US5057571A
Expired / Lapsed
US
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Disposable article construction adhesive
Assignee: HB Fuller Licensing and Financing Inc
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Filing: 1990-10-09
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Granted: 1991-10-15
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Expires: 2010-10-09
Abstract
Abstract The composite articles of this invention can be made more efficiently through the use of a single adhesive having sufficient resistance to creep, sufficiently high bond strength, and a viscosity that is controllable through a range permitting it to be used for elastic attachment and in fine line, multi-line extrusion or sprayed adhesive preparation techniques.
Inventors
- 👤 David B. Malcolm
- 👤 William L. Bunnelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:43
CPC Classifications
C; C09; C09J; C09J153/00; C09J153/02; A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/58; A61L15/585
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
166 words
A hot melt adhesive composition for the construction of disposable articles which comprises: (a) 5 to 14 wt % of a radial block copolymer having a molecular weight of at least 145,000 having the formula: (A--B).sub.n --Y wherein Y is a multivalent coupling agent, A comprises a polyvinyl substituted aromatic block, B comprises a polymeric rubbery midblock, and n comprises an integer of at least 3; (b) about 45 to 85 wt % of a compatible tackifying agent selected from the group consisting of a C 5 resin, a styrenated C 5 resin, a styrenated terpene resin, a hydrogenated C 9 resin, a rosin derivative, a styrenated terpene resin and mixtures thereof; and (c) about 5 to 35 wt % of a plasticizing oil; wherein the hot melt pressure sensitive adhesive has a static shear at 100° F. of at least 30 min., a creep resistance at 100° F. of less than about 30% and exhibits a viscosity of less than 25,000 cP at 275° F.
Claim 2
Dependent Claim
166 words
A hot melt adhesive composition for the construction of disposable articles which comprises: (a) 5 to 14 wt % of a radial block copolymer having a molecular weight of at least 145,000 having the formula: (A--B).sub.n --Y wherein Y is a multivalent coupling agent, A comprises a polyvinyl substituted aromatic block, B comprises a polymeric rubbery midblock, and n comprises an integer of at least 3; (b) about 45 to 85 wt % of a compatible tackifying agent selected from the group consisting of a C 5 resin, a styrenated C 5 resin, a styrenated terpene resin, a hydrogenated C 9 resin, a rosin derivative, a styrenated terpene resin and mixtures thereof; and (c) about 5 to 35 wt % of a plasticizing oil; wherein the hot melt pressure sensitive adhesive has a static shear at 100° F. of at least 30 min., a creep resistance at 100° F. of less than about 30% and exhibits a viscosity of less than 25,000 cP at 275° F.
Claim 3
Dependent Claim
26 words
The adhesive of claim 1 wherein A comprises a polystyrene block and B comprises a hydrogenated or non-hydrogenated polymeric block comprising butadiene, isoprene or mixtures thereof.
Claim 4
Dependent Claim
11 words
The adhesive of claim 2 wherein B comprises a polybutadiene block.
Claim 5
Dependent Claim
11 words
The adhesive of claim 2 wherein B comprises a polyisoprene block.
Claim 6
Dependent Claim
18 words
The adhesive of claim 1 wherein the plasticizing oil comprises a naphthenic, a paraffinic oil or mixtures thereof.
Claim 7
Dependent Claim
16 words
The adhesive of claim 1 wherein the viscosity comprises 5,000 to 10,000 cP at 275° F.
Claim 8
Dependent Claim
17 words
The composition of claim 1 wherein the creep resistance at 100° F. comprises about 5 to 25%.
Claim 9
Dependent Claim
15 words
The adhesive of claim 1 wherein the dynamic peel adhesion test results in substrate failure.
Claim 10
Dependent Claim
40 words
The adhesive of calm 2 wherein the adhesive additionally comprises 0.1 to 10 wt % of a linear A-B-A block copolymer wherein A comprises a polystyrene block and B comprises a polymeric rubbery midblock comprising butadiene, isoprene, or mixtures thereof.
Claim 11
Dependent Claim
40 words
The adhesive of calm 2 wherein the adhesive additionally comprises 0.1 to 10 wt % of a linear A-B-A block copolymer wherein A comprises a polystyrene block and B comprises a polymeric rubbery midblock comprising butadiene, isoprene, or mixtures thereof.
Claim 12
Dependent Claim
196 words
A hot melt pressure sensitive adhesive composition for the multi-line construction of disposable articles which consists essentially of: (a) about 5 to 14 wt % of a radial block copolymer having a molecular weight of about 185,000 to 240,000 having the formula: (A--B).sub.n --Y wherein Y is a multivalent coupling agent, A comprises a polystyrene block, B comprises a polymeric butadiene midblock, and n comprises an integer of about 3 to 5; (b) about 0.1 to 10 wt % of a linear A-B-A block copolymer wherein A is polystyrene blend and B comprises polybutadiene block or polyisoprene block; (c) about 40 to 80 wt % of a compatible tackifying agent selected from the group consisting of a C5 resin, a styrenated C5 resin, a styrenated terpene resin, a hydrogenated C 9 resin, a rosin derivative, a styrenated terpene resin and mixtures thereof; and (d) about 5 to 35 wt % of a plasticizing oil; wherein the hot melt pressure sensitive adhesive has a static shear of at least about 30 min. at 100° F., a creep resistance of at least about 30% at 100° and exhibits a viscosity of less than 15,000 cP at 275° F.
Claim 13
Dependent Claim
196 words
A hot melt pressure sensitive adhesive composition for the multi-line construction of disposable articles which consists essentially of: (a) about 5 to 14 wt % of a radial block copolymer having a molecular weight of about 185,000 to 240,000 having the formula: (A--B).sub.n --Y wherein Y is a multivalent coupling agent, A comprises a polystyrene block, B comprises a polymeric butadiene midblock, and n comprises an integer of about 3 to 5; (b) about 0.1 to 10 wt % of a linear A-B-A block copolymer wherein A is polystyrene blend and B comprises polybutadiene block or polyisoprene block; (c) about 40 to 80 wt % of a compatible tackifying agent selected from the group consisting of a C5 resin, a styrenated C5 resin, a styrenated terpene resin, a hydrogenated C 9 resin, a rosin derivative, a styrenated terpene resin and mixtures thereof; and (d) about 5 to 35 wt % of a plasticizing oil; wherein the hot melt pressure sensitive adhesive has a static shear of at least about 30 min. at 100° F., a creep resistance of at least about 30% at 100° and exhibits a viscosity of less than 15,000 cP at 275° F.
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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) | 1994-10-14 | 1995-04-15 | 1995-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-14 | 1999-04-15 | 1999-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-14 | 2003-04-15 | 2003-10-15 | $7700.00 | Window Closed / Lapsed |