Patent US4375497A successfully refreshed from Google Patents.
US4375497A
Expired / Lapsed
US
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Free flowing SBR black masterbatch powder
Assignee: Goodyear Tire and Rubber Co
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Filing: 1981-08-27
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Granted: 1983-03-01
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Expires: 2001-08-27
Abstract
Abstract There is disclosed a process for the production of tack-free, pourable, filler containing elastomer powder which comprises (a) dispersing a carbon black filler in water; (b) mixing the thus dispersed carbon black filler with an elastomer latex; (c) coagulating the thus produced mixture of elastomer latex and carbon black with an acid/alum solution; (d) partitioning the thus coagulated suspension with a coating resin; and (e) filtering, washing and drying of the resultant powder, the improvement comprising using as a coating resin a mixture of a styrene/butadiene resin and a styrene/α-methylstyrene or a polystyrene resin wherein the weight ratio of the styrene/butadiene resin to the styrene/α-methylstyrene or polystyrene resin ranges between 4/1 and 1/4, said resins containing a mixture of added surfactants, the first being sodium lauryl sulfate and the second being a nonionic isooctyl phenoxy polyethoxy ethanol which contains 10 moles of ethylene oxide in the polyethoxy portion thereof, said mixture of surfactants being added in an amount at least 4 percent by weight and being in a weight ratio of sodium lauryl sulfate to the nonionic surfactant ranging from 2/1 to 1/2, and wherein the coagulation temperature ranges from 70° to 90° C.
Inventors
- 👤 Paul H. Sandstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:23
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/124; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C08K; C08K9/00; C08K9/08; C08J2321/00; Y; Y10; Y10S; Y10S525/00; Y10S525/902; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
191 words
A process for the production of tack-free, pourable, filler containing elastomer powder which comprises (a) dispersing a carbon black filler in water; (b) mixing the thus dispersed carbon black filler with an elastomer latex; (c) coagulating the thus produced mixture of elastomer latex and carbon black with an acid/alum solution; (d) partitioning the thus coagulated suspension with a coating resin; and (e) filtering, washing and drying of the resultant powder, the improvement comprising using as a coating resin a mixture of a styrene/butadiene resin and a styrene/α-methylstyrene or a polystyrene resin wherein the weight ratio of the styrene/butadiene resin to the styrene/α-methylstyrene or polystyrene resin ranges between 4/1 and 1/4, said resins containing a mixture of added surfactants, the first being sodium lauryl sulfate and the second being a nonionic isooctyl phenoxy polyethoxy ethanol which contains 10 moles of ethylene oxide in the polyethoxy portion thereof, said mixture of surfactants being added in an amount at least 4 percent by weight and being in a weight ratio of sodium lauryl sulfate to the nonionic surfactant ranging from 2/1 to 1/2, and wherein the coagulation temperature ranges from 70° to 90° C.
Claim 2
Dependent Claim
191 words
A process for the production of tack-free, pourable, filler containing elastomer powder which comprises (a) dispersing a carbon black filler in water; (b) mixing the thus dispersed carbon black filler with an elastomer latex; (c) coagulating the thus produced mixture of elastomer latex and carbon black with an acid/alum solution; (d) partitioning the thus coagulated suspension with a coating resin; and (e) filtering, washing and drying of the resultant powder, the improvement comprising using as a coating resin a mixture of a styrene/butadiene resin and a styrene/α-methylstyrene or a polystyrene resin wherein the weight ratio of the styrene/butadiene resin to the styrene/α-methylstyrene or polystyrene resin ranges between 4/1 and 1/4, said resins containing a mixture of added surfactants, the first being sodium lauryl sulfate and the second being a nonionic isooctyl phenoxy polyethoxy ethanol which contains 10 moles of ethylene oxide in the polyethoxy portion thereof, said mixture of surfactants being added in an amount at least 4 percent by weight and being in a weight ratio of sodium lauryl sulfate to the nonionic surfactant ranging from 2/1 to 1/2, and wherein the coagulation temperature ranges from 70° to 90° C.
Claim 3
Dependent Claim
40 words
A process according to claim 1 wherein the carbon black is prepared using a purified free acid pine lignin dispersant in an amount which is 3 to 6 percent by weight concentration based on the weight of the carbon black.
Claim 4
Dependent Claim
38 words
A process according to claim 1 in which the styrene/butadiene resin contains a styrene to butadiene weight ratio ranging from 75/25 to 95/5 and the styrene/α-methylstyrene resin contains a styrene to α-methylstyrene weight ratio of 99/1 to 50/50.
Claim 5
Dependent Claim
38 words
A process according to claim 2 in which the styrene/butadiene resin contains a styrene to butadiene weight ratio changing from 75/25 to 95/5 and the styrene/α-methylstyrene resin contains a styrene to α-methylstyrene weight ratio of 99/1 to 50/50.
Claim 6
Dependent Claim
32 words
A process according to claim 1 wherein the styrene/butadiene resin has a styrene to butadiene weight ratio of 90/10 and the styrene/α-methylstyrene resin has a styrene to α-methylstyrene weight ratio of 75/25.
Claim 7
Dependent Claim
32 words
A process according to claim 2 wherein the styrene/butadiene resin has a styrene to butadiene weight ratio of 90/10 and the styrene-α-methylstyrene resin has a styrene to α-methylstyrene weight ratio of 75/25.
Claim 8
Dependent Claim
26 words
A process according to claim 1 in which the styrene/butadiene resin contains a styrene to butadiene weight ratio of 95/5 and the second resin is polystyrene.
Claim 9
Dependent Claim
25 words
A process according to claim 2 in which the styrene/butadiene resin contains a styrene to butadiene weight of 95/5 and the second resin is polystyrene.
Claim 10
Dependent Claim
21 words
As the composition of tack-free, pourable, filler containing elastomer powder which is prepared in accordance with the process of claim 1.
References Cited (Backward Citations)
US3294733A
Cited
US3380958A
Cited
US3998778A
Cited
US3813259A
Cited
US3920604A
Cited
US3945978A
Cited
US3922240A
Cited
US3929707A
Cited
US4073755A
Cited
US4271213A
Cited
US4138375A
Cited
US4212918A
Cited
US4250082A
Cited
US4213888A
Cited
US4265939A
Cited
US4298654A
Cited
US4333970A
Cited
US4333969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |