Compositions: coating or plastic – Coating or plastic compositions – Hydrocarbon containing
Reexamination Certificate
2000-03-31
2002-10-08
Brunsman, David (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Hydrocarbon containing
C106S273100, C585S002000, C585S003000
Reexamination Certificate
active
06461421
ABSTRACT:
TECHNICAL FIELD
This invention relates to hydrocarbonaceous compositions containing odor suppressants, and, more particularly; to a composition comprised of an odor-emitting hydrocarbonaceous material and an odor-suppressing amount of a mixture of an aldehyde or a ketone and a carboxylic acid ester.
BACKGROUND OF THE INVENTION
The need for odor reduction in hydrocarbonaceous materials such as asphalt, middle distillate fuels, and the like, is well known. To date no satisfactory solution to this problem is commercially available.
U.S. Pat. No. 5,271,767 discloses an odor-free hot-mix asphalt composition which consists essentially of liquid asphalt, or a hot-mix asphalt or a hot mix, cold lay asphalt, or a rubberized hot mix asphalt or a hot mix asphalt with added latex, containing an effective amount of an additive comprising a citrus terpene (4-isopropyl-1-methylcyclohexene) D-limonene mixed with a vegetable oil such as cottonseed oil, soya oil, rapeseed (canola) oil, peanut oil, corn oil, sunflower oil, palm oil, coconut oil, and palm kernal oil. etc., and an effective amount of a silicone oil dispersant. The reference indicates that a preferred additive composition consists essentially of 10-15 parts citrus terpene (D-limonene) and 85-90 parts vegetable oil, and an effective amount up to about 2 parts silicone oil, the parts in the composition totaling 100. The reference also indicates that when 0.5-1.0 parts of this composition are mixed with 99.0-99.5 parts liquid asphalt the resulting liquid asphalt composition is substantially free of characteristic asphalt odors, and other objectionable odors. The reference indicates that when 4-8 parts of the mixture are mixed with 99-96 parts of aggregate, the resulting hot-mix asphalt composition is substantially free of characteristic asphalt odor, and other objectionable odors. The reference indicates that hot-mix asphalt plants are also free of characteristic asphalt odor, and other objectionable odors.
SUMMARY OF THE INVENTION
This invention relates to a composition, comprising: (A) an odor-emitting hydrocarbonaceous material; and (B) an odor-suppressing amount of an aldehyde or a ketone, and a carboxylic acid ester. The odor-emitting hydrocarbonaceous material may be any hydrocarbonaceous material that emits an objectionable or undesirable odor. In one embodiment, the odor-emitting hydrocarbonaceous material is an asphalt. In one embodiment, it is a middle distillate fuel.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The odor-emitting hydrocarbonaceous material may be any hydrocarbonaceous material that emits at ambient temperatures or elevated temperatures undesirable or objectionable odors. These hydrocarbonaceous materials may be based on one or more natural oils, synthetic oils, or a combination thereof. The hydrocarbonaceous materials may contain one or more volatile (at ambient or elevated temperatures) components such as aliphatic or aromatic hydrocarbons (e.g., methane, ethane, propane, one or more butanes, pentanes, hexanes, benzene, and the like).
The natural oils include animal oils and vegetable oils (e.g., castor oil, lard oil) as well as mineral oils such as liquid petroleum oils and solvent treated or acid-treated mineral oils of the paraffinic, naphthenic or mixed paraffinic—naphthenic types. Oils derived from coal or shale are included. Synthetic oils include hydrocarbon oils such as polymerized olefins, alkylbenzenes, polyphenyls, alkylated diphenyl ethers and alkylated diphenyl sulfides. Synthetic oils include alkylene oxide polymers, esters of dicarboxylic acids, silicon-based oils, and the like.
Unrefined, refined and rerefined oils, either natural or synthetic (as well as mixtures of two or more of any of these) of the type disclosed herein above are included. Unrefined oils are those obtained directly from a natural or synthetic source without further purification treatment. For example, a shale oil obtained directly from retorting operations, a petroleum oil obtained directly from primary distillation or ester oil obtained directly from an esterification process and used without further treatment would be an unrefined oil. Refined oils are similar to the unrefined oils except they have been further treated in one or more purification steps to improve one or more properties. Many such purification techniques are known to those skilled in the art such as solvent extraction, secondary distillation, acid or base extraction, filtration, percolation, etc. Rerefined oils are obtained by processes similar to those used to obtain refined oils applied to refined oils which have been already used in service. Such rerefined oils are also known as recycled, reclaimed or reprocessed oils and often are additionally processed by techniques directed to removal of spent additives and oil breakdown products.
The term “asphalt” as used herein refers to any of a variety of solid or semi-solid materials at room temperature which gradually liquify when heated, and in which the predominant constituents are naturally occurring bitumens of which are obtained as residue in petroleum refining. Asphalt is further defined by Kirk-Othmer, Encyclopedia of Chemical Technology, Vol. 3, Third Ed. (1978) pp. 284-327, John Wiley & Sons, New York. An additional discussion appears in the publication entitled “A Brief Introduction to Asphalt and some of its Uses”, Manual Series No. 5 (MS-5), The Asphalt Institute, 7th Ed., September, 1974. Both of these references are incorporated herein by reference.
The asphalts which may be treated in accordance with this invention include natural asphalts and petroleum asphalts which are generally known for roofing and paving applications. The natural asphalts include, for example, asphaltite such as gilsonite, grahamite and glance pitch; lake asphalt such as trinidad asphalt; and rock asphalt. The petroleum asphalts include straight asphalt obtained by distillation of a crude oil (unblown and substantially unoxidized), blown asphalt produced by blowing an oxygen-containing gas into a straight asphalt in the presence or absence of a catalyst, solvent-extracted asphalt obtained when asphaltic material is separated from the petroleum fraction containing it by the use of propane or other solvents, and cut-back asphalt which is a mixture of straight asphalt and a light petroleum solvent. The asphalts include petroleum tar and asphalt cement. The petroleum tars include oil gas tar obtained as a by-product when gases are produced from petroleum fractions, such tar in refined form, cut-back tar obtained by mixing a light petroleum fraction with such tar, and tar -pitch obtained as a residue by removing the volatile fraction from such tar. Any of these kinds of asphalt may be used singly or jointly. Straight asphalt is useful for paving applications, and oxidized and blown asphalts are useful for roofing applications.
The asphalt cements that are useful may be characterized by a penetration (PEN, measured in tenths of a millimeter, dmm) of less than 400 at 25° C., and a typical penetration is between 40 and 300 (ASTM Standard, Method D-5). The viscosity of asphalt cement at 60° C. is typically more than about 65 poise.
Asphalt cements are often defined in terms specified by the American Association of State Highway Transportation Officials (AASHTO) AR viscosity system. Two sets of typical specifications are as follows:
TEST
AC 2.5
AC 5
AC 10
AC 20
AC 30
AC 40
Viscosity @
250 ±
500 ±
1000 ±
2000 ±
3000 ±
4000 ±
140°F., poise
50
100
200
400
600
800
(AASHTO
T-202)
Viscosity @
125
175
250
300
350
400
275°F., cSt,
minimum
(AASHTO
T-201)
Pen. @ 77°
220
140
80
60
50
40
minimum
(AASHTO
T-49)
Flash Point,
325
350
425
450
450
450
COC
Minimum
° F.
Ductility
100
100
75
50
40
25
After TFOT
(AASHTO
T-179) @
77° F.,
5 CM/MIN,
minimum
Viscosity
1000
2000
4000
8000
12000
16000
After TFOT
(AASHTO
T-179) @
140° F.,
poise,
minimum
AR1000
AR2000
AR4000
Brunsman David
Renner , Otto, Boisselle & Sklar, LLP
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