Patent US4028436A successfully refreshed from Google Patents.
US4028436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt phase process for the preparation of emulsifiable polyethylene waxes
Assignee: Eastman Kodak Co
•
Filing: 1975-04-01
•
Granted: 1977-06-07
•
Expires: 1995-04-01
Abstract
Abstract A melt phase process for the preparation of emulsifiable polyethylene waxes by reacting polyethylene waxes with an unsaturated polycarboxylic component in the presence of a free radical source in the substantial absence of oxygen.
Inventors
- 👤 Richard T. Bogan
- 👤 Claude M. Shelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:21
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
99 words
A process for the preparation of an emulsifiable modified polyethylene composition which comprises reacting in the melt phase process at a temperature of from 200° to 250° C. in the presence of a free radical source and in the presence of less than 5 ppm of oxygen (1) low viscosity polyethylene waxes having a melt viscosity of from about 200 to 600 cp. as measured at 125° C. with (2) at least one unsaturated polycarboxylic component selected from the group consisting of maleic acid, maleic anhydride, fumaric acid, citraconic anhydride and half esters derived from maleic and fumaric acids.
Claim 2
Dependent Claim
99 words
A process for the preparation of an emulsifiable modified polyethylene composition which comprises reacting in the melt phase process at a temperature of from 200° to 250° C. in the presence of a free radical source and in the presence of less than 5 ppm of oxygen (1) low viscosity polyethylene waxes having a melt viscosity of from about 200 to 600 cp. as measured at 125° C. with (2) at least one unsaturated polycarboxylic component selected from the group consisting of maleic acid, maleic anhydride, fumaric acid, citraconic anhydride and half esters derived from maleic and fumaric acids.
Claim 3
Dependent Claim
27 words
A process for the prepartion of an emulsifiable modified polyethylene composition according to claim 1 wherein said low viscosity polyethylene wax is a thermally degraded polyethylene wax.
Claim 4
Dependent Claim
23 words
A process for the preparation of an emulsifiable modified polyethylene composition according to claim 2 wherein said unsaturated polycarboxylic component is maleic anhydride.
Claim 5
Dependent Claim
98 words
A process for the preparation of an emulsifiable modified polyethylene composition which comprises reacting in a melt phase process at a temperature of from 210° to 240° C. in the presence of a free radical source and in the presence of less than 2 ppm of oxygen (1) low viscosity polyethylene waxes having a melt viscosity of from about 200 to 600 cp. as measured at 125° C. with (2) at least one unsaturated polycarboxylic component selected from group consisting of maleic acid, maleic anhydride, fumaric acid, citraconic anhydride and half esters derived from maleic and fumaric acids.
Claim 6
Dependent Claim
98 words
A process for the preparation of an emulsifiable modified polyethylene composition which comprises reacting in a melt phase process at a temperature of from 210° to 240° C. in the presence of a free radical source and in the presence of less than 2 ppm of oxygen (1) low viscosity polyethylene waxes having a melt viscosity of from about 200 to 600 cp. as measured at 125° C. with (2) at least one unsaturated polycarboxylic component selected from group consisting of maleic acid, maleic anhydride, fumaric acid, citraconic anhydride and half esters derived from maleic and fumaric acids.
Claim 7
Dependent Claim
27 words
A process for the preparation of an emulsifiable modified polyethylene composition according to claim 4 wherein said low viscosity polyethylene wax is a thermally degraded polyethylene wax.
Claim 8
Dependent Claim
23 words
A process for the preparation of an emulsifiable modified polyethylene composition according to claim 5 wherein said unsaturated polycarboxylic component is maleic anhydride.
Claim 9
Dependent Claim
93 words
An emulsifiable modified polyethylene composition prepared by reacting in a melt phase process at a temperature of from 200° to 250° C. in the presence of a free radical source and in the presence of less than 5 ppm of oxygen (1) low viscosity polyethylene waxes having a melt viscosity of from about 200 to 600 cp. as measured at 125° C. with (2) at least one unsaturated polycarboxylic component selected from the group consisting of maleic acid, maleic anhydride, fumaric acid, citraconic anhydride and half esters derived from maleic and fumaric acids.
Claim 10
Dependent Claim
93 words
An emulsifiable modified polyethylene composition prepared by reacting in a melt phase process at a temperature of from 200° to 250° C. in the presence of a free radical source and in the presence of less than 5 ppm of oxygen (1) low viscosity polyethylene waxes having a melt viscosity of from about 200 to 600 cp. as measured at 125° C. with (2) at least one unsaturated polycarboxylic component selected from the group consisting of maleic acid, maleic anhydride, fumaric acid, citraconic anhydride and half esters derived from maleic and fumaric acids.
Claim 11
Dependent Claim
22 words
An emulsifiable modified polyethylene composition prepared according to claim 7 wherein said low viscosity polyethylene wax is a thermally degraded polyethylene wax.
Claim 12
Dependent Claim
18 words
An emulsifiable modified polyethylene composition prepared according to claim 8 wherein said unsaturated polycarboxylic component is maleic anhydride.
Claim 13
Dependent Claim
93 words
An emulsifiable modified polyethylene composition prepared by reacting in a melt phase process at a temperature of from 210° to 240° C. in the presence of a free radical source and in the presence of less than 2 ppm of oxygen (1) low viscosity polyethylene waxes having a melt viscosity of from about 200 to 600 cp. as measured at 125° C. with (2) at least one unsaturated polycarboxylic component selected from the group consisting of maleic acid, maleic anhydride, fumaric acid, citraconic anhydride and half esters derived from maleic and fumaric acids.
Claim 14
Dependent Claim
93 words
An emulsifiable modified polyethylene composition prepared by reacting in a melt phase process at a temperature of from 210° to 240° C. in the presence of a free radical source and in the presence of less than 2 ppm of oxygen (1) low viscosity polyethylene waxes having a melt viscosity of from about 200 to 600 cp. as measured at 125° C. with (2) at least one unsaturated polycarboxylic component selected from the group consisting of maleic acid, maleic anhydride, fumaric acid, citraconic anhydride and half esters derived from maleic and fumaric acids.
Claim 15
Dependent Claim
22 words
An emulsifiable modified polyethylene composition prepared according to claim 10 wherein said low viscosity polyethylene wax is a thermally degraded polyethylene wax.
Claim 16
Dependent Claim
18 words
An emulsifiable modified polyethylene composition prepared according to claim 11 wherein said unsaturated polycarboxylic component is maleic anhydride.
References Cited (Backward Citations)
US3278513A
Cited
US3285902A
Cited
US3201381A
Cited
US3433777A
Cited
US3519609A
Cited
US3892717A
Cited
US3859386A
Cited
US3859385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |