Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L9/00—Disinfection, sterilisation or deodorisation of air
  • A61L9/01—Deodorant compositions
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
  • B65F1/00—Refuse receptacles; Accessories therefor
  • B65F1/0006—Flexible refuse receptables, e.g. bags, sacks
  • B65F1/0026—Flexible refuse receptables, e.g. bags, sacks with odor controlling substances
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
  • C11B9/00—Essential oils; Perfumes
  • C11B9/0007—Aliphatic compounds
  • C11B9/0015—Aliphatic compounds containing oxygen as the only heteroatom
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
  • C11B9/00—Essential oils; Perfumes
  • C11B9/0007—Aliphatic compounds
  • C11B9/0015—Aliphatic compounds containing oxygen as the only heteroatom
  • C11B9/0019—Aliphatic compounds containing oxygen as the only heteroatom carbocylic acids; Salts or esters thereof
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
  • C11B9/00—Essential oils; Perfumes
  • C11B9/0042—Essential oils; Perfumes compounds containing condensed hydrocarbon rings
  • C11B9/0046—Essential oils; Perfumes compounds containing condensed hydrocarbon rings containing only two condensed rings
  • C11B9/0049—Essential oils; Perfumes compounds containing condensed hydrocarbon rings containing only two condensed rings the condensed rings sharing two common C atoms
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
  • C11B9/00—Essential oils; Perfumes
  • C11B9/0061—Essential oils; Perfumes compounds containing a six-membered aromatic ring not condensed with another ring

Definitions

• the present invention relates to unscented and low scented malodor control compositions and methods thereof.
• the malodor control compositions are suitable for use in a variety of applications, including use in air freshening composition and on plastic films for garbage bags.
• Products for controlling malodors are well known in the art and are widely described in patent literature. These products may be designed to work specifically in air, on fabrics, or with plastic films. See, e.g. , U.S. Patent Publication Nos. 2009/0326093 and 2009/0067760.
• Unscented or low scented products are desired by consumers as they may be considered more natural and discreet to use than scented products.
• Manufacturers of unscented or low scented products for controlling malodors rely on malodor control ingredients or other technologies (e.g. filters) to reduce malodors.
• malodor control ingredients or other technologies e.g. filters
• effectively controlling both amine-based malodors (e.g fish and urine) and sulfur-based malodors (e.g. garlic and onion) may be difficult, and the time required for a product to noticeably reduce malodors may create consumer doubt as to the product's efficacy on malodors.
• manufacturers incorporate scented perfumes to help mask these difficult malodors.
• a malodor control composition comprising a perfume mixture comprising an effective amount of benzophenone, methyl palmitate, farnesol, vetivert acetate, and undecylenic aldehyde for reducing malodors.
• a malodor control composition comprising a perfume mixture comprising about 30% to about 100%, by weight of said perfume mixture, of benzophenone, methyl palmitate, farnesol, and mixtures thereof.
• a plastic film comprising a perfume mixture comprising an effective amount of at least 2 perfume ingredients selected from the group consisting of: benzophenone, undecylenic aldehyde, methyl palmitate, vetivert acetate, farnesol, and mixtures thereof, wherein said perfume mixture reduces malodors in the air.
• a malodor control composition comprising a perfume mixture comprising styrax asphalt and an effective amount of at least one perfume material selected from the group consisting of: benzophenone, undecylenic aldehyde, methyl palmitate, vetivert acetate, farnesol, and mixtures thereof, wherein said perfume mixture reduces malodors.
• a method of controlling malodors and providing a low scent composition via providing a malodor control composition comprising a perfume mixture comprising an effective amount of benzophenone, methyl palmitate, farnesol, vetivert acetate, and undecylenic aldehyde; and contacting the malodor control composition with a malodor.
• Fig. 1 is a graph showing butanethiol reduction by thiophene carboxaldehyde in combination with various acid catalysts.
• Fig. 2 is a graph showing scent intensities of varying loads of a malodor control composition, in accordance with the present invention, in trash bags.
• Unscented and low scented malodor control compositions of the present invention comprise perfume mixtures that are substantially free of scent yet control malodors through odor neutralization and odor blocking technologies.
• the perceptible perfume scent intensity and malodor efficacy of a composition can be determined using the tests outlined herein.
• Malodor refers to compounds generally offensive or unpleasant to most people, such as the complex odors associated with bowel movements.
• Netralize or “neutralization” refers to the ability of a compound or product to reduce or eliminate malodorous compounds. Odor neutralization may be partial, affecting only some of the malodorous compounds in a given context, or affecting only part of a malodorous compound. A malodorous compound may be neutralized by chemical reaction resulting in a new chemical entity, by sequestration, by chelation, by association, or by any other interaction rendering the malodorous compound less malodorous or non-malodorous. Neutralization is distinguishable from odor masking or odor blocking by a change in the malodorous compound, as opposed to a change in the ability to perceive the malodor without any corresponding change in the condition 12262-JC
• Malodor neutralization provides a sensory and analytically measurable (e.g. gas chromatograph) malodor reduction.
• gas chromatograph analytically measurable
• Oxidor blocking refers to the ability of a compound to dull the human sense of smell.
• Odor masking refers to the ability of a compound with a non-offensive or pleasant smell that is dosed such that it limits the ability to sense a malodorous compound. Odor-masking may involve the selection of compounds which coordinate with an anticipated malodor to change the perception of the overall scent provided by the combination of odorous compounds.
• the malodor control compositions of the present invention include an unscented or low scented perfume mixture designed to control malodors by neutralization and blocking and not function merely by covering up or masking odors.
• the malodor control composition may also include an acid catalyst for more quickly neutralizing malodors and other optional ingredients for particular applications.
• the malodor control compositions of the present invention may include an unscented or low scented mixture of perfume materials that neutralize and block malodors.
• the unscented or low scented perfume mixture may include benzophenone, farnesol, undecylenic aldehyde, and mixtures thereof.
• Suitable perfume materials may have a vapor pressure (VP) in the range of about 0.0001 torr to 100 torr, alternatively about 0.0001 torr to about 10 torr, alternatively about 0.0001 torr to about 0.100 torr, alternatively about 0.001 torr to about 50 torr, alternatively about 0.001 torr to about 20 torr, alternatively about 0.001 torr to about 0.100 torr, alternatively about 0.001 torr to 0.06 torr, alternatively about 0.001 torr to 0.03 torr, alternatively about 0.005 torr to about 20 torr, alternatively about 0.005 torr to about 0.100 torr, alternatively about 0.01 torr to about 20 torr, alternatively about 0.01 torr to about 15 torr, alternatively about 0.01 torr to about 10 torr, alternatively about 0.05 torr to about 10 torr, measured at 25 °C.
• VP vapor pressure
• the perfume materials of the present invention may be defined by their boiling point
• the octanol/water partition coefficient of a perfume material is the ratio between its equilibrium concentrations in octanol and in water.
• the partition coefficients of the perfume material used in the malodor control composition may more conveniently be given in the form of their logarithm to the base 10, logP.
• the logP values of many perfume materials have been reported. See, e.g., the Pomona 92 database, available from Daylight Chemical Information Systems, Inc. (Daylight CIS), Irvine, California. However, the logP values are most conveniently calculated by the Biobyte ClogP program contained in Daylight Software version 4.94, also available for license from Daylight CIS. This program also lists experimental logP values when they are available in the Pomona92 database.
• ClogP The "calculated logP” (ClogP) is determined by the fragment approach of Hansch and Leo (cf., A. Leo, in Comprehensive Medicinal Chemistry, Vol. 4, C. Hansch, P. G. Sammens, J. B. Taylor and C. A. Ramsden, Eds., p. 295, Pergamon Press, 1990).
• the fragment approach is based on the chemical structure of each perfume material, and takes into account the numbers and types of atoms, the atom connectivity, and chemical bonding.
• the ClogP values which are the most reliable and widely used estimates for this physicochemical property, are preferably used instead of the experimental logP values in the selection of perfume materials for the malodor control composition.
• the ClogP values may be defined by four groups and the perfume materials may be selected from one or more of these groups.
• the first group comprises volatile aldehydes that have a B.P. of about 250 °C or less and ClogP of about 3 or less.
• the second group comprises volatile aldehydes that have a B.P. of 250°C or less and ClogP of 3.0 or more.
• the third group comprises volatile aldehydes that have a B.P. of 250°C or more and ClogP of 3.0 or less.
• the fourth group comprises volatile aldehydes that have a B.P. of 250°C or more and ClogP of 3.0 or more.
• the malodor control composition may comprise any combination of volatile aldehydes from one or more of the ClogP groups.
• Suitable perfume materials include Benzophenone, Methyl Palmitate, Farnesol, Vetivert
• perfume materials may also include Helional (alpha-methyl-3,4-(methylenedioxy)- hydrocinnamaldehyde), Florhydral, Undecylenic Aldehyde, Adoxal (2,6,10-Trimethyl-9- undecenal), Bourgeonal (4-t-butylbenzenepropionaldehyde), Cymal, Florhydral (3-(3-isopropyl- phenyl) -butyraldehyde), Citronellal (3,7-dimethyl 6-octenal), Floralozone (para-ethyl- alpha,alpha-dimethyl hydrocinnamaldehyde), Floral Super, Pino Acetaldehyde, Styrax Coeur.
• Suitable perfume materials may also include volatile aldehydes or reactive aldehydes (RA) including, but are not limited to, Lilestralis 33 (2-methyl-4-t-butylphenyl)propanal), 12262-JC
• Suitable volatile aldehydes may also include acetaldehyde (ethanal), pentanal, valeraldehyde, amylaldehyde, Scentenal (octahydro-5-methoxy-4,7-Methano-lH-indene-2- carboxaldehyde), propionaldehyde (propanal), Cyclocitral, beta-cyclocitral, (2,6,6-trimethyl-l- cyclohexene-1 -acetaldehyde), Iso Cyclocitral (2,4,6-trimethyl-3-cyclohexene-l -carboxaldehyde), isobutyraldehyde, butyraldehyde, isovaleraldehyde (3-methyl butyraldehyde), methylbutyraldehyde (2-methyl butyraldehyde, 2-methyl butanal), Dihydrocitronellal (3,7- dimethyl octan
• the malodor control composition includes fast reacting volatile aldehydes.
• Fast reacting volatile aldehydes refers to volatile aldehydes that either (1) reduce amine odors by 20% or more in less than 40 seconds; or (2) reduce thiol odors by 20% or more in less than 30 minutes.
• Fast reacting volatile aldehydes can be identified by the method outlined in the Example outlined herein, titled "Analytical Test - Effect of volatile aldehydes on amine-based and sulfur-based malodors”.
• the unscented or low scented perfume mixture may comprise from about 30% to about
• the perfume mixture may comprise about 35% to about 95%, alternatively about 40%, alternatively about 80%, alternatively about 90%, by weight of said perfume mixture, of benzophenone, methyl palmitate, farnesol, and mixtures thereof.
• Table 1 shows one embodiment of a perfume mixture suitable for the malodor control composition of the present invention.
• Table 2 shows another embodiment of a perfume mixture suitable for the malodor control composition of the present invention.
• Table 3 shows yet another embodiment of a perfume mixture suitable for the malodor control composition of the present invention.
• the malodor control composition includes a mixture of perfume materials identified in Tables 1-3 along with a mixture of two or more volatile aldehydes selected from the group consisting of 2-ethoxy Benzylaldehyde, 2-isopropyl-5-methyl-2-hexenal, 5- methyl Furfural, 5-methyl-thiophene-carboxaldehyde, p-anisaldehyde, Benzylaldehyde,
• the perfume mixture includes the volatile aldehyde mixture shown in Table 4 and referred to herein as Accord A.
• the perfume mixture includes the volatile aldehyde mixture showin in Table 5 and referred to herein as Accord B.
• the perfume mixture includes the volatile aldehyde mixture shown in Table 6 and referred to herein as Accord C.
• Accords A, B, or C can be formulated in with the perfume mixture outlined in Tables 1 to 3 or with any other unscented or low scented perfume materials in an amount of about 5% to about 50%, alternatively about 5% to about 40%, alternatively about 5% to about 30%, alternatively about 5% to about 20%, alternatively about 5% to about 10%, by weight of the perfume mixture.
• the unscented or low scented perfume mixture may be present in an amount up to 100%, by weight of the malodor control composition, alternatively from about 5% to about 100%, 12262-JC
• the present invention may include poly- aldehydes, for example, di-, tri-, tetra-aldehydes.
• Such embodiments may include laundry detergents, additive, and the like for leave-on, through the wash, and rinse-off type of applications.
• the malodor control compositions of the present invention may include an effective amount of an acid catalyst to neutralize sulfur-based malodors. It has been found that certain mild acids have an impact on aldehyde reactivity with thiols in the liquid and vapor phase. It has been found that the reaction between thiol and aldehyde is a catalytic reaction that follows the mechanism of hemiacetal and acetal formation path.
• the present malodor control composition contains an acid catalyst and contacts a sulfur-based malodor, volatile aldehydes react with thiol. This reaction may form a thiol acetal compound, thus, neutralizing the sulfur- based odor. Without an acid catalyst, only hemi-thiol acetal is formed.
• Suitable acid catalysts have a VP, as reported by Scifinder, in the range of about 0.001 torr to about 38 torr, alternatively about 0.001 torr to about 14 torr, alternatively from about 0.001 to about 1, alternatively from about 0.001 to about 0.020, alternatively about 0.005 to about 0.020, alternatively about 0.010 to about 0.020, measured at 25°C,.
• the acid catalyst may be a weak acid.
• a weak acid is characterized by an acid dissociation constant, K a which is an equilibrium constant for the dissociation of a weak acid; the pKa being equal to minus the decimal logarithm of K a.
• the acid catalyst may have a pKa from about 4.0 to about 6.0, alternatively from about 4.3 and 5.7, alternatively from about 4.5 to about 5, alternatively from about 4.7 to about 4.9.
• Suitable acid catalysts include those listed in Table 7.
• an acid catalyst that provides a neutral scent.
• Such acid catalysts may have a VP of about 0.001 torr to about 0.020 torr, measured at 25°C, alternatively about 0.005 torr to about 0.020 torr, alternatively about 0.010 torr to about 0.020 torr.
• Non-limiting examples of such acid catalyst include succinic acid and benzoic acid.
• the malodor control composition may include about 0.05% to about 5%, alternatively about 0.1% to about 1.0%, alternatively about 0.1% to about 0.5%, alternatively about 0.1% to about 0.4%, alternatively about 0.4% to about 1.5%, alternatively about 0.4% of an acid catalyst, by weight of the malodor control composition.
• the present malodor control composition may include about 0.4% of acetic acid (50:50 thiophene carboxaldehye (TC): dipropylene glycol methyl ether (DPM), 0.4% acetic acid).
• TC thiophene carboxaldehye
• DPM dipropylene glycol methyl ether
• the acid catalyst may increase the efficacy of the volatile aldehyde on malodors in comparison to the malodor efficacy of the volatile aldehyde on its own.
• 1% volatile aldehyde and 1.5% benzoic acid provides malodor removal benefit equal to or better than 5% volatile aldehyde alone.
• the malodor control composition may have a pH from about 3 to about 8, alternatively from about 4 to about 7, alternatively from about, alternatively from about 4 to about 6. 12262-JC
• the malodor control composition may, optionally, include odor masking agents and/or diluents.
• Water and surfactants may also be present in any amount for the composition to make an aqueous solution.
• water may be present in an amount of about 85% to 99.5%, alternatively about 90% to about 99.5%, alternatively about 92% to about 99.5%, alternatively about 95%, by weight of said malodor control composition.
• Water containing a small amount of low molecular weight monohydric alcohols, e.g., ethanol, methanol, and isopropanol, or polyols, such as ethylene glycol and propylene glycol, can also be useful.
• the malodor control composition may also comprise 100% of an unscented or low scented perfume mixture according to the present invention.
• Exemplary diluents include DPM, and 3 -methoxy-3 -methyl- 1-butanol, and mixtures thereof. II. Methods of Use
• the malodor control composition of the present invention may be used in a wide variety of applications that neutralize malodors in the vapor and/or liquid phase.
• the malodor control composition may be formulated for use in non-energized vapor phase systems.
• "Non-energized" as used herein refers to a system that emits a targeted active passively or without the need for an electrical energy source. Aerosol sprayers and traditional trigger/pump sprayers are considered non-energized systems.
• the VP of the volatile aldehydes may be about 0.01 torr to about 20 torr, alternatively about 0.05 torr to about 10 torr, measured at 25°C.
• Non-limiting examples of a non-energized vapor phase system are passive air freshening diffusers such as those known by the trade name Renuzit® Crystal Elements; and aerosol sprays such as fabric and air freshening sprays and body deodorants.
• the malodor control composition may be formulated for use in a liquid phase system.
• the VP may be about 0 torr to about 20 torr, alternatively about 0.0001 torr to about 10 torr, measured at 25°C.
• Non-limiting examples of a liquid phase system are liquid laundry products, such as laundry detergents and additives; dish detergents; personal hygiene products such as body washes, shampoos, conditioners.
• the malodor control composition may also be loaded onto or into known substrates according to known methods.
• Suitable substrates may include wovens and non-wovens (e.g cellulose fibers for paper products, sponges, and the like). Such substrates may be used to 12262-JC
• diapers manufacture diapers; baby wipes; adult incontinence products; feminine hygiene products such as sanitary napkins and tampons; cleaning wands for toilets; pet food packaging; paper towels; facial tissues; and the like.
• Suitable substrates may also include commercially available films including low density polyethylene (LDPE), linear LDPE (LLDPE), high density polyethylene, plastomers, elastomers, ethylene vinyl acetate, ethyl methacrylates, polymethylpentene copolymers, polyisobutylenes, polyolefin isomers, cyclic olefin copolymers, polyethylene, polypropylene, poly lactic acid based films, polyhydroxy alcohol based films, polyhydroxy butyrate/valerate, polyesters, thermoplastic starch, and combinations thereof.
• These plastic films may be used to manufacture non- disposable composting containers, trash bags, storage bags, and the like.
• the malodor control composition may also be used in connection with commercial or industrial septic tanks or sewage treatment equipment.
• Malodor standards are prepared by pipeting 1 mL of n-butylamine (amine-based malodor) or 1-butanethiol (sulfur-based malodor) into a 1.2 liter gas sampling bag. The bag is then filled to volume with nitrogen and allowed to sit for at least 12 hours to equilibrate.
• a 1 ⁇ sample of each volatile aldehyde listed in Table 9 and of each Accord (A, B, and C) listed in Tables 4 to 6 is pipeted into individual 10 mL silanized headspace vials.
• the vials are sealed and allowed to equilibrate for at least 12 hours. Repeat 4 times for each sample (2 for butylamine analysis and 2 for butanethiol analysis).
• the target malodor standard is injected into each 10 mL vial.
• the vials containing a sample +malodor standard are held at room temperature for 30 minutes.
• a 1 mL headspace syringe is then used to inject 250 ⁇ ⁇ of each sample/thiol malodor into a GC/MS split/splitless inlet.
• a 1 mL headspace syringe is used to inject 500 ⁇ ⁇ of each sample/amine malodor immediately into the GC/MS split/splitless inlet.
• a GC pillow is used for the amine analysis to shorten the run times.
• Samples are then analyzed using a GC/MS with a DB-5, 20 m, 1 ⁇ film thickness column with an MPS-2 autosampler equipment with static headspace function. Data is analyzed by ion extraction on each total ion current (56 for thiol and 30 for amine) and the area is used to calculate the percent reduction from the malodor standard for each sample.
• Table 9 shows the effect of certain volatile aldehydes on neutralizing amine-based and sulfur based malodors at 40 seconds and 30 minutes, respectively.
• Table 10 shows the percent reduction of butylamine and butaniethiol at 40 seconds and 30 minutes, respectively, for Accords A, B, and C.
• Fig. 1 demonstrates that low vapor pressure acid catalysts provide up to 3 times better reduction of sulfur-based malodors in comparison to the control.
• Tables 11 and 12 show that a perfume mixture having as little as 1% volatile aldehyde along with 1.5% acid catalyst performs better at reducing butylamine and butanethiol than the same perfume mixture having 5% volatile aldehyde.
• TOA Technical Olfactive Assessments were conducted using passive dispenser devices for the malodor control composition (MCC) perfume oils. Malodors used were either garlic or Ocean Perch fish. Perfume oils tested were "Test MCC” and "Control MCC” as shown in Table 13.
• the passive dispenser devices were open, circular containers. Different device diameters were used as outlined in Table 14 in order to achieve approximately the same perfume % weight loss rate for the Test and Control MCCs. This is consistent with the molecular diffusion principles outlined on pages 22-34 in the text, Mass Transfer Operations, third edition, by Robert E. Treybal.
• Test and Control passive dispenser devices with sufficient Test MCC, shown in Table 13, to ensure surface area remains wet throughout test. 5 minutes before cooked garlic is introduced to the test chambers, place each passive dispenser device into individual test chambers on the opposite side of the fan.
• Each test chamber is 39.25 inches wide, by 25 inches deep, by 21.5 inches high with a volume of 12.2 cubic feet (0.34 cubic meters).
• the test chamber can be purchased from Electro-Tech Systems, Glenside, PA.
• Each test chamber is equipped with a fan (Newark catalog #70K9932, 115 VAC, 90CFM) purchased from Newark Electronics, Chicago, IL.
• trained evaluators open each chamber, smell the chamber for odor intensity, and assign a score for Malodor Intensity, based on the scale in Table 15.
• the trained evaluator smells the same chamber for perfume scent intensity, and assigns a score for scent intensity, based on the scale in Table 15.
• the chamber door is closed between sequential evaluators. The scores are tabulated and the average malodor intensity and scent intensity scores for each time interval are recorded.
• Table 16 demonstrates that the unscented or low scented MCC test mixture according to the present invention provides similar malodor control as the Control MCC perfume mixture but, notably, has less perfume scent intensity.
• a patty suitable to fit into a 60 x 15 mm Petri dish Repeat 2 more times so there is one fish patty in each of 3 Petri dishes.
• Test and Control passive dispenser devices with sufficient Test MCC, shown in Table 13, to ensure surface area remains wet throughout test. 5 minutes before cooked ocean perch is introduced to the test chambers, place each passive dispenser device into individual test chambers on the opposite side of the fan.
• test chamber will not contain a passive dispenser device.
• the specifications of the test chamber are the same as those in the above sulfur-based (i.e. garlic) malodor test. Remove the lids to expose contents for a dwell time sufficient to provide an initial odor intensity grade of 70-80 (about 2 minutes). Once the initial odor intensity grade has been reached in a test chamber, remove the Petri dish from the test chamber.
• trained evaluators open each chamber, smell the chamber for odor intensity, and assign a score for malodor intensity, based on the scale in Table 15.
• the trained evaluator smells the same chamber for scent intensity, and assigns a score for scent intensity, based on the scale in Table 15.
• the chamber door is closed between sequential evaluators. The scores are tabulated and the average malodor intensity and scent intensity scores for each time interval are recorded.
• Table 17 demonstrates that the unscented or low scented perfume mixture according to the present invention provides similar malodor control as the Control perfume mixture but, notably, has less perfume scent intensity.
• the Test MCC formula listed in Table 13 is loaded into plastic trash bag film, according to known methods, at a target loading level.
• a trained evaluator is given a folded trash bag sample containing the composition at the target loading level.
• the evaluator grasps the sample with both hands, one hand grabbing each side edge of the bag opening.
• Evaluator proceeds to open the bag sample by unfolding it, and then shaking it up and down until the bag has been fully opened. Once opened, the evaluator places the opened bag into a clean, appropriate size trash can (e.g. a tall kitchen trash can) and folds the top edge of the open bag over the outer lip of the trash can to secure the bag in place.
• a clean, appropriate size trash can e.g. a tall kitchen trash can
• the evaluator bends down over the trash can and places both arms down into the opened sample until their nose is directly above the opening of the bag and can.
• the evaluator then moves their arms around inside the bag, stirring up the airspace and keeping their nose in the same area above the bag opening (as if the evaluator were trying to get the air out between the side walls of the bag and the sides of the trash can).
• the evaluator takes one or more sniffs of the bag headspace air while in this position and performing this step.
• the evaluator stands up and steps away from the can, and evaluates the intensity of the scent of the Test MCC in the bag following the scale on Table 15.
• Test MCC loading level is to be evaluated.
• Evaluator is to allow at least 10 minutes between sample evaluations to clear his/her nose of any residual scent from the previous sample.
• Table 18 and Fig. 2 show that the perfume intensity rating surprisingly increases less than the incremental increase in the Test MCC loading level seen between 5 and 30 mg.

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