US4607078A
Expired / Lapsed
US
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Blends of organic polymers and organic terminated polysulfide polymers
Assignee: Dow Chemical Co
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Filing: 1984-12-13
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Granted: 1986-08-19
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Expires: 2004-12-13
Abstract
Abstract Blends of organic-terminated polysulfide elastomers and organic polymers are disclosed. The organic polymer may be a saturated organic elastomer, an ethylenically unsaturated organic elastomer, a non-elastomeric polymer, or any combination blend of the three. Said blends exhibit unexpectedly good tensile properties and resilience and are useful for forming gaskets, membranes, sealants, adhesives, hoses, tubing and similar articles.
Inventors
- 👤 Thomas E. Dergazarian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:41
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/14; C08L; C08L81/00; C08L81/04
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
169 words
A polymer blend comprising a blend of a curable or noncurable organic-terminated polysulfide polymer and an organic polymer which is not an organic-terminated polysulfide, wherein said polysulfide polymer is as represented by the general structure ##STR3## wherein n is a number from about 2 to about 8, l is zero or a positive integer, m is a positive integer, each R is independently an unsubstituted or inertly substituted organic polyradical with the radicals residing in carbon atoms, p is an integer which is the difference between the number of radicals on R and 2, and each Z is independently chosen from the class consisting of (vinylaryl)alkyl and other inertly substituted noncrosslinking monoradicals, and wherein said polysulfide polymer comprises from about 1 to about 99 percent by weight of the combined weight of the polysulfide polymer and the organic polymer and wherein the proportions of the polysulfide elastomer and the organic polymer are such that the blend is compatible as evidenced by a lack of phase separation in the blend.
Claim 2
Dependent Claim
169 words
A polymer blend comprising a blend of a curable or noncurable organic-terminated polysulfide polymer and an organic polymer which is not an organic-terminated polysulfide, wherein said polysulfide polymer is as represented by the general structure ##STR3## wherein n is a number from about 2 to about 8, l is zero or a positive integer, m is a positive integer, each R is independently an unsubstituted or inertly substituted organic polyradical with the radicals residing in carbon atoms, p is an integer which is the difference between the number of radicals on R and 2, and each Z is independently chosen from the class consisting of (vinylaryl)alkyl and other inertly substituted noncrosslinking monoradicals, and wherein said polysulfide polymer comprises from about 1 to about 99 percent by weight of the combined weight of the polysulfide polymer and the organic polymer and wherein the proportions of the polysulfide elastomer and the organic polymer are such that the blend is compatible as evidenced by a lack of phase separation in the blend.
Claim 3
Dependent Claim
32 words
The blend of claim 1 wherein said polysulfide polymer is a curable elastomer wherein a sufficient portion of the terminal groups of said copolymer are (vinylaryl)alkyl so that said polymer is curable.
Claim 4
Dependent Claim
34 words
The blend of claim 1 wherein said polysulfide polymer is a noncurable elastomer wherein the proportion of terminal groups which are (vinylaryl)alkyl is less than that amount which enables the polymer to significantly cure.
Claim 5
Dependent Claim
33 words
The blend of claim 2 wherein said organic polymer is an ethylenically unsaturated organic elastomer which contains at least about one carbon carbon double bond per 50 repeating units of said organic polymer.
Claim 6
Dependent Claim
19 words
The blend of claim 4 wherein said unsaturated organic elastomer is a homopolymer or copolymer of a conjugated diene.
Claim 7
Dependent Claim
16 words
The blend of claim 5 wherein said conjugated diene is butadiene, isoprene, or halogenated butyl rubbers.
Claim 8
Dependent Claim
20 words
The blend of claim 4 wherein the unsaturated organic elastomer is a block or graft copolymer of a conjugated diene.
Claim 9
Dependent Claim
23 words
The blend of claim 7 wherein the block or graft copolymer is a block or graft copolymer of styrene and butadiene or isoprene.
Claim 10
Dependent Claim
21 words
The blend of claim 4 wherein the unsaturated organic elastomer is a polymer of a bicyclic diene with ethylene and/or propylene.
Claim 11
Dependent Claim
13 words
The blend of claim 4 wherein the unsaturated organic elastomer is a polypenteneamer.
Claim 12
Dependent Claim
33 words
The blend of claim 3 wherein said organic polymer is an ethylenically unsaturated organic elastomer which contains at least about one carbon carbon double bond per 50 repeating units of said organic polymer.
Claim 13
Dependent Claim
19 words
The blend of claim 11 wherein said unsaturated organic elastomer is a homopolymer or interpolymer of a conjugated diene.
Claim 14
Dependent Claim
16 words
The blend of claim 12 wherein said conjugated diene is butadiene, isoprene, or halogenated butyl rubbers.
Claim 15
Dependent Claim
20 words
The blend of claim 11 wherein the unsaturated organic elastomer is a block or graft copolymer of a conjugated diene.
Claim 16
Dependent Claim
23 words
The blend of claim 14 wherein the block or grafted copolymer is a block or graft copolymer of styrene and butadiene or isoprene.
Claim 17
Dependent Claim
21 words
The blend of claim 11 wherein the unsaturated organic elastomer is a polymer of a bicyclic diene and ethylene and/or propylene.
Claim 18
Dependent Claim
13 words
The blend of claim 11 wherein the unsaturated organic elastomer is a polypenteneamer.
Claim 19
Dependent Claim
14 words
The blend of claim 2 wherein said organic polymer is a saturated organic elastomer.
Claim 20
Dependent Claim
17 words
The blend of claim 18 wherein said saturated organic elastomer is a saturated chain of a polymethylene.
Claim 21
Dependent Claim
18 words
The blend of claim 19 wherein said saturated polymethylene chain is a polymer of chlorinated polyethylene or polyisobutylene.
Claim 22
Dependent Claim
14 words
The blend of claim 3 wherein said organic polymer is a saturated organic elastomer.
Claim 23
Dependent Claim
17 words
The blend of claim 21 wherein said saturated organic elastomer is a saturated chain of a polymethylene.
Claim 24
Dependent Claim
18 words
The blend of claim 22 wherein said saturated polymethylene chain is a polymer of chlorinated polyethylene or polyisobutylene.
Claim 25
Dependent Claim
18 words
The blend of claim 2 wherein said organic polymer is a mixture of unsaturated and saturated organic elastomers.
Claim 26
Dependent Claim
18 words
The blend of claim 3 wherein said organic polymer is a mixture of unsaturated and saturated organic elastomers.
Claim 27
Dependent Claim
13 words
The blend of claim 2 wherein said organic polymer is a non-elastomeric polymer.
Claim 28
Dependent Claim
24 words
The blend of claim 26 wherein said non-elastomeric polymer is polystyrene, low density polyethylene, high density polyethylene, linear low density polyethylene, or polychloromethyl oxirane.
Claim 29
Dependent Claim
36 words
The blend of claim 26 wherein said non-elastomeric polymer is a copolymer of: an alkyl acrylate and acrylonitrile; ethylene and vinyl acetate; ethylene and propylene; ethylene oxide and chloromethyl oxirane; and vinyl chloride and vinylidene chloride.
Claim 30
Dependent Claim
13 words
The blend of claim 3 wherein said organic polymer is a non-elastomeric polymer.
Claim 31
Dependent Claim
24 words
The blend of claim 29 wherein said non-elastomeric polymer is polystyrene, low density polyethylene, high density polyethylene, linear low density polyethylene, or polychloromethyl oxirane.
Claim 32
Dependent Claim
36 words
The blend of claim 29 wherein said non-elastomeric polymer is a copolymer of: an alkyl acrylate and acrylonitrile; ethylene and vinyl acetate; ethylene and propylene; ethylene oxide and chloromethyl oxirane; and vinyl chloride and vinylidene chloride.
Claim 33
Dependent Claim
12 words
The blend of claim 1 further comprising an inorganic filler or pigment.
Claim 34
Dependent Claim
21 words
The blend of claim 1 which is shaped and formed into a gasket, membrane, hose, tube or other article of manufacture.
Claim 35
Dependent Claim
26 words
The blend of claim 1 wherein the ratio of said polysulfide elastomer and said organic polymer are suitable for use in a sealant or adhesive composition.
References Cited (Backward Citations)
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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |