US4518434A
Expired / Lapsed
US
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Carbon black and process for preparing same
Assignee: Phillips Petroleum Co
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Filing: 1983-07-29
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Granted: 1985-05-21
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Expires: 2003-07-29
Abstract
Abstract Carbon black which has been treated with organic peroxides imparts high scorch resistance to rubber into which it has been compounded.
Inventors
- 👤 Charles R. Wilder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:32
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/565; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
A process which reduces the surface area of carbon black and increases the structure, said process consisting essentially of mixing from about 1 to about 30 parts by weight of an organic peroxide represented by the formula R--O--O--R' wherein R and R' comprises hydrogen and carbon and can be the same or different and each R and R' contains from 1 to about 16 carbon atoms with each 100 parts by weight of a carbon black formed in an oil furnace process and characterized by a surface area in the range of 20-200 m 2 /g, a DBP structure in the range of 20-200 cm 3 /g and a pH in the range of 5-10 to form a treatment mixture; and heating the treatment mixture.
Claim 2
Dependent Claim
125 words
A process which reduces the surface area of carbon black and increases the structure, said process consisting essentially of mixing from about 1 to about 30 parts by weight of an organic peroxide represented by the formula R--O--O--R' wherein R and R' comprises hydrogen and carbon and can be the same or different and each R and R' contains from 1 to about 16 carbon atoms with each 100 parts by weight of a carbon black formed in an oil furnace process and characterized by a surface area in the range of 20-200 m 2 /g, a DBP structure in the range of 20-200 cm 3 /g and a pH in the range of 5-10 to form a treatment mixture; and heating the treatment mixture.
Claim 3
Dependent Claim
39 words
A process as in claim 1 wherein the treatment mixture is heated at a temperature in the range of 100° C. to about 400° C. for a time period in the range of about 0.1 to about 100 hours.
Claim 4
Dependent Claim
41 words
A process as in claim 3 wherein the treatment mixture is heated at a temperature in the range of about 100° C. to about 200° C. for a time period in the range of from about 0.1 to about 3 hours.
Claim 5
Dependent Claim
33 words
A process as in claim 3 wherein the organic peroxide is represented by the formula R--O--O--R', where R and R' are hydrocarbyl and each contains from about 4 to about 12 carbon atoms.
Claim 6
Dependent Claim
49 words
A process as in claim 4 wherein the organic peroxide is selected from the group consisting of [α,α-dimethyl-α(t-butylperoxy)methyl]benzene, dicumyl peroxide, 2,5-bis(t-butylperoxy)-2,5-dimethyl hexane, and 2,5-bis(t-butylperoxy)-2,5-dimethyl hexyne-3 and from about 2 to about 20 parts by weight of organic peroxide is mixed with each 100 parts by weight of carbon black.
Claim 7
Dependent Claim
54 words
A carbon black which has been treated by a process consisting essentially of applying an organic peroxide to the carbon black and heating the carbon black having applied organic peroxide thereon at a temperature in the range of about 100° to about 300° C. for a period of time of at least 0.1 hours.
Claim 8
Dependent Claim
54 words
A carbon black which has been treated by a process consisting essentially of applying an organic peroxide to the carbon black and heating the carbon black having applied organic peroxide thereon at a temperature in the range of about 100° to about 300° C. for a period of time of at least 0.1 hours.
Claim 9
Dependent Claim
106 words
A carbon black as in claim 6 wherein the carbon black is characterized by a surface area in the range of 20-200 m 2 /g, a DBP structure in the range of 20-200 cm 3 /g and a pH in the range of 5-10 and the organic peroxide is characterized by the formula R--O--O--R' in which R and R' can be the same or different and comprise hydrocarbyl groups containing in the range of from about 4 to about 12 carbon atoms, from about 1 to about 30 parts by weight of organic peroxide having been applied to each 100 parts by weight of carbon black.
Claim 10
Dependent Claim
50 words
A process consisting essentially of applying a liquid or solution of organic peroxide to a carbon black and heating the carbon black having applied organic peroxide thereon at a temperature in the range of about 100° to about 300° C. for a period of time of at least 0.1 hours.
Claim 11
Dependent Claim
50 words
A process consisting essentially of applying a liquid or solution of organic peroxide to a carbon black and heating the carbon black having applied organic peroxide thereon at a temperature in the range of about 100° to about 300° C. for a period of time of at least 0.1 hours.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |