US4105718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peroxide treated substantially amorphous polyolefin/hydrocarbon rubber blends useful as pressure-sensitive adhesives
Assignee: Eastman Chemical Co
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Filing: 1977-07-06
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Granted: 1978-08-08
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Expires: 1997-07-06
Abstract
Abstract The invention relates to a process for the treatment of substantially amorphous polyolefin/hydrocarbon rubber blends with peroxides at high temperatures to provide permanently tacky, low viscosity materials which have useful pressure-sensitive adhesive properties. These permanently tacky blends are obtained, for example, by treating a blend of substantially amorphous polyolefins, such as amorphous polypropylene or amorphous propylene/1-butene copolymers, and a hydrocarbon rubber, with peroxides at high temperatures.
Inventors
- 👤 Doyle A. Weemes
- 👤 Richard L. McConnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:36
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/16; C08; C08F; C08F8/00; C08F8/06; C08F8/50; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/16; C09J123/26; C09J123/30; C08K; C08K5/00; C08K5/04; C08K5/14; C08L2207/00; C08L2207/10; C08L2207/14
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
183 words
A process for preparing tacky modified amorphous polyolefin/hydrocarbon rubber compositions useful as pressure sensitive adhesives which comprises reacting a blend comprising at least one hydrocarbon rubber selected from the group consisting of ethylene/propylene copolymer rubber, ethylene/propylene/diene terpolymer or blends of such hydrocarbon rubbers and up to 50 weight percent of at least one 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 cp. 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° C. to 250° C. to provide a low viscosity, permanently tacky hot-melt pressure sensitive adhesive.
Claim 2
Dependent Claim
183 words
A process for preparing tacky modified amorphous polyolefin/hydrocarbon rubber compositions useful as pressure sensitive adhesives which comprises reacting a blend comprising at least one hydrocarbon rubber selected from the group consisting of ethylene/propylene copolymer rubber, ethylene/propylene/diene terpolymer or blends of such hydrocarbon rubbers and up to 50 weight percent of at least one 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 cp. 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° C. 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
183 words
A process for preparing tacky modified amorphous polyolefin/hydrocarbon rubber compositions useful as pressure sensitive adhesives which comprises reacting a blend comprising at least one hydrocarbon rubber selected from the group consisting of ethylene/propylene copolymer rubber, ethylene/propylene/diene terpolymer or blends of such hydrocarbon rubbers and up to 50 weight percent of at least one 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 cp. 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 150° C. to 250° C. to provide a low viscosity, permanently tacky hot-melt pressure sensitive adhesive.
Claim 6
Dependent Claim
183 words
A process for preparing tacky modified amorphous polyolefin/hydrocarbon rubber compositions useful as pressure sensitive adhesives which comprises reacting a blend comprising at least one hydrocarbon rubber selected from the group consisting of ethylene/propylene copolymer rubber, ethylene/propylene/diene terpolymer or blends of such hydrocarbon rubbers and up to 50 weight percent of at least one 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 cp. 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 150° C. 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
184 words
A process for preparing tacky modified amorphous polyolefin/hydrocarbon rubber compositions useful as pressure sensitive adhesives which comprises reacting a blend comprising at least one hydrocarbon rubber selected from the group consisting of ethylene/propylene copolymer rubber, ethylene/propylene diene terpolymer or blends of such hydrocarbon rubbers and up to 50 weight percent of at least one 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 cp. 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° C. to 225° C. to provide a low viscosity, permanently tacky hot-melt pressure sensitive adhesive.
Claim 10
Dependent Claim
184 words
A process for preparing tacky modified amorphous polyolefin/hydrocarbon rubber compositions useful as pressure sensitive adhesives which comprises reacting a blend comprising at least one hydrocarbon rubber selected from the group consisting of ethylene/propylene copolymer rubber, ethylene/propylene diene terpolymer or blends of such hydrocarbon rubbers and up to 50 weight percent of at least one 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 cp. 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° C. 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
180 words
A process for preparing tacky modified amorphous polyolefin/hydrocarbon rubber compositions useful as pressure sensitive adhesives which comprises reacting a blend comprising at least one hydrocarbon rubber selected from the group consisting of ethylene/propylene copolymer rubber, ethylene/propylene/diene terpolymer or blends of such hydrocarbon rubbers and up to 50 weight percent of at least one 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 cp. 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
180 words
A process for preparing tacky modified amorphous polyolefin/hydrocarbon rubber compositions useful as pressure sensitive adhesives which comprises reacting a blend comprising at least one hydrocarbon rubber selected from the group consisting of ethylene/propylene copolymer rubber, ethylene/propylene/diene terpolymer or blends of such hydrocarbon rubbers and up to 50 weight percent of at least one 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 cp. 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)
US3449191A
Cited
US3584080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-07 | 1982-02-06 | 1982-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-07 | 1986-02-06 | 1986-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-07 | 1990-02-06 | 1990-08-08 | $7700.00 | Window Closed / Lapsed |