Patent US5342858A successfully refreshed from Google Patents.
US5342858A
Expired / Lapsed
US
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Elastomeric adhesive foam
Assignee: Procter and Gamble Co
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Filing: 1993-06-30
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Granted: 1994-08-30
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Expires: 2013-06-30
Abstract
Abstract An elastomeric, hot-melt adhesive foam is disclosed. The adhesive foam preferably comprises an elastomeric, hot-melt adhesive material formed from: (a) about 15% to about 60%, by weight of the adhesive material, of an A-B-A block copolymer, in which the A block is derived from styrene and the B block is derived from butadiene or isoprene; (b) about 30% to about 70%, by weight of the adhesive material, of an aromatic modified hydrocarbon resin which associates with both the B block and A blocks of the A-B-A block copolymer; and (c) 0 to about 30%, by weight of the adhesive material, of a processing oil. The proportions of the components (a), (b), and (c) are selected such that the elastomeric, hot-melt adhesive material has a viscosity of less than about 200,000 centipoise at 325 DEG F. and an elastomeric retention value of at least 75%. The adhesive material is preferably pressure-sensitive so as to allow lamination of the solified foam comprising the adhesive material with components of absorbent articles without the need for external bonding agents. Also disclosed is a method of making the elastomeric adhesive foam and of elasticizing structures and absorbent articles with the foam. The adhesive foam and structures incorporating same are particularly useful in disposable absorbent articles such as diapers, training pants, incontinent devices, and the like.
Inventors
- 👤 John J. Litchholt
- 👤 Richard W. Lodge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:12
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30; C09; C09J; C09J153/00; C09J153/02; C09J5/00; C09J5/08; C08J2353/00; C08J2353/02; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/28; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24025; Y10T442/00; Y10T442/60; Y10T442/647; Y10T442/651
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
115 words
An elastomeric, adhesive foam comprising an elastomeric, hot-melt, adhesive material having cells; said adhesive material comprising: (a) an A-B-A block copolymer, wherein the A block is an alkenylarene polymer and the B block is selected from the group consisting of (i) a polymer of a 4 to 6 carbon conjugated aliphatic diene and (ii) a polymer of a linear 2 to 6 carbon alkene; (b) an aromatic modified hydrocarbon resin which associates with both the A blocks and the B block of said copolymer, said resin being a single resin vehicle selected from the group consisting of aromatic petroleum hydrocarbon resins and hydrogenated versions of aromatic petroleum hydrocarbon resins; and (c) optionally a processing oil.
Claim 2
Dependent Claim
115 words
An elastomeric, adhesive foam comprising an elastomeric, hot-melt, adhesive material having cells; said adhesive material comprising: (a) an A-B-A block copolymer, wherein the A block is an alkenylarene polymer and the B block is selected from the group consisting of (i) a polymer of a 4 to 6 carbon conjugated aliphatic diene and (ii) a polymer of a linear 2 to 6 carbon alkene; (b) an aromatic modified hydrocarbon resin which associates with both the A blocks and the B block of said copolymer, said resin being a single resin vehicle selected from the group consisting of aromatic petroleum hydrocarbon resins and hydrogenated versions of aromatic petroleum hydrocarbon resins; and (c) optionally a processing oil.
Claim 3
Dependent Claim
25 words
The foam of claim 1 wherein the A block of said copolymer comprises styrene and the B block of said copolymer comprises butadiene or isoprene.
Claim 4
Dependent Claim
25 words
The foam of claim 2 wherein said copolymer has a styrene content of about 15% to about 50% of the total weight of the copolymer.
Claim 5
Dependent Claim
12 words
The foam of claim 3 wherein said copolymer is substantially fully coupled.
Claim 6
Dependent Claim
48 words
The foam of claim 4 wherein said adhesive material comprises about 15 weight % to about 60 weight % of said copolymer; about 30 weight % to about 70 weight % of said aromatic modified hydrocarbon resin; and up to about 30 weight % of said processing oil.
Claim 7
Dependent Claim
20 words
The foam of claim 5 wherein said adhesive material additionally comprises up to about 1 weight % of a stabilizer.
Claim 8
Dependent Claim
14 words
The foam of claim 6 wherein said adhesive material additionally comprises a nucleating agent.
Claim 9
Dependent Claim
31 words
The foam of claim 7 wherein said adhesive material has a viscosity of less than about 200,000 centipoise at 325° F. and an elastomeric retention value of at least about 75%.
Claim 10
Dependent Claim
25 words
The foam of claim 8 wherein said adhesive material has a tensile strength of at least about 5 psi at 40% elongation at 25° C.
Claim 11
Dependent Claim
13 words
The foam of claim 1, 5, or 9 wherein said foam is pressure-sensitive.
Claim 12
Dependent Claim
30 words
The foam of claim 10 wherein said foam has at least about 5% compression at 1 psi and a resilience alter compression at 1 psi of at least about 90%.
Claim 13
Dependent Claim
127 words
An elastomeric, adhesive foam comprising an elastomeric, hot-melt, pressure-sensitive adhesive material having cells; said adhesive material comprising: (a) about 45 weight % of a styrene-isoprene-styrene block copolymer; (b) about 40 weight % of an aromatic modified hydrocarbon resin which associates with both the isoprene block and the styrene blocks of said copolymer, said resin being a single resin vehicle selected from the group consisting a of aromatic petroleum hydrocarbon resins and hydrogenated versions of aromatic petroleum hydrocarbon resins; (c) about 14 weight % of a processing oil; and (d) about 1 weight % of a stabilizer; said adhesive material having a viscosity of less than about 200,000 centipoise at 325° F. and a tensile strength of at least about 5 psi at 40% elongation at 25° C.
Claim 14
Dependent Claim
127 words
An elastomeric, adhesive foam comprising an elastomeric, hot-melt, pressure-sensitive adhesive material having cells; said adhesive material comprising: (a) about 45 weight % of a styrene-isoprene-styrene block copolymer; (b) about 40 weight % of an aromatic modified hydrocarbon resin which associates with both the isoprene block and the styrene blocks of said copolymer, said resin being a single resin vehicle selected from the group consisting a of aromatic petroleum hydrocarbon resins and hydrogenated versions of aromatic petroleum hydrocarbon resins; (c) about 14 weight % of a processing oil; and (d) about 1 weight % of a stabilizer; said adhesive material having a viscosity of less than about 200,000 centipoise at 325° F. and a tensile strength of at least about 5 psi at 40% elongation at 25° C.
Claim 15
Dependent Claim
25 words
The foam of claim 12 wherein said copolymer has a styrene content of about 15% to about 50% of the total weight of the copolymer.
Claim 16
Dependent Claim
12 words
The foam of claim 13 wherein said copolymer is substantially fully coupled.
Claim 17
Dependent Claim
14 words
The foam of claim 14 wherein said adhesive material additionally comprises a nucleating agent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-29 | 1998-02-28 | 1998-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-29 | 2002-02-28 | 2002-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-29 | 2006-02-28 | 2006-08-30 | $7700.00 | Window Closed / Lapsed |