US4311628A
Expired / Lapsed
US
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Thermoplastic elastomeric blends of olefin rubber and polyolefin resin
Assignee: Advanced Elastomer Systems LP
•
Filing: 1979-10-22
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Granted: 1982-01-19
•
Expires: 1999-10-22
Abstract
Abstract Thermoplastic elastomeric compositions, comprising blends of olefin rubber and polyolefin resin in which the rubber is cured with phenolic curative, exhibit superior properties including improved compression set and oil resistance.
Inventors
- 👤 Sabet Abdou-Sabet
- 👤 Michael A. Fath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:05
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/06; C08K5/00; C08K5/04; C08K5/09; C08L23/10; C08L23/16; C08L23/26; C08L23/32; C08L23/34; C08L61/00; C08L61/04; C08L61/06; C08L91/00; C08L2205/00; C08L2205/03; C08L2207/00; C08L2207/04; C08L23/04; C08L2312/00; C08L2312/04; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 64
Claim 1
Independent Claim
98 words
In an elastoplastic composition comprising a blend of thermoplastic crystalline polyolefin resin and fully cured EPDM rubber in the form of small dispersed particles essentially of a size of about 50 microns number average or below, the improvement comprising a composition in which the rubber is cured with phenolic curative comprising phenolic curing resin and cure activator to the extent that the cured composition contains no more than about three percent by weight of curable rubber extractable in cyclohexane at 23° C. or no more than about five percent by weight of curable rubber extractable in boiling xylene.
Claim 2
Dependent Claim
98 words
In an elastoplastic composition comprising a blend of thermoplastic crystalline polyolefin resin and fully cured EPDM rubber in the form of small dispersed particles essentially of a size of about 50 microns number average or below, the improvement comprising a composition in which the rubber is cured with phenolic curative comprising phenolic curing resin and cure activator to the extent that the cured composition contains no more than about three percent by weight of curable rubber extractable in cyclohexane at 23° C. or no more than about five percent by weight of curable rubber extractable in boiling xylene.
Claim 3
Dependent Claim
35 words
The composition of claim 1 comprising a blend of about 15-75 parts by weight polyolefin resin and about 85-25 parts by weight of cured EPDM rubber per 100 parts total weight of resin and rubber.
Claim 4
Dependent Claim
35 words
The composition of claim 2 comprising a blend of about 25-75 parts by weight polyolefin resin and about 75-25 parts by weight of cured EPDM rubber per 100 parts total weight of resin and rubber.
Claim 5
Dependent Claim
12 words
The composition of claim 3 in which the polyolefin resin is polypropylene.
Claim 6
Dependent Claim
21 words
The composition of claim 4 containing about 30-250 parts by weight of extender oil per 100 parts by weight of rubber.
Claim 7
Dependent Claim
19 words
The composition of claim 5 containing about 2-250 parts by weight carbon black per 100 parts by weight rubber.
Claim 8
Dependent Claim
19 words
The composition of claim 4 in which the phenolic curing resin is non-halogenated dimethylol-p-(C 5 -C 10 alkyl) phenol.
Claim 9
Dependent Claim
22 words
The composition of claim 7 in which the cure activator is selected from the group consisting of metal halide and halogen-donating polymer.
Claim 10
Dependent Claim
13 words
The composition of claim 8 in which the halogen-donating polymer is chlorosulfonated polyethylene.
Claim 11
Dependent Claim
14 words
The composition of claim 9 in which the cure activator system includes zinc oxide.
Claim 12
Dependent Claim
22 words
The composition of claim 4 in which the phenolic curative comprises a brominated phenolic curing resin and a metal oxide cure activator.
Claim 13
Dependent Claim
13 words
The composition of claim 11 in which the metal oxide is zinc oxide.
Claim 14
Dependent Claim
12 words
The composition of claim 3 in which the polyolefin resin is polyethylene.
Claim 15
Dependent Claim
19 words
The composition of claim 4 in which the EPDM rubber is a terpolymer of ethylene, propylene and ethylidene norbornene.
Claim 16
Dependent Claim
30 words
The composition of claim 4 in which the rubber is cured to the extent that no more than about five weight percent of the rubber is extractable in boiling xylene.
Claim 17
Dependent Claim
45 words
The composition of claim 15 in which the rubber is cured to the extent that no more than about three weight percent of the rubber is extractable in boiling xylene and the rubber is of the size of about 5 microns number average or below.
Claim 18
Dependent Claim
30 words
The composition of claim 14 in which the rubber is cured to the extent that no more than about five weight percent of the rubber is extractable in boiling xylene.
Claim 19
Dependent Claim
34 words
The composition of claim 4 in which the rubber is cured to the extent that no more than about three percent of the rubber in the blend is extractable in cyclohexane at 23° C.
Claim 20
Dependent Claim
47 words
The composition of claim 1 prepared by masticating the blend and phenolic curative, in an amount sufficient to cure the rubber, at curing temperature until the rubber is cured to the extent that no more than about five percent of the rubber is extractable in boiling xylene.
Claim 21
Dependent Claim
55 words
The composition of claim 4 comprising a blend of about 30-70 parts by weight polypropylene, about 30-70 parts by weight EPDM rubber, and 5-300 parts by weight extender oil per 100 parts total weight of polypropylene and rubber, and 10-100 parts by weight particulate filler per 100 parts total weight of rubber and extender oil.
Claim 22
Dependent Claim
14 words
The filled composition of claim 20 in which the particulate filler is carbon black.
Claim 23
Dependent Claim
14 words
The filled composition of claim 20 in which the particulate filler is non-black filler.
Claim 24
Dependent Claim
13 words
The filled composition of claim 22 in which the filler is kaolin clay.
Claim 25
Dependent Claim
10 words
The filled composition of claim 23 containing silane coupling agent.
Claim 26
Dependent Claim
14 words
The composition of claim 10 in which the phenolic curing resin is dimethylol-p-octyl phenol.
Claim 27
Dependent Claim
89 words
An elastoplastic composition comprising a blend of thermoplastic crystalline polyolefin resin, in an amount sufficient to impart thermoplasticity to the composition, and cured EPDM rubber in the form of small dispersed particles essentially of a size of about 50 microns number average or below, in an amount sufficient to impart rubber-like elasticity to the composition, in which the rubber is cured with phenolic curative comprising phenolic curing resin and cure activator to the extent that no more than about five percent of curable rubber is extractable in boiling xylene.
Claim 28
Dependent Claim
89 words
An elastoplastic composition comprising a blend of thermoplastic crystalline polyolefin resin, in an amount sufficient to impart thermoplasticity to the composition, and cured EPDM rubber in the form of small dispersed particles essentially of a size of about 50 microns number average or below, in an amount sufficient to impart rubber-like elasticity to the composition, in which the rubber is cured with phenolic curative comprising phenolic curing resin and cure activator to the extent that no more than about five percent of curable rubber is extractable in boiling xylene.
Claim 29
Dependent Claim
34 words
The composition of claim 26 in which the rubber is cured to the extent that no more than about three percent of the rubber in the blend is extractable in cyclohexane at 23° C.
Claim 30
Dependent Claim
36 words
The composition of claim 27 comprising a blend of about 15-75 parts by weight polyolefin resin and about 85-25 parts by weight of cured EPDM rubber per 100 parts total weight of polyolefin resin and rubber.
Claim 31
Dependent Claim
36 words
The composition of claim 28 comprising a blend of about 25-75 parts by weight polyolefin resin and about 75-25 parts by weight of cured EPDM rubber per 100 parts total weight of polyolefin resin and rubber.
Claim 32
Dependent Claim
12 words
The composition of claim 29 in which the polyolefin resin is polypropylene.
Claim 33
Dependent Claim
18 words
The composition of claim 30 in which the rubber is a terpolymer of ethylene, propylene, and ethylidene norbornene.
Claim 34
Dependent Claim
23 words
The composition of claim 26 containing about 30 to 250 parts by weight of extender oil per 100 parts by weight of rubber.
Claim 35
Dependent Claim
17 words
The composition of claim 26 in which the rubber is cured with a brominated phenolic curing resin.
Claim 36
Dependent Claim
22 words
The composition of claim 33 in which the rubber is cured with a brominated phenolic curing resin and zinc oxide cure activator.
Claim 37
Dependent Claim
8 words
The composition of claim 33 containing halogen-donating polymer.
Claim 38
Dependent Claim
19 words
The composition of claim 26 in which the phenolic curing resin is non-halogenated dimethylol-p-(C 5 -C 10 alkyl) phenol.
Claim 39
Dependent Claim
21 words
The composition of claim 36 wherein the cure activator is selected from the group consisting of metal halide and halogen-donating polymer.
Claim 40
Dependent Claim
13 words
The composition of claim 37 in which the halogen-donating polymer is chlorosulfonated polyethylene.
Claim 41
Dependent Claim
14 words
The composition of claim 38 in which the cure activator system includes zinc oxide.
Claim 42
Dependent Claim
61 words
The composition of claim 30 comprising a blend of about 30 to 70 parts by weight polypropylene, about 30 to about 70 parts by weight of EPDM rubber, and 5-300 parts by weight extender oil per 100 parts total weight of polypropylene and rubber, and 10-100 parts by weight particulate filler per 100 parts total weight of rubber and extender oil.
Claim 43
Dependent Claim
14 words
The filled composition of claim 40 in which the particulate filler is carbon black.
Claim 44
Dependent Claim
15 words
The filled composition of claim 40 in which the particulate filler is a non-black filler.
Claim 45
Dependent Claim
13 words
The filled composition of claim 42 in which the filler is kaolin clay.
Claim 46
Dependent Claim
10 words
The filled composition of claim 43 containing silane coupling agent.
Claim 47
Dependent Claim
23 words
The composition of claim 30 in which the cured EPDM rubber is of the size of about 5 microns number average or below.
Claim 48
Dependent Claim
22 words
The composition of claim 40 in which the cured EPDM rubber is the size of about 5 microns number average or below.
Claim 49
Dependent Claim
47 words
The composition of claim 26 prepared by masticating the blend and phenolic curative, in an amount sufficient to cure the rubber, at curing temperature until the rubber is cured to the extent that no more than about five percent of the rubber is extractable in boiling xylene.
Claim 50
Dependent Claim
130 words
A process for preparing elastoplastic compositions which comprises (1) masticating about 15-75 parts by weight of EPDM rubber and 85-25 parts by weight thermoplastic crystalline polyolefin resin per 100 total parts by weight of rubber and polyolefin resin, and phenolic curing resin, in an amount sufficient to cure the rubber, at a temperature sufficient to soften or melt the polyolefin resin; and, for a time, sufficient to obtain a homogeneous mixture in which the rubber is in the form of small dispersed particles essentially of a size of about 50 microns number average or below, (2) adding cure activator, (3) continuing masticating the mixture at curing temperature until the rubber is cured to the extent that no more than about five percent of curable rubber is extractable in boiling xylene.
Claim 51
Dependent Claim
130 words
A process for preparing elastoplastic compositions which comprises (1) masticating about 15-75 parts by weight of EPDM rubber and 85-25 parts by weight thermoplastic crystalline polyolefin resin per 100 total parts by weight of rubber and polyolefin resin, and phenolic curing resin, in an amount sufficient to cure the rubber, at a temperature sufficient to soften or melt the polyolefin resin; and, for a time, sufficient to obtain a homogeneous mixture in which the rubber is in the form of small dispersed particles essentially of a size of about 50 microns number average or below, (2) adding cure activator, (3) continuing masticating the mixture at curing temperature until the rubber is cured to the extent that no more than about five percent of curable rubber is extractable in boiling xylene.
Claim 52
Dependent Claim
16 words
The process of claim 48 in which the phenolic curing agent is brominated phenolic curing resin.
Claim 53
Dependent Claim
13 words
The process of claim 49 in which the cure activator is zinc oxide.
Claim 54
Dependent Claim
19 words
The process of claim 48 in which the phenolic curing resin is non-halogenated dimethylol-p-(C 5 -C 10 alkyl) phenol.
Claim 55
Dependent Claim
16 words
The process of claim 51 in which the cure activator comprises chlorosulfonated polyethylene and zinc oxide.
Claim 56
Dependent Claim
14 words
The process of claim 52 in which the phenolic curing resin is dimethylol-p-octyl phenol.
Claim 57
Dependent Claim
12 words
The process of claim 48 in which the polyolefin resin is polypropylene.
Claim 58
Dependent Claim
75 words
An elastoplastic composition comprising a blend of thermoplastic crystalline polyolefin resin, in an amount sufficient to impart thermoplasticity to the composition, and EPDM rubber, in an amount sufficient to impart rubber-like elasticity to the composition, in which the EPDM rubber is cured with phenolic curative comprising about 5 parts to 20 parts by weight phenolic curing resin and about 0.01 to 10 parts by weight cure activator per 100 parts by weight of EPDM rubber.
Claim 59
Dependent Claim
75 words
An elastoplastic composition comprising a blend of thermoplastic crystalline polyolefin resin, in an amount sufficient to impart thermoplasticity to the composition, and EPDM rubber, in an amount sufficient to impart rubber-like elasticity to the composition, in which the EPDM rubber is cured with phenolic curative comprising about 5 parts to 20 parts by weight phenolic curing resin and about 0.01 to 10 parts by weight cure activator per 100 parts by weight of EPDM rubber.
Claim 60
Dependent Claim
37 words
The composition of claim 55 comprising a blend of about 15-75 parts by weight of polyolefin resin and about 85-25 parts by weight of EPDM rubber per 100 parts total weight of polyolefin resin and EPDM rubber.
Claim 61
Dependent Claim
37 words
The composition of claim 56 comprising a blend of about 25-75 parts by weight of polyolefin and about 75-25 parts by weight of EPDM rubber per 100 total parts by weight of polyolefin resin and EPDM rubber.
Claim 62
Dependent Claim
12 words
The composition of claim 57 in which the polyolefin resin is polypropylene.
Claim 63
Dependent Claim
31 words
The composition of claim 58 in which the phenolic curative comprises about 7 to 14 parts by weight of phenolic curing agent per 100 total parts by weight of EPDM rubber.
Claim 64
Dependent Claim
14 words
The composition of claim 59 in which the phenolic curing resin is dimethylol-p-octyl phenol.
References Cited (Backward Citations)
US3037954A
Cited
US3287440A
Cited
US3862056A
Cited
US3909463A
Cited
US3741924A
Cited
US4059651A
Cited
US3758643A
Cited
US3862106A
Cited
US3806558A
Cited
US3835201A
Cited
US3957919A
Cited
US4130535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |