-84)
2
1
The following is an example of a standard
This invention relates to an improved ?re
mixture:
resisting coating and impregnating composition
and ?re-resisting materials obtained therewith.
/'
Sodium silicate, £40 Twd _________ _- 35% lbs.
The main object of the invention is to provide
a. ?re-resisting composition and ?re-resisting
5
Water ______ -1 __________________ __ 181/; lbs.
material which will overcome the drawbacks en
'
China clay ______________________ __ 58% lbs.
countered with the various ?re-resisting composi
tions and materials hitherto proposed, more par
ticularly cracking and disintegration when sub
Concentrated oil of vitriol _____ __ 2 lbs. 1 oz.
Water ___
8 lbs.
jected to high temperatures, and especially when
10 _
water is applied to them at such temperatures.
Acetic acid 80%‘ commercial ____ __ 1 lb. 4 oz.
Water _______________________ __ 3 lbs. 2 oz.
The ?re-resisting composition provided accord
The method of mixing is as follows:
ing to the present invention may be used, for in
' The sodium silicate and water are thoroughly
stance, as an emulsion for impregnation pur
beaten up at a temperature not exceeding ‘70° F.
poses, as a paint providing a protective coating, 15 in a mixer operated at a speed of 300 to 400 revs.
as a plaster to be applied direct to any surface,
per minute, for about 10 minutes; the china clay
or as a board to be used for covering and other
is then introduced and thoroughly beaten in for
purposes.
"
about 5 minutes; thereupon the cdncentrated
The invention consists in producing the fir
oil of vitriol and water are gradually introduced
4
resisting composition by the thorough admixture 20 at a temperature not exceeding 68° F. while the
of sodium silicate (and Water), china clay and/or
any of its equivalents as hereinafter referred to,
concentrated oil of vitriol (and water), and acetic
mixer is in motion for about 5 to 6 minutes, the
mixing continuing until the mass ‘becomes thor
. oughly mixed; ?nally the acetic acid and water
acid (and water) the oil of vitriol acting as a
are introduced at a temperature not exceeding '
setting agent and the acetic acid acting as a very 25 70° F. and subjected to the same thorough mix
powerful suspension agent, which is most es
sential.
The invention also consists in the ingredients
being used in the proportions and within the
range of temperatures hereinafter more particu 30
larly referred to.
ing. It is important that the vitriol be intro
duced after the sodium silicate and the china
clay and before the acetic acid so that it should
chemically act on the sodium silicate and cause
only slight coagulation, the acetic acid which is
subsequently introduced acting to complete the
coagulation whilst powerfully acting to keep the
The invention further consists in the mixture
being produced in the manner hereinafter more
china clay in suspension. If the acetic acid were
particularly described, and in its being used in
introduced before the vitriol coagulation would
the modes hereinafter referred to.
35 'be far too rapid and a subsequent addition of
The ranges of the proportions in which the
vitriol would be most ineffective in its action on
various ingredients are used are as follows:
the sodium silicate.
Instead of, or in addition to, the china clay,
Pounds
one or more of the following substances may be
Sodium silicate __________________ .. 28 to 40
'70
40 used: pure talc, talc and French chalk, kaolin,
Concentrated oil of vitriol ________ __ 11/2 to 2V;
Acetic acid ______________________ _- =34; to 11/2
asbestine, kalytes, Alusan, the latter two being
China clay ______________________ __ 45
to
forms of china clay obtainable under these names
Great Britain.
The temperature ranges of the ingredients ,, in The
emulsi?ed mixture may be used for the
when introduced into the emulsi?er are as'iol w. Cu impregnation of linen and other textile materials
lows:
to produce, for instance, ?re-resisting suits,
°F.
Sodium silicate ____________________ __ 65 to 70
gauntlets and other ?re-resisting wearing ap
Concentrated oil of vitriol __________ -_ 58 to 68
parel; also covers of air ?lled dinghies, parachute
Acetic acid
60 to '70 50 covers, etc. In the case of this application a
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while at a temperature falling within the follow
ing ranges:
substantially reduced amount of china. clay ii’:v
used.
.
‘F.
When used as a paint, such as for the protec
Sodium silicate ____________________ _- 65 to '70
tion of timber in buildings, ships and aircraft,
Concentrated oil of vitriol __________ -.. 58 to 68
roof timbers, wooden huts, in?ammable building
Acetic acid
60 to 70
~ the china, clay being‘ added at the surrounding
bo'ard, ammunition boxes, and other in?ammable
structures and articles subject to ?re danger, the
application of two coatings will generally be suffi
éient.
temperature.
'- .4. A ?re-resisting coating and impregnating
In the use as a paint, the proportion of '
the china clay and/or its equivalent is increased
by about 25%.
~
composition as claimed in claim 1, in which the
.1
ingredients, including the water introduced with
In order to produce a ?re-resisting plaster, the
emulsi?ed mixture is added to a cellulose base,
each one of them are used in the following spe
for example, jute, hemp, sisal, bagasse, straw, etc.,
ci?c proportions:
in the proportions of 1/3 emulsion to 2/3 cellulose
base. The plaster can be applied direct, by ordi
7' Water
Sodium silicate, 14(l'1‘wd _________ __ 35%, lbs.
18% lbs.
nary plasterer’s technique, to any surface, e. g.
'
wood, brick, metal and even glass, without any I
deleterious effect to such surface. The material
has strong adhesive properties and no additional
China clay ______________________ __ 58% lbs.
Concentrated oil of vitriol _____ .._ 2 lbs. 1 oz.
' Water ..
support, e. g. expanded metal or wire netting is‘ ,
8 lbs.
,.Acetic acid, 80% commercial___-_ 1 lb. 4 ozs.
required for ordinary application.
Water _______________________ __ 3 lbs. 2 oz.
The main uses of such a plaster are: ‘for the‘ ''
. 5. A process of manufacture of ?re-resisting
treatment of walls, ceilings and floors, which, if
required, may then be papered, distempered or 25 coating and impregnating composition as claimed
in claim 1, in which the ingredients, including the
painted with water paint; the lining of cold stor
age rooms; the insulation of gas stoves, refrig- '
water introduced with each one of them are used
erators, etc.; lagging of boilers, steam piping and .
in the following speci?c proportions:
the like; ?reproo?ng protection of all steel-work
in buildings, power stations, gas-works, etc.
The plaster is of light weight and holes can be
30,
China clay ______________________ -_ 58% lbs.
bored and nails and screws driven into it without
damage; it can also be easily sawn. Its thick
ness may vary from 1/2" to 2" according to re
quirements.
Sodium silicate, 140 _Twd _________ __ 351/4 lbs.
Water ..
18%; lbs.
Concentrated oil of vitriol _____ __ 2 lbs. 1 oz.
»Water _
35
In the case of ?re-resisting boards for covering
and other purposes, they may be produced in a
thickness of 1%" and, if necessary for special
work, they may be laminated up to four thick
_ 8 lbs.
.Acetic acid, 80% commercial“--- 1 lb. 41oz.
Water _______________________ _- 3 lbs. 2 oz.
‘ and in which the temperature of the admixing
of sodium silicate and water does not exceed 70°
nesses. If desired, the boards may be moulded. 40 F., that of the concentrated oil of vitriol and
water does not exceed 68° F., and that of acetic
In this form it can be used in sheets, portable
acid and water does not exceed 70° F.
shields and screens.
I
6. A process of manufacture of ?re-resisting
We claim:
>
coating and impregnating composition as claimed
1. A ?re-resisting coating and impregnating
composition comprising a thorough mixture of 45 in claim 1, consisting in effecting admixture as
sodium silicate (and water) ; a ?ller selected from 1
the group consisting of: china clay, pure talc,
talc and French chalk, kaolin, asbestine, kalytes,
' Alusan; a setting agent consisting of concen
trated oil of vitriol (and water), and a suspen
sion agent consisting of acetic acid (and water).
2. A ?re-resisting coating and impregnating
composition comprising a thorough mixture of ,
sodium silicate, a ?ller consisting of china clay,‘
a setting agent consisting of vitriol (and water), i
and a suspension agent consisting of acetic acid
and in which the various ingredients are used
within the following ranges of proportions:
Pounds
Sodium silicate __________________ __ 28
China clay ______________________ .._ 45
to
to
follows: the sodium silicate and water are thor
oughly beaten in a mixer for about 10 minutes;
the china clay is then introduced and thoroughly
beaten in for about 5 minutes; thereupon the
concentrated oil of vitriol and water are gradu
ally introduced while the mixer is in motion for
about 5 to 6 minutes, the mixing continuing until
the mass becomes thoroughly mixed; ?nally the
acetic acid and water are introduced and sub
jected to the same thorough mixing.
7. A painting composition as claimed in claim
2 as set forth.
8. Fire-resisting articles impregnated with a
composition as claimed in claim 2 as set forth.
9. Fire-resisting plastering consisting of a com
60
40
position as claimed in claim 2 added to a cellulose
‘70
base as set forth.
Concentrated oil of vitriol ________ __ 11/2 to 21/4
Acetic acid ______________________ __ 3/; to 11/2
10. Fire-resisting ‘boards for covering and other
purposes including a composition as claimed in
3. A process of manufacture of ?re-resisting 65 claim 2 as set forth.
coating and impregnating composition as claimed
in claim 2, consisting in adding the ingredients
CECIL FREDERIC MOON.
NORMAN COLLINSON-JONES.
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