Patent US4554304A successfully refreshed from Google Patents.
US4554304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt butylene/ethylene adhesives
Assignee: Shell USA Inc
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Filing: 1984-05-31
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Granted: 1985-11-19
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Expires: 2004-05-31
Abstract
Abstract Hot melt adhesives with long open time good bonding to cold metals are made of blends of a maleic anhydride modified copolymer of butene-1 and ethylene, an aliphatic, substantially non-polar resin, a antioxidizing agent and, optionally, microcrystalline wax, a block copolymer and atactic polypropylene.
Inventors
- 👤 David R. Hansen
- 👤 William H. Korcz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:53
CPC Classifications
C; C09; C09J; C09J151/00; C09J151/06; C08; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10S; Y10S526/00; Y10S526/935
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
212 words
A hot melt adhesive with long open time comprising a blend of: from about 15% by weight to about 85% by weight of a maleic anhydride functionalized copolymer of butene-1 and ethylene, where the ethylene content is from about 5.5% by weight to about 10.0% by weight of said copolymer; and where said copolymer contains from about 0.05% by weight to about 5% by weight grafted maleic anhydride; from about 20% by weight to about 60% by weight of an aliphatic, substantially non-polar resin selected from the group consisting of C 5 stream resins, polyterpenes and partially hydrogenated C 9 hydrocarbon resins with softening points in a range of 70° C. to 125° C.; from about 0.1% by weight to about 0.5% by weight of a hindered phenolic antioxidant; from about 0% by weight to about 20% by weight of a microcrystalline wax; optionally, from about 0% by weight to about 35% by weight of a block copolymer which comprises at least one monalkenyl arene polymer end block and at least one substantially complete hydrogenated conjugated diene second block sufficient to give said blend flexibility and strength desired; and optionally, from about 0% by weight to about 40% by weight of atactic polypropylene sufficient to yield a good T-peel lower limit value.
Claim 2
Dependent Claim
212 words
A hot melt adhesive with long open time comprising a blend of: from about 15% by weight to about 85% by weight of a maleic anhydride functionalized copolymer of butene-1 and ethylene, where the ethylene content is from about 5.5% by weight to about 10.0% by weight of said copolymer; and where said copolymer contains from about 0.05% by weight to about 5% by weight grafted maleic anhydride; from about 20% by weight to about 60% by weight of an aliphatic, substantially non-polar resin selected from the group consisting of C 5 stream resins, polyterpenes and partially hydrogenated C 9 hydrocarbon resins with softening points in a range of 70° C. to 125° C.; from about 0.1% by weight to about 0.5% by weight of a hindered phenolic antioxidant; from about 0% by weight to about 20% by weight of a microcrystalline wax; optionally, from about 0% by weight to about 35% by weight of a block copolymer which comprises at least one monalkenyl arene polymer end block and at least one substantially complete hydrogenated conjugated diene second block sufficient to give said blend flexibility and strength desired; and optionally, from about 0% by weight to about 40% by weight of atactic polypropylene sufficient to yield a good T-peel lower limit value.
Claim 3
Dependent Claim
151 words
A hot melt adhesive with long open time, comprising a blend of: from about 35% by weight to about 55% by weight of a maleic anhydride functionalized copolymer of butene-1 and ethylene, where the ethylene content is about 5.5% by weight of said copolymer and where said copolymer contains about 0.1% by weight grafted maleic anhydride; from about 35% by weight to about 55% by weight of a hydrogenated C 9 based resin with a softening point of about 85° C.; from about 0.2% by weight to about 0.4% by weight tetrakis methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamate)methane; from about 0% by weight to about 25% by weight of a block copolymer which comprises at least one monoalkenyl arene polymer end block and at least one substantially complete hydrogenated conjugated diene second block sufficient to give said blend flexibility and strength desired; and from about 0% by weight to about 30% by weight of atactic polypropylene.
Claim 4
Dependent Claim
151 words
A hot melt adhesive with long open time, comprising a blend of: from about 35% by weight to about 55% by weight of a maleic anhydride functionalized copolymer of butene-1 and ethylene, where the ethylene content is about 5.5% by weight of said copolymer and where said copolymer contains about 0.1% by weight grafted maleic anhydride; from about 35% by weight to about 55% by weight of a hydrogenated C 9 based resin with a softening point of about 85° C.; from about 0.2% by weight to about 0.4% by weight tetrakis methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamate)methane; from about 0% by weight to about 25% by weight of a block copolymer which comprises at least one monoalkenyl arene polymer end block and at least one substantially complete hydrogenated conjugated diene second block sufficient to give said blend flexibility and strength desired; and from about 0% by weight to about 30% by weight of atactic polypropylene.
Claim 5
Dependent Claim
8 words
The polymer blend of claims 1, or 2.
Claim 6
Dependent Claim
198 words
A hot melt adhesive with long open time, made by the process comprising the steps of: grafting a copolymer of butene-1 and ethylene with from about 0.05% by weight to about 5% by weight of maleic anhydride; adding to said functionalized copolymer from about 20% by weight to about 60% by weight of an aliphatic, substantially non-polar resin selected from the group consisting of C 5 stream resins, polyterpene resins and partially hydrogenated C 9 hydrocarbon resins with softening points in a range of 70° C. to 125° C. and from about 0.1% by weight to about 0.5% by weight of a hindered phenolic antioxidant; adding from about 0% by weight to about 20% by weight of a microcrystalline wax, from about 0% by weight to about 35% by weight of a block copolymer which comprises at least one monoalkenyl arene polymer end block and at least one substantially complete hydrogenated conjugated diene second block, and from about 0% by weight to about 40% by weight of atactic polypropylene; and mixing said functionalized copolymer, said resin and any of said microcrystalline wax, said block copolymer, or said atactic polypropylene into an adhesive mixture to ensure a homogeneous mixture.
Claim 7
Dependent Claim
198 words
A hot melt adhesive with long open time, made by the process comprising the steps of: grafting a copolymer of butene-1 and ethylene with from about 0.05% by weight to about 5% by weight of maleic anhydride; adding to said functionalized copolymer from about 20% by weight to about 60% by weight of an aliphatic, substantially non-polar resin selected from the group consisting of C 5 stream resins, polyterpene resins and partially hydrogenated C 9 hydrocarbon resins with softening points in a range of 70° C. to 125° C. and from about 0.1% by weight to about 0.5% by weight of a hindered phenolic antioxidant; adding from about 0% by weight to about 20% by weight of a microcrystalline wax, from about 0% by weight to about 35% by weight of a block copolymer which comprises at least one monoalkenyl arene polymer end block and at least one substantially complete hydrogenated conjugated diene second block, and from about 0% by weight to about 40% by weight of atactic polypropylene; and mixing said functionalized copolymer, said resin and any of said microcrystalline wax, said block copolymer, or said atactic polypropylene into an adhesive mixture to ensure a homogeneous mixture.
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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) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |