Patent US4631304A successfully refreshed from Google Patents.
US4631304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel carbon black and process for preparing same
Assignee: Phillips Petroleum Co
•
Filing: 1985-03-18
•
Granted: 1986-12-23
•
Expires: 2005-03-18
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 12:21
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: 8
Claim 1
Independent Claim
134 words
A carbon black pellet which has been treated with an organic peroxide by incorporating said organic peroxide into the pelleting liquid used in forming the carbon black pellet 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 and wherein the pelleting liquid comprises water.
Claim 2
Dependent Claim
134 words
A carbon black pellet which has been treated with an organic peroxide by incorporating said organic peroxide into the pelleting liquid used in forming the carbon black pellet 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 and wherein the pelleting liquid comprises water.
Claim 3
Dependent Claim
141 words
A carbon black pellet which has been treated with an organic peroxide by spraying a sollution of said organic peroxide onto the pellets during the passage of the pellets through a drum dryer being operated to remove pelleting liquid from the pellets 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 4
Dependent Claim
141 words
A carbon black pellet which has been treated with an organic peroxide by spraying a sollution of said organic peroxide onto the pellets during the passage of the pellets through a drum dryer being operated to remove pelleting liquid from the pellets 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 5
Dependent Claim
53 words
A carbon black pellet as in claim 2 which has been heated to a temperature in the range of 100° C. to 200° C. during its passage through the drum dryer and was provided with a residence time in the drum dryer in the range of from about 0.1 to about 1 hour.
Claim 6
Dependent Claim
28 words
A rubber composition comprising from about 10 to about 100 parts by weight of carbon black pellet as in claim 5 per 100 parts of weight of rubber.
Claim 7
Dependent Claim
50 words
A rubber composition as in claim 4 wherein the carbon black is impregnated with the organic peroxide and then heated at a temperature in the range of from about 100° to about 200° C. for a period of time in the range of from about 0.1 to about 3 hours.
Claim 8
Dependent Claim
26 words
A rubber composition as in claim 5 wherein the rubber is selected from the group consisting of natural rubber, polyisoprene, polybutadiene, butadiene-styrene copolymer, and mixtures thereof.
References Cited (Backward Citations)
US2717914A
Cited
US2707674A
Cited
GB862018A
Cited
US3023118A
Cited
US3024092A
Cited
US3025259A
Cited
US3250634A
Cited
US3216843A
Cited
US3279935A
Cited
US3329646A
Cited
US3353980A
Cited
US3330799A
Cited
US3717494A
Cited
US3481754A
Cited
US3992218A
Cited
US4075140A
Cited
US4075156A
Cited
US4075160A
Cited
US4138471A
Cited
US4228143A
Cited
US4360627A
Cited
US4282199A
Cited
US4435378A
Cited
US4518434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |