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US4366285A
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Process for the production of an elastomer-filler mixture optionally containing extender oils
Assignee: Huels AG
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Filing: 1981-07-13
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Granted: 1982-12-28
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Expires: 2001-07-13
Abstract
Abstract A process for producing an elastomer-filler mixture optionally containing an extender oil, comprising the combined precipitation of a homogeneous mixture of a synthetic elastomer latex, produced by emulsion polymerization in an anionic emulsifier system, and an aqueous suspension of a silicic acid based filler, using an acid and, optionally, an electrolyte or other flocculant; separation of the precipitated mixture; and drying of the mixture; is improved in that the filler suspension contains 0.1-5% by weight, based on the amount of filler, of a copolymer of acrylamide and dimethylaminoethyl methacrylate.
Inventors
- 👤 Wolfgang Lukaschek
- 👤 Wolfgang Marx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:54
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C08L; C08L21/00; C08L9/00; C08L9/06; C08L9/08; C08J2321/00; C08K; C08K3/00; C08K3/34; C08L33/00; C08L33/24; C08L33/26
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
91 words
In a process for producing an elastomer-filler mixture, optionally containing an extender oil comprising the combined precipitation of a homogeneous mixture of (a) a synthetic elastomer latex, produced by emulsion polymerization in an anionic emulsifier system, and (b) an aqueous suspension of a silicic acid based filler, using an acid and, optionally, an electrolyte or other flocculant; separation of the precipitated mixture; and drying of the mixture; the improvement wherein the filler suspension contains 0.1-5% by weight, based on the amount of filler, of a copolymer of acrylamide and dimethylaminoethyl methacrylate.
Claim 2
Dependent Claim
91 words
In a process for producing an elastomer-filler mixture, optionally containing an extender oil comprising the combined precipitation of a homogeneous mixture of (a) a synthetic elastomer latex, produced by emulsion polymerization in an anionic emulsifier system, and (b) an aqueous suspension of a silicic acid based filler, using an acid and, optionally, an electrolyte or other flocculant; separation of the precipitated mixture; and drying of the mixture; the improvement wherein the filler suspension contains 0.1-5% by weight, based on the amount of filler, of a copolymer of acrylamide and dimethylaminoethyl methacrylate.
Claim 3
Dependent Claim
14 words
A process of claim 1, wherein the copolymer comprises 5-95% by weight of acrylamide.
Claim 4
Dependent Claim
14 words
A process of claim 2, wherein the copolymer comprises 40-80% by weight of acrylamide.
Claim 5
Dependent Claim
21 words
A process of claim 1, wherein the copolymer is added to the filler suspension in the form of a water-in-oil emulsion.
Claim 6
Dependent Claim
14 words
A process of claim 1 wherein the elastomer latex is a styrene butadiene latex.
Claim 7
Dependent Claim
11 words
A process of claim 1 wherein the filler is silicic acid.
Claim 8
Dependent Claim
20 words
A process of claim 1 wherein the filler suspension comprises another filler in addition to the silicic acid based filler.
Claim 9
Dependent Claim
14 words
A process of claim 3, wherein the amount of copolymer is 0.5-2.0 wt %.
Claim 10
Dependent Claim
14 words
A process of claim 1, wherein the elastomer filler mixture comprises an extender oil.
Claim 11
Dependent Claim
78 words
In a process for precipitating an elastomer-filler mixture, optionally containing an extender oil, comprising adding an acid and, optionally, an electrolyte or other flocculant to a homogeneous mixture of (a) a synthetic elastomer latex, produced by emulsion polymerization in an anionic emulsifier system, and (b) an aqueous suspension of a silicic acid based filler, the improvement wherein the filler suspension contains 0.1-5% by weight, based on the amount of filler, of a copolymer of acrylamide and dimethylaminoethyl methacrylate.
Claim 12
Dependent Claim
78 words
In a process for precipitating an elastomer-filler mixture, optionally containing an extender oil, comprising adding an acid and, optionally, an electrolyte or other flocculant to a homogeneous mixture of (a) a synthetic elastomer latex, produced by emulsion polymerization in an anionic emulsifier system, and (b) an aqueous suspension of a silicic acid based filler, the improvement wherein the filler suspension contains 0.1-5% by weight, based on the amount of filler, of a copolymer of acrylamide and dimethylaminoethyl methacrylate.
Claim 13
Dependent Claim
18 words
An elastomer-filler mixture comprising a copolymer of acrylamide and dimethylaminoethyl methacrylate produced by the process of claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |