US2292541A - Acceleration of the seasoning speed of surface coverings - Google Patents

Description

Patented Aug. 11, 1942 ACCELERATION OF THE SEASONING SPEED OF SURFACE COVERINGS Donald G. Patterson, Stamford, Conn., assignor to American Cyanamid Company, New York,

v N. Y., a corporation of Maine No Drawing. Application April 26, 1940,

' Serial No. 331,811

1 Claim. This invention relates to the acceleration of the compositions such as floor covering compositions containing siccative binders.

- An object of this invention is to provide accelerators for surface covering compositions containing siccative binders which will cause such compositions to cure more rapidly.

This and other objects are attained by incorporating in a siccative composition which is to be used in a floor covering composition or other surface covering composition formoguanamine.

The following example is given by way of illustration and not in limitation.

' Example Parts by weight siccative bi r 30 Wood flour 30 Whiting 20 Lithopone 20 Formoguanamine 0.1

These substances with or without a small proportion of drier, e. g., 0.1% cobalt naphthenate, are mixed together, e. g., in an internal mixer. The compacted mass which is delivered from the mixer may be disintegrated, as by a set of scratch rolls which comprises a plurality of rolls having intermeshing teeth projectingfrom their surfaces. The resulting material is sheeted on calender rolls or optionally it may be further .rate of curing or seasoning of surface covering mixed and disintegrated and then calendered."

The material may be calendered on to burlap or other fibrous backing if desired. The sheeted material is placed in a. stoving. oven through which a current of heated air from about 70 C. to about 90 C. is circulated until the material is completely seasoned, i. e., until the sheet acquires the necessary degree of hardness. Higher or lower temperatures may be used if desirable.

The hardness may be measured by any of the methods generally employed in the manufacture of linoleum. See the Federal Stock Catalogue (U. S. Government Printing Ofiice), section 4,

part 5, pages ILL-L351 et seq. and pages LLL-L-36l et seq., for the method employed herein. The time required for seasoning a 2 mm. sheet of the above composition is about 4 to 5 days. The resulting seasoned floor or surface covering has about the same strength, flexibility and color as compositions not containing the accelerator; ties may be changed by many other accelerators sufliciently and in such a way that the materials One or more of these propersiccative oil as used herein other gums produced therewith are unsatisfactory. The seasoning speed of a 2 mm. sheet of the same mixture which does not contain the formoguanamine is about 18 to 20 days.

The siccative binder utilized in the above example is an alkyd resin which has siccative properties, i. e., a reaction product of fumaric acid with a non-conjugated terpene (alpha pinene) and triethylene glycol, modified with linseed oil fatty acids. Other similar resins may be used which are drying oil-modified reaction products of maleic or fumaric acids with a terpene and a polyhydric alcohol. Other alkyd resins which are modified with drying oils may be used such as the phthalic-glyceride resins, the glycolrmaleic resins, and mixed resins such as the phthalicfumaric-glycol-glyceride resins. With other types of binders, the seasoning temperature may be varied appropriately and, of course, the time required may be diiferent. About the same proportional accelerating effect is obtained when various siccative binders are employed.

Other binders which may be used are those which are derived from the drying oils and may be made in any convenient well-known manner, such as the method described in British Patent 305,656, or the binders may comprise any of the various alkyd resins having siccative properties. For drying oil binders, linseed oil is preferable for economic reasons, but other siccative oils may oil, tung oil, soya-bean oil, perilla oil, ,oiticica oil,.

Scheiber oil,sunflower-seed. oil, etc. The. term is intended to include not only the so-called drying oils but also the so-called semi-drying oils. Furthermore, it is possible to use mixtures of siccative oils with other fatty oils of the non-drying type.

It may be preferable in the manufacture of linoleum tomake use of so-called scrim-oil or shed oil either alone or fluxed with rosin or or resins and/or mixed with a proportion of the so-called mechanical oil. Either of these types of oils may be used singly if desired.

In the preparation of the siccative oil binders is customary to use rosin in admixture with the oil although other substances of the same type may be used, e. g., Kauri gum, Congo gum, ester and/or the whiting and e. g., about 0.005-1%.

- and/or glass, etc. Among the pigments which may be used the following are included: lithopone, barytes, zinc oxide, titanium oxide, chromates, red lead, white lead, malachite green, chrome green, chrome yellow, Prussian blue, etc. Similarly dyes and lakes may be used if desirable.

It is generally preferable to use driers in the preparation of the binders. The drier is usually added to the binder during the oxidation process and if desirable additional drier may be added when the binder, fillers, etc., are mixed together. Suitable driers include the oil-soluble salts such as the naphthenates, resinates and linoleates of cobalt, lead, manganese, zinc and chromium. Only a small proportion of these driers' based on the siccative oil content is generally sumcient,

although larger proportions may be used as expedient. Obviously. various mixtures of driers may be used.

The term "seasoning as applied to linoleum compositions indicates the process of curing by heating or equivalent treatment to polymerize oxidize the composition to a stage wherein the floor covering is sufficiently hard and resistant to abrasion to be suitable for its intended purpose and yet is still suiiiciently flexible to permit the usual bending and rolling required of llineigemn. The term "maturing" is similarly iron oxide,

' I have found that only a small proportion of formoguanamine is generally suflicient, e. g., (Ll-5% of the siccative composition but obviously' smaller or larger proportions may be used it desirable. In some instances, the alkali resistance may be improved somewhat by the use of formoguanamine.

My accelerator is preferably added mixing of the binder with the fillers, though it may be added before or during the oxidation of the-binder. If my acceleratoris added before or during the oxidation, it may inhibit somewhat the gelation of the siccative binder. It is to be noted, however, that after gelation, my accelerator speeds up the curing of the siccative composition.

Obviously many modifications in the processes and compositions described above may be made without departing from the spirit and scope of the invention as defined in the appended claim.

I claim:

In a process of curing a surface covering composition including a-siccative material selected from the group consisting of drying oils and drying oil modified polyhvdric alcohol-polybasic acid resins, the step which comprises adding to such a composition formoguanamine.

during the nomm G. rims.

etc., aiv