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US4164428A
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Plasticized sulfur composition
Assignee: Chevron USA Inc
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Filing: 1978-03-02
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Granted: 1979-08-14
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Expires: 1998-03-02
Abstract
Abstract A plasticized sulfur composition having improved chemical resistance, comprising at least 50% by weight sulfur, a sulfur plasticizer, a mineral suspending agent, and an organosilane stabilizing agent.
Inventors
- 👤 Milutin Simic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:34
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/36; C01; C01B; C01B17/00; C01B17/02; C01B17/0243; C09; C09D; C09D1/00; C09K; C09K17/00; C09K17/40; C09K17/42
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
A plasticized sulfur composition comprising at least 50% by weight sulfur, a sulfur plasticizer, a finely divided particulate mineral suspending agent and an organosilane stabilizing agent having the formula R--Si(OR') 3 wherein R is an organic radical having at least one functional group selected from the group consisting of amino, epoxy, vinyl, methacryloxy and mercapto groups, and wherein R' is a low molecular weight alkyl group.
Claim 2
Dependent Claim
66 words
A plasticized sulfur composition comprising at least 50% by weight sulfur, a sulfur plasticizer, a finely divided particulate mineral suspending agent and an organosilane stabilizing agent having the formula R--Si(OR') 3 wherein R is an organic radical having at least one functional group selected from the group consisting of amino, epoxy, vinyl, methacryloxy and mercapto groups, and wherein R' is a low molecular weight alkyl group.
Claim 3
Dependent Claim
45 words
A composition according to claim 1 comprising at least 50% by weight sulfur, from about 0.5% to about 25% by weight sulfur plasticizer, from about 1% to about 40% by weight suspending agent, and from about 0.01% to about 1% by weight organosilane stabilizing agent.
Claim 4
Dependent Claim
48 words
A composition according to claim 2 comprising from about 60% to about 98% by weight sulfur, from about 0.2% to about 5% by weight sulfur plasticizer, from about 5% to about 30% by weight suspending agent and from about 0.1% to about 0.8% by weight organosilane stabilizing agent.
Claim 5
Dependent Claim
48 words
A composition according to claim 3 comprising from about 70% to about 97% by weight sulfur, from about 1% to about 2% by weight sulfur plasticizer, from about 10% to about 20% by weight suspending agent, and from about 0.2% to about 0.6% by weight organosilane stabilizing agent.
Claim 6
Dependent Claim
17 words
A composition according to claim 1 wherein the organosilane stabilizing agent is selected from gamma-methacryloxypropyltrimethoxysilane and gamma-glycidoxypropyltrimethoxysilane.
Claim 7
Dependent Claim
25 words
A composition according to claim 1 wherein the finely divided particulate suspending agent is selected from the group consisting of talcs, clays, micas, and silicas.
Claim 8
Dependent Claim
13 words
A composition according to claim 6 wherein the suspending agent is a mica.
Claim 9
Dependent Claim
24 words
A composition according to claim 1 wherein the sulfur plasticizer is selected from the group consisting of aliphatic polysulfides, aromatic polysulfides and mixtures thereof.
Claim 10
Dependent Claim
64 words
A plasticized sulfur coating composition comprising about 80% by weight sulfur, about 2% by weight of an aromatic polysulfide formed by reacting 1 mol of phenol with at least 2 mols of sulfur, 0.5% by weight of a linear aliphatic polysulfide having the recurring unit --S.sub.x CH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S.sub.x -- about 18% by weight mica, and about 0.2% by weight gamma-glycidoxypropyltrimethoxysilane.
Claim 11
Dependent Claim
64 words
A plasticized sulfur coating composition comprising about 80% by weight sulfur, about 2% by weight of an aromatic polysulfide formed by reacting 1 mol of phenol with at least 2 mols of sulfur, 0.5% by weight of a linear aliphatic polysulfide having the recurring unit --S.sub.x CH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S.sub.x -- about 18% by weight mica, and about 0.2% by weight gamma-glycidoxypropyltrimethoxysilane.
References Cited (Backward Citations)
US2462146A
Cited
US2756220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-08-13 | 1983-02-12 | 1983-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-13 | 1987-02-12 | 1987-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-13 | 1991-02-12 | 1991-08-14 | $7700.00 | Window Closed / Lapsed |