US4332655A
Expired / Lapsed
US
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Adhesive compositions comprising ethylene/polar monomer copolymer and an elastomer
Assignee: Raychem Corp
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Filing: 1980-05-22
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Granted: 1982-06-01
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Expires: 2000-05-22
Abstract
Abstract Compositions comprising a mixture of an adhesive copolymer of ethylene and a monoolefinically unsaturated polar comonomer, for example, vinyl acetate, in combination with an olefin rubber, preferably a rubbery copolymer of ethylene and propylene, exhibit excellent adhesive properties, particularly when applied to non-porous surfaces such as metals. Creep resistance can be improved by lightly crosslinking the composition with radiation. Typically thermoplastic in nature, these compositions can be made thermosetting by including in the composition a heat activated crosslinking system. The compositions also exhibit resistance to blocking and flexibility at low temperatures.
Inventors
- 👤 Anthony J. Berejka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:10
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
95 words
An adhesive composition comprising (a) a normally adhesive copolymer of ethylene and at least one monoolefinically unsaturated polar comonomer, said copolymer containing at least about 50% by weight of combined ethylene, and (b) an ethylene-propylene elastomer which (i) has a substantially or fully saturated backbone; (ii) has a Mooney viscosity at 250° F. of less than about 70; (iii) contains less than about 55% by weight of combined ethylene; and (iv) is present in amount 15 to 50 parts by weight per 100 parts by weight of the elastomer and the normally adhesive copolymer together.
Claim 2
Dependent Claim
95 words
An adhesive composition comprising (a) a normally adhesive copolymer of ethylene and at least one monoolefinically unsaturated polar comonomer, said copolymer containing at least about 50% by weight of combined ethylene, and (b) an ethylene-propylene elastomer which (i) has a substantially or fully saturated backbone; (ii) has a Mooney viscosity at 250° F. of less than about 70; (iii) contains less than about 55% by weight of combined ethylene; and (iv) is present in amount 15 to 50 parts by weight per 100 parts by weight of the elastomer and the normally adhesive copolymer together.
Claim 3
Dependent Claim
19 words
An adhesive composition according to claim 1 wherein said polar comonomer is selected from monoolefinically unsaturated esters and acids.
Claim 4
Dependent Claim
22 words
An adhesive composition according to claim 1 wherein the polar comonomer is a mixture of an unsaturated ester and an unsaturated acid.
Claim 5
Dependent Claim
30 words
An adhesive composition according to claim 1 wherein the normally adhesive polymer is a copolymer of ethylene, vinyl acetate, and a third comonomer selected from methacrylic acid and acrylic acid.
Claim 6
Dependent Claim
30 words
An adhesive composition according to claim 1 wherein the normally adhesive polymer has a melt index at 190° C. and 2160 gms which is from about 2 to about 1000.
Claim 7
Dependent Claim
19 words
An adhesive composition according to claim 5 wherein the melt index range is from about 4 to about 500.
Claim 8
Dependent Claim
33 words
An adhesive composition according to claim 1 wherein the elastomer is a copolymer of about 45 to 55% by weight of ethylene, 0-10% by weight of a non-conjugated diene and the balance propylene.
Claim 9
Dependent Claim
15 words
An adhesive composition according to claim 7 wherein the diene is 1,4-hexadiene or ethylidene norbornene.
Claim 10
Dependent Claim
38 words
An adhesive composition according to claim 1 comprising 20-35 parts by weight of the elastomer and 65-80 parts by weight of the normally adhesive polymer per 100 parts by weight of the adhesive polymer and the elastomer together.
Claim 11
Dependent Claim
13 words
An adhesive composition according to claim 1 that has been crosslinked by radiation.
Claim 12
Dependent Claim
19 words
An adhesive composition according to claim 1 that further comprises an effective amount of a heat activated crosslinking system.
Claim 13
Dependent Claim
18 words
An adhesive composition according to claim 1 wherein the elastomer has Mooney viscosity of about 45 or less.
Claim 14
Dependent Claim
19 words
An adhesive composition according to claim 1 wherein the elastomer has Mooney viscosity of about 20 to about 25.
Claim 15
Dependent Claim
21 words
An adhesive composition according to claim 1 in which the adhesive copolymer and the elastomer are substantially the only polymeric components.
Claim 16
Dependent Claim
21 words
An adhesive composition according to claim 14 which has been cross-linked by irradiation to a dosage of 2.5 to 10 megarads.
Claim 17
Dependent Claim
13 words
An adhesive composition according to claim 1 which has been cross-linked by heating.
Claim 18
Dependent Claim
144 words
An adhesive composition comprising (a) a normally adhesive copolymer which (i) contains 50 to 85% by weight of units derived from ethylene, with the balance of the copolymer being units derived from at least one monoolefinically unsaturated polar comonomer, and (ii) has a melt index at 190° C. and 2160 gms of 4 to 500; and (b) an ethylene-propylene elastomer which (i) has a substantially or fully saturated backbone; (ii) has a Mooney viscosity at 250° F. of about 45 or less; (iii) contains 40 to 55% by weight of units derived from ethylene and 2 to 10% by weight of units derived from a non-conjugated diene, with the balance of the elastomer being units derived from propylene; and (iv) is present in amount 15 to 50 parts by weight per 100 parts by weight of the copolymer (a) and the elastomer (b) together.
Claim 19
Dependent Claim
144 words
An adhesive composition comprising (a) a normally adhesive copolymer which (i) contains 50 to 85% by weight of units derived from ethylene, with the balance of the copolymer being units derived from at least one monoolefinically unsaturated polar comonomer, and (ii) has a melt index at 190° C. and 2160 gms of 4 to 500; and (b) an ethylene-propylene elastomer which (i) has a substantially or fully saturated backbone; (ii) has a Mooney viscosity at 250° F. of about 45 or less; (iii) contains 40 to 55% by weight of units derived from ethylene and 2 to 10% by weight of units derived from a non-conjugated diene, with the balance of the elastomer being units derived from propylene; and (iv) is present in amount 15 to 50 parts by weight per 100 parts by weight of the copolymer (a) and the elastomer (b) together.
Claim 20
Dependent Claim
20 words
An adhesive composition according to claim 17 wherein the elastomer has a Mooney viscosity of about 20 to about 25.
Claim 21
Dependent Claim
34 words
An adhesive composition according to claim 17 wherein the elastomer is present in amount 20 to 35 parts by weight per 100 parts by weight of the copolymer (a) and the elastomer (b) together.
Claim 22
Dependent Claim
20 words
An adhesive composition according to claim 19 wherein the normally adhesive copolymer is a copolymer of ethylene and vinyl acetate.
Claim 23
Dependent Claim
30 words
An adhesive composition according to claim 20 wherein the normally adhesive copolymer is a copolymer of ethylene, vinyl acetate and a third comonomer selected from methacrylic acid and acrylic acid.
Claim 24
Dependent Claim
19 words
An adhesive composition according to claim 17 wherein the normally adhesive copolymer (a) has a melt index below 50.
Claim 25
Dependent Claim
19 words
An adhesive composition according to claim 17 wherein the normally adhesive copolymer (a) has a melt index above 50.
Claim 26
Dependent Claim
28 words
An adhesive composition according to claim 17 wherein the normally adhesive copolymer (a) has a melt index of at least 150 and which contains a heat-activatable cross-linking system.
Claim 27
Dependent Claim
94 words
An adhesive composition wherein the polymeric constituents consist essentially of (a) a normally adhesive copolymer of ethylene and at least one monoolefinically unsaturated polar comonomer, said copolymer containing at least about 50% by weight of combined ethylene; (b) a polyolefin elastomer which (i) has a substantially or fully saturated backbone, (ii) has a Mooney viscosity at 250° F. of less than about 70, and (iii) is present in amount 15 to 50 parts by weight per 100 parts by weight of the elastomer and the normally adhesive copolymer together; and optionally (c) a tackifier.
Claim 28
Dependent Claim
94 words
An adhesive composition wherein the polymeric constituents consist essentially of (a) a normally adhesive copolymer of ethylene and at least one monoolefinically unsaturated polar comonomer, said copolymer containing at least about 50% by weight of combined ethylene; (b) a polyolefin elastomer which (i) has a substantially or fully saturated backbone, (ii) has a Mooney viscosity at 250° F. of less than about 70, and (iii) is present in amount 15 to 50 parts by weight per 100 parts by weight of the elastomer and the normally adhesive copolymer together; and optionally (c) a tackifier.
Claim 29
Dependent Claim
19 words
An adhesive composition according to claim 25 wherein the elastomer has a Mooney viscosity of about 45 or less.
Claim 30
Dependent Claim
20 words
An adhesive composition according to claim 26 wherein the elastomer has a Mooney viscosity of about 20 to about 25.
References Cited (Backward Citations)
US3433573A
Cited
US3410928A
Cited
US3328194A
Cited
US3770572A
Cited
US3226454A
Cited
US3454676A
Cited
US3616363A
Cited
US3663662A
Cited
US3833689A
Cited
US3950281A
Cited
US3847721A
Cited
US3886234A
Cited
US3904470A
Cited
US3941859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |