US5310803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-melt composition that have good open time and form creep-resistant bonds when applied in thin layers
Assignee: 3M Co
•
Filing: 1991-12-17
•
Granted: 1994-05-10
•
Expires: 2011-12-17
Abstract
Abstract A hot-melt composition comprising an ethylene/vinyl acetate copolymer, an ethylene/n-butyl acrylate copolymer, and a tackifying resin can be spread into a thin layer that has a limited open time of at least 5 seconds. The composition eventually crystallizes to form a creep-resistant bond.
Inventors
- 👤 Dennis D. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:35
CPC Classifications
C; C09; C09J; C09J9/00; C09J9/005; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C08; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1452; Y10T428/1462; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/2891; Y10T428/29; Y10T428/2913
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
58 words
A hot-melt composition comprising an ethylene/vinyl acetate copolymer having a melt index of at least 500 and comprising a total of 23% to 35% vinyl acetate, an ethylene/n-butyl acrylate copolymer, and a tackifying resin, wherein said composition has a limited open time of at least 5 seconds when deposited in a thin layer on a room temperature substrate.
Claim 2
Dependent Claim
58 words
A hot-melt composition comprising an ethylene/vinyl acetate copolymer having a melt index of at least 500 and comprising a total of 23% to 35% vinyl acetate, an ethylene/n-butyl acrylate copolymer, and a tackifying resin, wherein said composition has a limited open time of at least 5 seconds when deposited in a thin layer on a room temperature substrate.
Claim 3
Dependent Claim
21 words
A hot-melt composition according to claim 1 wherein said ethylene/n-butyl acrylate copolymer has a melt index of at least about 400.
Claim 4
Dependent Claim
20 words
A hot-melt composition according to claim 2 wherein said ethylene/n-butyl acrylate copolymer comprises from about 25% to 40% n-butyl acrylate.
Claim 5
Dependent Claim
21 words
A hot-melt composition according to claim 1 wherein said ethylene/vinyl acetate copolymer has a melt index of from 500 to 2500.
Claim 6
Dependent Claim
19 words
A hot-melt composition according to claim 1 wherein said ethylene/vinyl acetate copolymer comprises from 23% to 30% vinyl acetate.
Claim 7
Dependent Claim
27 words
A hot-melt composition according to claim 1 wherein said tackifying resin has a nominal ring and ball softening point of from about 80° C. to 125° C.
Claim 8
Dependent Claim
26 words
A hot-melt composition according to claim 6 wherein said tackifying resin has a combined aromatic and olefinic content of from about 0.5 to 50 mole %.
Claim 9
Dependent Claim
26 words
A hot-melt composition according to claim 7 wherein said tackifying resin has a combined aromatic and olefinic content of from about 2 to 30 mole %.
Claim 10
Dependent Claim
32 words
A hot-melt composition according to claim 1 wherein said tackifying resin comprises from about 120 parts to 170 parts per 100 parts combined weight of said ethylene/vinyl acetate and ethylene/n-butyl acrylate copolymers.
Claim 11
Dependent Claim
29 words
A hot-melt composition according to claim 1 wherein the ratio of said ethylene/vinyl acetate copolymer to said ethylene/n-butyl acrylate copolymer is in the range of from 1:3 to 3:1.
Claim 12
Dependent Claim
19 words
A hot-melt composition according to claim 1, wherein said composition has a creep resistance of at least 1,000 minutes.
Claim 13
Dependent Claim
19 words
A hot-melt composition according to claim 11, wherein said composition has a creep resistance of at least 10,000 minutes.
Claim 14
Dependent Claim
17 words
An article, comprising a substrate having a layer of a hot-melt composition according to claim 1 thereon.
Claim 15
Dependent Claim
21 words
An article according to claim 13, wherein said layer of said composition has a thickness of about 50 to 250 μ.
Claim 16
Dependent Claim
21 words
An article according to claim 14 wherein said layer of said composition has a thickness of about 50 to 125 μ.
Claim 17
Dependent Claim
13 words
An article according to claim 15 wherein said substrate is a release liner.
Claim 18
Dependent Claim
115 words
An adhesive rod comprising a hot-melt composition which comprises (a) an ethylene/vinyl acetate copolymer having from 14% to 35% vinyl acetate and a melt index of at least 500, (b ) an ethylene/n-butyl acrylate copolymer having from 25% to 40% n-butyl acrylate, and (c) from 120 to 170 parts of a tackifying resin per 100 parts combined weight of (a)+(b), said tackifying resin having a ring and ball softening point of from 80° C. to 120° C. and a combined aromatic and olefinic content of at least 0.5 mole % wherein said hot-melt composition has a limited open time of at least 5 seconds when deposited on a room temperature substrate in a thin layer.
Claim 19
Dependent Claim
115 words
An adhesive rod comprising a hot-melt composition which comprises (a) an ethylene/vinyl acetate copolymer having from 14% to 35% vinyl acetate and a melt index of at least 500, (b ) an ethylene/n-butyl acrylate copolymer having from 25% to 40% n-butyl acrylate, and (c) from 120 to 170 parts of a tackifying resin per 100 parts combined weight of (a)+(b), said tackifying resin having a ring and ball softening point of from 80° C. to 120° C. and a combined aromatic and olefinic content of at least 0.5 mole % wherein said hot-melt composition has a limited open time of at least 5 seconds when deposited on a room temperature substrate in a thin layer.
Claim 20
Dependent Claim
20 words
An adhesive rod according to claim 17 wherein said hot-melt composition has a creep resistance of at least 10,000 minutes.
Claim 21
Dependent Claim
25 words
An adhesive rod according to claim 18 wherein said rod may be pneumatically or mechanically delivered to a heated well of a hot-melt composition applicator.
Claim 22
Dependent Claim
22 words
An adhesive rod according to claim 17 wherein the layer of said hot-melt composition on said substrate is about 50 to 250μ.
Claim 23
Dependent Claim
27 words
An adhesive rod according to claim 17 wherein said rod may be manually rubbed against a substrate to deposit a thin layer of the hot-melt composition thereon.
Claim 24
Dependent Claim
49 words
A hot-melt composition comprising an ethylene/vinyl acetate copolymer, an ethylene/n-butyl acrylate copolymer having a melt index of at least about 400, and a tackifying resin, wherein said composition has a limited open time of at least 5 seconds when deposited in a thin layer on a room temperature substrate.
Claim 25
Dependent Claim
49 words
A hot-melt composition comprising an ethylene/vinyl acetate copolymer, an ethylene/n-butyl acrylate copolymer having a melt index of at least about 400, and a tackifying resin, wherein said composition has a limited open time of at least 5 seconds when deposited in a thin layer on a room temperature substrate.
Claim 26
Dependent Claim
20 words
A hot-melt composition according to claim 22 wherein said ethylene/n-butyl acrylate copolymer comprises from about 25% to 40% n-butyl acrylate.
Claim 27
Dependent Claim
21 words
A hot-melt composition according to claim 22 wherein said ethylene/vinyl acetate copolymer has a melt index of from 500 to 2500.
Claim 28
Dependent Claim
19 words
A hot-melt composition according to claim 24 wherein said ethylene/vinyl acetate copolymer comprises from 14% to 35% vinyl acetate.
Claim 29
Dependent Claim
27 words
A hot-melt composition according to claim 22 wherein said tackifying resin has a nominal ring and ball softening point of from about 80° C. to 125° C.
Claim 30
Dependent Claim
26 words
A hot-melt composition according to claim 26 wherein said tackifying resin has a combined aromatic and olefinic content of from about 2 to 30 mole %.
Claim 31
Dependent Claim
32 words
A hot-melt composition according to claim 22 wherein said tackifying resin comprises from about 120 parts to 170 parts per 100 parts combined weight of said ethylene/vinyl acetate and ethylene/n-butyl acrylate copolymers.
Claim 32
Dependent Claim
29 words
A hot-melt composition according to claim 22 wherein the ratio of said ethylene/vinyl acetate copolymer to said ethylene/n-butyl acrylate copolymer is in the range of from 1:3 to 3:1.
Claim 33
Dependent Claim
19 words
A hot-melt composition according to claim 22 wherein said composition has a creep resistance of at least 1,000 minutes.
Claim 34
Dependent Claim
114 words
An adhesive rod comprising a hot-melt composition which comprises (a) an ethylene/vinyl acetate copolymer having from 14% to 35% vinyl acetate, (b) an ethylene/n-butyl acrylate copolymer having from 25% to 40% n-butyl acrylate and a melt index of at least 400, and (c) from 120 to 170 parts of a tackifying resin per 100 parts combined weight of (a)+(b), said tackifying resin having a ring and ball softening point of from 80° C. to 120° C. and a combined aromatic and olefinic content of at least 0.5 mole % wherein said hot-melt composition has a limited open time of at least 5 seconds when deposited on a room temperature substrate in a thin layer.
Claim 35
Dependent Claim
114 words
An adhesive rod comprising a hot-melt composition which comprises (a) an ethylene/vinyl acetate copolymer having from 14% to 35% vinyl acetate, (b) an ethylene/n-butyl acrylate copolymer having from 25% to 40% n-butyl acrylate and a melt index of at least 400, and (c) from 120 to 170 parts of a tackifying resin per 100 parts combined weight of (a)+(b), said tackifying resin having a ring and ball softening point of from 80° C. to 120° C. and a combined aromatic and olefinic content of at least 0.5 mole % wherein said hot-melt composition has a limited open time of at least 5 seconds when deposited on a room temperature substrate in a thin layer.
Claim 36
Dependent Claim
20 words
An adhesive rod according to claim 31 wherein the ethylene/vinyl acetate copolymer has a melt index of at least 500.
Claim 37
Dependent Claim
49 words
A hot-melt composition comprising an ehtylene/vinyl acetate copolymer, an ethylene/n-butyl acrylate copolymer having from about 25% to 40% n-butyl acrylate, and a tackifying resin, wherein said composition has an open time of 5 seconds to about 135 seconds when deposited in a thin layer on a room temperature substrate.
Claim 38
Dependent Claim
49 words
A hot-melt composition comprising an ehtylene/vinyl acetate copolymer, an ethylene/n-butyl acrylate copolymer having from about 25% to 40% n-butyl acrylate, and a tackifying resin, wherein said composition has an open time of 5 seconds to about 135 seconds when deposited in a thin layer on a room temperature substrate.
Claim 39
Dependent Claim
21 words
A hot-melt composition according to claim 33 wherein said ethylene/n-butyl acrylate copolymer has a melt index of at least about 400.
Claim 40
Dependent Claim
20 words
A hot-melt composition according to claim 33 wherein said ethylene/vinyl acetate copolymer has a melt index of at least 500.
Claim 41
Dependent Claim
19 words
A hot-melt composition according to claim 35 wherein said ethylene/vinyl acetate copolymer comprises from 14% to 35% vinyl acetate.
Claim 42
Dependent Claim
27 words
A hot-melt composition according to claim 27 wherein said tackifying resin has a nominal ring and ball softening point of from about 80° C. to 125° C.
Claim 43
Dependent Claim
32 words
A hot-melt composition according to claim 33 wherein said tackifying resin comprises from about 120 parts to 170 parts per 100 parts combined weight of said ethylene/vinyl acetate and ethylene/n-butyl acrylate copolymers.
Claim 44
Dependent Claim
29 words
A hot-melt composition according to claim 33 wherein the ratio of said ethylene/vinyl acetate copolymer to said ethylene/n-butyl acrylate copolymer is in the range of from 1:3 to 3:1.
Claim 45
Dependent Claim
19 words
A hot-melt composition according to claim 33 wherein said composition has a creep resistance of at least 10,000 minutes.
Claim 46
Dependent Claim
17 words
A hot-melt composition according to claim 33 wherein said composition is in the form of a rod.
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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) | 1997-05-09 | 1997-11-08 | 1998-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-09 | 2001-11-08 | 2002-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-09 | 2005-11-08 | 2006-05-10 | $7700.00 | Window Closed / Lapsed |