Patent US4472555A successfully refreshed from Google Patents.
US4472555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive blends containing ethylene polymer grafted with carboxylic reactant
Assignee: Enron Chemical Co
•
Filing: 1983-05-12
•
Granted: 1984-09-18
•
Expires: 2003-05-12
Abstract
Abstract Adhesive blends comprising blends of a non-elastomeric graft copolymer of a non-polar ethylene homopolymer or copolymer backbone grafted with at least one grafting monomer comprising one or more of polymerizable ethylenically unsaturated carboxylic acids or the anhydrides of such acids blended with an elastomer-free blending resin that is a mixture of one or more linear low density polyethylenes and one or more polypropylenes. These blends provide excellent adhesion to both polypropylene and polar substrates.
Inventors
- 👤 Seymour Schmukler
- 👤 John Machonis, Jr.
- 👤 Mitsuzo Shida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:41
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J123/0807; C09J123/0815; C09J123/10; C09J123/12; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/24; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
141 words
An elastomer-free adhesive blend especially useful for adhering propylene polymers to polar substrates, consisting essentially of: (A) about 0.1-40 parts by weight in said blend of a non-elastomeric graft copolymer of about 70-99.999 wt.% of a non-polar ethylene homopolymer or copolymer backbone having a density of at least about 0.915 grafted with about 30-0.001 wt.% of at least one grafting monomer comprising at least one polymerizable ethylenically unsaturated carboxylic acid or carboxylic acid anhydride for a total of 100% and (B) about 99.9-60 parts by weight of a substantially elastomer-free blending resin mixture of about 25-75 wt.% of a linear low density polyethylene of a density of about 0.915 to less than 0.94 having a substantial absence of long-chain branching and a high degree of short-chain branching, and about 75-25 wt.% of a non-elastomeric propylene polymer for a total of 100%.
Claim 2
Dependent Claim
141 words
An elastomer-free adhesive blend especially useful for adhering propylene polymers to polar substrates, consisting essentially of: (A) about 0.1-40 parts by weight in said blend of a non-elastomeric graft copolymer of about 70-99.999 wt.% of a non-polar ethylene homopolymer or copolymer backbone having a density of at least about 0.915 grafted with about 30-0.001 wt.% of at least one grafting monomer comprising at least one polymerizable ethylenically unsaturated carboxylic acid or carboxylic acid anhydride for a total of 100% and (B) about 99.9-60 parts by weight of a substantially elastomer-free blending resin mixture of about 25-75 wt.% of a linear low density polyethylene of a density of about 0.915 to less than 0.94 having a substantial absence of long-chain branching and a high degree of short-chain branching, and about 75-25 wt.% of a non-elastomeric propylene polymer for a total of 100%.
Claim 3
Dependent Claim
27 words
The blend of claim 1 wherein said propylene polymer of the blending resin comprises propylene homopolymers and copolymers of propylene and one or more unsaturated aliphatic hydrocarbons.
Claim 4
Dependent Claim
16 words
The blend of claim 2 wherein said propylene polymer comprises a copolymer of propylene and ethylene.
Claim 5
Dependent Claim
23 words
The blend of claim 1 wherein said polyethylene of said blending resin comprises linear low density polyethylene having a narrow molecular weight distribution.
Claim 6
Dependent Claim
20 words
The blend of claim 1 wherein said polyethylene of the blending resin comprises copolymers of ethylene and an unsaturated hydrocarbon.
Claim 7
Dependent Claim
14 words
The blend of claim 5 wherein said hydrocarbon comprises propylene, butene-1, hexene-1 or octene-1.
Claim 8
Dependent Claim
64 words
The blend of claim 1 wherein said grafting monomer comprises at least one of acrylic acid, methacrylic acid, maleic acid, itaconic acid, citraconic acid, mesaconic acid, maleic anhydride, 4-methyl cyclohex-4-ene-1,2-dicarboxylic acid anhydride, bicyclo(2.2.2)oct-5-ene-2,3-dicarboxylic acid anhydride, 1,2,3,4,5,8,9,10-octahydronaphthalene-2,3-dicarboxylic acid anhydride, 2-oxa-1,3-diketospiro(4.4)non-7-ene, bicyclo(2.2.1)hept-5-ene-2,3-dicarboxylic acid anhydride, maleopimaric acid, tetrahydrophthalic anhydride, norborn-5-ene-2,3-dicarboxylic acid anhydride, Nadic anhydride, methyl Nadic anhydride, Himic anhydride, methyl Himic anhydride, and x-methyl bicyclo(2.2.1)hept-5-ene-2,3dicarboxylic acid anhydride.
References Cited (Backward Citations)
US3658948A
Cited
US3746676A
Cited
US3868433A
Cited
US3882194A
Cited
US4087587A
Cited
US4087588A
Cited
DE2658547A1
Cited
JPS5513718A
Cited
GB2081723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |