US4092470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable, pumpable, aqueous suspensions of organic peroxides
Assignee: Akzona Inc
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Filing: 1977-02-28
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Granted: 1978-05-30
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Expires: 1997-02-28
Abstract
Abstract Stable, pumpable, highly concentrated aqueous suspensions of organic peroxides containing (a) nonionic emulsifiers having a maximum HLB value of 12.5 and (b) nonionic emulsifiers having a minimum HLB value of 12.5 or anionic emulsifiers.
Inventors
- 👤 Hendrik Harm Jannes Oosterwijk
- 👤 Reinder Torenbeek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:49
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28; C08F4/32; C08F2/00; C08F2/12; C08F2/16; C08F2/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
In a process for aqueous suspension polymerization of vinyl halide alone or in combination with a compound containing a terminal CH 2 ═CH< group copolymerizable with said vinyl halide, or an acrylate, the improvement comprising reacting said monomers in the presence of a pumpable, stable, aqueous suspension which comprises at least about 20 weight % of an organic peroxide which is solid at about 20° C, at least about 0.2 weight % of a nonionic emulsifier having a maximum HLB-value of 12.5 and an emulsifier selected from the group consisting of nonionic emulsifiers having a minimum HLB-value of 12.5, and anionic emulsifiers, said nonionic emulsifier of minimum HLB-value of 12.5 percent present in an amount of at least about 0.2 weight %, and said anionic emulsifier present in an amount of at least about 0.01 weight %.
Claim 2
Dependent Claim
137 words
In a process for aqueous suspension polymerization of vinyl halide alone or in combination with a compound containing a terminal CH 2 ═CH< group copolymerizable with said vinyl halide, or an acrylate, the improvement comprising reacting said monomers in the presence of a pumpable, stable, aqueous suspension which comprises at least about 20 weight % of an organic peroxide which is solid at about 20° C, at least about 0.2 weight % of a nonionic emulsifier having a maximum HLB-value of 12.5 and an emulsifier selected from the group consisting of nonionic emulsifiers having a minimum HLB-value of 12.5, and anionic emulsifiers, said nonionic emulsifier of minimum HLB-value of 12.5 percent present in an amount of at least about 0.2 weight %, and said anionic emulsifier present in an amount of at least about 0.01 weight %.
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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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |