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US4147677A
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Dry blending of neutralized sulfonated elastomeric powders
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1977-11-29
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Granted: 1979-04-03
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Expires: 1997-11-29
Abstract
Abstract This invention relates to a process for first preparing a free flowing finely divided powder of a neutralized sulfonated elastomer and subsequently and optionally admixing said formed powder with other agents such as fillers and oils thereby providing free flowing powders capable of being subsequently fabricated into tough elastomeric objects. The neutralized sulfonated elastomeric polymer can be converted into a free flowing finely divided powder which does not agglomerate or cold flow under ambient conditions by a variety of processes, preferably by a grinding process conducted at low temperatures. The formed powder of the neutralized sulfonated elastomeric polymer is blended with at least one chemical additive into a homogeneous mixture, wherein the chemical additive is selected from the group including fillers, polyolefinic thermoplastics, non-polar backbone process oils, lubricants or a metallic oxide and mixtures thereof. The homogeneous mixture is formed into a finished elastomeric article by conventional fabrication.
Inventors
- 👤 Robert D. Lundberg
- 👤 Henry S. Makowski
- 👤 Jan Bock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:07
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/26; C08L23/32; Y; Y10; Y10S; Y10S260/00; Y10S260/31
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
135 words
An elastomeric composition comprising a free flowing, finely divided powder of a neutralized, sulfonated EPDM terpolymer, said EPDM terpolymer having a number average molecular weight of about 10,000 to about 200,000; an ethylene content of about 40 to less than 70 wt. %; a sulfonate content of about 10 to about 50 meq. neutralized sulfonate groups per 100 grams of said terpolymer, said neutralized sulfonate groups having a metal counterion selected from the group consisting of antimony, iron, lead and Groups 1-A, 11-A, 1-B, and II-B of the Periodic Table of Elements and mixtures thereof, wherein said free flowing, finely divided powder of said neutralized sulfonated EPDM terpolymer has an average particle diameter ranging from about 0.1 mm to about 4 mm, said powder not agglomerating at ambient temperatures under pressure into a fused mass.
Claim 2
Dependent Claim
135 words
An elastomeric composition comprising a free flowing, finely divided powder of a neutralized, sulfonated EPDM terpolymer, said EPDM terpolymer having a number average molecular weight of about 10,000 to about 200,000; an ethylene content of about 40 to less than 70 wt. %; a sulfonate content of about 10 to about 50 meq. neutralized sulfonate groups per 100 grams of said terpolymer, said neutralized sulfonate groups having a metal counterion selected from the group consisting of antimony, iron, lead and Groups 1-A, 11-A, 1-B, and II-B of the Periodic Table of Elements and mixtures thereof, wherein said free flowing, finely divided powder of said neutralized sulfonated EPDM terpolymer has an average particle diameter ranging from about 0.1 mm to about 4 mm, said powder not agglomerating at ambient temperatures under pressure into a fused mass.
Claim 3
Dependent Claim
36 words
The composition according to claim 1, further including a preferential plasticizer at a concentration level of about 5 to about 50 parts by weight per hundred based on 100 parts of said neutralized, sulfonated elastomeric polymer.
Claim 4
Dependent Claim
35 words
The composition according to claim 1, wherein said neutralized sulfonated elastomeric polymer has a viscosity at 200° C. at 0.73 sec -1 of about 5 × 10 4 to about 1 × 10 7 poises.
Claim 5
Dependent Claim
39 words
The composition according to claim 2, wherein said preferential plasticizer has a melting point of at least 25° C. and is selected from the group consisting of carboxylic acids, and metallic salts of said carboxylic acids, and mixtures thereof.
Claim 6
Dependent Claim
17 words
The composition according to claim 1, wherein said EPDM terpolymer has less than 60 wt. % ethylene.
Claim 7
Dependent Claim
13 words
The composition according to claim 2, wherein said preferential plasticizer is zinc stearate.
Claim 8
Dependent Claim
23 words
The composition according to claim 1, further including at least one additive blended with said finely divided powder thereby forming a homogeneous mixture.
Claim 9
Dependent Claim
28 words
The composition according to claim 7, wherein said additive is selected from the group consisting of fillers, non-polar backbone process oils, polyolefinics, thermoplastics, and lubricants and mixtures thereof.
Claim 10
Dependent Claim
27 words
The composition according to claim 8, wherein said chemical additive or mixtures thereof are incorporated at a concentration level of less than about 500 parts per hundred.
Claim 11
Dependent Claim
38 words
The composition according to claim 8, wherein said polyolefinic thermoplastic is selected from the group consisting of polyethylene having a melt index of about at least 6 and polypropylene having a melt flow of about at least 10.
Claim 12
Dependent Claim
23 words
The composition according to claim 8, wherein said non-polar backbone process oil is selected from the group consisting of paraffinic, naphthenic and aromatics.
Claim 13
Dependent Claim
22 words
The composition according to claim 8, wherein said non-polar backbone process oil is paraffinic having an Mn of at least about 300.
Claim 14
Dependent Claim
35 words
The composition according to claim 8, wherein said lubricant is a crystalline hydrocarbon wax having a melting point of about 135° F. to about 220° F. and an Mn of about 1000 to about 4000.
Claim 15
Dependent Claim
42 words
The composition according to claim 8, wherein said filler having a particle size of about 0.03 to about 15 microns is selected from the group consisting of carbon black aluminum silicate, talc, calcium silicate, calcium carbonate, and magnesium silicate and mixtures thereof.
Claim 16
Dependent Claim
45 words
The composition according to claim 8, wherein said mixture further includes a metallic hydroxide at a concentration level of about less than about 2 parts per hundred, a metal ion of said metallic hydroxide being selected from the group consisting of calcium, magnesium and barium.
Claim 17
Dependent Claim
126 words
A process for preparing an elastomeric powder composition which comprises the step of forming a free flowing finely divided neutralized sulfonated EPDM terpolymer, by cryogenic grinding said EPDM terpolymer having a number average molecular weight of about 10,000 to about 200,000 an ethylene content of about 40 to less than 70 wt. %, a sulfonate content of about 10 to about 60 meq. neutralized sulfonate groups per 100 grams of said terpolymer, said neutralized sulfonate groups having a metal counterion selected from the group consisting of antimony, iron, lead, and Groups 1-A, 11-A, 1-B, and II-B of the Periodic Table of Elements and mixtures thereof, wherein said free flowing, finely divided powder has an average particle diameter ranging from about 0.1 mm to about 4 mm.
Claim 18
Dependent Claim
126 words
A process for preparing an elastomeric powder composition which comprises the step of forming a free flowing finely divided neutralized sulfonated EPDM terpolymer, by cryogenic grinding said EPDM terpolymer having a number average molecular weight of about 10,000 to about 200,000 an ethylene content of about 40 to less than 70 wt. %, a sulfonate content of about 10 to about 60 meq. neutralized sulfonate groups per 100 grams of said terpolymer, said neutralized sulfonate groups having a metal counterion selected from the group consisting of antimony, iron, lead, and Groups 1-A, 11-A, 1-B, and II-B of the Periodic Table of Elements and mixtures thereof, wherein said free flowing, finely divided powder has an average particle diameter ranging from about 0.1 mm to about 4 mm.
Claim 19
Dependent Claim
52 words
A process according to claim 16, further including: (a) blending at least one additive with said powder to form a homogeneous mixture, said mixture having less than about 500 parts per hundred by weight of said additive per hundred parts of said powder; and (b) forming said mixture into an elastomeric article.
Claim 20
Dependent Claim
17 words
A process according to claim 17, wherein said blending is done by a high speed mixing process.
Claim 21
Dependent Claim
16 words
A process according to claim 17, wherein said blending is done by a drum tumbling process.
Claim 22
Dependent Claim
16 words
A process according to claim 17, wherein said forming is done by a rotational casting process.
Claim 23
Dependent Claim
18 words
A process according to claim 17, wherein said forming is done by a coating process onto a substrate.
Claim 24
Dependent Claim
16 words
A process according to claim 17, wherein said forming is done by an injection molding process.
Claim 25
Dependent Claim
15 words
A process according to claim 17, wherein said forming is done by compression molding process.
Claim 26
Dependent Claim
15 words
A process according to claim 17, wherein said forming is done by an extrusion process.
Claim 27
Dependent Claim
32 words
A process according to claim 17, wherein said chemical additive is selected from the group consisting of polyolefinic thermoplastics, non-polar backbone process oils, fillers, lubricants, and a metallic oxide and mixtures thereof.
Claim 28
Dependent Claim
22 words
A process according to claim 22, wherein said non-polar backbone process oil is paraffinic having an Mn of at least about 300.
Claim 29
Dependent Claim
13 words
A process according to claim 22, wherein said metal oxide is zinc oxide.
Claim 30
Dependent Claim
34 words
A process of claim 22, wherein said lubricant is a crystalline hydrocarbon wax having a melting point of about 135° F. to about 220° F. and an Mn of about 1000 to about 4000.
Claim 31
Dependent Claim
42 words
A process according to claim 22, wherein said filler having a particle size of about 0.03 to about 15 microns is selected from the group consisting of carbon black, aluminum silicate, talc, calcium silicate calcium carbonate and magnesium silicate and mixtures thereof.
Claim 32
Dependent Claim
46 words
A process according to claim 22, wherein said mixture further includes a metallic hydroxide at a concentration level of about less than about 2 parts per hundred, a metal ion of said metallic hydroxide being selected from the group consisting essentially of calcium, magnesium and barium.
Claim 33
Dependent Claim
26 words
A process according to claim 22, wherein said chemical additive or mixtures thereof are at a concentration level of less than about 500 parts per hundred.
Claim 34
Dependent Claim
38 words
A process according to claim 22, wherein said polyolefinic thermoplastic is selected from the group consisting of polyethylene having a melt index of about at least 6 and polypropylene having a melt flow of about at least 10.
Claim 35
Dependent Claim
23 words
A process according to claim 22, wherein said non-polar backbone process oil is selected from the group consisting of paraffinic, naphthenic and aromatics.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-02 | 1982-10-02 | 1983-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-02 | 1986-10-02 | 1987-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-02 | 1990-10-02 | 1991-04-03 | $7700.00 | Window Closed / Lapsed |