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US4816306A
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US
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Hot melt adhesives based on ethylene-n-butyl acrylate
Assignee: Ingredion Inc
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Filing: 1987-06-19
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Granted: 1989-03-28
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Expires: 2007-06-19
Abstract
Abstract Hot melt packaging adhesive compositions consisting essentially of 35 to 45% by weight of an ethylene n-butyl acrylate copolymer containing 25-45% by weight, preferably 30 to 40% n-butyl acrylate and having a melt index of at least 50; 35 to 55% of a terpene phenolic tackifier; and 10 to 20% by weight of a high melting synthetic wax provide adhesives characterized by an excellent balance of high and low temperature performance without sacrifice to machinability or thermal stability.
Inventors
- 👤 Francis X. Brady
- 👤 Thomas F. Kauffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:39
CPC Classifications
C; C09; C09J; C09J165/00; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/14; C08L2666/22; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1397; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2822
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
A carton, case or tray used for packaging products at temperatures greater than about 40° C., which products will be stored at temperatures less than about -18° C., said carton, case or tray formed utilizing a hot melt adhesive composition consisting essentially of: (a) 35 to 45% by weight of at least one ethylene n-butyl acrylate copolymer containing 25-45% by weight n-butyl acrylate and having a melt index of at least 50; (b) 35 to 55% of a terpene phenolic tackifier having a Ring and Ball softening point of at least about 110° C.; and (c) 10 to 20% by weight of a high melting synthetic wax.
Claim 2
Dependent Claim
107 words
A carton, case or tray used for packaging products at temperatures greater than about 40° C., which products will be stored at temperatures less than about -18° C., said carton, case or tray formed utilizing a hot melt adhesive composition consisting essentially of: (a) 35 to 45% by weight of at least one ethylene n-butyl acrylate copolymer containing 25-45% by weight n-butyl acrylate and having a melt index of at least 50; (b) 35 to 55% of a terpene phenolic tackifier having a Ring and Ball softening point of at least about 110° C.; and (c) 10 to 20% by weight of a high melting synthetic wax.
Claim 3
Dependent Claim
21 words
The carton, case or tray of claim 1 wherein the ethylene/n-butyl acrylate copolymer in the adhesive contains about 30% n-butyl acrylate.
Claim 4
Dependent Claim
24 words
The carton, case or tray of claim 1 wherein the ethylene/n-butyl acrylate copolymer in the adhesive has a melt index between 100 and 400.
Claim 5
Dependent Claim
28 words
The carton, case or tray of claim 1 wherein the tackifying resin in the adhesive has a Ring and Ball softening point of at least about 125° C.
Claim 6
Dependent Claim
33 words
The carton, case or tray of claim 1 wherein the tackifying resin in the adhesive is a phenolic modified terpene resin having a Ring and Ball softening point of at least 125° C.
Claim 7
Dependent Claim
32 words
The carton, case or tray of claim 1 wherein the wax in the adhesive is selected from the group consisting of synthetic, high density, low molecular weight polyethylene waxes and Fischer-Tropsch waxes.
Claim 8
Dependent Claim
24 words
The carton, case or tray of claim 6 wherein the wax in the adhesive is a synthetic, high density, low molecular weight polyethylene wax.
Claim 9
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 45 and an ethylene/n-butyl acrylate copolymer having a melt index of 400.
Claim 10
Dependent Claim
65 words
The carton, case or tray of claim 1 wherein the adhesive consists essentially of a blend of an ethylene/n-butyl acrylate copolymer having a melt index of 45 and an ethylene/n-butyl acrylate copolymer having a melt index of 400; a phenolic modified terpene resin having a Ring and Ball softening point of at least 125° C. and a synthetic, high density, low molecular weight polyethylene wax.
Claim 11
Dependent Claim
23 words
The carton, case or tray of claim 1 wherein there is additionally present in the hot melt adhesive composition 0.1 to 1.5% stabilizer.
References Cited (Backward Citations)
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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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |