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Патент USA US2131371

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Patented Sept. 27, 1938
- 2,131,371‘
FFICE
2,131,371
.
PLASTIC MATERIAL
Gustavus J. Esselen, Swampscott, Mass., assignor
to The A. S. Boyle Company, Cincinnati, Ohio,
a corporation of Ohio
No Drawing. Application February 7, 1935,
Serial No. 5,505
8 Claims‘.
(Cl. ' MIG-+22)
My present invention relates to plastic ma
Other plasticizers may besubstituted for di
butyl phthalate, for instance, diethyl or di
terials which before drying have a, doughy putty
methyl phthalate, triacetin, tricresyl phosphate,
like consistency and after drying have the gen
eral consistency and characteristics of wood. ‘ and the like; also gums, such as ester gum, and
Such materials particularly when containing dammar gum, or non-drying oils may be used ac
nitro-cellulose are useful for crack ?llers and cording to the characteristics required of the
general repair work, for hand molding, for re
?nal product. The solvents employed may ‘also
pairing dents in metal work, for building up or be varied somewhat but I prefer to use those
changing the shape of articles, and for many which I have mentioned, all of which are com
patible with the other materials and act as solv 10
10 other purposes; but their usefulness has been lim
ited by their high shrinkage during drying and ents for the binders to be employed. The solv
to some extent by their rapid burning qualities, _' ents to be used must of course be compatible
as well as by the in?armnability of the solvents with the other materials employed, and should be
they contain. Such materials have not been non-in?ammable. Any solvent possessing this
feature of compatibility may be employed in 15
15 used to any considerable extent in the manufac
ture of articles by the use of molds because of place of those mentioned by way of example.
the shrinkage which is accompanied by-warping,
cracking, and change of shape.
-
My present invention provides plastic non
20 in?ammable or slow burning material having
25
before drying the general characterof putty and
after drying that of wood, which shrinks but
little during drying, does not give off in?am
mable vapors, keeps its shape well, and is capable
of being formed in open molds of tin, lead, plas
ter of Paris or the like.
The following formula gives a satisfactory
product for these purposes:
Parts by weight
3
Polymerized vinyl acetate _______________ __
ranging from soft pine to mahogany, and two or’
more kinds may be combined to produce differ
20
ent characteristics. Other cellulosic materials
may be employed wholly or in part, and small
amounts of inorganic ?ller such as talc or iii
fusorial earth. The proportions of all the ma
terials may be varied somewhat according to the 25
particular use to which the product-is'to be put.~
The following are specimen formulae which
give excellent results:
Parts by weight
18
“Vinylite
A” _________________ __. _________ __
Dibutyl phthalatens ___________________ -_
4
Ethylene dichloride _____________________ __ .72
Ethylene
dichloride _____ _;__'__' __________ __
72
tetrachloride; _____________ __,_____
18
?our _______________ __> _____ __- ____ __
23
Carbon
Wood
35
Wood flour is the best ?ller for'most purposes.
This may be made from a large variety of woods,
tetrachloride ___________________ __
18
flour ___________________ __' _______ __
23
The polymerized vinyl acetate which I prefer
to employ is sold under the trade name “Vinylite
A”, and serves as a binder. The dibutyl phthal
ate‘ toughens the' product and renders it less
brittle and more rubbery. The ethylene dichlo
40 ride and the carbon tetrachloride are solvents
which disappear on exposure to the air leaving
the material hard and wood-like. The wood
flour serves as a. filler to give bulk and body to
the material and the ?nal wood-like character
_
45 istics of the dry product.
Other polymerized synthetic resins than vinyl
acetate may be employed for instance polymer
ized vinyl benzene, known by the trade name
of “Victron”. Also the alkyd resins produced by
50 the interaction of glycerine and phthalic acid,
known by the trade name of "GlyptaP’ may be
Carbon
Wood
1Q
This gives a harder and less'rubbery prod 35
uct than the preceding formula.
Both of these -
products have good adhesion, only slight shrink
age, and are tough when dry.
If “Victron” is to be used the following for
mula-may be employed.
40
Parts by weight -
"Victron’f _______________ __'_ ________ .._.____
Dibutyl
18
phthalate ______ __- ______________ __
4
dichloridenv ____ __. __________ __
_86
Wood ?our ______________ ___;_'_ _________ __
23
Ethylene
is satisfactory: .
Parts by weight
“Glyptal DUX3002__._,___v ___________ __v____
24
Chloroform _____________________ __Y_____ __
94
used as a binder. These resins possess in common
Japan
drier ____________________________ __
5
Wood ?our ____________________________ __
36
in which they are dispersed.
Many other syn
thetic resins are known which have the same
- physical property and all such resins are in
eluded within the term “synthetic resin” as used
60 herein.
45
If “Glyptal" is to'be used the following formula
the physical characteristic of forming a hard
mass .which acts as a binder for the cellulosic
55 ?ller upon evaporation of a solvent substance
30
50
This material has excellent adhesion, only a 55
slight shrinkage, is slightly rubbery, does not
give oif in?ammable vapors and may be molded
under pressure without heat. '
In making up these materials the resin binder
and the plasticizer, if any, are dissolved in’ the
2
2,131,871
solvent or mixture of solvents to form a smooth
solution. The wood ?our or ?ller is then mixed
in and the mixing continued until a homogeneous
mixture is produced.
In using any of the plastic materials produced
as described above, the plastic material is applied
and shaped by hand or by tools as required, or the
mold is ?lled and the plastic is allowed to dry in
the air or in some cases by the application ‘of
10 gentle heat. When dry it is of a hard wood-like
nature, can be cut, bored, planed or sawn with
ordinary tools; it will hold nails, tacks and screws
and, in fact, becomes a grainless wood. Coloring
materials may be added if required.
15
'
What I claim is: '
1. The plastic composition of matter which
before exposure to the air has a doughy putty-like
. consistency and on more exposure to the air has
the general characteristics of wood and is com
20 posed chiefly of a cellulosic ?nely divided ?ller, a
binder of polymerized vinyl acetate, and a com
patible volatile solvent, said polymerized vinyl
resin being present in an amount sui?cient to hold
the ?ller to form a grainless wood after the dis
25 appearance of a volatile solvent and without
application of heat or pressure, the percentage of
polymerized vinyl acetate being substantially 66%
percent, based on the weight of the cellulosic ?ller.
2. The plastic composition of matter which
30 before exposure to the air has a doughy putty
like consistency and on mere exposure to the air
general characteristics of wood and is composed
of:
>
Parts by weight, about
Polymerized vinyl resin _____________ __'_.____
18
Ethylene dichloride ______________________ __
72
Carbon tetrachloride ____________________ __
18
Finely divided cellulosic material such ‘as
wood ?our ____________________________ __
23_
5. The plastic composition of matter which
before exposure to the air has a doughy putty-like 10
consistency and on exposure to the air has the
general characteristics of wood and is composed
of:
Parts by weight, about
Polymerized vinyl resin __________________ __
Ethylene dichloride _________________ __'_____
1
Carbon tetrachloride ________________ _______
18
Dibutyl phthalate _______________________ __ ~
4
Finely divided cellulosic material such as
wood ?our ____________________________ __
23
20
6. The plastic composition of matter which
before exposure to the air has a doughy putty
like consistency and on exposure to the air has
the general characteristics of wood and is com 25
posed of :
'
-
'
Parts by weight, about
Polymerized vinyl benzene _______________ __
18
Dibutyl phthalate _______________________ __
4
Ethylene dichloride _______ __, ____________ __
86
Finely divided cellulosic material such as
wood ?our ____________________________ __ 23
has the general characteristics of wood and is
'7. The plastic composition of matter which
composed chiefly of a cellulosic ?nely divided
?ller, a binder of polymerized vinyl benzene, and before exposure to the air has a doughy putty
35 a compatible volatile solvent, said polymerized vlike consistency and on exposure to the air has 35
vinyl benzene being present in an amount sum- » the general characteristics of wood and is com
'
cient to hold the ?ller to form a grainless wood posed of:
after the disappearance of a volatile solvent and
without application of heat or pressure, the per
Parts by weight, about
Alkyd resin _____________________________ __
24,
Chloroform _____________________________ __
94
stantially 66% percent, based on the weight of the
Japan drier ____________________ -1 ______ _..
5
cellulosic‘ ?ller. >
Finely divided cellulosic material such as
wood ?our
40 centage of polymerized vinyl benzene being sub
3. The plastic composition of matter which
before exposure to the air has a doughy putty
45 like consistency and on exposure to the air has the
general characteristics of wood and is composed
36
8. A plastic composition of ‘matter which be
fore exposure to the air has a doughy, putty-like
chie?y of a cellulosic finely divided ?ller, a binder
consistency and on mere exposure to the air has
the general characteristics of wood and is com
of alkyd resin, ‘and a compatible volatile solvent,
the percentage of alkyd resin being substantially
75 percent,‘ based on the weight of the cellulosic
and a binder of synthetic resin selected from the
?ller.
-
-
.
4. The plastic composition of matter which
before exposure to the air has a doughy putty
like consistency and on exposure to the air has the
posed chiefly or a cellulosic ?nely divided ?ller,
group consisting of vinyl resins and alkyd resins,
the percentage of synthetic resin being between
66% per cent and 75 per cent, based on the weight
of the cellulosic ?ller.
_
'
GUSTAVUS J. ESSELEN.
40
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