US4022728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt pressure sensitive adhesives
Assignee: Eastman Kodak Co
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Filing: 1975-06-10
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Granted: 1977-05-10
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Expires: 1995-06-10
Abstract
Abstract The hot melt pressure sensitive adhesives of the present inventions are blends comprising amorphous polyolefin, a low molecular weight substantially amorphous elastomer, a liquid tackifying resin, and crystalline polypropylene. These pressure sensitive adhesives have a novel combination of properties including good adhesive properties at low temperatures.
Inventors
- 👤 Jimmy R. Trotter
- 👤 Frederick D. Petke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:32
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/10; C09J123/12; C09J123/16; C08; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
122 words
An adhesive composition capable of being used as a hot melt adhesive for securing rubber members to metal surfaces comprising a blend of (1) 40 to 70 weight percent amorphous polyalphaolefin selected from the group consisting of amorphous polypropylene and amorphous propylene-alpha-mololefin copolymer, (2) 5 to 30 weight percent of at least one tackifying resin liquid at ambient temperatures selected from the group consisting of low molecular weight hydrocarbon resin or liquid natural ester resin tackifier, (3) 15 to 50 weight percent of a low molecular weight substantially amorphous elastomer comprising homopolymers and copolymers of isobutylene having a glass transition temperature below -30° C., and (4) 1 to 2 weight percent crystalline polypropylene having a melt flow rate of 4-200 (ASTM D-1238).
Claim 2
Dependent Claim
122 words
An adhesive composition capable of being used as a hot melt adhesive for securing rubber members to metal surfaces comprising a blend of (1) 40 to 70 weight percent amorphous polyalphaolefin selected from the group consisting of amorphous polypropylene and amorphous propylene-alpha-mololefin copolymer, (2) 5 to 30 weight percent of at least one tackifying resin liquid at ambient temperatures selected from the group consisting of low molecular weight hydrocarbon resin or liquid natural ester resin tackifier, (3) 15 to 50 weight percent of a low molecular weight substantially amorphous elastomer comprising homopolymers and copolymers of isobutylene having a glass transition temperature below -30° C., and (4) 1 to 2 weight percent crystalline polypropylene having a melt flow rate of 4-200 (ASTM D-1238).
Claim 3
Dependent Claim
12 words
An adhesive composition according to claim 1 wherein said poly-alpha-olefin is polypropylene.
Claim 4
Dependent Claim
18 words
An adhesive composition according to claim 2 wherein said tackifying resin is a low molecular weight hydrocarbon resin.
Claim 5
Dependent Claim
13 words
An adhesive composition according to claim 3 wherein said amorphous elastomer is polyisobutylene.
Claim 6
Dependent Claim
123 words
An adhesive composition capable of being used as a hot melt adhesive for securing rubber members to metal surfaces comprising a blend of (1) 45 to 55 weight percent amorphous polyalphaolefin selected from the group consisting of amorphous polypropylene and amorphous propylene-alpha-monolefin copolymer (2) 15 to 25 weight percent of at least one tackifying resin liquid at ambient temperatures selected from the group consisting of low molecular weight hydrocarbon resin or liquid natural ester resin (3) 25 to 35 weight percent of a low molecular weight substantially amorphous elastomer consisting essentially of homopolymers and copolymers of isobutylene having a glass transition temperature below -30° C., and (4) 1 to 1.5 weight percent crystalline polypropylene having a melt flow rate of 20-100 (ASTM D-1238).
Claim 7
Dependent Claim
123 words
An adhesive composition capable of being used as a hot melt adhesive for securing rubber members to metal surfaces comprising a blend of (1) 45 to 55 weight percent amorphous polyalphaolefin selected from the group consisting of amorphous polypropylene and amorphous propylene-alpha-monolefin copolymer (2) 15 to 25 weight percent of at least one tackifying resin liquid at ambient temperatures selected from the group consisting of low molecular weight hydrocarbon resin or liquid natural ester resin (3) 25 to 35 weight percent of a low molecular weight substantially amorphous elastomer consisting essentially of homopolymers and copolymers of isobutylene having a glass transition temperature below -30° C., and (4) 1 to 1.5 weight percent crystalline polypropylene having a melt flow rate of 20-100 (ASTM D-1238).
Claim 8
Dependent Claim
12 words
An adhesive composition according to claim 5 wherein said poly-alpha-olefin is polypropylene.
Claim 9
Dependent Claim
18 words
An adhesive composition according to claim 6 wherein said tackifying resin is a low molecular weight hydrocarbon resin.
Claim 10
Dependent Claim
13 words
An adhesive composition according to claim 7 wherein said amorphous elastomer is polyisobutylene.
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |