US4263078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an article comprising polysulfide rubbers
Assignee: ATK Launch Systems LLC
•
Filing: 1978-06-08
•
Granted: 1981-04-21
•
Expires: 1998-06-08
Abstract
Abstract The use of polysulfide rubbers cured with zinc oxide and tetramethylthiuram disulfide and other sulfur containing cure accelerators for polyisoprene rubbers in hot applied processes and articles formed thereby are disclosed. The compositions are useful as hot applied sealants and in the extrusion of hoses and similar rubber articles.
Inventors
- 👤 Edward G. Millen
- 👤 Frank K. Pypcznski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:51
CPC Classifications
C; C08; C08L; C08L81/00; C08L81/04; C08G; C08G75/00; C08G75/14
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
124 words
A process for the preparation of a formed article of manufacture comprising a cured rubber based on a thiol terminated liquid polysulfide polymer cured with zinc oxide and a sulfur containing compound selected from 2-mercaptobenzothiazol, zinc diloweralkyldithiocarbamate, and alkyl thiuram polysulfides of the formula ##STR5## wherein x is from about 2 to about 6 and R" is alkyl of from 1 to about 10 carbon atoms either straight chain, branched chain or cyclic or R' moieties attached to the same nitrogen atom may be concatenated and taken together with said nitrogen atom to form a heterocyclic ring, which comprises: (a) extruding said cured rubber through a die under heat and pressure; and (b) allowing the extruded rubber of step (a) to cool and solidify.
Claim 2
Dependent Claim
124 words
A process for the preparation of a formed article of manufacture comprising a cured rubber based on a thiol terminated liquid polysulfide polymer cured with zinc oxide and a sulfur containing compound selected from 2-mercaptobenzothiazol, zinc diloweralkyldithiocarbamate, and alkyl thiuram polysulfides of the formula ##STR5## wherein x is from about 2 to about 6 and R" is alkyl of from 1 to about 10 carbon atoms either straight chain, branched chain or cyclic or R' moieties attached to the same nitrogen atom may be concatenated and taken together with said nitrogen atom to form a heterocyclic ring, which comprises: (a) extruding said cured rubber through a die under heat and pressure; and (b) allowing the extruded rubber of step (a) to cool and solidify.
Claim 3
Dependent Claim
79 words
A process for the preparation of an article of manufacture comprising a substrate having a cured rubber based on a thiol terminated liquid polysulfide polymer cured with zinc oxide and a sulfur containing compound as defined in claim 1 on at least one surface thereof, which comprises: (a) extruding said rubber through a die under heat and pressure onto at least one surface of a substrate; and (b) allowing the extruded rubber of step (a) to cool and solidify.
Claim 4
Dependent Claim
52 words
A process as defined in claim 1 wherein the cured rubber additionally contains one or more extrudability improvers selected from copolymers of styrene with alkylenes, organic or inorganic reinforcing fibers, phenolic resins, coumaroneindene resins, antioxidants and heat stabilizers for rubbers, polyalkylene polymers, factice, terpene resins, terpene esters, benzothiazyl disulfide, or diphenyl guanidine.
Claim 5
Dependent Claim
16 words
A process as defined in claim 3 wherein the extrudability improver is a styrene-isoprene-styrene block copolymer.
Claim 6
Dependent Claim
20 words
A process as defined in claim 3 wherein the extrudability improver is a mixture of benzothiazyl disulfide and diphenyl guanidine.
Claim 7
Dependent Claim
53 words
A process as defined in claim 2 wherein the cured rubber additionally contains one or more extrudability improvers selected from copolymers of styrenes with alkylenes, organic or inorganic reinforcing fibers, phenolic resins, coumaroneindene resins, antioxidants and heat stabilizers for rubbers, poly alkylene polymers, factice, terpene resins, terpene esters, benzothiazyl disulfide, or diphenyl guanidine.
Claim 8
Dependent Claim
16 words
A process as defined in claim 6 wherein the extrudability improver is a styrene-isoprene-styrene block copolymer.
Claim 9
Dependent Claim
20 words
A process as defined in claim 6 wherein the extrudability improver is a mixture of benzothiazyl disulfide and diphenyl guanidine.
Claim 10
Dependent Claim
22 words
A process as defined in claims 1, 2, 3, 4, 5, 6, 7 or 8 wherein the sulfur containing compound is 2-mercaptobenzothiazol.
Claim 11
Dependent Claim
23 words
A process as defined in claims 1, 2, 3, 4, 5, 6, 7 or 8 wherein the sulfur containing compound is zinc diloweralkyldithiocarbamate.
Claim 12
Dependent Claim
14 words
A process as defined in claim 10 wherein the zinc diloweralkyldithiocarbamate is zinc dimethyldithiocarbamate.
Claim 13
Dependent Claim
78 words
A process as defined in claims 1, 2, 3, 4, 5, 6, 7 or 8 wherein the sulfur containing compound is a compound of the formula: ##STR6## wherein x is from about 2 to about 6 and R' is alkyl of from 1 to about 10 carbon atoms either straight chain, branched chain or cyclic or R' moieties attached to the same nitrogen atom may be concatenated and taken together with said nitrogen atom form a heterocyclic ring.
Claim 14
Dependent Claim
15 words
A process as defined in claim 12 wherein R' is methyl and x is 2.
Claim 15
Dependent Claim
15 words
A process as defined in claim 12 wherein R' is ethyl and x is 2.
Claim 16
Dependent Claim
28 words
A process as defined in claim 12 wherein the R' pairs bonded to a common nitrogen atom are concatenated to form a pentamethylene moiety and x is 6.
References Cited (Backward Citations)
US2466963A
Cited
US3157564A
Cited
US3349047A
Cited
US3637574A
Cited
US3923754A
Cited
US3923748A
Cited
US3991039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |