US4415690A
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Succinic anhydride derivatives as a scorch inhibitor for carboxylated rubbers
Assignee: Goodyear Tire and Rubber Co
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Filing: 1982-05-17
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Granted: 1983-11-15
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Expires: 2002-05-17
Abstract
Abstract Scorch (the premature cross-linking of an elastomer) is a problem that is often encountered in carboxylated rubbers. Succinic anhydride derivatives (alkenyl succinic anhydrides, alkyl succinic anhydrides, and their corresponding dicarboxylic acids) can be used to greatly improve the scorch resistance of carboxylated rubbers. These succinic anhydride derivatives can be distributed throughout a carboxylated rubber before or after coagulation using any procedure that will result in a thorough mixing to form a rubber composition with improved scorch resistance.
Inventors
- 👤 Donald C. Grimm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:07
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/092; C08K5/15; C08K5/151; C08K5/1535; C08K5/1539
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
125 words
An improved scorch resistant carboxylic rubber composition comprising: (a) a carboxylated rubber; and (b) at least one succinic anhydride derivative selected from the group consisting of alkenyl succinic anhydrides having the structural formula: ##STR12## wherein R is an alkenyl moiety containing from 8 to 25 carbon atoms, inclusive; dicarboxylic acids having the structural formula: ##STR13## wherein R is an alkenyl moiety containing from 8 to 25 carbon atoms, inclusive; alkyl succinic anhydrides having the structural formula: ##STR14## wherein Z is an alkyl moiety containing from 8 to 25 carbon atoms, inclusive; and dicarboxylic acids having the structural formula: ##STR15## wherein Z is an alkyl moiety containing from 8 to 25 carbon atoms, inclusive; which is distributed throughout said carboxylated rubber composition as a scorch inhibitor.
Claim 2
Dependent Claim
125 words
An improved scorch resistant carboxylic rubber composition comprising: (a) a carboxylated rubber; and (b) at least one succinic anhydride derivative selected from the group consisting of alkenyl succinic anhydrides having the structural formula: ##STR12## wherein R is an alkenyl moiety containing from 8 to 25 carbon atoms, inclusive; dicarboxylic acids having the structural formula: ##STR13## wherein R is an alkenyl moiety containing from 8 to 25 carbon atoms, inclusive; alkyl succinic anhydrides having the structural formula: ##STR14## wherein Z is an alkyl moiety containing from 8 to 25 carbon atoms, inclusive; and dicarboxylic acids having the structural formula: ##STR15## wherein Z is an alkyl moiety containing from 8 to 25 carbon atoms, inclusive; which is distributed throughout said carboxylated rubber composition as a scorch inhibitor.
Claim 3
Dependent Claim
27 words
An improved scorch resistant carboxylated rubber composition as specified in claim 1, wherein said R is an alkenyl moiety containing from 12 to 17 carbon atoms, inclusive.
Claim 4
Dependent Claim
27 words
An improved scorch resistant carboxylated rubber composition as specified in claim 1, wherein said Z is an alkyl moiety containing from 12 to 17 carbon atoms, inclusive.
Claim 5
Dependent Claim
26 words
An improved scorch resistant carboxylated rubber composition as specified in claim 2, wherein said R has the structural formula: ##STR16## wherein m+n equals 12 to 17.
Claim 6
Dependent Claim
25 words
An improved scorch resistant carboxylated rubber composition as specified in claim 1, further comprising a metal oxide which is distributed throughout said carboxylated rubber composition.
Claim 7
Dependent Claim
36 words
An improved scorch resistant carboxylated rubber composition as specified in claim 5, wherein said metal oxide is a member selected from the group consisting of zinc oxide, magnesium oxide, copper oxide, calcium oxide, and nickel oxide.
Claim 8
Dependent Claim
19 words
An improved scorch resistant carboxylated rubber composition as specified in claim 6, wherein said metal oxide is zinc oxide.
Claim 9
Dependent Claim
67 words
An improved scorch resistant carboxylated rubber composition as specified in claim 1, wherein said carboxylated rubber is a member selected from the group consisting of terpolymers of methacrylic acid, styrene, and butadiene; terpolymers and methacrylic acid, acrylonitrile, and butadiene; terpolymers of acrylic acid, acrylonitrile, and butadiene; terpolymers of methacrylic acid, vinylidene chloride, and butadiene; copolymers of methacrylic acid and butadiene; and copolymers of methacrylic acid and isoprene.
Claim 10
Dependent Claim
25 words
An improved scorch resistant carboxylated rubber composition as specified in claim 8, wherein said carboxylated rubber is a terpolymer of methacrylic acid, acrylonitrile, and butadiene.
Claim 11
Dependent Claim
26 words
An improved scorch resistant carboxylated rubber composition as specified in claim 1, wherein the total concentration of said succinic anhydride derivatives less than about 5 phr.
Claim 12
Dependent Claim
28 words
An improved scorch resistant carboxylated rubber composition as specified in claim 10, wherein the total concentration of said succinic anhydride derivatives is about 0.1 to about 1.5 phr.
Claim 13
Dependent Claim
125 words
A process for improving the scorch resistance of a carboxylated rubber comprising, distributing throughout said carboxylated rubber a chemical agent selected from the group consisting of alkenyl succinic anhydrides having the structural formula: ##STR17## wherein R is an alkenyl moiety containing from 8 to 25 carbon atoms, inclusive; dicarboxylic acids having the structural formula: ##STR18## wherein R is an alkenyl moiety containing from 8 to 25 carbon atoms, inclusive; alkyl succinic anhydrides having the structural formula: ##STR19## wherein Z is an alkyl moiety containing from 8 to 25 carbon atoms, inclusive; and dicarboxylic acids having the structural formula: ##STR20## wherein Z is an alkyl moiety containing from 8 to 25 carbon atoms, inclusive; which is distributed throughout said carboxylated rubber composition as a scorch inhibitor.
Claim 14
Dependent Claim
125 words
A process for improving the scorch resistance of a carboxylated rubber comprising, distributing throughout said carboxylated rubber a chemical agent selected from the group consisting of alkenyl succinic anhydrides having the structural formula: ##STR17## wherein R is an alkenyl moiety containing from 8 to 25 carbon atoms, inclusive; dicarboxylic acids having the structural formula: ##STR18## wherein R is an alkenyl moiety containing from 8 to 25 carbon atoms, inclusive; alkyl succinic anhydrides having the structural formula: ##STR19## wherein Z is an alkyl moiety containing from 8 to 25 carbon atoms, inclusive; and dicarboxylic acids having the structural formula: ##STR20## wherein Z is an alkyl moiety containing from 8 to 25 carbon atoms, inclusive; which is distributed throughout said carboxylated rubber composition as a scorch inhibitor.
Claim 15
Dependent Claim
41 words
A process for improving the scorch resistance of a carboxylated rubber as specified in claim 12, wherein said chemical agent is distributed throughout said carboxylated rubber by mixing said chemical agent into the emulsion of said carboxylated rubber prior to coagulation.
Claim 16
Dependent Claim
40 words
A process for improving the scorch resistance of a carboxylated rubber as specified in claim 12 wherein said agent is distributed throughout said carboxylated rubber which has been dried by mixing it into said carboxylated rubber utilizing a Banbury mixer.
Claim 17
Dependent Claim
31 words
A process for improving the scorch resistance of a carboxylated rubber as specified in claim 12 wherein said R is an alkenyl moiety containing from 12 to 17 carbon atoms, inclusive.
Claim 18
Dependent Claim
31 words
A process for improving the scorch resistance of a carboxylated rubber as specified in claim 12 wherein Z is an alkyl moiety containing from 12 to 17 carbon carbon atoms, inclusive.
Claim 19
Dependent Claim
30 words
A process for improving the scorch resistance of a carboxylated rubber as specified in claim 12 wherein said R has the structural formula: ##STR21## wherein m+n equals 12 to 17.
Claim 20
Dependent Claim
29 words
A process for improving the scorch resistance of a carboxylated rubber as specified in claim 12 further comprising a metal oxide which is distributed throughout said carboxylated rubber composition.
Claim 21
Dependent Claim
40 words
A process for improving the scorch resistance of a carboxylated rubber as specified in claim 18 wherein said metal oxide is a member selected from the group consisting of zinc oxide, magnesium oxide, copper oxide, calcium oxide and nickel oxide.
Claim 22
Dependent Claim
23 words
A process for improving the scorch resistance of a carboxylated rubber as specified in claim 18 wherein said metal oxide is zinc oxide.
Claim 23
Dependent Claim
71 words
A process for improving the scorch resistance of a carboxylated rubber as specified in claim 12 wherein said carboxylated rubber is a member selected from the group consisting of terpolymers of methacrylic acid, styrene, and butadiene; terpolymers of methacrylic acid, acrylonitrile and butadiene; terpolymers of acrylic acid, acrylonitrile, and butadiene; terpolymers of methacrylic acid, vinylidene chloride, and butadiene; copolymers of methacrylic acid and butadiene; and copolymers of methacrylic acid and isoprene.
Claim 24
Dependent Claim
29 words
A process for improving the scorch resistance of a carboxylated rubber as specified in claim 12 wherein said carboxylated rubber is a copolymer of methacrylic acid, acrylonitrile and butadiene.
Claim 25
Dependent Claim
31 words
A process for improving the scorch resistance of a carboxylated rubber as specified in claim 12, wherein the total concentration of said succinic anhydride derivatives is less than about 5 phr.
Claim 26
Dependent Claim
32 words
A process for improving the scorch resistance of a carboxylated rubber as specified in claim 23, wherein the total concentration of said succinic anhydride derivatives is about 0.1 to about 1.5 phr.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |