Compositions: coating or plastic – Coating or plastic compositions – Corrosion inhibiting coating composition
Reexamination Certificate
2000-08-10
2001-11-06
Green, Anthony (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Corrosion inhibiting coating composition
C106S014220, C106S014230, C106S014240, C106S014270, C106S014290, C106S014340, C106S014410, C106S014430, C106S014440
Reexamination Certificate
active
06312509
ABSTRACT:
FIELD OF THE INVENTION
Micro-crystalline wax-based rust-preventive products and a method for making them.
BACKGROUND
U.S. Pat. No. 3,754,942 relates to a coating for preventing rust and corrosion on metallic surfaces. The compositions disclosed therein were the starting point for developing vastly enhanced products suitable for application to all metallic, wood and concrete-based surfaces and structures.
SUMMARY OF THE INVENTION
Entirely asphaltic, micro-crystalline wax- and aluminum-based coating compositions are fully flexible and accommodate any expansion or contraction in steel structures.
An object of the present invention is to provide a protective coating composition that is applicable to surfaces of various materials with minimal surface preparation; no sandblasting, sealing or priming is required.
Another object of the present invention is to provide a coating composition that will pass 1200 hours of ASTM B-117 salt spray tests and 4000 hours of QUV Weatherometer ASTM G-53 tests.
A further object of the, present invention is to provide a coating composition which is exempted from VOC (Volatile Organic Compound) requirements in many states.
A still further object of the present invention is to provide a coating composition which has UV resistance and provides protection against salt and chemical environments, such as acid, chlorine and ammonia.
Yet an additional object of the present invention is to provide a coating composition which can be applied directly over a rusted or painted surface.
Still another object of the present invention is to provide a coating composition with extreme flexibility without cracking, chipping, flaking or peeling.
The products of the present invention achieve the noted objectives by being extremely resistant to chemical, salt and corrosive environments. They bend without cracking, chipping, peeling or flaking. Further, they are resistant to UV fight up to 4000 hours under QUV Weatherometer ASTM G-53 testing standards. In addition, they are effective against salt spray up to 1200 hours, and they can be applied in one step, which does not require prior sandblasting, priming or sealing. Other objects will be apparent from the following description.
DETAILED DESCRIPTION
Coating compositions in accordance with the present invention are prepared from a number of different ingredients which contribute to the various properties of the end products. As the obtained coating compositions cure in situ after they are applied, reaction between or among components is contemplated.
Although only preferred embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its scope to the embodiments set forth in the following description. The invention is capable of other embodiments and of being practiced or carried out in various ways. Also, in describing the preferred embodiments, specific terminology will be resorted to for the sake of clarity. It is to be understood that each specific term includes all technical equivalents which operate in a similar manner to accomplish a similar purpose.
The ingredients employed for formulating the coating compositions of the present invention are set forth below in Table I:
TABLE I
a)
microcrystalline wax, e.g. IGI Microsere 5714 Wax and M160,
b)
naphthenic and paraffinic oils, e.g. HTCR 45 process oil (manu-
factured from wax-free crude, non-staining, has great resistance to
heat and UV light), Sunpar and Circosol 304,
c)
oil-soluble alkali-metal sulfonate, e.g. Petrosul 750 (sodium
petroleum sulfonate),
d)
uintaite (pulverized gilsonite),
e)
boiled linseed oil,
f)
naphthenic acid - a naturally occurring, complex mixture of high
molecular weight cycloaliphatic carboxylic acids recovered from
petroleum distillates, e.g. Sunaptic acid, Shellflex 680
g)
solvent, e.g. mineral spirit, Vista LPA 210, corn solvent (ethyl
lactate), soy solvent (mixed fatty acid methyl esters),
Hi-Sol 10 and Vansol 53,
h)
a body builder which is a 100% cationic salt functioning as a vis-
cosity modifier, e.g. PA-14 (isodecyloxypropyl amine),
i)
aluminum paste (leafing or non-leafing),
j)
a gel grade of attapulgite, e.g. Attagel 20 (hydrous magnesium
aluminum silicate) and Min-U-Gel ® FG,
k)
emulsifier, e.g. Redikote (emulsifier for medium-setting asphalt
emulsions and co-emulsifier for quick-set slurry and microsurfacing
emulsions),
l)
grey fibrous powder, biodegradable, non-hazardous, and non-toxic -
will disperse in water with agitation, e.g. Interfibe ™ FT
(medium length milled cellulose fiber),
m)
a dry ground muscovite mica product of platelet shape and high
aspect ratio, e.g. AFLAKE 805 (potassium aluminum silicate) and
Mica 805F,
n)
silica gel desiccant, e.g. Syloid ® AL-1,
o)
UV-resistant pigment, e.g. Levanyl (Green G-LF, Blue G-LF, Yellow
5GX-LF and Red BB-LF),
p)
dispersion of butyl rubber or polyisobutylene in paraffin or micro-
crystalline wax, e.g. Keywax rubber concentrate.
Components (h), (i) and (l) to (p) are optional insofar as they are not essential to all contemplated coating compositions, although a number of them are essential to one or more such compositions. The UV protective pigment, e.g., is a significant component for coating compositions contemplated for outdoor use.
The relative proportion of the respective components is a significant factor. The overall weight percentage ranges for each of the components (when present) is as follows with each letter corresponding to the ingredient, listed under the same letter in Table I above:
(a) 5 to 60 (preferably 5 to 15);
(b) 0.02 to 25 (preferably 0.02 to 5);
(c) 0.05 to 20 (preferably 0.05 to 5);
(d) 10 to 50 (preferably 10 to 30);
(e) 1 to 25 (preferably 1 to 10);
(f) 0.5 to 5 (preferably 0.8 to 3.5);
(g) 15 to 70 (preferably 35 to 65);
(h) 0.05 to 12 (preferably 0.25 to 2);
(i) 10 to 35 (preferably 10 to 20);
(j) 1 to 18 (preferably 1.5 to 8);
(k) 1 to 12 (preferably 3 to 10);
(l) 1 to 30 (preferably 1 to 10);
(m) 2 to 27 (preferably 4 to 15);
(n) 0.5 to 17 (preferably 0.5 to 8);
(o) 2 to 35 (preferably 5 to 20); and
(p) {this component is optionally used in combination with (a) and in an amount up to four times that of (a), with the combined amount not exceeding 60 weight percent; e.g. 20% mico-crystalline wax and 80% Keywax rubber concentrate, 30% micro-crystalline wax and 70% Keywax rubber concentrate, and 50% micro-crystalline wax and 50% Keywax rubber concentrate (the latter percentages being based on the total weight of both components)}.
Special Ingredients
Vista LPA 210 (product of CONDEA Vista Company) is 100% LVP-VOC (low vapor pressure-volatile organic compound) exempted from VOC laws in many states, and improves the flashpoint of the product to 226° F. It is a drying oil which is primarily a slow-drying solvent blend of iso- and cyclo-paraffins without benzene, toluene, ethylbenzene or xylene.
Optional alternative solvents include: i) Mixture of soybean solvent and corn oil solvent; ratio: 50/50, 20/80, 30/70; 10/90; ii) Straight mineral spirit solvent 100%; iii) Straight corn oil solvent 100%; iv) 80% corn oil, 20% mineral spirit; v) Soygold 1000—methylated seed oil (product of AG Environmental Products L.L.C.) has passed the South Coast Quality Management District testing and is designated a clean air solvent; vi) Soysolv®—methyl ester of soya oil (product of Soysolv®), soybean solvent; vii) Soysolv® Cornsolv—ethyl lactate (product of Soysolv®), corn oil solvent.
Keywax rubber concentrate (product of Key Polymer) is dispersion of butyl rubber or polyisobutylene in paraffin or microcrystalline wax.
PA-14 (product of Tomah™ Products, Inc.) is a body builder which is a 100% cationic salt (isodecyloxypropyl amine) functioning as a viscosity modifier. It improves product sealing ability.
Attagel 20 (product of Engelhard Corporation) is a gel grade of attapulgite, similar to Min-U-Gel; used in admixture with RediKote (E-9A, 75TX and/or E-5, individually or in any combination). Attagel 20 acts as a thickener, suspension agent and bonder to improve bonding, quicken coating curing,
Green Anthony
Jacobson & Holman PLLC
LandOfFree
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