US4602056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of grafted ethylene-vinylacetate copolymers for the production of hotmelt adhesives
Assignee: Bayer AG
•
Filing: 1985-05-10
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Granted: 1986-07-22
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Expires: 2005-05-10
Abstract
Abstract The invention relates to the use of grafted ethylene-vinylacetate copolymers (EVA-copolymers) for the production of hotmelt adhesives.
Inventors
- 👤 Helmut Waniczek
- 👤 Gerhard Hohmann
- 👤 Herbert Bartl
- 👤 Ludwig Mott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:34
CPC Classifications
C; C09; C09J; C09J151/00; C09J151/06; Y; Y10; Y10S; Y10S525/00; Y10S525/904
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
95 words
Hot melt adhesvie comprising a graft copolymer mixed with a tackifying resin wherein the graft copolymer is obtained by grafting 0.5 to 10% by weight of monomer units which consist of 80 to 100% by weight of methacrylic acid units onto 90 to 99.5% by weight of a graft base comprising a copolymer of 50 to 85% by weight of ethylene units and 15 to 50% by weight of vinyl acetate units and having been peroxygenated with atmospheric oxygen under pressure in the melt to a level of 50 to 3,000 ppm of active oxygen.
Claim 2
Dependent Claim
95 words
Hot melt adhesvie comprising a graft copolymer mixed with a tackifying resin wherein the graft copolymer is obtained by grafting 0.5 to 10% by weight of monomer units which consist of 80 to 100% by weight of methacrylic acid units onto 90 to 99.5% by weight of a graft base comprising a copolymer of 50 to 85% by weight of ethylene units and 15 to 50% by weight of vinyl acetate units and having been peroxygenated with atmospheric oxygen under pressure in the melt to a level of 50 to 3,000 ppm of active oxygen.
Claim 3
Dependent Claim
107 words
Hot melt adhesive comprising a graft copolymer mixed with a tackifying resin which is a modified or unmodified colophony resin or a hydrocarbon resin wherein the graft copolymer is obtained by grafting 0.5 to 10% by weight of monomer units which consist of 80 to 100% by weight of methacrylic acid units onto 90 to 99.5% by weight of a graft base comprising a copolymer of 50 to 85% by weight of ethylene units and 15 to 50% by weight of vinyl acetate units and having been peroxygenated with atmospheric oxygen under pressure in the melt to a level of 50 to 3,000 ppm of active oxygen.
Claim 4
Dependent Claim
107 words
Hot melt adhesive comprising a graft copolymer mixed with a tackifying resin which is a modified or unmodified colophony resin or a hydrocarbon resin wherein the graft copolymer is obtained by grafting 0.5 to 10% by weight of monomer units which consist of 80 to 100% by weight of methacrylic acid units onto 90 to 99.5% by weight of a graft base comprising a copolymer of 50 to 85% by weight of ethylene units and 15 to 50% by weight of vinyl acetate units and having been peroxygenated with atmospheric oxygen under pressure in the melt to a level of 50 to 3,000 ppm of active oxygen.
Claim 5
Dependent Claim
16 words
Hot melt adhesive according to claim 1 wherein the tackifying resin is a modified colophony resin.
Claim 6
Dependent Claim
18 words
Hot melt adhesive according to claim 1 wherein the tackifying resin is the glycerol ester of hydrogenated rosin.
References Cited (Backward Citations)
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US3211808A
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GB1140116A
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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) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |