US4564670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersible sulfur product and its process of manufacture
Assignee: Akzo America Inc
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Filing: 1985-03-28
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Granted: 1986-01-14
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Expires: 2005-03-28
Abstract
Abstract A dispersed sulfur product having good flowability can be formed by dispersing particulate sulfur in a liquid poly(cis-isoprene) dispersion agent (i.e., either made by polymerizing synthetic cis-isoprene or by depolymerizing natural rubber). The sulfur product resulting therefrom has good dispersibility in rubber. The product can be formed without using an aqueous co-precipitation technique by simply mixing the liquid poly-(cis-isoprene) dispersion agent with a major amount of sulfur until the desired product results.
Inventors
- 👤 James E. Kearnan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:01
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08K; C08K3/00; C08K3/02; C08K3/06; C08J2321/00; C08J2409/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
25 words
A flowable, particulate sulfur dispersion consisting essentially of particulate sulfur dispersed in liquid poly(cis-isoprene) dispersion agent in the substantial absence of a latex coagulation agent.
Claim 2
Dependent Claim
25 words
A flowable, particulate sulfur dispersion consisting essentially of particulate sulfur dispersed in liquid poly(cis-isoprene) dispersion agent in the substantial absence of a latex coagulation agent.
Claim 3
Dependent Claim
22 words
A sulfur dispersion as claimed in claim 1 wherein the sulfur is present at from about 40% to about 95%, by weight.
Claim 4
Dependent Claim
23 words
A sulfur dispersion as claimed in claim 1 wherein the liquid poly(cis-isoprene) is present at from about 60% to about 5%, by weight.
Claim 5
Dependent Claim
16 words
A sulfur dispersion as claimed in claim 1 wherein the liquid poly(cis-isoprene) is a synthetic cis-isoprene.
Claim 6
Dependent Claim
16 words
A sulfur dispersion as claimed in claim 1 wherein the liquid poly(cis-isoprene) is depolymerized natural rubber.
Claim 7
Dependent Claim
37 words
A sulfur dispersion as claimed in claim 1 wherein the sulfur is present at from about 40% to about 95%, by weight, and the liquid poly(cis-isoprene) is present at from about 60% to about 5%, by weight.
Claim 8
Dependent Claim
16 words
A sulfur dispersion as claimed in claim 6 wherein the liquid poly(cis-isoprene) is a synthetic cis-isoprene.
Claim 9
Dependent Claim
16 words
A sulfur dispersion as claimed in claim 6 wherein the liquid poly(cis-isoprene) is depolymerized natural rubber.
Claim 10
Dependent Claim
16 words
A sulfur dispersion as claimed in any of claims 1-8 wherein the sulfur is insoluble sulfur.
Claim 11
Dependent Claim
26 words
A sulfur dispersion as claimed in any of claims 1-8 wherein the sulfur is insoluble sulfur having an insoluble sulfur content of at least about 30%.
Claim 12
Dependent Claim
49 words
A process for forming a flowable, particulate sulfur dispersion consisting essentially of particulate sulfur dispersed in liquid poly(cis-isoprene) dispersion agent which comprises mixing the sulfur and liquid poly(cis-isoprene), in the substantial absence of water, until the flowable, particulate sulfur dispersion is obtained without coagulation from an aqueous latex solution.
Claim 13
Dependent Claim
49 words
A process for forming a flowable, particulate sulfur dispersion consisting essentially of particulate sulfur dispersed in liquid poly(cis-isoprene) dispersion agent which comprises mixing the sulfur and liquid poly(cis-isoprene), in the substantial absence of water, until the flowable, particulate sulfur dispersion is obtained without coagulation from an aqueous latex solution.
Claim 14
Dependent Claim
21 words
A process as claimed in claim 11 wherein the sulfur is present at from about 40% to about 95% by weight.
Claim 15
Dependent Claim
25 words
A process for sulfur dispersion as claimed in claim 11 wherein the liquid poly(cis-isoprene) is present at from about 60% to about 5%, by weight.
Claim 16
Dependent Claim
18 words
A process for sulfur dispersion as claimed in claim 11 wherein the liquid poly(cis-isoprene) is a synthetic cis-isoprene.
Claim 17
Dependent Claim
18 words
A process for sulfur dispersion as claimed in claim 11 wherein the liquid poly(cis-isoprene) is depolymerized natural rubber.
Claim 18
Dependent Claim
39 words
A process for sulfur dispersion as claimed in claim 11 wherein the sulfur is present at from about 40% to about 95%, by weight, and the liquid poly(cis-isoprene) is present at from about 60% to about 5%, by weight.
Claim 19
Dependent Claim
18 words
A process for sulfur dispersion as claimed in claim 16 wherein the liquid poly(cis-isoprene) is a synthetic cis-isoprene.
Claim 20
Dependent Claim
18 words
A process for sulfur dispersion as claimed in claim 16 wherein the liquid poly(cis-isoprene) is depolymerized natural rubber.
Claim 21
Dependent Claim
18 words
A process for sulfur dispersion as claimed in any of claims 11-18 wherein the sulfur is insoluble sulfur.
Claim 22
Dependent Claim
28 words
A process for sulfur dispersion as claimed in any of claims 11-18 wherein the sulfur is insoluble sulfur having an insoluble sulfur content of at least about 30%.
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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) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |