Hot melt compositions including cucurbiturils

Abstract

The invention features a hot melt composition including from 5% by weight to 50% by weight of a thermoplastic polymer, from 10% by weight to 70% by weight of a tackifying agent, from 5% by weight to 45% by weight of a plasticizer, and from 0.5% by weight to 10% by weight of cucurbituril.

Description

[0001]

[0002] HOT MELT COMPOSITIONS INCLUDING CUCURBITURILS

[0003] CROSS REFERENCE TO RELATED APPLICATIONS

[0004] This application claims the benefit of U.S. Provisional Application No. 63 / 721,852, filed November 18, 2024, which is incorporated herein.

[0005] BACKGROUND

[0006] Hot melt compositions are often used to bond substrates together to maintain the two substrates in a fixed relation to each other or to contribute to the integrity and functionality of the finished article. In the area of industrial adhesives, hot melt compositions are commonly used to bond together or to contribute to the integrity and functionality of a wide variety of articles including packaging materials (e.g., cases and cartons) and disposable absorbent articles including non-woven substrates e.g., adult incontinence products, disposable diapers, sanitary napkins, bed pads, puppy pads, medical dressings, etc.

[0007] There can be multiple hot melt compositions used in the manufacture of disposable absorbent articles. For example, in the manufacture of a disposable diaper, hot melt compositions are used as construction adhesives (e.g. bonding the back sheet to the nonwoven and optionally the absorbent pad), as elastic attachment adhesives (e g. bonding the elastic material to the back sheet in for example the leg or waist area), for core stabilization (e.g. applying a hot melt composition to the absorbent core to increase the strength of the core), for positioning, i.e. used on used on disposable absorbent (e.g., feminine hygiene) articles to position the article on a substrate (e g., undergarment) and as an elastic material to provide stretch properties to the disposable absorbent article

[0008] In addition to functioning as an adhesive, it would be helpful if the hot melt composition could perform an additional function such as for example reducing malodors. SUMMARY

[0009] In one aspect, the invention features a hot melt composition including from 5% by weight to 50% by weight of a thermoplastic polymer, from 10% by weight to 70% by weight of a tackifying agent, from 5% by weight to 45% by weight of a plasticizer, and from 0.5% by¬ weight to 10% by weight of one or more cucurbituril.

[0010] In another aspect, the invention features a hot melt composition including from 5% by weight to 40% by weight of a thermoplastic polymer, from 20% by weight to 70% by weight of a tackifying agent, from 5% by weight to 40% by weight of a plasticizer, and from 0.5% by weight to 7% by weight of one or more cucurbituril.

[0011] In one embodiment, the hot melt composition has a Brookfield Viscosity of from 100 cP to 15,000 cP when tested at 149°C. In a different embodiment, the cucurbituril has an average particle size D (90) of from 2 pm to 20 pm, or even from 5 pm to 15 pm

[0012] In one embodiment, the hot melt composition is a hot melt adhesive composition. In another embodiment, the cucurbituril is a blend of cucurbiturils. In a different embodiment, the cucurbituril is selected from the group consisting of cucurbit[5]uril, cucurbit[6]uril, cucurbit[7]uril, cucurbit[8]uril and combinations thereof. In a different embodiment, the cucurbituril is present at from 0.5% by weight to 5% by weight.

[0013] In one embodiment, the cucurbituril is added to the hot melt composition as a pre-mix. In a different embodiment, the pre-mix comprises plasticizer and one or more cucurbiturils. In another embodiment, the plasticizer is an oil. In a different embodiment, the pre-mix includes from 10% by weight to 50% by weight of the one or more cucurbiturils and from 90% by weight to 50% by weight of the plasticizer.

[0014] In one embodiment, the hot melt composition includes a fragrance. In a different embodiment, hot melt composition further comprises an additional odor reducing compound. In another embodiment, the additional odor reducing compound is a zeolite.

[0015] In another embodiment, the tackifying agent is a hydrogenated hydrocarbon resin and the polymer is selected from the group consisting of styrenic block copolymers, olefin polymers, functionalized versions thereof and combinations thereof. In a different embodiment, the tackifying agent is a hydrogenated hydrocarbon resin and the polymer is selected from the group consisting of olefin polymers, functionalized versions thereof and combinations thereof. In one aspect, the hot melt composition includes from 10% by weight to 35% by weight of a thermoplastic polymer selected from the group consisting of olefin polymers, functionalized versions thereof and combinations thereof, from 25% by weight to 70% by weight of a tackifying agent consisting of a hydrogenated hydrocarbon resin, from 15% by weight to 45% by weight of a plasticizer, and from 2% by weight to 10% by weight of one or more cucurbituril.

[0016] In a different embodiment, a disposable absorbent article includes the hot melt composition. In another embodiment, the disposable absorbent article is selected from the group consisting of disposable diaper, adult incontinence product, sanitary napkin, medical dressing, wearable medical device, bandage, surgical pad, pet training pad and meat¬ packing product. In one embodiment, the disposable absorbent article is selected from the group consisting of disposable diaper, adult incontinence product and sanitary napkin.

[0017] In another embodiment, the invention features a disposable absorbent article including a first substrate, a second substrate, and the hot melt composition, wherein the hot melt composition is applied to at least one of the first and second substrates.

[0018] In one embodiment at least one of the first and second substrates also includes one or more cucurbituril. In a different embodiment, the first and second substrates are selected from the group consisting of nonwoven, film, absorbent material and combinations thereof.

[0019] In another embodiment, the invention features a disposable absorbent article including a first nonwoven substrate, a second nonwoven substrate, and the hot melt composition of any of the proceeding claims, wherein the hot melt composition is present as a continuous coating and is located between the first nonwoven substrate and the second nonwoven substrate.

[0020] In another embodiment, the disposable absorbent article is selected from the group consisting of an incontinence product and a feminine hygiene article.

[0021] In another aspect, the invention features a method of decreasing the malodor content of a disposable absorbent article including the following steps: obtaining a hot melt composition comprising a polymer, a tackifying agent, and one or more cucurbiturils, and applying the hot melt composition onto the disposable absorbent article

[0022] In another embodiment, in the method of decreasing the malodor content of a disposable absorbent article, the hot melt composition is used for an application selected from the group consisting of construction, core and core-wrap The hot melt compositions of this invention can serve as an adhesive for at least one application in a disposable absorbent article and in addition can improve the odor of the article by capturing malodor compounds due to the hot melt composition, other components of the article (e.g nonwoven, film, core materials, elastics, etc ), or materials absorbed by the article when in use (e.g, odors from humans or pets e.g. urine, sweat, body odors, feces, wounds, menstrual secretions, etc.).

[0023] Alternatively, the hot melt composition could be used as a carrier to coat the cucurbiturils on to a disposable absorbent article.

[0024] DETAILED DESCRIPTION

[0025] The term “malodor” means for the purpose of this invention an unpleasant or unwanted odor.

[0026] HOT MELT COMPOSITION

[0027] The inventive compositions are hot melt compositions. Hot melt compositions are applied molten, at an elevated temperature (e.g., 100°C - 170°) and gain strength as they cool. The inventive compositions can be hot melt adhesive compositions, or even hot melt pressure sensitive adhesive compositions. The hot melt composition includes one or more cucurbiturils. The cucurbiturils can be blended into the hot melt composition and can result in a stable composition that can limit mal odors in addition to functioning as an adhesive.

[0028] Alternatively, the hot melt composition could be used as a carrier to coat the cucurbiturils onto a disposable absorbent article.

[0029] The hot melt composition can include from 5% by weight to 50% by weight of a thermoplastic polymer, from 10% by weight to 70% by weight of a tackifying agent, and from 0.5% by weight to 20% by weight of one or more cucurbituril.

[0030] The hot melt composition can include from 5% by weight to 50% by weight of a thermoplastic polymer, from 10% by weight to 70% by weight of a tackifying agent, from 5% by weight to 45% by weight of a plasticizer, and from 2% by weight to 15% by weight of one or more cucurbituril.

[0031] The hot melt composition can include from 5% by weight to 50% by weight of a thermoplastic polymer, from 10% by weight to 70% by weight of a tackifying agent, from 5% by weight to 45% by weight of a plasticizer, and from 0.5% by weight to 10% by weight of cucurbituril.

[0032] A hot melt composition can include from 10% by weight to 35% by weight of a thermoplastic polymer selected from the group consisting of olefin polymers, functionalized versions thereof and combinations thereof, from 25% by weight to 70% by weight of a tackifying agent consisting of a hydrogenated hydrocarbon resin, from 15% by weight to 45% by weight of a plasticizer, and from 2% by weight to 10% by weight of one or more cucurbituril.

[0033] The hot melt composition can have a Brookfield Viscosity of no greater than 20,000 centipoise (cP), no greater than 15,000 cP, no greater than 10,000 cP, from 100 cP to 20,000 cP, or even from 100 cP to 15,000 cP at 149°C, or even at 121°C.

[0034] The invention can include a disposable absorbent article including a first nonwoven substrate, a second nonwoven substrate, and the hot melt composition, wherein the hot melt composition is present as a continuous coating and is positioned between the first nonwoven substrate and the second nonwoven substrate.

[0035] The invention can include a disposable absorbent article including a first nonwoven substrate; a second nonwoven substrate; and the hot melt composition, wherein the hot melt composition is present as a continuous coating and is positioned between the first nonwoven substrate and the second nonwoven substrate, the disposable absorbent article being selected from the group consisting of an adult incontinence product and a feminine hygiene article.

[0036] The invention is particularly beneficial for adult incontinence products and feminine hygiene articles, as it helps users maintain an active lifestyle while minimizing unwanted odors during use

[0037] The invention can include a method of decreasing the malodor content of a disposable absorbent article including the following steps: obtaining a hot melt composition comprising polymer, tackifying agent, and one or cucurbiturils and applying the hot melt composition to the disposable absorbent article.

[0038] CUCURBITURILS

[0039] The hot melt composition includes one or more cucurbiturils. Cucurbiturils are barrel-shaped molecules that have a symmetrical structure with a hollow hydrophobic cavity and polar portals. A cucurbituril can be a cyclic oligomer formed by linking glycoluril units via methylene bridges. The cucurbituril can be unsubstituted or substituted. Cucurbiturils can bind malodor compounds both within and outside of their central cavity and thus neutralize their odor. The hot melt composition includes one or more cucurbiturils.

[0040] Cucurbiturils are commonly written as cucurbit[n]uril, where n is the number of glycoluril units. In one embodiment, the hot melt composition includes a cucurbituril selected from the group consisting of cucurbit[5]uril, cucurbit[6]uril, cucurbit[7]uril, cucurbit[8]uril, and combinations thereof

[0041] Useful cucurbiturils are described in US 6,869,466 B2 and US20220313861 Al which are incorporated herein by reference. Useful commercially available cucurbiturils include AQ FRESH M10 available from Aqdot (Cambridge, UK).

[0042] Useful cucurbiturils can have a particle size specification of D (90) of from 2 micrometers (pm), 3 pm, 4 pm, 5 pm, 6 pm to 12 pm, 14 pm, 16 pm, 18 pm, 20 pm, 22 pm, 24 pm, 26 pm, 28 pm, 30 pm, 35 pm, 40 pm, 45 pm, 50 pm, 55 pm, 60 pm, or any two values there between.

[0043] The hot melt composition includes from 0.3% by weight, 0.5% by weight, 0.75% by weight, 1% by weight, 1.5% by weight to 2.5% by weight, 3% by weight, 3.5% by weight, 4% by weight, 4.5% by weight, 5% by weight, 6% by weight, 7% by weight, 8% by weight, 9% by weight, 10% by weight, 11% by weight, 12% by weight, 13% by weight, 14% by weight, 15% by weight, 16% by weight, 17% by weight, 18% by weight, 19% by weight, 20% by weight or any two values therebetween of one or more cucurbiturils.

[0044] PRE-MIX

[0045] The cucurbituril can be blended into one of the hot melt components to form a pre-mix prior to mixing it into the hot melt composition.

[0046] The pre-mix can include one or more of the hot melt components pre-blended with the cucurbiturils including a component selected from the group consisting of polymer, tackifying agent, wax, plasticizer and combinations thereof. The pre-mix can additionally include a fragrance. In one embodiment, the pre-mix includes plasticizer (e.g., oil) and cucurbiturils. The cucurbiturils are added to the plasticizer and blended with a high shear mixer. The pre-mix can include from 8% by weight, 10% by weight, 12% by weight, 15% by weight, 18% by weight, 20% by weight to 25% by weight, 30% by weight, 35% by weight, 40% by weight, 45% by weight, 50% by weight or any two values therebetween of cucurbiturils.

[0047] FRAGRANCE

[0048] The hot melt composition can additionally include a fragrance. The fragrance can be natural or synthetic.

[0049] The fragrance can be a natural substance such as essences from fruit parts / plant parts, essential oils, etc. e.g. anise oil, bitter almond oil, fennel oil, citrus oil (e.g. citral), jasmine oil, rose oil, chamomile oil, clove oil, mint oil, cinnamon leaf oil, orange blossom oil, oil of bergamot, eucalyptus oil, fir needle oil, guaiac wood oil, ginger oil, iris oil, lavender oil, lime oil, tangerine oil, lemon balm oil, etc.

[0050] The fragrance can be a synthetic fragrance. The synthetic fragrance can be identical to the natural fragrances, such as, for example, vanillin, menthol, eucalyptol, or can be artificial products. These fragrances can be derivatives of hydrocarbons, heterocycles, alcohols, aldehydes, ketones, acetals, esters, phenols, phenol ethers, etc.

[0051] The hot melt composition includes from 0.05% by weight, 0.075% by weight to 0.1% by weight, 0.15% by weight, 0.20% by weight, 0.25% by weight, 0.30% by weight, 0.35% by weight, 0.40% by weight, 0.45% by weight, 0.50% by weight, 0.60% by weight, 0.70% by weight or any two values therebetween of one or more fragrances.

[0052] POLYMER

[0053] The hot melt composition includes one or more polymers. The polymer can be selected from the group consisting of styrenic block copolymers (SBC), olefin polymers, functionalized versions thereof and combinations thereof. The polymer can be selected from the group consisting of olefin polymers, functionalized versions thereof and combinations thereof.

[0054] The hot melt composition can include an SBC. The SBC can have at least one A block that includes styrene and at least one B block that includes, e.g., elastomeric conjugated dienes (e.g., hydrogenated and unhydrogenated conjugated dienes), sesquiterpenes (e.g., hydrogenated and nonhydrogenated sesquiterpenes), and combinations thereof. The A blocks and the B blocks bind to one another in any manner of binding such that the resulting copolymer exhibits a variety of structures including, e.g., random, straight chained, branched, radial, star, comb, tapered, and combinations thereof. The block copolymer can exhibit any form including, e g., linear A-B block, linear A-B-A block, linear A-(B-A) n-B multi-block, and radial (A-B) n-Y block where Y is a multivalent compound and n is an integer of at least 3, tetrablock copolymer, e.g., A-B-A-B, and pentablock copolymers having a structure of A-B-A-B-A. The hot melt composition can include blends of at least two different block copolymers.

[0055] Suitable styrene A blocks include, e.g., styrene, alpha-methylstyrene, o-m ethyl styrene, m-methyl styrene, p-methyl styrene, p-tert-butylstyrene, 2,4- dimethyl styrene, 2,4,6-trimethylstyrene, and combinations thereof.

[0056] Suitable block elastomeric conjugated diene B blocks include, e.g., butadiene (e.g., polybutadiene), isoprene (e.g., poly isoprene), 2,3-dimethyl-l,3-butadiene, 1,3-pentadiene, 1,3-hexadiene, and combinations thereof, and hydrogenated versions thereof including, e.g., ethylene, propylene, butylene and combinations thereof. Suitable B block sesquiterpenes include, e.g., beta farnesene. The non-modified styrenic block copolymer can have an unsaturated mid-block, alternately the mid-block can be saturated i.e., hydrogenated.

[0057] In addition to elastomeric conjugated diene B blocks, styrene monomer can be distributed in the mid-block.

[0058] Useful SBCs include, e.g., poly(styrene-b-butadiene) (SB), poly(styrene- / ?-butadiene- S-styrene) (SBS), poly(styrene-Z>-isoprene) (SI), polystyrene- >-isoprene-Z>-styrene) (SIS), poly(styrene- »-('ethylene-co-butylene)- / ?-styrene) (SEBS), poly(styrene-6-(ethylene-a / / -propylene)-Z>-styrene) (SEPS), poly(styrene-£-isobutylene- >-styrene) (SIBS), poly(styrene-Z)-(ethylene-co-butylene-co-styrene)-Z’-styrene) (SEBSS) and combinations thereof.

[0059] Useful block copolymers are commercially available under the KRATON D, including KRATON D 1118 and KRATON G series of trade designations from Kraton Corporation, from (Houston, Texas) including, the VECTOR series of trade designations from Taiwan Synthetic Rubber Corporation (TSRC) (Taipei City, Taiwan) including VECTOR, and the GLOBALPRENE series of trade designations from LCY Grit Corp (Taiwan) including GLOBALPRENE 3546. The hot melt composition can include an olefin polymer. Useful olefin polymers include homopolymers, copolymers and higher order polymers such as e.g., terpolymers Useful olefin polymers can comprise any combination of olefin monomers. Useful olefin monomers include those selected from the group consisting of ethylene, propylene, isoprene, butene, butadiene, pentene, hexene, heptene, octene, nonene, decene, dodecene, 4-methyl- pentene-1, 3-methyl pentene-l,3,5,5-trimethyl-hexene-l, 5-ethyl- 1 -nonene, 1,9-decadiene, and combinations thereof. The olefin polymer can be selected from the group consisting of ethylene polymer, propylene polymer, and polybutene-1 polymer.

[0060] The olefin polymer can consist entirely of olefin monomers. Alternately, the olefin polymer can include functional groups. The functional groups useful herein are not limited and can include silane, maleic anhydride, hydroxyl groups and groups that include vinyl unsaturation examples of which include vinyl acetate, alkyl acrylate, alkyl methacrylate, and combinations thereof. Useful olefin polymers including vinyl unsaturation include, e.g., ethylene vinyl acetate, ethylene acrylate, ethylene methacrylate, ethylene methyl methacrylate, ethylene n-butyl acrylate, ethylene 2-ethyl hexyl acrylate, ethylene octyl acrylate, and combinations thereof.

[0061] The olefin polymer can be prepared using a variety of catalysts including, a single site catalyst (e.g, metallocene catalysts (e.g., metallocene-catalyzed ethylene / alpha-olefin copolymers)), multiple single site catalysts, non-metallocene heteroaryl catalysts, Ziegler Natta catalysts, and combinations thereof.

[0062] Useful olefin polymers exhibit a density of no greater than 0.93 g / cm3, 0.90 g / cm3, no greater than 0.89 g / cm3, or even no greater than 0.88 g / cm3.

[0063] Useful olefin polymers exhibit a melt flow rate of from 0.5, 3, 5, 10, 15, 20, 30, 40, 50 to 200, 300, 400, 500, 600, 800, 1000, 1500, 2,000 grams (g) / 10 minutes, or any two values therebetween as measured according to ASTM D1238A-20 at 190 °C using a 2.16 kg load.

[0064] The olefin polymer can be an ethylene polymer. The ethylene polymer can be an ethylene / alpha-olefin copolymer. Useful ethylene / alpha-olefin copolymers exhibit a melt flow rate of from 3, 5, 10, 15, 20, 30, 40, 50 to 200, 300, 400, 500, 600, 800, 1000, 1500, 2,000 grams (g) / l 0 minutes, or any two values therebetween as measured according to ASTM D1238A-20 at. 190 °C using a 2, 16 kg load Useful ethylene / alpha-olefin copolymers exhibit a density of no greater than 0.93 g / cm3, no greater than 090 g / cm3, no greater than 0.89 g / cm3, or even no greater than 0.88 g / cm3. The ethylene / alpha-olefin copolymer is derived from ethylene and an alpha-olefin co-monomer, e.g., alpha-olefin monomers having at least three carbon atoms, at least four carbon atoms, at least six carbon atoms, at least eight carbon atoms, and combinations of such monomers. Suitable alpha-olefin co-monomers include, e.g., propylene, butene, pentene, hexene, heptene, octene, nonene, decene, dodecene, 4- methyl-pentene-1, 3-methyl pentene-l,3,5,5-trimethyl-hexene-l, 5-ethyl-l -nonene, 1,9-decadiene, and combinations thereof. Specific examples of suitable ethylene / alpha-olefin copolymers include ethylene-propylene, ethylene-butene, ethylene-hexene, ethylene-octene, and combinations thereof.

[0065] The ethylene / alpha-olefin copolymer can be prepared using a variety of catalysts including, e.g., a single site catalyst (e.g., metallocene catalysts (e.g., metallocene-catalyzed ethylene / alpha-olefin copolymers)), multiple single site catalysts, non -metallocene heteroaryl catalysts, Ziegler Natta catalysts, and combinations thereof.

[0066] Useful ethylene / alpha-olefin copolymers are commercially available under a variety of trade designations including, e.g., the AFFINITY series of trade designations from The Dow Chemical Company (Midland, Michigan) including AFFINITY GA 1900 and AFFINITY GA 1950 ethylene-octene copolymers and the ENGAGE series of trade designations from The Dow Chemical Company (Midland, Michigan) including ENGAGE 8407 and ENGAGE 8200.

[0067] The olefin polymer can be a propylene polymer. Useful propylene polymers include, e.g., propylene homopolymers, propylene / alpha-olefin copolymers that are derived from greater than 50 % by weight propylene and at least one alpha-olefin co-monomer, and combinations thereof. Useful alpha-olefin comonomers include, e.g, alpha-olefin monomers having at least two carbon atoms, at least four carbon atoms, from four carbon atoms to eight carbon atoms, and combinations of such monomers, including, e.g., ethylene, butene, pentene, hexene, heptene, octene, nonene, decene, dodecene, 4-methyl-pentene-l, 3-methyl pentene-1,3,5,5-trimethyl-hexene-l, 5-ethyl-l -nonene, 1,9-decadiene, and combinations thereof.

[0068] Specific examples of suitable propvlene-alpha-olefin copolymers include propylene-ethylene, propylene-butene, propylene-hexene, propylene-octene, and combinations thereof.

[0069] The propylene polymer can be prepared using a variety of catalysts including, e.g., a single site catalyst (e.g., metallocene catalysts (e.g., metallocene-catalyzed propylene polymers)), multiple single site catalysts, non-metal locene heteroaryl catalysts, Ziegler Natta catalysts, and combinations thereof.

[0070] The propylene polymer can exhibit heat of fusion of from 0 J / g to 70 J / g or even from 5 J / g to 40 J / g. The propylene polymer preferably a density of no greater than 0.93 g / cm3, no greater than 0.90 g / cm3, no greater than 0.89 g / cm3, or even no greater than 0,88 g / cm3.

[0071] The propylene polymers can exhibit a melt flow rate of from 3, 5, 10, 15, 20, 30, 40, 50 to 200, 300, 400,500, 600, 800, 1000, 1500, 2,000 grams (g) / l 0 minutes, or any two values therebetween as measured according to ASTM D1238A-20 at 190 °C using a 2.16 kg load.

[0072] Useful propylene polymers are commercially available under a variety of trade designations including, e.g., the VISTAMAXX series of trade designations from ExxonMobil Chemical Company (Houston, Texas) including VISTAMAXX 6202, VISTAMAXX 6502, VISTAMAXX 8880, VISTAMAXX 8780, and VISTAMAXX 8380 propyl ene-ethylene copolymers, the LICOCENE series of trade designations from Clariant Int'l Ltd. (Muttenz, Switzerland) including, e.g., LICOCENE PP 2602, LICOCENE PP 3602, and LICOCENE PP 1602 propyl ene-ethylene copolymers, propylene homopolymers available under the L-MODU series of trade designations from Idemitsu Kosan Co., Ltd. (Japan) including L-MODU S410 polypropylene and L-MODU S400 polypropylene.

[0073] The hot melt composition includes from 5% by weight, 10% by weight, 15% by weight to 30% by weight, 35% by weight, 40% by weight, 45% by weight, 50% by weight, 55% by weight, 50% by weight, 60% by weight or any two values therebetween of a polymer.

[0074] TACKIFYING AGENT

[0075] The hot melt composition can include one or more tackifying agents.

[0076] The tackifying agent can function to tackify the mid-block of the SBC or to reinforce the end block of the SBC. The tackifying agent can be fluid or solid at room temperature. Suitable classes of tackifying agents include, e.g., aromatic, aliphatic and cycloaliphatic hydrocarbon resins, mixed aromatic and aliphatic modified hydrocarbon resins, aromatic modified aliphatic hydrocarbon resins, and hydrogenated versions thereof; terpenes, modified terpenes and hydrogenated versions thereof; natural rosins, modified rosins, rosin esters, and hydrogenated versions thereof; low molecular weight polylactic acid; and combinations thereof. The tackifying agent can have an average Ring and Ball softening point of from 90°C to 130°C, 95°C to 120°C, or even 100°C to 115°C.

[0077] The tackifying agent can be a hydrogenated hydrocarbon tackifying agent.

[0078] The hot melt compositions of this invention can be free of non-hydrogenated tackifying agents (e.g., non-hydrogenated C5 resins). Non-hydrogenated tackifying agents have been found to increase the color, odor, and increase the degradation at high temperature of the hot melt composition. Hydrogenated hydrocarbon tackifying agents are lower in odor and color and have been shown to have improved heat stability.

[0079] Suitable classes of hydrogenated hydrocarbon tackifying agents include, e.g., aromatic, aliphatic and cycloaliphatic hydrocarbon resins, aromatic modified aliphatic or cycloaliphatic hydrocarbon resins, terpenes, modified terpenes and combinations thereof. Examples of useful aliphatic and cycloaliphatic petroleum hydrocarbon resins include aliphatic and cycloaliphatic petroleum hydrocarbon resins include, e.g., branched and unbranched C9 resins and CIO resins. Examples of useful polyterpene resins include polyterpene resins, and copolymers and terpolymers of natural terpenes (e.g., styrene-terpene, alpha-methyl styrene-terpene and vinyl toluene-terpene).

[0080] Preferred classes of hydrogenated hydrocarbon tackifying agents include hydrogenated hydrocarbon resins having aromatic content. Hydrogenated hydrocarbon resins having aromatic content can be selected from the group consisting of aromatic modified hydrocarbon resin and aromatic hydrocarbon resin.

[0081] Useful tackifying resins include those available under the ESCOREZ trade designation from ExxonMobil Chemical Company including ESCOREZ 5600 (Molecular Weight - Weight Average (Mw) = 800 g / mole, 9.8% aromatic content), ESCOREZ 5690 (10% aromatic content), ESCOREZ 5615 (9.9% aromatic content), ESCOREZ 5637 (5% aromatic content) and ESCOREZ 5400 (0% aromatic content, Mw = 670 g / mole), and the EASTOTAC series of trade designations from Eastman Chemical (Kingsport, Tennessee) including, e g., EASTOTAC H-100R and H-100L.

[0082] The hot melt composition includes from 10% by weight, 15% by weight, 20% by weight, 25% by weight, 30% by weight to 50% by weight, 55% by weight, 60% by weight, 65% by weight, 70% by weight or any two values therebetween of a tackifying agent. PLASTICIZER

[0083] The composition can optionally include a plasticizer. The plasticizer can be a liquid at room temperature. The hot melt composition can include more than one plasticizer.

[0084] Useful plasticizers include, e.g., polybutene, polyisobutylene, polyolefin copolymers (e.g., propyl ene-ethylene copolymers), oligomerized alpha olefins, oils (e.g., naphthenic petroleum-based oils, paraffinic oils, mineral oils, animal oils, vegetable oils, synthetic oils, derivatives of oils, liquid isoprene, glycerol esters of fatty acids, and combinations thereof), and combinations thereof.

[0085] Useful commercially available plasticizers include, e g., plasticizers sold under the NYFLEX series of trade designations from Nynas Corporation (Houston, Texas) including, e.g., NYFLEX 222B and NYFLEX 223, KAYDOL OIL from Sonnebom, LLC (Parsippany, New Jersey), KRYSTOL 550 mineral oil from Petrochem Carless Limited (Surrey, England), and CALSOL 5550 oil from Calumet Specialty Products Partners, LP (Indianapolis, Indiana), The composition includes from 5% by weight, 10% by weight, 15% by weight to 30% by weight, 35% by weight, 40% by weight, 45% by weight or any two values therebetween of plasticizer.

[0086] WAX

[0087] The hot melt composition can include a wax. Useful classes of wax include, e.g., paraffin waxes, microcrystalline waxes, high density low molecular weight polyethylene waxes, by-product polyethylene waxes, polypropylene waxes, Fischer-Tropsch waxes, oxidized Fischer-Tropsch waxes, functionalized waxes such as acid, anhydride, and hydroxyl modified waxes, animal waxes, vegetable waxes (e.g., soy wax) and combinations thereof. Useful waxes are solid at room temperature and preferably have a Ring and Ball softening point of from 50°C to 170°C. The wax can be a propylene based wax with a Mettler Softening Point (ASTM D 6092) of greater than 130°C, greater than 140°C, or even greater than 150°C.

[0088] Useful waxes are commercially available from a variety of suppliers including EPOLENE N and C series of trade designations from Westlake Chemical Corporation (Houston, Texas) including e.g., EPOLENE N-21, EPOLENE N-15 and EPOLENE C-13, the LICOCENE series of trade designations from Clariant International Ltd. (Muttenz, Switzerland) including e.g., LICOCENE PP 6102, LICOCENE PP 6502 TP, LICOCENE PP 7502 TP and LICOCENE PE MA 4315 and the VISCOWAX series of trade designations from Innospec Leuna GmbH (Leuna, Germany) including e.g. VISCOWAX 116.

[0089] The hot melt composition can include from 0% by weight, 1% by weight, 2% by weight to 5% by weight, 7% by weight, 10% by weight or any two values therebetween of a wax,

[0090] OPTIONAL COMPONENTS

[0091] The composition can optionally include a variety of additional components including, e.g., fillers, super absorbents, surfactants, flame retardants, additional polymers, and various additives (e.g., coextrusion coatings, packaging film, stabilizers, antioxidants, adhesion promoters, ultraviolet light stabilizers, rheology modifiers, biocides, corrosion inhibitors, dehydrators, colorants (e.g., pigments and dyes), optical brighteners, additional odor reducing compounds and combinations thereof).

[0092] The hot melt composition can include additional odor reducing compounds. These additional odor reducing compounds can include one or more of the following: organic adsorbents (e.g., cyclodextrins) and inorganic sorbents including, e.g., zeolites (e.g., chabasite, gumerinite, levynite, erinite, mordenite and analcite), molecular sieves (e.g., alkali metal alumino-silicates), silica gel, silica-magnesia gel, silica-alu- mina gel, activated carbon, activated alumina, calcium oxide, and combinations thereof. Suitable alkali metal alumino- sili- cate molecular sieves include, e.g., calcium, potassium, and sodium alkali metal aluminosilicates.

[0093] The hot melt composition can optionally include from 0.3% by weight, 0.5% by weight, 0.75% by weight, 1% by weight, 1.5% by weight to 2.5% by weight, 3% by weight, 3.5% by weight, 4% by weight, 4.5% by weight, 5% by weight, 6% by weight, 7% by weight, 8% by weight, 9% by weight, 10% by weight, 11% by weight, 12% by weight, 13% by weight, 14% by weight, 15% by weight, 16% by weight, 17% by weight, 18% by weight, 19% by weight, 20% by weight or any two values therebetween of one or more additional odor reducing compounds

[0094] Useful antioxidants include, e.g., pentaerythritol tetrakis[3,(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 2,2'-methylene bis(4-methyl-6-tert-butylphenol), phosphites including, e.g, tris-(p-nonylphenyl)-phosphite (TNPP) and bis(2,4-di-tert-butylphenyl)4,4'- diphenylene-diphosphonite, di-stearyl-3,3'-thiodipropionate (DSTDP), and combinations thereof. Useful antioxidants are commercially available under a variety of trade designations including, e.g., the IRGANOX series of trade designations including, e.g., IRGANOX 1010, IRGANOX 565, and IRGANOX 1076 hindered phenolic antioxidants and IRGAFOS 168 phosphite antioxidant, all of which are available from BASF Corporation (Florham Park, New Jersey), and ETHYL 702 4,4'-methylene bis(2,6-di-tert-butylphenol), and the BNX series of trade designations including, e.g., BNX 1010 and BNX 1076 from Mayzo, Inc. (Suwanee, Georgia). When present, the hot melt composition preferably includes from about 0.1 % by weight to about 2 % by weight antioxidant.

[0095] METHODS OF MAKING

[0096] The cucurbiturils can be mixed into the hot melt composition by different methods. Any method can be used as long as the cucurbiturils are evenly distributed within the final hot melt composition. In one method, the finished hot melt composition is melted under heat (125°C - 175°C), the cucurbiturils are added, and the composition is mixed with a suitable mixer until smooth. In a different method, the cucurbiturils are added to the plasticizer under heat (125°C - 175°C) in an upright mixer until evenly distributed and then the polymer, tackifying agent and any other materials added. The hot melt composition is then mixed until smooth. Alternatively, the cucurbiturils can be formed into a pre-mix and then added to the hot melt composition. If needed the hot melt composition can be filtered to remove any lumps prior to packaging.

[0097] USES

[0098] The hot melt compositions of this invention can be used as an adhesive and to reduce the malodor of disposable absorbent articles. The hot melt composition can be used to eliminate the odor of the disposable absorbent article as well as environmental odors including odors from humans and pets including e.g. urine, body odor, sweat, feces, wounds, and menstrual secretions.

[0099] The hot melt composition is useful in a variety of applications and constructions including, e.g., disposable absorbent articles including, e.g., disposable diapers (e.g., traditional diapers, training pants, etc.), adult incontinence products, sanitary napkins (e.g., menstrual pads), medical dressings (e.g., wound care products), bandages, surgical pads, pet training pads (e.g. puppy pads) and meat-packing products, and components of absorbent articles including, e.g., an absorbent element, absorbent cores, impermeable layers (e.g., backsheets), tissue (e.g., wrapping tissue), acquisition layers and woven and nonwoven web layers (e.g., top sheets, absorbent tissue).

[0100] The hot melt composition is particularly useful for reducing the odor of a disposable absorbent article selected from the group consisting of adult incontinence products and sanitary napkins. The cucurbituril can be present in an amount of from 5 milligrams (mg), 8 mg, 10 mg, 12 mg, 14 mg, 16 mg, 18 mg, 20 mg to 25 mg, 30 mg, 35 mg, 40 mg, 45 mg, 50 mg, 55 mg, 60 mg, 65 mg, 70 mg, 75 mg, 80 mg, 85 mg, 90 mg, 95 mg, 100 mg, 105 mg, 110 mg, 120 mg, 130 mg, 140 mg, 150 mg, 160 mg, 170 mg, 180 mg, 190 mg, 200 mg, 210 mg, 220 mg, 230 mg, 240 mg, 250 mg, 260 mg, 270 mg, 280 mg, 290 mg, 300 mg, 310 mg, 320 mg, 330 mg, 340 mg, 350 mg or any two values therebetween in the individual article.

[0101] The hot melt composition also can be applied to a variety of substrates including, e.g., films (e.g., polyolefin (e.g., polyethylene and polypropylene), polyester, metallized polymer, multilayer, biaxially oriented, monoaxially oriented, ethylene-vinyl acetate copolymer, polyurethane, vinyl, polyvinylidene fluoride, cellulose acetate and ethyl cellulose, and polyamide films, and combinations thereof), metal foils, release liners, porous substrates, cellulose substrates, sheets (e.g., paper and fiber sheets), paper products, woven and nonwoven webs, fibers (e.g., natural cellulose fibers such as wood pulp, cotton, silk and wool; cellulosic fibers; synthetic polymer fibers such as nylon, rayon, polyesters, acrylics, polypropylenes, polyethylene, polyvinyl chloride, and polyurethane; glass fibers; recycled fibers; and various combinations thereof), and tape backings. Useful substrates include, e.g., single layer, multilayer, treated (e.g., corona treated or chemically primed), and untreated substrates, and combinations thereof.

[0102] APPLICATIONS WITHIN A DISPOSABLE ABSORBENT ARTICLE

[0103] The hot melt composition can be used as an adhesive for any application within a disposable absorbent article e.g. positioning, core, core-wrap, construction, elastic attachment, etc. Alternately, the hot melt composition can be applied as a coating. In a preferred embodiment, the hot melt composition can be used for an application selected from the group consisting of construction, core, core wrap and a combination thereof. These applications are preferred as the hot melt composition is generally coated on a larger surface area of the disposable absorbent article.

[0104] The hot melt composition is preferably applied between two nonwoven substrates as a continuous film, A slot die can be used to coat the hot melt composition in this manner.

[0105] Positioning

[0106] The hot melt composition can be a hot melt pressure-sensitive adhesive composition. Hot melt pressure-sensitive adhesive compositions of this invention are useful as a positioning adhesive disposed on at least one substrate surface of a disposable absorbent article and can be used to position an absorbent article on a garment such as underwear. Such disposable absorbent articles include, e.g., feminine hygiene articles such as sanitary napkins and panty liners, diapers, disposable garments having a waist opening and leg openings, and adult incontinence articles.

[0107] In one construction, the disposable absorbent article (e.g., a feminine hygiene article) includes a garment facing surface and a body facing surface, a topsheet having a garment facing surface and a body facing surface, a backsheet having a garment facing surface and a body facing surface, and optionally an absorbent core disposed between the body facing surface of the backsheet and the garment facing surface of the topsheet. The absorbent core can be optional as for absorbent articles having limited absorption, a specific top sheet e.g., high lofted top sheet can also serve as the absorbent portion of the article.

[0108] The top sheet defines a body-facing surface of the absorbent article. The absorbent core is positioned inwardly from the outer periphery of the absorbent article. The absorbent structure includes a body -facing surface and a garment-facing surface positioned adjacent the backsheet. The positioning adhesive composition is disposed between a release liner and the backsheet, which is permanently adhered to the absorbent core through a permanent adhesive composition. The top sheet is permanently adhered to the absorbent core through a discontinuous permanent adhesive composition. The top sheet and the backsheet are joined together and the sealed edges of the top sheet and the backsheet define an overall sealed peripheral edge of the article. The absorbent article can be of any suitable shape and size. The top sheet is designed to contact the body of the user and is liquid permeable The exposed surface of the liquid permeable top sheet is designed to receive aqueous fluids from the body, which fluids will then be directed away from the body of the user and toward the absorbent core. The top sheet is constructed of any suitable material that is easily penetrated by bodily exudates. The top sheet optionally includes a plurality of apertures formed therethrough to permit body fluid to pass more readily into the absorbent core.

[0109] The backsheet is liquid-impermeable and designed to face the inner surface, i e, the crotch portion of the garment (e.g., underwear) of a user. The backsheet optionally is constructed to permit a passage of air or vapor out of the absorbent article (e.g., a vapor permeable layer), while still blocking the passage of liquids.

[0110] The hot melt pressure-sensitive adhesive composition is disposed on the garment facing surface of the adsorbent article, in general, or even on the garment facing surface of the backsheet. A release liner optionally is disposed on the pressure-sensitive hot melt composition to protect the pressure-sensitive adhesive composition until use. The absorbent article (e.g., a feminine hygiene article) optionally includes additional layers and adhesives and the components of the absorbent article optionally exhibit additional functionality.

[0111] Examples of additional layers, functionality and combinations thereof include dusting, wicking, acquisition, additional top sheets, multiple core layers, superabsorbent particles and compositions, wetness indicators, and combinations thereof.

[0112] Core Stabilization

[0113] The hot melt compositions of this invention can be used to contain, immobilize and / or provide strength to the absorbent core of a disposable absorbent article (i.e., core stabilization).

[0114] The absorbent core includes the core and optionally a core wrap. The absorbent core can be manufactured in-line (i.e., in the disposable absorbent article) assembly line.

[0115] Alternatively, the core can be manufactured off-line and then rolled up or festooned for use at a later date or a different location. The core can vary in design, shape, and in the materials used. It can be shaped like a long rectangle or like a dog bone. It can be one continuous shape or can be broken into channels formed by for example the top sheet and the back sheet. The core is generally centered within the article and is firmly secured between the top sheet and back sheet through an attachment means (e.g., an adhesive).

[0116] The core includes absorbent materials capable of absorbing bodily fluids and solids received through the top sheet. The core can include cellulose fibers (i.e. fluff), wood pulp, cotton, synthetic fibers, nonwoven, tissue, foam, superabsorbent polymers (e.g. polyacrylates) or any other absorbent material.

[0117] The absorbent core can comprise less than 10% by weight fluff, or even be entirely fluff free. In a low fluff or fluff free core, the absorbent core comprises the hot melt composition and superabsorbent polymer and optionally layers of nonwoven and / or tissue. The core can be a composite core. A composite core can comprise less than 10% by weight fluff, or even be entirely fluff free. A composite core includes more than one layer of SAP alternating with layers of nonwoven or tissue and the hot melt composition. The composite core can include from 1 to 5, or even from 2 to 4 individual layers of SAP, alternating with hot melt composition and nonwoven or tissue.

[0118] The core wrap can be any material that wraps around the core to hold the components of the core in place. The core wrap generally wraps around the two longer sides of the core, leaving the ends open. The core wrap can be selected from the group consisting of nonwoven and tissue.

[0119] The hot melt composition can be used to hold the absorbent materials in place in both the dry (unexpanded state) and wet (swollen state).

[0120] The absorbent core can be used in a variety of disposable absorbent articles including, e.g., disposable diapers, adult incontinence products, sanitary napkins, medical dressings (e.g., wound care products), bandages, surgical pads, pet training pads (e.g puppy pads) and meat¬ packing products.

[0121] Construction

[0122] The hot melt composition can further be used for construction applications. In a typical construction application in the manufacture of a disposable absorbent article, a body fluid impermeable backsheet is bonded to a nonwoven substrate. In other construction applications, a nonwoven substrate is bonded to a nonwoven substrate. The hot melt composition may also be used to bond at least one additional layer or material selected from the group consisting of absorbents, tissues, elastomeric materials, superabsorbent polymers, and combinations thereof For example, the hot melt composition can further be used for back sheet lamination i.e., where the body fluid impermeable backsheet typically a polyolefin film (e.g., polyethylene, polypropylene, ethylene vinyl acetate, ethylene copolymer, etc.) is bonded to a second nonwoven to improve the feel of the disposabl e article.

[0123] Elastic Attachment

[0124] The hot melt composition can be used for elastic attachment applications, which include bonding elastic material (e.g., strands, film, etc.) to a component of the disposable absorbent article. The elastic material can be coated with the hot melt composition while in a stretched form and then bonded to a film (e.g., polyethylene, polypropylene, etc.) or a nonwoven substrate. The elastic material coated with the hot melt composition can also be bonded between two such substrates. This process results in creep resistant gathers once the tension is removed

[0125] The hot melt composition can alternatively be applied to the film or nonwoven substrate and then the elastic material bonded to it. The hot melt composition can be used as an elastic attachment adhesive in forming the ear / tab of the disposable absorbent article. Alternatively, the hot melt composition can further be used as an elastic attachment adhesive to help elasticize either the leg holes or the waist of the disposable absorbent article.

[0126] ADDITIONAL APPLICATIONS

[0127] In addition to various applications within a disposable absorbent article, the hot melt compositions of this invention can also be used for stick to skin applications (eg., medical tapes and bandages, wearable devices (e.g., colostomy bags), athletic and kinesiology tapes, wound dressings, etc.) and for any application where there is a desire to decrease malodors.

[0128] The hot melt composition is useful in a variety of forms including, e.g., as a coating (e.g., continuous and discontinuous (e.g., random, pattern, array, spiral, dots, spots, and combinations thereof) coatings), film (e.g., continuous films and discontinuous films), bead, sheet, fiber, filament, web (e.g., woven and nonwoven), and combinations thereof.

[0129] Various application techniques can be used to apply the adhesive composition to a substrate including, e.g., slot coating, spraying (e.g., spiral spraying and random spraying), screen printing, foaming, engraved roller, extrusion, meltblown adhesive application techniques, and combinations thereof.

[0130] The hot melt composition can be applied in a coat weight of from 2 g / m2, 3 g / m2, 4 g / m2to 6 g / m2, 7 g / m2, 8 g / m2, 9 g / m2, 10 g / m2, 11 g / m2, 12 g / m2, 13 g / m2, 14 g / m2, 15 g / m2, 16 g / m2, 17 g / m2, 18 gm2, 19 g / m2, 20 g / m2or any two values therebetween.

[0131] The invention will now be described by way of the following examples.

[0132] EXAMPLES

[0133] Test Procedures

[0134] Test procedures include the following. All ratios and percentages are by weight unless otherwise indicated. The procedures are conducted at room temperature (i.e., an ambient temperature of from about 20 °C to about 25 °C) unless otherwise specified. The properties set forth for the components used in the compositions are as reported by the manufacturer unless otherwise specified.

[0135] Brookfield Viscosity Test Method

[0136] Brookfield Viscosity is determined in accordance with ASTM D-3236 entitled, “Standard Test Method for Apparent viscosity of Hot Melt Adhesives and Coating Materials,” (October 31, 1988), using a Brookfield Thermosel viscometer Model RVDV 2, and a number 27 spindle. The results are reported in centipoise (cP) and the test is performed at the specified temperature.

[0137] Weight % VOC Reduction by Adhesive Pattern

[0138] Headspace gas chromatography was used to compare the amount of residual malodor molecules present in the head space of an enclosed container.

[0139] Testing was performed using a thermal desorption with gas chromatography mass spectrometry. Equipment used was an Agilent 5977B SQ GCMS with 8890 GC, UNITY-xr with electronic control of split and desorb flows, and ULTRA-xr 100 tube autosampler with automated outlet re-collection. A quantitative analysis looking for the following VOC malodours was performed: propanol, propan-2-ol, 2,3-butanedione, dimethyl disulfide, acetic acid, isovaleric acid, and 2- nonenal. A headspace of the above VOC’s was prepared in 6 liters of compressed air.

[0140] The sample of nonwoven to nonwoven (NW-NW) laminate was made with 9 g / m2of hotmelt containing 4% by weight AQFRESH MIO and prepared by either slot coating, multiline, or spiral spray patterns. A 20 centimeter (cm) by 10 cm area of the NW-NW was placed into a 6-liter Nalophan bag. Three liters of the VOC containing headspace was added to the bag. The sample was allowed to equilibrate with V OC containing headspace for 24 hours at 20°C. A 1 -liter volume of headspace was then extracted onto a Tenax TD tube for analysis using a gas pump with flow7controller. Two tests of each sample were performed, and the results were averaged. A separate bag with NW-NW coated 9 g / m2and no AQFRESH MIO was used as a control.

[0141] Kimchi Extract Odor Panel Test

[0142] A nonwoven-to-nonwoven laminate was made using the specified coat weight of FC7250 including the specified amount of AQ FRESH M10. The synthetic odor source was 100 micro liters of Kimchi extract on filter paper. The synthetic odor source and the laminate including the hot melt composition were placed in a 5-liter plastic bag. The laminate was 56 cm by 10 cm. The bags were filled with approximately the same amount of synthetic air and then sealed. The sealed bags were aged at room temperature for 3 and 18 hours. The head space was then transferred to a second 5-liter bag. Six panelists smelled air from the same bag and rated the smell according to the following scale. The results are an average of all panelists.

[0143] The following scale was used:

[0144] 0 - not noticeable

[0145] 1 -noticeable

[0146] 2-smell

[0147] 3 -strong

[0148] 4-unpleasant

[0149] 5-very unpleasant Urine Testing

[0150] A nonwoven-to-nonwoven laminate was made using 9 grams / meter squared (g / m2) of FC7250 including 6% by weight of AQ FRESH M IO. Two tests were done. In the first test, 20 centimeters (cm) by 10 cm portion of the laminate was stapled to both the top and the back of a normal flow incontinence pad. In the second test, 20 centimeters (cms) by 10 cms portion of the laminate was stapled to the back of a light flow incontinence pad. 8 panelists collected their own urine in the morning and aged it for 24 hours at room temperature in a sealed jar.

[0151] In the first test, each panelist poured 120 milliliters (mL) of their urine slowly onto the pad. The pad was then placed in a 1 -liter glass jar, and the glass jar was sealed and stored at 36°C for the duration of the test. At each timepoint, the panelist removed the jars and rated the odor intensity of each headspace. In the second test, 15 mL of urine was applied to the liner, and the rest of the testing protocol remained the same.

[0152] The following sensory scale was used by the panelists:

[0153] 0 - not noticeable

[0154] I -noticeable

[0155] 2-smell

[0156] 3 -strong

[0157] 4-unpleasant

[0158] 5 -very unpleasant

[0159] Preparation

[0160] Hot melt compositions used for the examples were prepared by mixing molten FULL CARE 7250 with the AQFRESH M10 under nitrogen in the desired amount in a vertical mixer operating at 160°C. The Brookfield Viscosity of FULL CARE 7250 including AQFRESH M10 at 6% by weight was 4680 cP at 150°C.

[0161] FULL CARE 7250 is an olefin based hot melt adhesive composition available from FIB Fuller Company. AQFRESH M10 was milled to a particle size specification of D (90) = 10 pm (meaning that 90% of the particles (by volume) are 10 microns or smaller).

[0162] The nonwoven used for the following test methods was a standard spun bond nonwoven having a basis weight of 19g / m2. The nonwoven-to-nonwoven bonds were formed using a standard roll to roll laminating machine equipped with the appropriate nozzle. The hot melt composition was applied at 150°C.

[0163] Table One -VOC Reduction by Adhesive Pattern

[0164] % by weight in FULL CARE 7250 Slot Multiline Spiral

[0165] 0% by weight AqFresh 34 36 38

[0166] 2% by weight AqFresh 54 44 51

[0167] 4% by weight AqFresh 61 NT NT

[0168] 6% by weight AqFresh 68 NT NT

[0169]

[0170] Table Two Kimchi Extract Odor Test 1 hour aging

[0171] Approximate Panel

[0172] AQ FRESH Results

[0173] MIO amount

[0174] {milligrams)

[0175] Only odor 0 3.3

[0176] Only 15 gsm laminated 0 2.5

[0177] sample plus odor

[0178] 3 gsm laminated sample, 16 2.4

[0179] 6% AQFRESH MIO in

[0180] FC7250, plus odor

[0181] 15 gsm laminated sample, 50 1.3

[0182] 6% AQFRESH MIO in

[0183]

[0184] FC7250, plus odor

[0185] Table Three ~ Kimchi Extract Odor Test - 3-hour and 18-hour aging

[0186] Approximate Panel Panel

[0187] AQFRESH Results Results

[0188] MIO amount 3 hours 18

[0189] {milligrams) hours

[0190] Only odor 0 3 2.9

[0191] Only 15 gsm laminated sample 0 1.8 2.3

[0192] plus odor

[0193] 3 gsm laminated sample, 6% 10 1.8 1.9

[0194] AQFRESH MIO in FC7250, plus

[0195] odor

[0196] 15 gsm laminated sample, 6% 50 1.3 1.6

[0197] AQFRESH MIO in FC7250, plus

[0198]

[0199] odor Table Four - Urine Testing

[0200] 120-ml urine on a normal Control (no AQFRESH Example flow incontinence pad (21.6 MIO) Urine Intensity mg AQFRESH MIO per Urine Intensity

[0201] pad)

[0202] 10 minutes 2.4 2.5

[0203] 30 minutes 2.4 2.4

[0204] 1 hour 24 2.3

[0205] 2 hours 2.5 2.3

[0206] 4 hours 2.6 2.3

[0207]

[0208] 6 hours 2.6 2.5

[0209] Table Five - Urine Testing

[0210] 15-ml urine on a light flow Control (no AQFRESH Example incontinence pad (10.8 mg M10) Urine Intensity AQFRESH MIO per pad) Urine Intensity

[0211] 10 minutes 2.4 1.2

[0212] 30 minutes 2.1 1.6

[0213] 1 hour 2.3 1.6

[0214] 2 hours 26 1.7

[0215] 4 hours 2.9 1.6

[0216]

[0217] 6 hours 3.1 1.9

[0218] Other embodiments are within the claims.

[0219] What is claimed is:

Claims

1. A hot melt composition comprising:i) from 5% by weight to 50% by weight of a thermoplastic polymer,ii) from 10% by weight to 70% by weight of a tackifying agent,iii ) from 5% by weight to 45% by weight of a plasticizer, andiv) from 0.5% by weight to 10% by weight of one or more cucurbituril.

2. A hot melt adhesive composition comprising the hot melt composition of any of the proceeding claims.

3. The hot melt composition of any of the proceeding claims having a Brookfield Viscosity of from 100 cP to 15,000 cP when tested at 149°C.

4. A hot melt composition of any of the proceeding claims wherein the cucurbituril has an average particle size D (90) of from 2 pm to 20 pm, or even from 5 pm to 15 pm.

5. The hot melt composition of any of the proceeding claims wherein the cucurbituril is a blend of cucurbituril s.

6. The hot melt composition of any of the proceeding claims wherein the cucurbituril is selected from the group consisting of cucurbit[5]uril, cucurbit[6]uril, cucurbit[7]uril, cucurbit[8]uril and combinations thereof,7. The hot melt composition of any of the proceeding claims further comprising an additional odor reducing compound.

8. The hot melt composition of claim 7 wherein the additional odor reducing compound is a zeolite.

9. The hot melt composition of any of the proceeding claims wherein the tackifying agent is a hydrogenated hydrocarbon resin and the polymer is selected from the groupconsisting of styrenic block copolymers, olefin polymers, functionalized versions thereof and combinations thereof.

10. The hot melt composition of any of the proceeding claim wherein the tackifying agent is a hydrogenated hydrocarbon resin and the polymer is selected from the group consisting of olefin polymers, functionalized versions thereof and combinations thereof.

11. A hot melt composition comprising:i ) from 10% by weight to 35% by weight of a thermoplastic polymer selected from the group consisting of olefin polymers, functionalized versions thereof and combinations thereof,ii) from 25% by weight to 70% by weight of a tackifying agent consisting of a hydrogenated hydrocarbon resin,iii) from 15% by weight to 45% by weight of a plasticizer, andiv) from 2% by weight to 10% by weight of one or more cucurbituril.

12. A disposable absorbent article selected from the group consisting of disposable diaper, adult incontinence product, feminine hygiene product, medical dressing, wearable medical device, bandage, surgical pad, pet training pad and meat-packing comprising the hot melt composition of any of the proceeding claims13. The disposable absorbent article of claim 12 wherein the hot melt composition is used for an application selected from the group consisting of construction, core, core wrap and a combination thereof14. A disposable absorbent article comprising:i) a first nonwoven substrate,ii) a second nonwoven substrate, andiii ) the hot melt composition of any of the proceeding claims,wherein the hot melt composition is present as a continuous coating and is located between the first nonwoven substrate and the second nonwoven substrate.

15. The disposable absorbent article of claim 14 selected from the group consisting of an incontinence product and a feminine hygiene article.16 The disposable absorbent article of claim 14 or 15, w'herein at least one of the first and second nonwoven substrates also includes one or more cucurbituril.

17. The disposable absorbent article of any of the preceding claims wherein the article has a cucurbituril content of from 5 milligrams to 350 milligrams, or even from 5 milligrams to 250 milligrams.

18. A method of decreasing the malodor content of a disposable absorbent article comprising the following steps:i) obtaining a hot melt composition comprising a polymer, a tackifying agent, and one or more cucurbituril s,ii) applying the hot melt composition onto the disposable absorbent article.

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