US4500661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive composition
Assignee: Chevron USA Inc
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Filing: 1980-11-24
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Granted: 1985-02-19
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Expires: 2000-11-24
Abstract
Abstract A novel adhesive composition effective in bonding low-energy plastic surfaces to each other which provides a tensile lap shear strength in excess of about 520 pounds per square inch gauge which comprises (1) an ethylene-vinyl ester copolymer having from about four to about 30 weight percent of a vinyl ester and a melt index of about 0.5 to about 75; (2) a tackifier selected from the group consisting of (a) a rosin, (b) a rosin ester, (c) a terpene resin, (d) a terpene-phenolic resin and (e) a rosin-modified phenolic resin; and (3) a polyethylene wax having a molecular weight of about 750 to about 3000, a penetration of about 0.25 to about 1.5, a density of about 0.93 to about 0.97, a melting point of at least about 110 DEG C. and a linearity of at least about 70 percent, said novel adhesive composition having a Ring and Ball softening point of at least about 110 DEG C.
Inventors
- 👤 Pallavoor R. Lakshmanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:36
CPC Classifications
C; C09; C09J; C09J191/00; C09J191/06; C09J191/08; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C08; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
156 words
A novel adhesive composition effective in bonding low-energy plastic surfaces to each other which provides a tensile lap shear strength in excess of about 520 pounds per square inch gauge which comprises (1) one ethylene-vinyl ester copolymer having from about four to about 30 wieght percent of a vinyl ester and a melt index of about 0.5 to about 75; (2) a tackifier selected from the group consisting of (a) a rosin, (b) a rosin ester, (c) a terpene resin, (d) a terpene-phenolic resin and (e) a rosin-modified phenolic resin; and (3) a polyethylene wax having a molecular weight of about 750 to about 3000, a penetration of about 0.25 to about 1.5, a density of about 0.93 to about 0.97, a melting point of at least about 110° C. and a linearity of at least about 70 percent, said novel adhesive composition having a Ring and Ball softening point of at least about 110° C.
Claim 2
Dependent Claim
156 words
A novel adhesive composition effective in bonding low-energy plastic surfaces to each other which provides a tensile lap shear strength in excess of about 520 pounds per square inch gauge which comprises (1) one ethylene-vinyl ester copolymer having from about four to about 30 wieght percent of a vinyl ester and a melt index of about 0.5 to about 75; (2) a tackifier selected from the group consisting of (a) a rosin, (b) a rosin ester, (c) a terpene resin, (d) a terpene-phenolic resin and (e) a rosin-modified phenolic resin; and (3) a polyethylene wax having a molecular weight of about 750 to about 3000, a penetration of about 0.25 to about 1.5, a density of about 0.93 to about 0.97, a melting point of at least about 110° C. and a linearity of at least about 70 percent, said novel adhesive composition having a Ring and Ball softening point of at least about 110° C.
Claim 3
Dependent Claim
30 words
An adhesive composition according to claim 1 wherein said ethylene-vinyl ester copolymer is selected from the group consisting of ethylene-vinyl acetate, ethylene-vinyl formate, ethylene-vinyl propionate, ethylene-vinyl butyrate, and mixtures thereof.
Claim 4
Dependent Claim
23 words
An adhesive composition according to claim 1 wherein said copolymer contains from about six to about 25 weight percent of a vinyl ester.
Claim 5
Dependent Claim
20 words
An adhesive composition according to claim 1 wherein said copolymer has a melt index of about 2.0 to about 25.
Claim 6
Dependent Claim
21 words
An adhesive composition according to claim 1 wherein said tackifier has a softening point of about 40° to about 150° C.
Claim 7
Dependent Claim
21 words
An adhesive composition according to claim 1 wherein said tackifier has a softening point of about 65° to about 135° C.
Claim 8
Dependent Claim
33 words
An adhesive composition according to claim 1 wherein said rosin is selected from the group consisting of gum rosin, wood rosin, tall oil rosin, distilled rosin, hydrogenated rosin, dimerized rosin, and polymerized rosin.
Claim 9
Dependent Claim
31 words
An adhesive composition according to claim 1 wherein said rosin ester is selected from the group consisting of glycerine and pentaerythritol esters of stabilized, hydrogenated, polymerized, disproportionated, dimerized and unmodified rosin.
Claim 10
Dependent Claim
23 words
An adhesive composition according to claim 1 wherein said terpene resin is selected from the group consisting of polyterpene and polymerized beta-pinene resins.
Claim 11
Dependent Claim
22 words
An adhesive composition according to claim 1 wherein said terpene-phenolic resin is the condensation product of phenol with terpene alcohol or alpha-terpinene.
Claim 12
Dependent Claim
15 words
An adhesive composition according to claim 1 wherein said tackifier is a rosin-modified phenolic resin.
Claim 13
Dependent Claim
21 words
An adhesive composition according to claim 1 wherein said polyethylene wax has a molecular weight of about 800 to about 2000.
Claim 14
Dependent Claim
21 words
An adhesive composition according to claim 1 wherein said polyethylene wax is composed of at least about 90 percent linear molecules.
Claim 15
Dependent Claim
22 words
An adhesive composition according to claim 1 wherein said polyethylene wax is composed of about 90 to about 95 percent linear molecules.
Claim 16
Dependent Claim
20 words
An adhesive composition according to claim 1 wherein said polyethylene wax has a penetration of about 0.75 to about 1.00.
Claim 17
Dependent Claim
20 words
An adhesive composition according to claim 1 wherein said polyethylene wax has a density of about 0.94 to about 0.96.
Claim 18
Dependent Claim
22 words
An adhesive composition according to claim 1 wherein said polyethylene wax has a melting point of about 110° to about 130° C.
Claim 19
Dependent Claim
21 words
An adhesive composition according to claim 1 having a Ring and Ball softening point of about 115° to about 130° C.
Claim 20
Dependent Claim
46 words
An adhesive composition according to claim 1 wherein said ethylene-vinyl ester copolymer is about 15 to about 55 weight percent; said tackifier is about 25 to about 45 weight percent; and said polyethylene wax is about five to about 55 weight percent of the total composition.
Claim 21
Dependent Claim
46 words
An adhesive composition according to claim 1 wherein said ethylene-vinyl ester copolymer is about 25 to about 55 weight percent; said tackifier is about 25 to about 40 weight percent; and said polyethylene wax is about five to about 50 weight percent of the total composition.
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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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |