Patent US5373049A successfully refreshed from Google Patents.
US5373049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cool melt glue
Assignee: KEY BANK OF MAINE
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Filing: 1991-05-31
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Granted: 1994-12-13
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Expires: 2011-05-31
Abstract
Abstract Hot-melt adhesives, useful for both glue-pot and glue-gun applications, are formulated so that they can be applied at temperatures no higher than 280° F. and preferably at temperatures of at most 250° F. The adhesive compositions have a heat resistance of at least 125° F. and are readily shaped into glue sticks for use in glue guns, The adhesive for the hot-melt adhesive compositions is suitably compounded with tackifying resin and/or wax. The resulting composition has a sharp viscosity profile, which is readily achieved, e.g., by using a high melt index adhesive polymer as an essential component.
Inventors
- 👤 Robert L. Ornstern
- 👤 Peter S. Melendy
- 👤 Dennis J. Fitzmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:25
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C08; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
45 words
In a plural component hot-melt adhesive composition having hot-melt adhesive polymer as its backbone, the improvement wherein the backbone adhesive polymer is polymer having a melt index in excess of 750 g/10 min. and the composition has an application temperature below or about 280° F.
Claim 2
Dependent Claim
45 words
In a plural component hot-melt adhesive composition having hot-melt adhesive polymer as its backbone, the improvement wherein the backbone adhesive polymer is polymer having a melt index in excess of 750 g/10 min. and the composition has an application temperature below or about 280° F.
Claim 3
Dependent Claim
68 words
A hot-melt adhesive composition of claim 1 which is suitable for a glue gun glue stick and which (a) has a heat resistance of at least 125° F., (b) has an application temperature of about 280° F. or less when in glue gun glue stick form (c) has acceptable bond strength, (d) does not soften at ambient temperature, (e) has hot-melt adhesive as its sole essential adhesive component.
Claim 4
Dependent Claim
79 words
A plural component hot-melt adhesive composition of claim 2 which has a heat resistance of at least 125° F., a bond-strength profile at least equivalent to that of traditional hot-melts, a Shore "A" hardness durometer reading at ambient temperature of from 50 to 100, hot-melt adhesive as its sole essential adhesive component, and a viscosity profile sharp enough to allow an application temperature within the range of from 180° to 280° F. when in glue gun glue stick form.
Claim 5
Dependent Claim
84 words
A hot-melt adhesive composition having an application temperature in an approximate range of from 180° to 250° F. and comprising an admixture of a) adhesive polymer having a melt index in excess of 750 g/10 min. with at least one member selected from the group consisting of b) tackifying resin and c) wax, the composition having from 20 to 80 parts by weight of (a), up to about 60 parts by weight of (b) and up to about 40 parts by weight of (c).
Claim 6
Dependent Claim
84 words
A hot-melt adhesive composition having an application temperature in an approximate range of from 180° to 250° F. and comprising an admixture of a) adhesive polymer having a melt index in excess of 750 g/10 min. with at least one member selected from the group consisting of b) tackifying resin and c) wax, the composition having from 20 to 80 parts by weight of (a), up to about 60 parts by weight of (b) and up to about 40 parts by weight of (c).
Claim 7
Dependent Claim
31 words
A hot-melt adhesive composition of claim 4 which further comprises up to 40 parts by weight of adhesive polymer having a melt index which is less than about 650 g/10 min.
Claim 8
Dependent Claim
29 words
A hot-melt adhesive composition of claim 4 which is suitable for use as a glue-stick composition and wherein the melting point of each component does not exceed 330° F.
Claim 9
Dependent Claim
65 words
A hot-melt adhesive composition of claim 4 having a viscosity at 200° F. of from 500 to 80,000 cp, heat resistance under a load of 2 pounds in the range of from 110° to 150° F., a ring and ball melting point in the range of from 150° to 240° F., and a thin-film cracking temperature in the range of from 0° to 40° F.
Claim 10
Dependent Claim
28 words
A hot-melt adhesive composition of claim 3 wherein (a) is an ethylene polymer having from 0 to 29 percent by weight of monomer units derived from vinyl acetate.
Claim 11
Dependent Claim
36 words
A hot-melt adhesive composition of claim 7 wherein (a) is an ethylene/(vinyl acetate) polymer having a vinyl acetate monomer content of from 18 to 19 percent by weight or from 27 to 29 percent by weight.
Claim 12
Dependent Claim
24 words
A composition of claim 1 wherein the backbone adhesive polymer comprises an EVA polymer having a melt index in excess of 750 g/10 min.
Claim 13
Dependent Claim
22 words
A composition of claim 1 wherein the backbone adhesive polymer comprises polyethylene having a melt index in excess of 750 g/10 min.
Claim 14
Dependent Claim
22 words
A composition of claim 1 wherein the backbone adhesive polymer comprises polypropylene having a melt index in excess of 750 g/10 min.
Claim 15
Dependent Claim
21 words
A hot-melt adhesive composition of claim 1 having a viscosity profile sharp enough to allow an application temperature of 200° F.
Claim 16
Dependent Claim
102 words
A plural-component hot-melt adhesive composition of claim 1, an essential polymeric component of which is a high-melt-index polymer selected from the group consisting of an EVA polymer, polyethylene and polypropylene, the composition being one which (a) has a heat resistance (under a load of two pounds) of at least 125° F., (b) has a bond strength profile at least equivalent to that of traditional hot melts, (c) does not soften at ambient temperature, and (d) has a viscosity profile which is sharp enough to allow a glue gun glue stick application temperature within the range of from 180° to about 280° F.
Claim 17
Dependent Claim
34 words
A hot-melt adhesive composition of claim 14 which comprises an amount of adhesive polymer having a melt index of less than about 650 g/10 min., the amount being up to 40 parts by weight.
Claim 18
Dependent Claim
23 words
A hot-melt adhesive composition of claim 14 wherein the essential polymeric component has a melt index in excess of about 2,000 g/10 min.
Claim 19
Dependent Claim
23 words
A hot-melt adhesive composition of claim 14 which has a Shore "A" hardness durometer reading at ambient temperature of from 50 to 100.
Claim 20
Dependent Claim
39 words
A hot-melt adhesive composition of claim 14 which has a ring and ball melting point in the range of from 150° to 240° F. and has a film cracking temperature in the range of from 0° to 40° F.
Claim 21
Dependent Claim
21 words
A hot-melt adhesive composition of claim 14, each component of which has a melting point which does not exceed 330° F.
Claim 22
Dependent Claim
16 words
A hot-melt adhesive composition of claim 14 wherein the essential polymeric component is an EVA polymer.
Claim 23
Dependent Claim
14 words
A hot-melt adhesive composition of claim 14 wherein the essential polymeric component is polyethylene.
Claim 24
Dependent Claim
14 words
A hot-melt adhesive composition of claim 14 wherein the essential polymeric component is polypropylene.
Claim 25
Dependent Claim
31 words
A hot-melt adhesive composition of claim 14 wherein the essential polymeric component is an ethylene polymer having from 0 to 29 percent by weight of monomer units derived from vinyl acetate.
Claim 26
Dependent Claim
31 words
A hot-melt adhesive composition of claim 14 wherein the essential polymeric component is an ethylene/(vinyl acetate) polymer having a vinyl acetate monomer content of from 18 to 29 percent by weight.
Claim 27
Dependent Claim
73 words
A hot-melt adhesive composition of claim 14 comprising an admixture of (a) the essential polymeric component with at least one member selected from the group consisting of (b) tackifying resin and (c) wax, the admixture having from 20 to 80 parts by weight of (a), up to about 60 parts by weight of (b) and up to about 40 parts by weight of (c), based on 100 parts by weight of the composition.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-12 | 1998-06-13 | 1998-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-12 | 2002-06-13 | 2002-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-12 | 2006-06-13 | 2006-12-13 | $7700.00 | Window Closed / Lapsed |