Patent US5670566A successfully refreshed from Google Patents.
US5670566A
Expired / Lapsed
US
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Cool-applied hot melt adhesive composition
Assignee: Henkel Corp
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Filing: 1995-01-06
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Granted: 1997-09-23
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Expires: 2015-01-06
Abstract
Abstract A carton, case or tray formed utilizing a hot melt adhesive composition said adhesive consisting essentially of a) 10 to 60% by weight of at least one ethylene n-butyl acrylate copolymer containing 25 to 45% by weight n-butyl acrylate and having a melt index of at least about 850; b) 20 to 60% of a rosin ester tackifying resin; c) 10 to 50% by weight of a microcrystalline or paraffin wax having a melting point of 150° to 200° F.; d) 1 to 20% by weight of a polymeric additive selected from the group consisting of ethylene vinyl acetate containing 10 to 40% by weight vinyl acetate, ethylene methyl acrylate polymers containing 10 to 28% methyl acrylate, ethylene acrylic acid copolymers having an acid number of 25 to 150, polyethylene, polypropylene, poly-(butene-1-co-ethylene), and lower melt index ethylene n-butyl acrylate copolymers; and e) 0 to 1.5% stabilizer, said adhesive characterized by a viscosity of less than 3000 cps at 135° C., fiber tearing bonds from within the range of -35° to 40° C.
Inventors
- 👤 Ingrid Liedermooy
- 👤 Daniel C. Stauffer
- 👤 Paul P. Puletti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:37
CPC Classifications
C; C09; C09J; C09J193/00; C09J193/04; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/06; C08L2666/26
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
210 words
A carton, case or tray formed utilizing a hot melt adhesive composition said adhesive consisting essentially of: a) 10 to 60% by weight of at least one ethylene n-butyl acrylate copolymer containing 25 to 45% by weight n-butyl acrylate and having a melt index of at least about 850; b) 20 to 60% of a rosin ester tackifying resin selected from the group consisting of gum resin, wood rosin, tall-oil rosin, distilled rosin, hydrogenated rosin, dimerized rosin, polymerized rosin, the glycerol ester of pale wood rosin, the glycerol ester of hydrogenated rosin, the glycerol ester of polymerized rosin, the pentaerythritol ester of hydrogenated rosin and the phenolic-modified pentaerythritol ester of rosin; c) 10 to 50% by weight of a microcrystalline or paraffin wax having a melting point of 150° to 200° F.; and d) 0 to 20% by weight of a polymeric additive selected from the group consisting of ethylene vinyl acetate containing 10 to 40% by weight vinyl acetate, ethylene methyl acrylate polymers containing 10 to 28% methyl acrylate, ethylene acrylic acid copolymers having an acid number of 25 to 150, polyethylene, polypropylene, poly-(butene-1-co-ethylene), and lower melt index ethylene n-butyl acrylate copolymers; e) 0 to 1.5% stabilizer; said adhesive having a viscosity at 250° F. less than 2000 cps.
Claim 2
Dependent Claim
210 words
A carton, case or tray formed utilizing a hot melt adhesive composition said adhesive consisting essentially of: a) 10 to 60% by weight of at least one ethylene n-butyl acrylate copolymer containing 25 to 45% by weight n-butyl acrylate and having a melt index of at least about 850; b) 20 to 60% of a rosin ester tackifying resin selected from the group consisting of gum resin, wood rosin, tall-oil rosin, distilled rosin, hydrogenated rosin, dimerized rosin, polymerized rosin, the glycerol ester of pale wood rosin, the glycerol ester of hydrogenated rosin, the glycerol ester of polymerized rosin, the pentaerythritol ester of hydrogenated rosin and the phenolic-modified pentaerythritol ester of rosin; c) 10 to 50% by weight of a microcrystalline or paraffin wax having a melting point of 150° to 200° F.; and d) 0 to 20% by weight of a polymeric additive selected from the group consisting of ethylene vinyl acetate containing 10 to 40% by weight vinyl acetate, ethylene methyl acrylate polymers containing 10 to 28% methyl acrylate, ethylene acrylic acid copolymers having an acid number of 25 to 150, polyethylene, polypropylene, poly-(butene-1-co-ethylene), and lower melt index ethylene n-butyl acrylate copolymers; e) 0 to 1.5% stabilizer; said adhesive having a viscosity at 250° F. less than 2000 cps.
Claim 3
Dependent Claim
22 words
The carton, case or tray of claim 1 wherein the ethylene/n-butyl acrylate copolymer in the adhesive contains 20 to 40% n-butyl acrylate.
Claim 4
Dependent Claim
25 words
The carton, case or tray of claim 1 wherein the ethylene/n-butyl acrylate copolymer in the adhesive has a melt index of at least about 900.
Claim 5
Dependent Claim
24 words
The carton, case or tray of claim 1 wherein the tackifying resin in the adhesive has a melting point of 10° to 120° C.
Claim 6
Dependent Claim
36 words
The carton, case or tray of claim 1 wherein the adhesive contains a blend of an ethylene/n-butyl acrylate copolymer having a melt index of 900 and an ethylene/n-butyl acrylate copolymer having a melt index of 300.
Claim 7
Dependent Claim
74 words
The carton, case, or tray of claim 1 where there is up to 15% by weight of a polymeric additive selected from the group consisting of ethylene vinyl acetate polymers containing 10 to 40% by weight vinyl acetate; ethylene methyl acrylate polymers containing 10 to 28% by weight methyl acrylate, ethylene acrylic acid copolymers having an acid number of 25 to 150, polyethylene, polypropylene, poly(butene-1-co-ethylene) polymers and lower melt index ethylene n-butyl acrylate copolymers.
Claim 8
Dependent Claim
211 words
A carton, case or tray formed utilizing a hot melt adhesive composition said adhesive consisting essentially of: a) 10 to 60% by weight of at least one ethylene n-butyl acrylate copolymer containing 25 to 45% by weight n-butyl acrylate and having a melt index of at least about 850; b) 20 to 60% of a rosin ester tackifying resin selected from the group consisting of gum rosin, wood rosin, tall-oil rosin, distilled rosin, hydrogenated rosin, dimerized rosin, polymerized rosin, the glycerol ester of pale wood rosin, the glycerol ester of hydrogenated rosin, the glycerol ester of polymerized rosin, the pentaerythritol ester of hydrogenated rosin and the phenolic-modified pentaerythritol ester of rosin; c) 10 to 50% by weight of a microcrystalline or paraffin wax having a melting point of 150° to 200° F.; and d) 0 to 20% by weight of a polymeric additive selected from the group consisting of ethylene vinyl acetate containing 10 to 40% by weight vinyl acetate, ethylene methyl acrylate polymers containing 10 to 28% methyl acrylate, ethylene acrylic acid copolymers having an acid number of 25 to 150, polyethylene, polypropylene, poly-(butene-1-co-ethylene), and lower melt index ethylene n-butyl acrylate copolymers; e) 0 to 1.5% stabilizer; said adhesive characterized by a viscosity at 250° F. less than 2000 cps.
Claim 9
Dependent Claim
211 words
A carton, case or tray formed utilizing a hot melt adhesive composition said adhesive consisting essentially of: a) 10 to 60% by weight of at least one ethylene n-butyl acrylate copolymer containing 25 to 45% by weight n-butyl acrylate and having a melt index of at least about 850; b) 20 to 60% of a rosin ester tackifying resin selected from the group consisting of gum rosin, wood rosin, tall-oil rosin, distilled rosin, hydrogenated rosin, dimerized rosin, polymerized rosin, the glycerol ester of pale wood rosin, the glycerol ester of hydrogenated rosin, the glycerol ester of polymerized rosin, the pentaerythritol ester of hydrogenated rosin and the phenolic-modified pentaerythritol ester of rosin; c) 10 to 50% by weight of a microcrystalline or paraffin wax having a melting point of 150° to 200° F.; and d) 0 to 20% by weight of a polymeric additive selected from the group consisting of ethylene vinyl acetate containing 10 to 40% by weight vinyl acetate, ethylene methyl acrylate polymers containing 10 to 28% methyl acrylate, ethylene acrylic acid copolymers having an acid number of 25 to 150, polyethylene, polypropylene, poly-(butene-1-co-ethylene), and lower melt index ethylene n-butyl acrylate copolymers; e) 0 to 1.5% stabilizer; said adhesive characterized by a viscosity at 250° F. less than 2000 cps.
Claim 10
Dependent Claim
19 words
The adhesive of claim 7 wherein the ethylene/n-butyl acrylate copolymer in the adhesive contains 20 to 40% n-butyl acrylate.
Claim 11
Dependent Claim
19 words
The adhesive of claim 7 wherein the ethylene/n-butyl acrylate copolymer has a melt index of at least about 900.
Claim 12
Dependent Claim
18 words
The adhesive of claim 7 wherein the tackifying resin has a melting point of 10° to 120° C.
Claim 13
Dependent Claim
30 words
The adhesive of claim 7 containing a blend of an ethylene/n-butyl acrylate copolymer having a melt index of 900 and an ethylene/n-butyl acrylate copolymer having a melt index of 300.
Claim 14
Dependent Claim
69 words
The adhesive of claim 7 containing up to 15% by weight of a polymeric additive selected from the group consisting of ethylene vinyl acetate polymers containing 10 to 40% by weight vinyl acetate; ethylene methyl acrylate polymers containing 10 to 28% by weight methyl acrylate, ethylene acrylic acid copolymers having an acid number of 25 to 150, polyethylene, polypropylene, poly(butene-1-co-ethylene) polymers and lower melt index ethylene n-butyl acrylate copolymers.
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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) | 2000-09-22 | 2001-03-24 | 2001-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-22 | 2005-03-24 | 2005-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-22 | 2009-03-24 | 2009-09-23 | $7700.00 | Window Closed / Lapsed |