US4112208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peroxide treated substantially amorphous polyolefins useful as pressure-sensitive adhesives
Assignee: Eastman Chemical Co
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Filing: 1977-07-06
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Granted: 1978-09-05
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Expires: 1997-07-06
Abstract
Abstract The invention relates to a process for the treatment of substantially amorphous polyolefins with peroxides at high temperatures to provide permanently tacky, low viscosity materials which have useful pressure-sensitive adhesive properties. These permanently tacky amorphous polyolefin homo- and copolymers, as well as blends of such amorphous polyolefins with crystalline polyolefins containing up to 20 weight percent crystalline polyolefin, are novel pressure-sensitive adhesives. These permanently tacky polymers are obtained, for example, by treating substantially amorphous polyolefins, such as amorphous polypropylene or amorphous propylene/1-butene copolymers, with peroxides at high temperatures.
Inventors
- 👤 Richard L. McConnell
- 👤 Doyle A. Weemes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:53
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; B; B29; B29C; B29C48/00; B29C48/15; B29C48/154; C08; C08F; C08F8/00; C08F8/50; B29C48/001; B29C48/0021; B29C48/03; B29C48/07; B29C48/08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/28; C08L2666/34
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
145 words
A process for preparing tacky modified amorphous polyolefin compositions useful as pressure sensitive adhesives which comprises reacting substantially amorphous polyolefin selected from the group consisting of substantially amorphous homopolymers of 1-olefins containing 3 to 5 carbon atoms, substantially amorphous copolymers prepared from either ethylene and 1-olefins containing 3 to 5 carbon atoms or propylene and 1-butene, and substantially amorphous propylene or 1-butene/higher 1-olefin copolymers containing less than 40 mole percent of at least one higher 1-olefin of the group consisting essentially of 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene having a melt viscosity of about 100 to 200,000 at 190° C. with about 2 to 25 weight percent of at least one peroxide selected from the group consisting of ditertiarybutyl peroxide, 2,5-dimethyl-2,5-di(tertiarybutylperoxy)hexane, dicumyl peroxide, and cumene hydroperoxide at a temperature of 150° to 250° C. to provide a low viscosity, permanently tacky hot-melt pressure sensitive adhesive.
Claim 2
Dependent Claim
145 words
A process for preparing tacky modified amorphous polyolefin compositions useful as pressure sensitive adhesives which comprises reacting substantially amorphous polyolefin selected from the group consisting of substantially amorphous homopolymers of 1-olefins containing 3 to 5 carbon atoms, substantially amorphous copolymers prepared from either ethylene and 1-olefins containing 3 to 5 carbon atoms or propylene and 1-butene, and substantially amorphous propylene or 1-butene/higher 1-olefin copolymers containing less than 40 mole percent of at least one higher 1-olefin of the group consisting essentially of 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene having a melt viscosity of about 100 to 200,000 at 190° C. with about 2 to 25 weight percent of at least one peroxide selected from the group consisting of ditertiarybutyl peroxide, 2,5-dimethyl-2,5-di(tertiarybutylperoxy)hexane, dicumyl peroxide, and cumene hydroperoxide at a temperature of 150° to 250° C. to provide a low viscosity, permanently tacky hot-melt pressure sensitive adhesive.
Claim 3
Dependent Claim
11 words
A process according to claim 1 wherein said peroxide is 2,5-dimethyl-2,5-di(tertiarybutylperoxy)hexane.
Claim 4
Dependent Claim
13 words
A process according to claim 1 wherein said peroxide is ditertiary butyl peroxide.
Claim 5
Dependent Claim
144 words
A process for preparing tacky modified amorphous polyolefin compositions useful as pressure sensitive adhesives which comprises reacting substantially amorphous polyolefin selected from the group consisting of substantially amorphous homopolymers of 1-olefins containing 3 to 5 carbon atoms, substantially amorphous copolymers prepared from either ethylene and 1-olefins containing 3 to 5 carbon atoms or propylene and 1-butene, and substantially amorphous propylene or 1-butene/higher 1-olefin copolymers containing less than 40 mole percent of at least one higher 1-olefin of the group consisting essentially of 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene having a melt viscosity of about 100 to 200,000 at 190° C. with about 3 to 20 weight percent of least one peroxide selected from the group consisting of ditertiarybutyl peroxide, 2,5-dimethyl-2,5-2,5-di(tertiarybutylperoxy)hexane, dicumyl peroxide, and cumene hydroperoxide at a temperature of 150° to 250° C. to provide a low viscosity, permanently tacky hot-melt pressure sensitive adhesive.
Claim 6
Dependent Claim
144 words
A process for preparing tacky modified amorphous polyolefin compositions useful as pressure sensitive adhesives which comprises reacting substantially amorphous polyolefin selected from the group consisting of substantially amorphous homopolymers of 1-olefins containing 3 to 5 carbon atoms, substantially amorphous copolymers prepared from either ethylene and 1-olefins containing 3 to 5 carbon atoms or propylene and 1-butene, and substantially amorphous propylene or 1-butene/higher 1-olefin copolymers containing less than 40 mole percent of at least one higher 1-olefin of the group consisting essentially of 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene having a melt viscosity of about 100 to 200,000 at 190° C. with about 3 to 20 weight percent of least one peroxide selected from the group consisting of ditertiarybutyl peroxide, 2,5-dimethyl-2,5-2,5-di(tertiarybutylperoxy)hexane, dicumyl peroxide, and cumene hydroperoxide at a temperature of 150° to 250° C. to provide a low viscosity, permanently tacky hot-melt pressure sensitive adhesive.
Claim 7
Dependent Claim
11 words
A process according to claim 4 wherein said peroxide is 2,5-dimethyl-2,5-di(tertiarybutylperoxy)hexane.
Claim 8
Dependent Claim
13 words
A process according to claim 4 wherein said peroxide is ditertiary butyl peroxide.
Claim 9
Dependent Claim
145 words
A process for preparing tacky modified amorphous polyolefin compositions useful as pressure sensitive adhesives which comprises reacting substantially amorphous polyolefin selected from the group consisting of substantially amorphous homopolymers of 1-olefins containing 3 to 5 carbon atoms, substantially amorphous copolymers prepared from either ethylene and 1-olefins containing 3 to 5 carbon atoms or propylene and 1-butene, and substantially amorphous propylene or 1-butene/higher 1-olefin copolymers containing less than 40 mole percent of at least one higher 1-olefin of the group consisting essentially of 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene having a melt viscosity of about 100 to 200,000 at 190° C. with about 3 to 20 weight percent of at least one peroxide selected from the group consisting of ditertiarybutyl peroxide, 2,5-dimethyl-2,5-di(tertiarybutylperoxy)hexane, dicumyl peroxide, and cumene hydroperoxide at a temperature of 175° to 225° C. to provide a low viscosity, permanently tacky hot-melt pressure sensitive adhesive.
Claim 10
Dependent Claim
145 words
A process for preparing tacky modified amorphous polyolefin compositions useful as pressure sensitive adhesives which comprises reacting substantially amorphous polyolefin selected from the group consisting of substantially amorphous homopolymers of 1-olefins containing 3 to 5 carbon atoms, substantially amorphous copolymers prepared from either ethylene and 1-olefins containing 3 to 5 carbon atoms or propylene and 1-butene, and substantially amorphous propylene or 1-butene/higher 1-olefin copolymers containing less than 40 mole percent of at least one higher 1-olefin of the group consisting essentially of 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene having a melt viscosity of about 100 to 200,000 at 190° C. with about 3 to 20 weight percent of at least one peroxide selected from the group consisting of ditertiarybutyl peroxide, 2,5-dimethyl-2,5-di(tertiarybutylperoxy)hexane, dicumyl peroxide, and cumene hydroperoxide at a temperature of 175° to 225° C. to provide a low viscosity, permanently tacky hot-melt pressure sensitive adhesive.
Claim 11
Dependent Claim
11 words
A process according to claim 7 wherein said peroxide is 2,5-dimethyl-2,5-di(tertiarybutylperoxy)hexane.
Claim 12
Dependent Claim
13 words
A process according to claim 7 wherein said peroxide is ditertiary butyl peroxide.
Claim 13
Dependent Claim
143 words
A process for preparing tacky modified amorphous polyolefin compositions useful as pressure sensitive adhesives which comprises reacting substantially amorphous polyolefin selected from the group consisting of substantially amorphous homopolymers of 1-olefins containing 3 to 5 carbon atoms, substantially amorphous copolymers prepared from either ethylene and 1-olefins containing 3 to 5 carbon atoms or propylene and 1-butene, and substantially amorphous propylene or 1-butene/higher 1-olefin copolymers containing less than 40 mole percent of at least one higher 1-olefin of the group consisting essentially of 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene having a melt viscosity of about 100 to 200,000 at 190° C. with about 3 to 20 weight percent of at least one peroxide selected from the group consisting of ditertiarybutyl peroxide. 2,5-dimethyl-2,5-di(tertiarybutylperoxy)hexane, dicumyl peroxide, and cumene hydroperoxide at a temperature of about 200° C. to provide a low viscosity, permanently tacky hot-melt pressure-sensitive adhesive.
Claim 14
Dependent Claim
143 words
A process for preparing tacky modified amorphous polyolefin compositions useful as pressure sensitive adhesives which comprises reacting substantially amorphous polyolefin selected from the group consisting of substantially amorphous homopolymers of 1-olefins containing 3 to 5 carbon atoms, substantially amorphous copolymers prepared from either ethylene and 1-olefins containing 3 to 5 carbon atoms or propylene and 1-butene, and substantially amorphous propylene or 1-butene/higher 1-olefin copolymers containing less than 40 mole percent of at least one higher 1-olefin of the group consisting essentially of 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene having a melt viscosity of about 100 to 200,000 at 190° C. with about 3 to 20 weight percent of at least one peroxide selected from the group consisting of ditertiarybutyl peroxide. 2,5-dimethyl-2,5-di(tertiarybutylperoxy)hexane, dicumyl peroxide, and cumene hydroperoxide at a temperature of about 200° C. to provide a low viscosity, permanently tacky hot-melt pressure-sensitive adhesive.
Claim 15
Dependent Claim
11 words
A process according to claim 10 wherein said peroxide is 2,5-dimethyl-2,5-di(tertiarybutylperoxy)hexane.
Claim 16
Dependent Claim
13 words
A process according to claim 10 wherein said peroxide is ditertiary butyl peroxide.
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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |