US4358564A
Expired / Lapsed
US
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Process for controlling the viscosity during the preparation of grafted polyethylene and ethylene/alpha olefin waxes
Assignee: Anton Heggenstaller GmbH
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Filing: 1981-05-29
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Granted: 1982-11-09
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Expires: 2001-05-29
Abstract
Abstract This invention relates to a process for controlling viscosity during the preparation of modified or grafted low viscosity polyethylene and ethylene/alpha olefin waxes comprising reacting the low viscosity waxes with an unsaturated polycarboxylic component in the presence of a free radical source and at least one viscosity stabilizer.
Inventors
- 👤 William A. Ames
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:26
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
107 words
A process for the preparation of modified low viscosity polyethylene and ethylene/alpha-olefin copolymer waxes which comprises reacting an unmodified polyethylene wax or an ethylene/alpha-olefin wax containing 99 to 50 percent ethylene, said wax having a melt viscosity of 5 to 40,000 cp. at 150° C., an unsaturation of less than 0.1 percent, with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 4 to 250.
Claim 2
Dependent Claim
107 words
A process for the preparation of modified low viscosity polyethylene and ethylene/alpha-olefin copolymer waxes which comprises reacting an unmodified polyethylene wax or an ethylene/alpha-olefin wax containing 99 to 50 percent ethylene, said wax having a melt viscosity of 5 to 40,000 cp. at 150° C., an unsaturation of less than 0.1 percent, with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 4 to 250.
Claim 3
Dependent Claim
14 words
A process according to claim 1 wherein said unsaturated polycarboxylic component is maleic anhydride.
Claim 4
Dependent Claim
15 words
A process according to claim 2 wherein said free radical source is ditertiary butyl peroxide.
Claim 5
Dependent Claim
14 words
A process according to claim 3 wherein said viscosity stabilizer is tertiary dodecyl mercaptan.
Claim 6
Dependent Claim
12 words
A process according to claim 3 wherein said viscosity stabilizer is 1-dodecanethiol.
Claim 7
Dependent Claim
91 words
A process for the preparation of modified low viscosity polyethylene which comprises reacting an unmodified polyethylene wax having a melt viscosity of 5 to 35,000 cp. at 150° C., an unsaturation of less than 0.1 percent with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 4 to 250.
Claim 8
Dependent Claim
91 words
A process for the preparation of modified low viscosity polyethylene which comprises reacting an unmodified polyethylene wax having a melt viscosity of 5 to 35,000 cp. at 150° C., an unsaturation of less than 0.1 percent with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 4 to 250.
Claim 9
Dependent Claim
14 words
A process according to claim 6 wherein said unsaturated polycarboxylic component is maleic anhydride.
Claim 10
Dependent Claim
15 words
A process according to claim 7 wherein said free radical source is ditertiary butyl peroxide.
Claim 11
Dependent Claim
14 words
A process according to claim 7 wherein said viscosity stabilizer is tertiary dodecyl mercaptan.
Claim 12
Dependent Claim
12 words
A process according to claim 8 wherein said viscosity stabilizer is 1-dodecanethiol.
Claim 13
Dependent Claim
99 words
A process for the preparation of modified low viscosity ethylene/alpha-olefin copolymer waxes which comprises reacting an unmodified ethylene/alpha-olefin wax containing 99 to 50 percent ethylene having a melt viscosity of 5 to 35,000 cp. at 150° C., an unsaturation of less than 0.1 percent with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 4 to 250.
Claim 14
Dependent Claim
99 words
A process for the preparation of modified low viscosity ethylene/alpha-olefin copolymer waxes which comprises reacting an unmodified ethylene/alpha-olefin wax containing 99 to 50 percent ethylene having a melt viscosity of 5 to 35,000 cp. at 150° C., an unsaturation of less than 0.1 percent with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 4 to 250.
Claim 15
Dependent Claim
14 words
A process according to claim 11 wherein said unsaturated polycarboxylic component is maleic anhydride.
Claim 16
Dependent Claim
15 words
A process according to claim 12 wherein said free radical source is ditertiary butyl peroxide.
Claim 17
Dependent Claim
14 words
A process according to claim 13 wherein said viscosity stabilizer is tertiary dodecyl mercaptan.
Claim 18
Dependent Claim
12 words
A process according to claim 13 wherein said viscosity stabilizer is 1-dodecanethiol.
Claim 19
Dependent Claim
93 words
A process for the preparation of modified emulsifiable low viscosity polyethylene wax which comprises reacting an unmodified polyethylene wax having a melt viscosity of 5 to 25,000 cp. at 150° C., an unsaturation of less than 0.1 percent with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 60 to 250.
Claim 20
Dependent Claim
93 words
A process for the preparation of modified emulsifiable low viscosity polyethylene wax which comprises reacting an unmodified polyethylene wax having a melt viscosity of 5 to 25,000 cp. at 150° C., an unsaturation of less than 0.1 percent with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 60 to 250.
Claim 21
Dependent Claim
14 words
A process according to claim 16 wherein said unsaturated polycarboxylic component is maleic anhydride.
Claim 22
Dependent Claim
15 words
A process according to claim 17 wherein said free radical source is ditertiary butyl peroxide.
Claim 23
Dependent Claim
14 words
A process according to claim 18 wherein said viscosity stabilizer is tertiary dodecyl mercaptan.
Claim 24
Dependent Claim
12 words
A process according to claim 18 wherein said viscosity stabilizer is 1-dodecanethiol.
Claim 25
Dependent Claim
100 words
A process for the preparation of modified emulsifiable low viscosity ethylene/alpha-olefin copolymer wax which comprises reacting an unmodified ethylene/alpha-olefin wax containing 99 to 50 percent ethylene having a melt viscosity of 5 to 25,000 cp. at 150° C., an unsaturation of less than 0.1 percent, with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 60 to 250.
Claim 26
Dependent Claim
100 words
A process for the preparation of modified emulsifiable low viscosity ethylene/alpha-olefin copolymer wax which comprises reacting an unmodified ethylene/alpha-olefin wax containing 99 to 50 percent ethylene having a melt viscosity of 5 to 25,000 cp. at 150° C., an unsaturation of less than 0.1 percent, with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 60 to 250.
Claim 27
Dependent Claim
14 words
A process according to claim 21 wherein said unsaturated polycarboxylic component is maleic anhydride.
Claim 28
Dependent Claim
15 words
A process according to claim 22 wherein said free radical source is ditertiary butyl peroxide.
Claim 29
Dependent Claim
14 words
A process according to claim 23 wherein said viscosity stabilizer is tertiary dodecyl mercaptan.
Claim 30
Dependent Claim
12 words
A process according to claim 23 wherein said viscosity stabilizer is 1-dodecanethiol.
Claim 31
Dependent Claim
92 words
A process for the preparation of modified low viscosity polyethylene wax which comprises reacting an unmodified polyethylene wax having a melt viscosity of 5 to 40,000 cp. at 150° C., an unsaturation of less than 0.1 percent with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 100 to 140.
Claim 32
Dependent Claim
92 words
A process for the preparation of modified low viscosity polyethylene wax which comprises reacting an unmodified polyethylene wax having a melt viscosity of 5 to 40,000 cp. at 150° C., an unsaturation of less than 0.1 percent with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 100 to 140.
Claim 33
Dependent Claim
14 words
A process according to claim 26 wherein said unsaturated polycarboxylic component is maleic anhydride.
Claim 34
Dependent Claim
15 words
A process according to claim 27 wherein said free radical source is ditertiary butyl peroxide.
Claim 35
Dependent Claim
14 words
A process according to claim 28 wherein said viscosity stabilizer is tertiary dodecyl mercaptan.
Claim 36
Dependent Claim
12 words
A process according to claim 29 wherein said viscosity stabilizer is 1-dodecanethiol.
Claim 37
Dependent Claim
99 words
A process for the preparation of modified low viscosity ethylene/alpha-olefin copolymer wax which comprises reacting an unmodified ethylene/alpha-olefin wax containing 99 to 50 percent ethylene having a melt viscosity of 5 to 25,000 cp. at 150° C., an unsaturation of less than 0.1 percent, with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 100 to 140.
Claim 38
Dependent Claim
99 words
A process for the preparation of modified low viscosity ethylene/alpha-olefin copolymer wax which comprises reacting an unmodified ethylene/alpha-olefin wax containing 99 to 50 percent ethylene having a melt viscosity of 5 to 25,000 cp. at 150° C., an unsaturation of less than 0.1 percent, with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 100 to 140.
Claim 39
Dependent Claim
14 words
A process according to claim 31 wherein said unsaturated polycarboxylic component is maleic anhydride.
Claim 40
Dependent Claim
15 words
A process according to claim 32 wherein said free radical source is ditertiary butyl peroxide.
Claim 41
Dependent Claim
14 words
A process according to claim 33 wherein said viscosity stabilizer is tertiary dodecyl mercaptan.
Claim 42
Dependent Claim
12 words
A process according to claim 33 wherein said viscosity stabilizer is 1-dodecanethiol.
Claim 43
Dependent Claim
93 words
A process for the preparation of modified unemulsifiable low viscosity polyethylene wax which comprises reacting an unmodified polyethylene wax having a melt viscosity of 500 to 40,000 cp. at 150° C., an unsaturation of less than 0.1 percent with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 4 to 60.
Claim 44
Dependent Claim
93 words
A process for the preparation of modified unemulsifiable low viscosity polyethylene wax which comprises reacting an unmodified polyethylene wax having a melt viscosity of 500 to 40,000 cp. at 150° C., an unsaturation of less than 0.1 percent with about 0.5 to 25 weight percent of an unsaturated polycarboxylic component in the presence of a free radical source and in the presence of at least one viscosity stabilizer at a temperature of from 180° C. to 250° C. to prepare a modified wax having a saponification number of from about 4 to 60.
Claim 45
Dependent Claim
14 words
A process according to claim 36 wherein said unsaturated polycarboxylic component is maleic anhydride.
Claim 46
Dependent Claim
15 words
A process according to claim 37 wherein said free radical source is ditertiary butyl peroxide.
Claim 47
Dependent Claim
14 words
A process according to claim 38 wherein said viscosity stabilizer is tertiary dodecyl mercaptan.
Claim 48
Dependent Claim
12 words
A process according to claim 37 wherein said viscosity stabilizer is 1-dodecanethiol.
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) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |