Patent US4996263A successfully refreshed from Google Patents.
US4996263A
Expired / Lapsed
US
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High modulus rubber composition
Assignee: Goodyear Tire and Rubber Co
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Filing: 1988-10-06
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Granted: 1991-02-26
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Expires: 2008-10-06
Abstract
Abstract It is desirable to increase the modulus of rubbers utilized in a wide variety of applications. This invention discloses a technique for modifying rubbers to improve their modulus without sacrificing other properties. The subject invention more specifically relates to a process for preparing a rubber composition having a high modulus which comprises reacting maleic anhydride with at least one polydiene rubber and at least one nylon.
Inventors
- 👤 James B. Pyke
- 👤 Richard G. Bauer
- 👤 Martin P. Cohen
- 👤 Pawan K. Handa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:53
CPC Classifications
C; C08; C08L; C08L9/00; C08G; C08G81/00; C08G81/02; C08G81/024; C08G81/028
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
65 words
A process for preparing a rubber composition having a high modulus which comprises reacting maleic anhydride with at least one polydiene rubber selected from the group consisting of polybutadiene, styrene-butadiene rubber, synthetic polyisoprene, natural rubber, isoprene-butadiene rubber, isoprene-butadiene-styrene rubber, nitrile rubber, and carboxylated nitrile rubber and at least one nylon wherein an electrocyclic reaction mechanism is utilized in reacting the maleic anhydride with the rubber.
Claim 2
Dependent Claim
65 words
A process for preparing a rubber composition having a high modulus which comprises reacting maleic anhydride with at least one polydiene rubber selected from the group consisting of polybutadiene, styrene-butadiene rubber, synthetic polyisoprene, natural rubber, isoprene-butadiene rubber, isoprene-butadiene-styrene rubber, nitrile rubber, and carboxylated nitrile rubber and at least one nylon wherein an electrocyclic reaction mechanism is utilized in reacting the maleic anhydride with the rubber.
Claim 3
Dependent Claim
27 words
A process as specified in claim 1 wherein said nylon has a melting point which is within the range of about 150° C. to about 255° C.
Claim 4
Dependent Claim
55 words
A process as specified in claim 2 wherein said process is carried out at a temperature which is within the range of about 150° C. to about 300° C.; and wherein from about 0.1 parts per hundred parts of rubber to about 20 parts per hundred parts of rubber of the maleic anhydride is utilized.
Claim 5
Dependent Claim
42 words
A process as specified in claim 3 wherein said nylon is selected from the group consisting of nylon-6,6, nylon-6, nylon-7, nylon-8, nylon-9, nylon-10, nylon-11, nylon-12, and nylon-6,12; and wherein from about 2 phr to about 55 phr of the nylon is utilized.
Claim 6
Dependent Claim
23 words
A process as specified in claim 3 wherein said nylon is selected from the group consisting of nylon-8, nylon-9, nylon-10, nylon-11, and nylon-12.
Claim 7
Dependent Claim
37 words
A process as specified in claim 5 wherein the process is carried out by reacting the nylon with the maleic anhydride to produce a nylon/maleic anhydride adduct and subsequently reacting the nylon/maleic anhydride adduct with the rubber.
Claim 8
Dependent Claim
29 words
A process as specified in claim 6 wherein said process is carried out at a temperature which is within the range of about 165° C. to about 250° C.
Claim 9
Dependent Claim
12 words
A process as specified in claim 6 wherein said nylon is nylon-12.
Claim 10
Dependent Claim
43 words
A process as specified in claim 6 which is carried out in the presence of a free radical trapping antioxidant selected from the group consisting of (1) the reaction product of p-nonyl phenol, formaldehyde and dodecane thiol-1 and (2) 2-(2-hydroxy-3-t-butyl-5-methybenzyl) 4-methyl-6-t-butyl phenyl methacrylate.
Claim 11
Dependent Claim
27 words
A process as specified in claim 9 which is carried out at a temperature which is within the range of about 180° C. to about 200° C.
Claim 12
Dependent Claim
29 words
A process as specified in claim 10 wherein said polydiene rubber is selected from the group consisting of high cis-1,4-polybutadiene, styrene-butadiene rubber, synthetic polyisoprene, natural rubber and isoprene-butadiene rubber.
Claim 13
Dependent Claim
32 words
A process as specified in claim 1 wherein from about 0.5 parts per hundred parts of rubber to about 3 parts per hundred parts of rubber of the maleic anhydride is utilized.
Claim 14
Dependent Claim
31 words
A process as specified in claim 1 wherein from about 20 parts per hundred parts of rubber to about 45 parts per hundred parts of rubber of the nylon is utilized.
Claim 15
Dependent Claim
11 words
The rubber composition made by the process specified in claim 1.
Claim 16
Dependent Claim
80 words
A process for preparing a rubber composition having a high modulus which comprises reacting at least one nylon with maleic anhydride to produce a nylon/maleic anhydride adduct and subsequently reacting the nylon/maleic anhydride adduct with at least one rubber selected from the group consisting of polybutadiene, styrene-butadiene rubber, synthetic polyisoprene, natural rubber, isoprene-butadiene rubber, isoprene-butadiene-styrene rubber, nitrile rubber, and carboxylated nitrile rubber, wherein the nylon/maleic anhydride adduct is reacted with the rubber in the absence of a free radical initiator.
Claim 17
Dependent Claim
80 words
A process for preparing a rubber composition having a high modulus which comprises reacting at least one nylon with maleic anhydride to produce a nylon/maleic anhydride adduct and subsequently reacting the nylon/maleic anhydride adduct with at least one rubber selected from the group consisting of polybutadiene, styrene-butadiene rubber, synthetic polyisoprene, natural rubber, isoprene-butadiene rubber, isoprene-butadiene-styrene rubber, nitrile rubber, and carboxylated nitrile rubber, wherein the nylon/maleic anhydride adduct is reacted with the rubber in the absence of a free radical initiator.
References Cited (Backward Citations)
US4535119A
Cited
JPS6049018A
Cited
US4567238A
Cited
US4708987A
Cited
US4777211A
Cited
JPS6286048A
Cited
JPS6356514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |