Hot-melt adhesive compositions including modified styrene block copolymer and articles including the same.

Description

1 / 31 “HOT-MELTED ADHESIVE COMPOSITIONS INCLUDING MODIFIED STYRENE BLOCK COPOLYMER AND ARTICLES INCLUDING THE SAME” Fundamentals of the Invention

[0001] Hot melt adhesive compositions are frequently used to bond substrates to maintain the two substrates in a fixed relationship to each other or to contribute to the integrity and functionality of the final article. In the field of industrial adhesives, hot melt adhesive compositions are commonly used to bond or contribute to the integrity and functionality of a wide variety of articles, including packaging materials (e.g., general boxes and cardboard boxes) and disposable absorbent articles, including non-woven substrates, for example, adult urinary incontinence products, disposable diapers, sanitary napkins, bed protectors, puppy protectors, medical dressings, and others.

[0002] There may be several hot-melt adhesive compositions used in the manufacture of a disposable absorbent article. For example, in the manufacture of a disposable diaper, hot-melt adhesive compositions are used as construction adhesives (e.g., bonding the backing layer to the nonwoven and optionally to the absorbent pad), as elastic fastening adhesives (e.g., bonding the elastic material to the backing layer, e.g., in the leg or waist area), for core stabilization (e.g., applying a hot-melt adhesive composition to the absorbent core to increase core strength), for positioning, i.e., used in disposable absorbent articles (e.g., feminine hygiene) to position the article on a substrate (e.g., underwear), and as an elastic material to provide elasticity properties to the disposable absorbent article.

[0003] For hot melt adhesive compositions to work well in adhesive applications, for example, disposable absorbent articles applications, skin adhesive applications, etc., there is a need for hot melt adhesive compositions that have better adhesion to a variety of substrates under a variety of conditions. Petition 870250086630, dated 09 / 25 / 2025, pp. 60 / 94 2 / 31 Summary of the Invention

[0004] In one aspect, the invention relates to a hot-melt adhesive composition, including: from 5% to 40% by weight of an unmodified styrenic block copolymer, from 0.5% to 15% by weight of a modified styrenic block copolymer, from 30% to 65% by weight of a tackifying agent, and from 10% to 45% by weight of a plasticizer, wherein the hot-melt adhesive composition comprises less than 5% by weight of a wax. In another aspect, the invention relates to a hot-melt adhesive composition, including: from 5% by weight to 40% by weight of an unmodified styrenic block copolymer, from 0.5% by weight to 30% by weight of a modified styrenic block copolymer, from 30% by weight to 65% by weight of a tackifying agent, from 10% by weight to 45% by weight of a plasticizer, wherein the hot melt adhesive composition comprises less than 5% by weight of a wax.

[0005] In one embodiment, the invention relates to a disposable absorbent article, including the hot-melt adhesive composition. In another embodiment, the hot-melt adhesive composition includes less than 4% by weight of a wax or even from 0.5% by weight to less than 5% by weight of a modified wax.

[0006] In another embodiment, the modified styrenic block copolymer is a styrene block copolymer modified with organic acid or anhydride, selected from the group consisting of poly(styrene-b-(ethylene-cobutylene)-b-styrene and poly(styrene-b-(ethylene-alt-propylene)-b-styrene) and poly(styrene-b-isobutylene-b-styrene). In a different embodiment, the sum of the unmodified styrenic block copolymer and the modified styrenic block copolymer has an average styrene content of 20% by weight to 45% by weight. In another embodiment, the sum of the unmodified styrenic block copolymer and the modified styrenic block copolymer has an average styrene content of 25% by weight to 45% by weight. In a different embodiment, the sum of the unmodified styrenic block copolymer and the modified block copolymer Petition 870250086630, dated 09 / 25 / 2025, pp. 61 / 94 3 / 31 Modified styrenic block copolymer has an average diblock content of 0% by weight to 30% by weight. In one embodiment, the sum of the unmodified styrenic block copolymer and the modified styrenic block copolymer has an average diblock content of 10% by weight to 25% by weight.

[0007] In one embodiment, the tackifying agent has an average R&B softening point of 100 °C to 130 °C. In another embodiment, the tackifying agent is a hydrogenated hydrocarbon resin selected from the group consisting of hydrocarbon resins, modified aromatic hydrocarbon resins, aromatic hydrocarbon resins, and combinations thereof. In a different embodiment, the plasticizer is selected from the group consisting of naphthenic oil, paraffinic oil, polyisobutylene, polybutene, and combinations thereof.

[0008] In one embodiment, the hot melt composition has a Brookfield viscosity at 149 °C not exceeding 15,000 cP. In another embodiment, the hot melt composition has a Brookfield viscosity at 121 °C not exceeding 15,000 cP.

[0009] In another aspect, the invention relates to a pressure-sensitive hot-melt adhesive composition comprising from 5% by weight to 25% by weight of an unmodified styrene block copolymer, from 1% by weight to 10% by weight of a modified styrene block copolymer, from 40% by weight to 60% by weight of a hydrogenated hydrocarbon tackifying agent, and from 15% by weight to 45% by weight of an oil, or even a naphthenic oil, wherein the hot-melt adhesive composition comprises less than 5% by weight of a wax.

[0010] In one embodiment, the unmodified styrenic block copolymer and the modified styrenic block copolymer have an average styrene content of 25% by weight to 45% by weight, or even 15% by weight to 30% by weight, and an average diblock content of 10% by weight to 25% by weight.

[0011] In another embodiment, the invention relates to a disposable absorbent article including the pressure-sensitive hot-melt adhesive composition. In one embodiment, the invention relates to an article selected from the group consisting of medical tape, bandage, wearable device, athletic tape, kinesiology tape and wound dressing, including the hot-melt adhesive composition. Petition 870250086630, dated 09 / 25 / 2025, p. 62 / 94 4 / 31

[0012] In a different embodiment, the modified styrenic block copolymer is an organic acid or anhydride-modified styrene block copolymer selected from the group consisting of poly(styrene-b-(ethylene-cobutylene)-b-styrene and poly(styrene-b-(ethylene-alt-propylene)-b-styrene) and poly(styrene-b-isobutylene-b-styrene). In one embodiment, the pressure-sensitive hot melt adhesive composition includes at least one diblock-content styrenic block copolymer. In another embodiment, the peel-off of the pressure-sensitive hot melt adhesive does not decrease when tested according to the Moisture-Incubated Peel-Off Test Method.In another embodiment, the pressure-sensitive hot-melt adhesive composition exhibits a 180° peel adhesion on both stainless steel and high-density polyethylene (HDPE) of at least 5 N / cm when tested according to the 180° Peel Adhesion Test Method for HDPE or the Stainless Steel Test Method. In a different embodiment, the modified styrenic block copolymer, the styrenic block copolymer, the tack promoter, and the plasticizer comprise at least 90% by weight of the hot-melt adhesive composition.

[0013] In one embodiment, the modified styrenic block copolymer has a radial structure with 3 to 10 arms, a hydrogenated intermediate block, and a styrene content of 6% by weight to 15% by weight. In another embodiment, the modified styrenic block copolymer has a radial structure with 3 to 10 arms, a hydrogenated intermediate block, and a styrene content of 25% by weight to 45% by weight.

[0014] In another aspect, the invention relates to an absorbent article including: a top layer, a bottom layer, optionally an absorbent core disposed between the top layer and the bottom layer, a garment-facing surface and a pressure-sensitive hot-melt adhesive composition disposed on the garment-facing surface of the absorbent article, the pressure-sensitive hot-melt adhesive composition including styrene block copolymer, modified styrene block copolymer, tackifying agent and plasticizer. Petition 870250086630, dated 09 / 25 / 2025, pp. 63 / 94 5 / 31

[0015] The inventors found that the inclusion of modified styrene block copolymer in a limited wax composition results in hot-melt adhesive compositions that exhibit improved adhesion to various substrates under a variety of conditions.

[0016] The compositions of the invention are particularly useful as a positioning adhesive. A positioning adhesive is used to adhere disposable absorbent articles to various materials, including, for example, fabrics used in underwear. This can present challenges because, on one hand, the hot-melt adhesive composition needs to adhere to several different fabrics, including cotton, microfiber, etc., and in a variety of different environments, including high-humidity environments, such as, for example, when the user is physically active. On the other hand, the disposable absorbent article needs to be easily removed without tearing when the user is ready to discard it. Other attributes and advantages will be evident from the following description of the preferred embodiments and claims. Detailed Description of the Invention

[0017] The inventive compositions are hot-melt adhesive compositions, or even pressure-sensitive hot-melt adhesive compositions. Pressure-sensitive hot-melt adhesive compositions exhibit tackiness at room temperature.

[0018] The invention relates to a hot-melt adhesive composition comprising from 5% by weight to 40% by weight of an unmodified styrenic block copolymer, from 0.5% by weight to 15% by weight of a modified styrenic block copolymer, from 30% by weight to 65% by weight of a tackifying agent and from 10% by weight to 45% by weight of a plasticizer, wherein the hot-melt adhesive composition comprises less than 5% by weight of a wax.

[0019] The invention relates to a hot-melt adhesive composition comprising from 5% to 40% by weight of an unmodified styrenic block copolymer, from 0.5% to 30% by weight of a modified styrenic block copolymer, from 30% to 65% by weight of a tackifying agent and from 10% to 45% by weight of a plasticizer, wherein the Petition 870250086630, dated 09 / 25 / 2025, pp. 64 / 94 6 / 31 hot melt adhesive composition comprises less than 5% by weight of a wax.

[0020] The invention also relates to a hot-melt adhesive composition comprising from 10% by weight to 40% by weight of an unmodified styrenic block copolymer, from 0.5% by weight to 15% by weight of a modified styrenic block copolymer, from 30% by weight to 65% by weight of a tackifying agent and from 10% by weight to 45% by weight of a plasticizer, wherein the hot-melt adhesive composition comprises from 0% by weight to less than 4% by weight of a wax.

[0021] The invention also relates to a hot-melt adhesive composition comprising from 10% by weight to 40% by weight of an unmodified styrenic block copolymer, from 0.5% by weight to 30% by weight of a modified styrenic block copolymer, from 30% by weight to 65% by weight of a tackifying agent and from 10% by weight to 45% by weight of a plasticizer, wherein the hot-melt adhesive composition comprises from 0% by weight to less than 4% by weight of a wax.

[0022] The invention further relates to a pressure-sensitive hot-melt adhesive composition comprising from 5% by weight to 25% by weight of an unmodified styrenic block copolymer, from 1% by weight to 10% by weight of a modified styrenic block copolymer, from 40% by weight to 60% by weight of a hydrogenated hydrocarbon tackifying agent and from 25% by weight to 43% by weight of an oil, wherein the hot-melt adhesive composition comprises less than 5% by weight of a wax.

[0023] The invention also relates to a disposable absorbent article including: a top layer, a bottom layer, optionally an absorbent core disposed between the top layer and the bottom layer, a garment-facing surface and a pressure-sensitive hot-melt adhesive composition disposed on the garment-facing surface of the absorbent article, the pressure-sensitive hot-melt adhesive composition including styrene block copolymer, modified styrene block copolymer, tackifying agent and plasticizer. Petition 870250086630, dated 09 / 25 / 2025, pp. 65 / 94 7 / 31

[0024] The total amount of unmodified styrenic block copolymer, modified styrenic block copolymer, tackifying agent and plasticizer may constitute at least 80% by weight, at least 85% by weight, at least 90% by weight or even at least 95% by weight of the hot melt adhesive composition.

[0025] The hot melt adhesive composition may have a Brookfield viscosity of not more than 20,000 centipoise (cP), not more than 15,000 cP, not more 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.

[0026] When the hot melt adhesive composition is a pressure-sensitive adhesive composition, it may exhibit delamination that does not diminish with aging under high humidity conditions, as tested according to the Humidity Incubated Delamination Test Method.

[0027] The hot melt adhesive composition provides strong adhesion to a wide variety of substrates. When the hot melt adhesive composition is a pressure-sensitive adhesive composition, it can provide a 180° peelback to both stainless steel and high-density polyethylene (HDPE) of at least 3 N / cm, or even at least 5 N / cm when tested according to the 180° Peelback Adhesion Test Method for HDPE or the Stainless Steel Test Method. Styrene Block Copolymer

[0028] The hot melt adhesive composition includes an unmodified styrenic block copolymer (SBC) and a modified SBC.

[0029] Unmodified and modified SBCs may include more than one type of SBC. When more than one SBC is included, the styrene content, diblock content, and melt flow index ranges specified below are a weighted average of the various types present, including both unmodified and modified types.

[0030] For example, if the hot melt adhesive composition comprises two SBCs A and B, polymer A is present at 25% by weight (wA) with a styrene content of 15% (sA), and polymer B is present at 25% in Petition 870250086630, dated 09 / 25 / 2025, pp. 66 / 94 8 / 31 by weight (wb) with a styrene content of 20% by weight (sb). The average styrene content of the styrenic block copolymer is calculated as follows: wA / ( wA+wB)* sA + wB / ( wA+wB)* sB = 0.5 (15) + 0.5 (20) = 17.5% by weight.

[0031] SBC may have an average styrene content of 15% by weight to 45% by weight, 20% by weight to 45% by weight, 25% by weight to 45% by weight, 27% by weight to 43% by weight, 28% by weight to 42% by weight or even 15% by weight to 30% by weight.

[0032] SBC may have an average Melt Flow Index (MFR) according to ASTM D 1238 (200 °C / 5 kg) in g / 10 min of 3 to 100, 3 to 40, 5 to 35 or even 5 to 20.

[0033] SBC may have an average diblock content, as reported by the supplier, of 0% by weight to 40% by weight, 0% by weight to 30% by weight, 0% by weight to 25% by weight, 5% by weight to 30% by weight, 8% by weight to 30% by weight, 10% by weight to 25% by weight or even 10% by weight to 23% by weight.

[0034] The hot melt adhesive composition may include a total content of styrenic block copolymer (modified and unmodified) of 6% by weight, 8% by weight, 10% by weight, 12% by weight to 20% by weight, 22% by weight, 25% by weight, 30% by weight, 40% by weight or any two intermediate values. Unmodified Styrene Block Copolymer

[0035] The hot melt adhesive composition includes an unmodified styrenic block copolymer (SBC). By “unmodified” it is understood that the SBC has not been modified / grafted with a functional group capable of participating in hydrogen bonding. The hot melt adhesive composition may include more than one unmodified SBC.

[0036] Unmodified SBC has at least one A block that includes styrene and at least one B block that includes, for example, elastomeric conjugated dienes (e.g., hydrogenated and non-hydrogenated conjugated dienes), sesquiterpenes (e.g., hydrogenated and non-hydrogenated sesquiterpenes), and combinations thereof. The A blocks and the B blocks are linked to each other by any means of linkage, so that the resulting copolymer exhibits a variety of structures, including, for example, random, linear chain, Petition 870250086630, dated 09 / 25 / 2025, p. 67 / 94 9 / 31 branched, radial, star, comb, conical and combinations thereof. The block copolymer may have any shape, including, for example, linear AB block, linear ABA block, linear A-(BA)nB multiblock and radial (AB)nY block, wherein Y is a multivalent compound and n is an integer of at least 3, tetrablock copolymer, for example, ABAB, and pentablock copolymers having an ABABA structure. The adhesive composition may include mixtures of at least two different block copolymers.

[0037] Suitable styrene A blocks include, for example, styrene, alpha-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, p-tert-butylstyrene, 2,4-dimethylstyrene, 2,4,6-trimethylstyrene and combinations thereof.

[0038] Suitable elastomeric block-conjugated B-dienes include, for example, butadiene (e.g., polybutadiene), isoprene (e.g., polyisoprene), 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, 1,3-hexadiene and combinations thereof, and hydrogenated versions thereof, including, for example, ethylene, propylene, butylene and combinations thereof. Suitable B-block sesquiterpenes include, for example, beta-farnesene. The unmodified styrenic block copolymer may have an unsaturated intermediate block; alternatively, the intermediate block may be saturated, i.e., hydrogenated.

[0039] In addition to the elastomeric conjugated diene B blocks, the styrene monomer can be distributed in the intermediate block.

[0040] Useful unmodified SBCs include, for example, poly(styrene b-butadiene) (SB), poly(styrene-b-butadiene-b-styrene) (SBS), poly(styrene-bisoprene) (SI), poly(styrene-b-isoprene-b-styrene) (SIS), poly(styrene-b-(ethyleneco-butylene)-b-styrene) (SEBS), poly(styrene-b-(ethylene-alt-propylene)-b-styrene) (SEPS), poly(styrene-b-isobutylene-b-styrene) (SIBS), poly(styrene-b-(ethylene-cobutylene-co-styrene)-b-styrene) (SEBSS) and combinations thereof.

[0041] Preferred unmodified SBCs include poly(styrene-bisoprene-b-styrene) (SIS), poly(styrene-(ethylene-co-butylene)-b-styrene) (SEBS), poly(styrene-b-(ethylene-alt-propylene)-b-styrene) (SEPS), poly(styrene-bisbutylene-b-styrene) (SIBS), and combinations thereof.

[0042] Unmodified SBC may have a styrene content of 6% by weight, 8% by weight, 10% by weight, 12% by weight, 15% by weight, 17% by weight, Petition 870250086630, dated 09 / 25 / 2025, pp. 68 / 94 10 / 31 20% by weight to 25% by weight, 30% by weight, 35% by weight, 40% by weight, 45% by weight, or any two intermediate values.

[0043] Useful unmodified block copolymers are commercially available under the trade designations KRATON D, including the KRATON D 1118 and KRATON G series from Kraton Corporation, (Houston, Texas), including the VECTOR series from Taiwan Synthetic Rubber Corporation (TSRC) (Taipei City, Taiwan), including VECTOR, and the GLOBALPRENE series from LCY Grit Corp (Taiwan), including GLOBALPRENE 3546.

[0044] The hot melt adhesive composition includes from 5% by weight to 40% by weight, from 10% by weight to 40% by weight, from 10% by weight to 35% by weight, from 10% by weight to 30% by weight, from 12% by weight to 28% by weight, from 5% by weight to 25% by weight, from 8% by weight to 25% by weight, from 10% by weight to 25% by weight, from 8% by weight to 20% by weight, or even from 5% by weight to 15% by weight of an unmodified styrenic block copolymer. Modified Styrene Block Copolymer

[0045] The hot melt adhesive composition includes a modified SBC. The modified SBC included in the hot melt adhesive composition is a modified (more preferably grafted) SBC with a functional group capable of participating in hydrogen bonds (e.g., organic acid (e.g., carboxylic acid), anhydride, amide, amine, urea, carbamate, hydroxyl, carbonate, ketone, alkoxysilane, etc.). The final SBC may or may not contain saturation in the polymer backbone. Such modified styrenic block copolymers can be prepared by conventional methods known in the art.

[0046] Useful modified SBC polymers include modified versions of those described above in the section on unmodified styrenic block copolymers, including, for example, poly(styrene-b-butadiene) (SB), poly(styreneb-butadiene-b-styrene) (SBS), poly(styrene-b-isoprene) (SI), poly(styrene-bisoprene-b-styrene) (SIS), poly(styrene-b-(ethylene-co-butylene)-b-styrene) (SEBS), poly(styrene-b-(ethylene-alt-propylene)-b-styrene) (SEPS), poly(styrene-bisbutylene-b-styrene) (SIBS), poly(styrene-b-(ethylene-co-butylene-co-styrene)-bestyrene) (SEBSS) and combinations thereof. Preferred modified styrenic block copolymers include modified poly(styrene-b-isoprene-b-styrene). Petition 870250086630, dated 09 / 25 / 2025, pp. 69 / 94 11 / 31 (SIS), poly(styrene-(ethylene-co-butylene)-b-styrene) (SEBS), poly(styrene-b(ethylene-alt-propylene)-b-styrene) (SEPS), poly(styrene-b-isobutylene-b-styrene) (SIBS) and combinations thereof.

[0047] The modified SBC polymer can have a structure selected from the group consisting of linear, branched, radial, and combinations thereof. When the modified SBC polymer has a radial structure, it can have 3 to 10 arms, 3 to 8 arms, or even 3 to 6 arms.

[0048] A preferred modified SBC is an SBC grafted with maleic anhydride, having a bound maleic anhydride content of 0.5% by weight to 5% by weight, 0.7% by weight to 3% by weight or even 1.0% by weight to 2.5% by weight.

[0049] The modified SBC polymer may have a styrene content of 6% by weight, 8% by weight, 10% by weight, 12% by weight, 15% by weight, 17% by weight, 20% by weight to 25% by weight, 30% by weight, 35% by weight, 40% by weight, 45% by weight, or any two intermediate values. The modified SBC polymer may have a styrene content of 6% by weight to 15% by weight. Alternatively, the modified SBC polymer may have a styrene content of 25% by weight to 45% by weight.

[0050] In one embodiment, the modified SBC may have a radial structure with 3 to 10 arms, having a hydrogenated intermediate block and a styrene content of 6% by weight to 15% by weight. Alternatively, the modified SBC may have a radial structure with 3 to 10 arms, having a hydrogenated intermediate block and a styrene content of 25% by weight to 45% by weight.

[0051] In one embodiment, the modified SBC may be a maleic anhydride-grafted SBC having a bound maleic anhydride content of 0.5% by weight to 5% by weight, a radial structure with 3 to 10 arms, a hydrogenated intermediate block, and a styrene content of 6% by weight to 15% by weight. Alternatively, the modified SBC may be a maleic anhydride-grafted SBC having a bound maleic anhydride content of 0.5% by weight to 5% by weight, having a radial structure with 3 to 10 arms, having a hydrogenated intermediate block, and a styrene content of 25% by weight to 45% by weight.

[0052] Commercially available useful modified styrene block copolymers are available under the designation KRATON, including KRATON FG1901 and FG1924, both maleic anhydride-modified SEBS polymers. Petition 870250086630, dated 09 / 25 / 2025, pp. 70 / 94 12 / 31 available from Kraton Corporation (Houston, Texas), as TAIPOL, including TAIPOL SEBS 7126 and TAIPOL SEBS 7131, both maleic anhydride-modified SEBS polymers available from TSRC Corporation (Kaohsiung City, Taiwan) and under the name TUFTEC, including TUFTEC M1943, TUFTEC M1911, TUFTEC M1913 — all maleic anhydride-modified and TUFTEC MP110 — amine-modified, all available from Asahi Kasei Chemical (Japan).

[0053] The hot melt adhesive composition includes from 0.5% by weight to 30% by weight, from 2% by weight to 30% by weight, 0.5% by weight to 25% by weight, from 0.5% by weight to 20% by weight, from 2% by weight to 20% by weight, from 0.5% by weight to 15% by weight, from 1% by weight to 15% by weight, from 1% by weight to 13% by weight or even from 2% by weight to 10% by weight of a modified SBC. Sticky Agent

[0054] The hot-melt adhesive composition may include one or more tackifying agents.

[0055] The tackifying agent can function to make the intermediate block of the SBC tacky 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, for example, aromatic, aliphatic and cycloaliphatic hydrocarbon resins, mixed aromatic and aliphatic modified hydrocarbon resins, aliphatic modified aromatic hydrocarbon resins and hydrogenated versions thereof; terpenes, modified terpenes and hydrogenated versions thereof; natural rosin, modified rosin, rosin esters and hydrogenated versions thereof; low molecular weight polylactic acid and combinations thereof.

[0056] The tackifying agent may have an average softening point of Ring and Sphere of 90 °C to 130 °C, 95 °C to 120 °C or even 100 °C to 115 °C.

[0057] The tackifying agent may be a hydrogenated hydrocarbon tackifying agent.

[0058] The hot melt adhesive compositions of this invention may be free of non-hydrogenated tackifying agents (e.g., non-hydrogenated C5 resins). It has been found that non-tapping agents Petition 870250086630, dated 09 / 25 / 2025, pp. 71 / 94 13 / 31 Hydrogenated compounds increase the color and odor and increase degradation at high temperatures of the hot-melt adhesive composition. Hydrogenated hydrocarbon tackifying agents exhibit lower odor and color and have demonstrated greater thermal stability.

[0059] Suitable classes of hydrogenated hydrocarbon tackifying agents include, for example, aliphatic and cycloaliphatic aromatic hydrocarbon resins, aliphatic or cycloaliphatic modified aromatic hydrocarbon resins, terpenes, modified terpenes and combinations thereof. Examples of useful aliphatic and cycloaliphatic petroleum hydrocarbon resins include aliphatic and cycloaliphatic petroleum hydrocarbon resins, including, for example, branched and unbranched C9 and C10 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).

[0060] Preferred classes of hydrogenated hydrocarbon tackifying agents include hydrogenated hydrocarbon resins with aromatic content. Hydrogenated hydrocarbon resins having aromatic content can be selected from the group consisting of modified aromatic hydrocarbon resins and aromatic hydrocarbon resins.

[0061] Useful tacky resins include those available under the trade name ESCOREZ from ExxonMobil Chemical Company, including ESCOREZ 5600 (Molecular Weight - Average Weight (Mw) = 800 g / mol, 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 / mol), and the series of trade names EASTOTAC from Eastman Chemical (Kingsport, Tennessee), including, for example, EASTOTAC H-100R and H-100L. Useful hydrogenated aromatic hydrocarbon resins include the KRISTALEX and PLASTOLYN series of trade names from Eastman Chemical Company (Kingsport, Tennessee), including, for example, KRISTALEX 3100, PLASTOLYN 240 (Mw = 4060, 55% aromatic content) and PLASTOLYN 290 (Mw = 4760).

[0062] The hot melt adhesive composition includes from 20% to 70% by weight, from 30% to 65% by weight, from about 35% to 60% by weight Petition 870250086630, dated 09 / 25 / 2025, pp. 72 / 94 14 / 31% by weight, or even 40% by weight to 60% by weight of hydrogenated hydrocarbon tackifying agent. Plasticizer

[0063] The plasticizer may be liquid at room temperature. The hot-melt adhesive composition may include more than one plasticizer.

[0064] Useful plasticizers include, for example, polybutene, polyisobutylene, polyolefin copolymers (e.g., propyleneethylene copolymers), oligomerized alpha-olefins, oils (e.g., petroleum-based naphthenic oils, paraffinic oils, mineral oils, animal oils, vegetable oils, synthetic oils, oil derivatives, liquid isoprene, glycerol esters of fatty acids and combinations thereof) and combinations thereof.

[0065] Useful and commercially available plasticizers include, for example, plasticizers sold under the NYFLEX series of trade designations from Nynas Corporation (Houston, Texas), including, for example, NYFLEX 222B and NYFLEX 223, KAYDOL OIL from Sonneborn, 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).

[0066] The composition includes from 5% by weight to 50% by weight, from 10% by weight to 50% by weight, from 15% by weight to 45% by weight, from 20% by weight to 45% by weight, or even from 30% by weight to 42% by weight of a plasticizer. Wax

[0067] The hot melt adhesive composition may be wax-free; alternatively, the hot melt adhesive composition may include a limited amount of wax. Useful wax classes include, for example, paraffin waxes, microcrystalline waxes, high-density and low molecular weight polyethylene waxes, polyethylene by-product 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 between 50 °C and 170 °C. The wax can be a propylene-based wax with a Mettler Softening Point (ASTM D 6092) greater than 130 °C, greater than 140 °C, or even greater than 150 °C. Petition 870250086630, dated 09 / 25 / 2025, pp. 73 / 94 15 / 31

[0068] Useful waxes are commercially available from a variety of suppliers, including the EPOLENE N and C series of trade designations from Westlake Chemical Corporation (Houston, Texas), including, for example, EPOLENE N-21, EPOLENE N-15 and EPOLENE C-13, the LICOCENE series of trade designations from Clariant International Ltd. (Muttenz, Switzerland), including, for example, 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 GmGH (Leuna, Germany), including, for example, VISCOWAX 116.

[0069] The hot melt adhesive composition includes less than 5% by weight, less than 4.5% by weight, less than 4% by weight, less than 3.5% by weight, less than 3% by weight, less than 2% by weight, from 0% by weight to 4.5% by weight, from 0% by weight to 4% by weight, from 0% by weight to 3.5% by weight, from 0% by weight to 3%. Optional Components

[0070] The composition may optionally include a variety of additional components, including, for example, fillers, superabsorbents, surfactants, flame retardants, additional polymers (e.g., olefin polymers) and various additives (e.g., coextrusion coatings, packaging film, stabilizers, antioxidants, adhesion promoters, ultraviolet light stabilizers, rheology modifiers, biocides, corrosion inhibitors, dehydrating agents, colorants (e.g., pigments and dyes), optical brighteners and combinations thereof).

[0071] Useful antioxidants include, for example, pentaerythritol tetrakis[3,(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 2,2'-methylene bis(4-methyl-6-tert-butylphenol), phosphites including, for example, tris-(p-nonylphenyl)-phosphite (TNPP) and bis(2,4-di-tert-butylphenyl)4,4'-diphenylene-diphosphonite, distearyl-3,3'-thiodipropionate (DSTDP) and combinations thereof. Useful antioxidants are commercially available under a variety of trade names, including, for example, the IRGANOX series of trade names, including, for example, the hindered phenolic antioxidants IRGANOX 1010, IRGANOX 565 and IRGANOX 1076 and the phosphite antioxidant IRGAFOS 168, all available from BASF Corporation (Florham Park, New Jersey) and ETIL 702 4,4'-methylene bis(2,6-di-tert- Petition 870250086630, dated 09 / 25 / 2025, pp. 74 / 94 16 / 31 butylphenol), and the BNX series of trade designations, including, for example, BNX 1010 and BNX 1076 from Mayzo, Inc. (Suwanee, Georgia). When present, the fusion adhesive composition preferably includes from about 0.1% by weight to about 2% by weight of antioxidant. Uses

[0072] Hot melt adhesive composition is useful in a variety of applications and constructions, including, for example, disposable absorbent articles, including, for example, disposable diapers, adult urinary incontinence products, sanitary napkins, medical dressings (e.g., wound care products), bandages, surgical compresses, pet training pads (e.g., puppy pads) and meat packaging products, and components of absorbent articles, including, for example, an absorbent element, absorbent cores, waterproof layers (e.g., bottom layers), thin paper (“tissue”) (e.g., tissue paper for wrapping), acquisition layers and woven and non-woven blanket layers (e.g., top layers, absorbent tissue paper).

[0073] The hot melt adhesive composition can also be applied to a variety of substrates, including, for example, 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 ethylcellulose, and polyamide films, and combinations thereof), metal foils, removable liners, porous substrates, cellulose substrates, sheets (e.g., paper and fiber sheets), paper products, woven and non-woven blankets, 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 holders.Useful substrates include, for example, single-layer, multi-layer, treated (e.g., corona-treated or chemically primed) and untreated substrates, and combinations thereof. Applications in a Disposable Absorbent Item Petition 870250086630, dated 09 / 25 / 2025, pp. 75 / 94 17 / 31 Positioning

[0074] The pressure-sensitive hot-melt adhesive compositions of this invention are useful as a positioning adhesive disposed on at least one substrate surface of a suitable absorbent article and can be used to position an absorbent article on a garment, such as underwear. Such absorbent articles include, for example, feminine hygiene articles such as sanitary napkins and panty liners, diapers, disposable garments having an opening at the waist and openings at the legs, and articles for urinary incontinence in adults.

[0075] In a construction, the disposable absorbent article (e.g., a feminine hygiene article) includes a garment-facing surface and a body-facing surface, a top layer having a garment-facing surface and a body-facing surface, a bottom layer having a garment-facing surface and a body-facing surface, and optionally, an absorbent core disposed between the body-facing surface of the bottom layer and the garment-facing surface of the top layer. The absorbent core may be optional, as for absorbent articles with limited absorbency, a specific top layer, for example, a top layer with increased height, may also serve as the absorbent portion of the article.

[0076] The top layer defines a body-facing surface of the absorbent article. The absorbent core is positioned internally from the outer periphery of the absorbent article. The absorbent structure includes a body-facing surface and a garment-facing surface positioned adjacent to the bottom layer. The positioning adhesive composition is disposed between a removable liner and the bottom layer, which is permanently bonded to the absorbent core by means of a permanent adhesive composition. The top layer is permanently bonded to the absorbent core by means of a discontinuous permanent adhesive composition. The top layer and the bottom layer are joined, and the sealed edges of the top layer and the bottom layer define an overall sealed peripheral edge of the article. The absorbent article may have any suitable shape and size. Petition 870250086630, dated 09 / 25 / 2025, pp. 76 / 94 18 / 31

[0077] The top layer is designed to come into contact with the user's body and is permeable to liquids. The exposed surface of the liquid-permeable top layer is designed to receive aqueous bodily fluids, which will then be directed away from the user's body and towards the absorbent core. The top layer is constructed of any suitable material that is easily penetrated by bodily exudates. The top layer optionally includes a plurality of openings formed throughout it to allow bodily fluid to pass more easily to the absorbent core.

[0078] The backing layer is impermeable to liquids and designed to face the inner surface, i.e., the crotch area of ​​a wearer's garment (e.g., underwear). The backing layer is optionally constructed to allow air or vapor to pass out of the absorbent article (e.g., a vapor-permeable layer) while still blocking the passage of liquids.

[0079] The pressure-sensitive hot-melt adhesive composition is disposed on the surface facing the garment of the absorbent article, generally, or even on the surface facing the garment of the backing layer. A removable liner is optionally disposed on the pressure-sensitive hot-melt adhesive 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 have additional functionality. Examples of additional layers, functionalities, and combinations thereof include dust removal, absorption, acquisition, additional top layers, multiple core layers, particles and superabsorbent compositions, moisture indicators, and combinations thereof.

[0080] Two common fabrics currently used, to which placement adhesives need to adhere, are cotton and microfiber. Cotton fabric refers to a woven fabric made from 100% cotton fiber. Microfiber is a fabric created with synthetic fibers having a diameter of less than ten micrometers and tightly woven. Various chemical compositions (usually materials Petition 870250086630, dated 09 / 25 / 2025, pp. 77 / 94 19 / 31 polar fleeces (such as polyester, polyamides, etc.) can be used to create microfiber fabrics. Core Stabilization

[0081] The hot-melt adhesive 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).

[0082] The absorbent core includes the core and, optionally, a core wrap. The absorbent core can be manufactured on the assembly line (i.e., in the disposable absorbent article). Alternatively, the core can be manufactured offline and then worked or embellished for later use or at a different location. The core can vary in design, shape, and materials used. It can be shaped like a long rectangle or a dog bone. It can be a continuous shape or divided into channels formed, for example, by the top layer and the bottom layer.

[0083] The core is usually centered within the article and firmly held between the top layer and the bottom layer by means of a fastening medium (e.g., an adhesive).

[0084] The core includes absorbent materials capable of absorbing bodily fluids and solids received through the top layer. The core may include cellulose fibers (i.e., down), wood pulp, cotton, synthetic fibers, nonwovens, thin paper, foam, superabsorbent polymers (e.g., polyacrylates), or any other absorbent material.

[0085] The absorbent core may comprise less than 10% by weight of down or even be entirely free of down. In a core with little or no down, the absorbent core comprises the hot-melt adhesive composition and the superabsorbent polymer and, optionally, layers of nonwoven and / or thin paper.

[0086] The core may be a composite core. A composite core may comprise less than 10% by weight of down or even be entirely down-free. A composite core includes more than one layer of SAP alternating with layers of nonwoven or thin paper and the hot-melt adhesive composition. The composite core may include from 1 to 5, or even more than Petition 870250086630, dated 09 / 25 / 2025, pp. 78 / 94 20 / 31 to 4 individual layers of SAP, alternating with hot-melt adhesive composition and non-woven or thin paper.

[0087] The core envelope can be any material that surrounds the core to hold the core components in place. The core envelope usually encloses the two longer sides of the core, leaving the ends open. The core envelope can be selected from the group consisting of nonwoven and thin paper.

[0088] Hot melt adhesive composition can be used to hold absorbent materials in place in both the dry (unexpanded) and wet (swollen) states.

[0089] The absorbent core can be used in a variety of disposable absorbent articles, including, for example, disposable diapers, adult urinary incontinence products, sanitary napkins, medical dressings (e.g., wound care products), bandages, surgical compresses, pet training pads (e.g., puppy pads) and meat packaging products. Construction

[0090] The hot melt adhesive composition can be additionally used for construction applications. In a typical construction application in the manufacture of a disposable absorbent article, a body fluid impermeable backing layer is bonded to a nonwoven substrate. In other construction applications, a nonwoven substrate is bonded to a nonwoven substrate. The hot melt adhesive composition can also be used to bond at least one additional layer or material selected from the group consisting of absorbents, fabrics, elastomeric materials, superabsorbent polymers and combinations thereof. For example, the hot melt adhesive composition can additionally be used for lamination of the backing layer, i.e. where the body fluid impermeable backing layer is typically a polyolefin film (e.g., polyethylene, polypropylene, ethylene vinyl acetate, ethylene copolymer, etc.).) - it is glued to a second non-woven layer to improve the feel of the disposable item. Elastic Fastening Petition 870250086630, dated 09 / 25 / 2025, pp. 79 / 94 21 / 31

[0091] Hot melt adhesive composition can be used for elastic bonding applications, which include bonding elastic material (e.g., yarn, film, etc.) to a component of the disposable absorbent article. The elastic material can be coated with the hot melt adhesive composition while stretched and then bonded to a film (e.g., polyethylene, polypropylene, etc.) or to a non-woven substrate. The elastic material coated with the hot melt adhesive composition can also be bonded between two such substrates. This process results in creep-resistant crimps after the tension is removed.

[0092] The adhesive can alternatively be applied to the film or nonwoven substrate and then,

[0093] the elastic material glued to it. The hot melt adhesive can be used as an elastic fastening adhesive in forming the flap / ear of the disposable absorbent article. Alternatively, the hot melt adhesive can also be used as an elastic fastening adhesive to help make the leg holes or waistband of the disposable absorbent article elastic. Additional Applications

[0094] In addition to various applications in disposable absorbent articles, the hot-melt adhesive compositions of this invention can also be used for skin bonding applications (e.g., medical tapes and bandages, wearable devices (e.g., colostomy bags), sports and kinesiology tapes, wound dressings, etc.), as an adhesive in various tapes and for attaching labels to various items, including, for example, containers, and for any application requiring adhesion to different substrates.

[0095] Hot melt adhesive composition is useful in various forms, including, for example, as a coating (e.g., continuous and discontinuous coatings (e.g., random, patterned, matrix, spiral, dot, spot and combinations thereof), film (e.g., continuous films and discontinuous films), spheres, sheets, fibers, filaments, mats (e.g., woven and non-woven), and combinations thereof.

[0096] Various application techniques can be used to apply the adhesive composition to a substrate, including, for example, crevice coating, spraying (e.g., spiral spraying and spraying). Petition 870250086630, dated 09 / 25 / 2025, pages 80 / 94 22 / 31 random), screen printing, foam forming, roller engraving, extrusion, melt blow adhesive application techniques and combinations thereof.

[0097] The invention will now be described by means of the following examples. Examples Testing Procedures

[0098] Test procedures include the following. All ratios and percentages are by weight unless otherwise indicated. Procedures are performed at room temperature (i.e., an ambient temperature of about 20°C to about 25°C) unless otherwise indicated. The properties stated for the components used in the compositions are as reported by the manufacturer unless otherwise specified. Brookfield Viscosity Test Method

[0099] 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 Model RVDV 2 viscometer and a spindle number 27. Results are expressed in centipoise (cP) and the test is performed at the specified temperature. Sample Preparation Method for Peel-Off Strength Testing of Cotton and Microfiber

[0100] A laminate is prepared by coating a sample composition onto a silicone-coated removable paper in a (2.5 cm (1 in.)) wide pattern with an additional weight of 20 grams per square meter (g / m2) (+ / - 3 g / m2) using a slotted applicator and then placing the adhesive strip in contact with the treated side of a (0.025 mm (1 mil)) thick polyethylene film to form a silicone-coated removable paper / adhesive / polyethylene film laminate. Test samples with a length of (10.16 cm (4 in.)) in the machine direction and (3.81 cm (1.5 in.)) in the cross-machine direction are then cut from the laminate so that the adhesive pattern is centered in the cross-machine direction of the test sample.

[0101] For cotton bindings, a sheet of bleached cotton fabric for T-shirts weighing 124 g / m2 (Testfabrics, Inc., West Pittston, Pennsylvania) is cut into strips with a length of (10.16 cm (4 in.)) Petition 870250086630, dated 09 / 25 / 2025, pp. 81 / 94 23 / 31 machine direction and width of (3.81 cm (1.5 in.)) in the cross-machine direction. Before cutting the cotton fabric, the weave of the fabric seam is examined. When the cotton fabric is stretched, the sample will show greater elongation in one direction than in another. The cotton fabric is cut lengthwise in the direction that shows the least elongation. All strips of cotton fabric are cut as straight as possible along the weave of the seam. If the strips of cotton fabric are cut obliquely, inconsistent elongation of the cotton fabric test sample will occur.

[0102] The removable film is removed from the adhesive and the adhesive side of each test sample is carefully placed on the surface of a cotton strip, so that the cotton wraps (lengthwise) towards the adhesive bond to form the composite test sample. When preparing the composite test sample, the adhesive is not pressed onto the cotton fabric.

[0103] For the microfiber, a LUCERO polymeric microfiber sheet made of 70% polyamide and 30% elastomer, with a basis weight of 135 g / m2 (Termileniao SA), is used. Before testing, the fabric is first washed without detergent and then cut into strips of (5.08 cm (2 in.)) by (20.32 cm (8 in.)), with the long edge following the fabric lines to prevent stretching.

[0104] Care is taken to cut each (20.32 cm (8 in.)) strip in half, creating two (10.16 cm (4 in.)) long strips. Then, one of these strips is turned over to reveal the other side of the fabric. A sample of adhesive is placed on each of the (10.16 cm (4 in.)) strips, ensuring that an equal number of adhesive samples are made on each side of the fabric. Peel-Off Strength Test Method for Cotton and Microfiber

[0105] At least five samples are prepared according to the Sample Preparation Method for Peel Strength. The test sample is placed in a 2 kg mechanical rolling device and the roller is passed over the film side of the sample twice, once forward and once backward, at a speed of 305 mm / min. A timer is then activated and the sample is placed in the grips of the INSTRON type peel tester. The Petition 870250086630, dated 09 / 25 / 2025, pp. 82 / 94 24 / 31 A polyethylene film is placed in the movable gripper and the fabric is fixed in the stationary gripper. Within one minute after the sample has been removed from the rolling device, it is tested according to ASTM D1876-01, entitled “Test Method for Determining the Peel Strength of Adhesives (T-Bearing Test Method)”, except that the test is performed at a speed of 305 mm / min instead of 250 mm / min, for a period of ten seconds, and at least five replicates are performed instead of the ten specified in ASTM D1876. The average peel strength over ten seconds of peeling is recorded, and the results are reported in newtons / cm.

[0106] The detachment force is measured 24 hours after the preparation of the test sample. Moisture-Incubated Detachment Test Method

[0107] Fabric laminates were prepared according to the test method above. The laminates were incubated in a Thermotron oven at 40 °C and 90% relative humidity for 2 hours. The peel test (305 mm / min) was performed on each laminate within 10 minutes after removal from the Thermotron. Sample Preparation for 180° Peelback Adhesion on HDPE or Stainless Steel

[0108] This test method is used to determine the 180° peel-off adhesion value of a PSA (including Semi-Removable PSA and Ultra-Removable PSA) to a high-density polyethylene (HDPE) or stainless steel panel. Sample laminates are prepared using a benchtop roll-to-roll laminator. The adhesive was applied at 149°C using a slot applicator onto an untreated PET (Mylar) film, using a shim of (0.051 mm (2 mil)) and bonded to the peel-off treated PET (Mylar) film to form the laminate. The laminates are cut into strips of (25 mm x 200 mm (1 in. x 8 in.)) in the machine direction. The HDPE or stainless steel test panels were cleaned with toluene and isopropyl alcohol. The removable PET liner is removed. Three samples are laid lengthwise on the HDPE or stainless steel panels so that (125 mm (5 in.)) of the adhesive strip is in contact with the panel.The sample is rolled back and forth three times with a 2 kg roller to ensure there are no air bubbles or creases. The samples are then left in place. Petition 870250086630, dated 09 / 25 / 2025, pages 83 / 94 25 / 31 conditioning for one minute before the detachment test. 180° Peelback Adhesion Test Method for HDPE or Stainless Steel

[0109] 180° peel adhesion is measured using an INSTRON-type peel adhesion tester. The HDPE or stainless steel plate is clamped in the lower jaws so that the sample “free tab” faces downwards. The upper jaws of the INSTRON (attached to the load cell) are used to clamp the sample free tab. The peel force (N) is measured with the crosshead moving at a speed of 305 mm / min, according to PSTC 101 entitled “Pressure-Sensitive Tape Peel Adhesion”. The values ​​presented are an average of at least three replicates. Stickiness Strength of Loop for HDPE or Stainless Steel Sample Preparation

[0110] The laminates are coated and prepared according to the same method described above for “180° Peel-Off Adhesion for HDPE or Stainless Steel Sample Preparation”. The laminates are cut into test strips (125 mm (5 inches)) in the machine direction. The test panels (HDPE or stainless steel) are cleaned with toluene and isopropyl alcohol. Test Method for the Stickiness Strength of Bonding for HDPE or Stainless Steel

[0111] Loop tack strength is measured using an INSTRON-type peel tester with a clamping jaw attached to the load cell on the upper crosshead and a loop clamping device attached to the base. The HDPE or stainless steel plate is clamped in the loop clamping device so that it lies flat. The test laminate support is removed and the loop is prepared by stapling a piece of paper between the ends of the loop, with the adhesive facing outwards. The stapled end of the loop is fitted into the upper jaws of the INSTRON. The sample is lowered onto the HDPE or stainless steel plate until an area of ​​(25 mm x 25 mm (1 in. x 1 in.)) of the test plate is fully covered by the exposed adhesive. To measure the loop tack value, the crosshead is moved upwards at a speed of 305 mm / min, and the peak force is recorded in N. The values ​​presented are an average of at least three replicates. Petition 870250086630, dated 09 / 25 / 2025, pages 84 / 94 26 / 31 Method for Preparing Test Samples for Detachment Strength of the “Core” from Non-Woven Substrates, Cotton, and Cellulosic Towels

[0112] A laminate is prepared by coating a sample composition onto an 8 grams per square meter (g / m2) worked hydrophilic nonwoven (Avgol Americas, Mocksville, NC) pattern 7.62 cm (3 in.) wide with an additional weight of 5 g / m2 (+ / - 0.5 g / m2) using a slotted applicator. The adhesive strip then contacts one of three substrates: 1) an identical hydrophilic nonwoven, bonded as the second worked substrate; 2) a 124 g / m2 bleached cotton fabric sheet for T-shirts (Testfabrics, Inc., West Pittston, Pennsylvania), having a length of 50.8 cm (20 in.) in the machine direction and a width of 20.3 cm (8 in.) in the cross-machine direction. This cotton sheet contacts the adhesive strip and is sandwiched between another layer of nonwoven; 3) A heavy-duty cellulose towel (Wypall, Kimberly-Clark, Irving, Texas) is cut into squares with a length and width of (15.2 cm (6 in.)).This cellulosic towel comes into contact with the adhesive tape and is sandwiched between another layer of nonwoven material. The weaving speed of the hydrophilic nonwoven material is 160 m / min (525 ft / min). The laminates are not subjected to compression by pinching, but rather to tension on two "s-wrap" type wrapping rolls. The weaving tension on each substrate was 0.25 pounds per linear inch (PLI, or 44 N / m).

[0113] The laminates for peel-off testing were prepared in two ways: 1) Non-woven-nonwoven laminates were cut in the transverse direction of the machine so that the adhesive strip in the machine direction (7.6 cm (3 in)) wide) was approximately (12.7 cm (5 in)) long. Paper flags were dropped perpendicularly onto the blanket during the coating process to ensure a clean start for the peel-off test. Non-woven-cotton and non-woven-cellulosic towel laminates were cut in the transverse direction of the machine using a precision cutter to a width of (3.8 cm (1.5 in)) and an adhesive length of (7.6 cm (3 in)). Petition 870250086630, dated 09 / 25 / 2025, pages 85 / 94 27 / 31 Method for Preparing Test Samples for Laminating a Bottom Layer on Non-Woven and Polyethylene Film

[0114] A laminate is prepared by coating a sample composition onto a hydrophobic nonwoven (12.7 cm (5 in.) wide, 14 g / m2 basis weight, Unipro) with a pattern width of (7.6 cm (3 in.)) and an additional basis weight of 3 grams per square meter (g / m2) (+ / - 0.25 g / m2) using a slotted applicator and then placing the adhesive strip in contact with a corona-treated non-breathable polyethylene film ((15.24 cm (6 in.))) wide, 18 g / m2, Berry Global, Evansville, IN). The weaving speed is (160 m / min (525 ft / min)). The laminates are not subjected to compression by squeezing, but rather to tension on two “s-wrap” type packaging rolls. The weave tension on each substrate was 0.25 pounds per linear inch (PLI, or 44 N / m).

[0115] The laminates for peel-off testing were prepared so that the adhesive strip (7.6 cm (3 in.)) in the machine direction was approximately (15.24 cm (6 in.)) long. Paper flags were dropped onto the blanket during the coating process to ensure a clean start to the peel-off test. Dry Peel-Off Strength Test Method for Hydrophilic Nonwoven Fabrics, Cotton, and Cellulosic Towels

[0116] At least 8 samples of nonwoven-nonwoven laminate are prepared according to the specified method (4 samples above on the blanket in the machine direction from the flag, 4 samples below on the blanket). The sample is placed in the grips of the INSTRON type peel tester. The “bonding side” of each laminate (hydrophilic nonwoven, cotton or cellulose towel) is placed in the moving grip, and the “coating side” of each laminate (hydrophilic nonwoven) is fixed in the stationary grip. The sample is tested according to ASTM D1876-01, entitled “Test Method for Determining the Peel Resistance of Adhesives (T-Bear Test Method)”, except that the test is run at a speed of 305 mm / min instead of 250 mm / min, for a period of ten seconds, and at least five replicates are performed instead of the ten specified in ASTM D1876. The average detachment force over ten seconds of Petition 870250086630, dated 09 / 25 / 2025, pages 86 / 94 28 / 31 peel strength is recorded, and the results are reported in Newtons / cm (N / cm). The above test method was used to measure peel strength for nonwoven cotton nonwoven cellulose towel laminates, with the exception that five replicates of each type were performed instead of the ten specified in ASTM D1876.

[0117] The dry peel strength is measured 24 hours after preparation of the test laminate. Wet Peel-Off Strength Test Method for Hydrophilic Nonwoven Fabric, Cotton, and Cellulosic Towels

[0118] At least 8 samples of nonwoven-nonwoven are prepared according to the specified method (4 samples above on the blanket in the direction of the machine from the flag, 4 samples below on the blanket). Each laminate is completely submerged in a 0.9% w / w saline solution for 3 minutes. Each laminate is then placed in a drainer (not stacked) to drip dry for 5 minutes before measuring the peel strength. A timer is then activated and the sample is placed in the grips of the INSTRON type peel strength tester. Each laminate is tested for peel strength within 5 minutes after the completion of the drip drying step. The “bonding side” of each laminate (hydrophilic nonwoven, cotton or cellulose towel) is placed in the moving grip, and the “coating side” of each laminate (hydrophilic nonwoven) is fixed in the stationary grip.The sample is tested according to ASTM D1876-01, entitled “Test Method for Determining the Peel Strength of Adhesives (T-Test Method)”, except that the test is performed at a speed of 305 mm / min instead of 250 mm / min, for a period of ten seconds, and at least five replicates are performed instead of the ten specified in ASTM D1876. The average peel strength over ten seconds of peel strength is recorded, and the results are reported in Newtons / cm. The above test method was used to measure the peel strength for nonwoven cotton nonwoven towel cellulosic laminates, except that five replicates of each type were performed instead of the ten specified in ASTM D1876. Petition 870250086630, dated 09 / 25 / 2025, pages 87 / 94 29 / 31

[0119] Wet peel strength is measured 24 hours after preparation of the test laminate. Peel Strength Test Method for “Bottom Layer Lamination” of Non-Woven Polyethylene Film

[0120] At least 8 samples of nonwoven polyethylene film are prepared according to the specified method (4 samples above on the blanket in the direction of the machine from the flag, 4 samples below on the blanket). The sample is placed in the grips of the INSTRON type peel tester. The “bonding side” (polyethylene film) of each laminate is placed in the moving grip, and the “coating side” of each laminate (hydrophobic nonwoven) is fixed in the stationary grip. The sample is tested according to ASTM D1876-01, entitled “Test Method for Determining the Peel Resistance of Adhesives (T-Bear Test Method)”, except that the test is run at a speed of 305 mm / min instead of 250 mm / min, for a period of ten seconds, and at least five replicates are performed instead of the ten specified in ASTM D1876.The average detachment force over ten seconds of detachment is recorded, and the results are reported in Newtons / cm.

[0121] The initial dry peel strength is measured 24 hours after preparation of the test laminates. The aged peel strength is measured after subjecting an identical set of laminates to accelerated aging at 49 °C for 28 days. The aged laminates are then conditioned in a room conforming to ASTM D1876 for at least 1 hour before performing the peel test.

[0122] The adhesive compositions were prepared by combining and mixing the components under nitrogen in the quantities indicated in Tables 1 and 2 in a sigma blade mixer operating at 177 °C. The adhesive compositions were then tested according to various test methods. These results are presented in Tables 1 and 2 below. Table 1

[0123] Control 1 is an SBC-based placement adhesive that does not include a modified SBC. NT (Not Tested) Petition 870250086630, dated 09 / 25 / 2025, pages 88 / 94 30 / 31 Control 1 Ex 1 Ex 2 Ex 3 Ex 4 Ex 5 Ex 6 Ex 7 Ex 8 GLOBALPRENE 3546 13 12 8 11 8 8 8 5 KRATON D1118 4 5 TAIPOL 7126 4 5 5 4 5 4 3 5 ESCOREZ 5400 52.5 52.5 52.5 53.5 49.5 50.5 ESCOREZ 5637 47 49 CALSOL 5550 29 29 32 30 35 35 36 34 VISCOWAX 116 1 1 1 ADDITIVES 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 SBC - Average styrene content (% by weight) 38 37 36 37 36 37 33 30 SBC- Average Diblock Content (% by weight) 0 0 0 0 0 0 20.8 21.7 Brookfield Viscosity at 121 °C (cP) 7075 6188 2460 4650 2255 1778 4800 9200 Brookfield Viscosity at 135 °C (cP) 3750 3105 1365 2515 1192 1013 1995 4055 Brookfield Viscosity at 149 °C (cP) 2099 1845 775 1398 692.5 607.5 1043 2180 Brookfield Viscosity at 163 °C (cP) 1230 1110 490 847.5 437.5 380 NT 1303 Cotton Initial Detachment (N / cm) 1.44 1.10 1.13 0.97 1.21 0.88 0.87 1.37 1.43 Detachment Incubated with Moisture (N / cm) 1.01 1.16 4.06 1.36 1.46 0.96 0.92 1.68 2.05 % Change -29.8 5.4 42.0 40.7 21.2 9.4 5.0 22.2 43.6 Microfiber Initial Detachment (N / cm) 0,78 NT NT NT NT NT NT 0.67 0.65 Detachment Incubated with Moisture (N / cm) 0.75 NT NT NT NT NT NT 0.82 1.08 % Change -4.8% NT NT NT NT NT NT 22.4 66.2 Stainless Steel (2 mils) Loop Stickiness (N / cm) NT NT NT NT NT NT NT NT 11.9 180° Detachment (N / cm) NT NT NT NT NT NT NT NT 12.6 HDPE (2 mils) Loop Stickiness (N / cm) NT NT NT NT NT NT NT NT 8.3 180° Detachment (N / cm) NT NT NT NT NT NT NT NT 12. Table 2

[0124] Control 2 is an SBC core adhesive that does not include a modified SBC. | Control 2 | Exodus 9 | Exodus 10 | Exodus 11 Petition 870250086630, dated 09 / 25 / 2025, pp. 89 / 94 31 / 31 VECTOR 4211 6 6 6 KRATON FG1924 6 5 TAIPOL 7126 6 VECTOR 4114A 6 7 6 ESCOREZ 5400 60 60 60 CALSOL 5550 20 20 20 ANTIOXIDANT 2.0 2.0 2.0 SBC - Average styrene content (% by weight) 21 21 21 25 SBC - Average diblock content (% by weight) 14 14 16.3 14 Brookfield viscosity at 121 °C (cP) 10780 NT NT NT Brookfield viscosity at 135 °C (cP) 5238 6813 7775 5425 Brookfield viscosity at 149 °C (cP) 2885 3720 4100 2700 Brookfield Viscosity at 163 °C (cP) 1800 2225 2400 1505 Core Detachment Force - NW / NW Initial Dry Detachment (N / cm) 0.28 0.83 NT NT Initial Wet Detachment (N / cm) 0.36 1.04 NT NT Core Detachment Force - NW / Cotton Initial Dry Detachment (N / cm) 0.09 0.29 NT NT Initial Wet Detachment (N / cm) 0.03 0.06 NT NT Core Detachment Force - NW / Towel Initial Dry Detachment (N / cm) 0.11 0.31 NT NT Wet Detachment Initial (N / cm) 0.10 0.20 NT NT Bottom Layer Lamination Initial Detachment (N / cm) - 3 g / m2 0.61 0.81 0.81 0.82 Aged Detachment (N / cm) - 3 g / m2 0.23 0.47 0.54 0.51

[0125] Other modalities are found in the claims. Petition 870250086630, dated 09 / 25 / 2025, pp. 90 / 94

Claims

1 / 3 CLAIMS 1. Hot melt adhesive composition, CHARACTERIZED in comprising: i) from 5% by weight to 40% by weight of an unmodified styrenic block copolymer; ii) from 0.5% by weight to 15% by weight of a modified styrenic block copolymer; iii) from 30% by weight to 65% by weight of a tackifying agent; and iv) from 10% by weight to 45% by weight of a plasticizer, wherein the hot melt adhesive composition comprises less than 5% by weight of a wax.

2. Hot melt adhesive composition according to claim 1, CHARACTERIZED in that the modified styrenic block copolymer is a styrene block copolymer modified with an organic acid or anhydride, selected from the group consisting of poly(styrene-b(ethylene-co-butylene)-b-styrene and poly(styrene-b-(ethylene-alt-propylene)-b-styrene) and poly(styrene-b-isobutylene-b-styrene).

3. Pressure-sensitive hot-melt adhesive composition, CHARACTERIZED in comprising the hot-melt adhesive composition as defined in any one of claims 1 to 2.

4. Hot melt adhesive composition according to any one of claims 1 to 3, CHARACTERIZED in that it comprises: i) from 1% by weight to 10% by weight of modified styrenic block copolymer; ii) from 15% by weight to 45% by weight of plasticizer, and wherein the tackifying agent is a hydrogenated hydrocarbon, the plasticizer is an oil and the hot melt adhesive composition is a pressure-sensitive adhesive.

5. Hot-melt adhesive composition according to any one of claims 1 to 4, CHARACTERIZED in that the total of the unmodified styrenic block copolymer and the modified styrenic block copolymer has an average styrene content of 25% by weight to 45% by weight and an average diblock content of 10% by weight to 25% by weight. Petition 870250086630, dated 09 / 25 / 2025, pp. 92 / 94 2 / 3 6. Hot melt adhesive composition according to any one of claims 1 to 5, CHARACTERIZED in that the total of the unmodified styrenic block copolymer and the modified styrenic block copolymer has an average styrene content of 15% by weight to 30% by weight and an average diblock content of 10% by weight to 25% by weight.

7. Disposable absorbent article, CHARACTERIZED by comprising the hot-melt adhesive composition as defined in any one of claims 1 to 6.

8. Article, CHARACTERIZED by being selected from the group consisting of medical tape, bandage, wearable device, athletic tape, kinesiology tape and wound dressing comprising the hot-melt adhesive composition as defined in any one of claims 1 to 6.

9. Hot-melt adhesive composition according to any one of claims 1 to 6, CHARACTERIZED in that the initial detachment from cotton does not decrease when tested according to the Moisture-Incubated Detachment Test Method.

10. Hot-melt adhesive composition according to any one of claims 1 to 6 and 9, CHARACTERIZED in that it comprises less than 4% by weight of a wax.

11. Hot-melt adhesive composition according to any one of claims 1 to 6 and 9 to 10, CHARACTERIZED in that it has a Brookfield viscosity at 121 °C of not more than 15,000 cP.

12. Hot melt adhesive composition according to any one of claims 1 to 6 and 9 to 11, CHARACTERIZED in that the modified styrenic block copolymer has a radial structure with 3 to 10 arms, a hydrogenated intermediate block and a styrene content of 6% by weight to 15% by weight.

13. Hot-melt adhesive composition according to any one of claims 1 to 6 and 9 to 12, CHARACTERIZED in that the modified styrenic block copolymer has a radial structure with 3 to 10 arms, a hydrogenated intermediate block and a styrene content of 25% by weight to 45% by weight. Petition 870250086630, dated 09 / 25 / 2025, pp. 93 / 94 3 / 3 14. Hot melt adhesive composition according to any one of claims 1 to 6 and 9 to 13, CHARACTERIZED in that it has a total styrenic block copolymer content of 8% by weight to 25% by weight.

15. Hot-melt adhesive composition according to any one of claims 1 to 6 and 9 to 14, CHARACTERIZED in that the modified styrenic block copolymer, the styrenic block copolymer, the tackifying agent and the plasticizer comprise at least 90% by weight of the hot-melt adhesive composition. Petition 870250086630, dated 09 / 25 / 2025, pp. 94 / 94