US4575563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid mixtures of trialkylphosphine oxides
Assignee: FMC Corp
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Filing: 1984-02-01
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Granted: 1986-03-11
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Expires: 2004-02-01
Abstract
Abstract Liquid mixtures of trialkylphosphine oxides, useful as antistats in thermoplastic polymers, are obtained by alkylating excess phosphine with a mixture of higher α-olefins to give a mixture of higher alkylated phosphines and unreacted phosphine and alkylating that mixture with a lower α-olefin. This method provides a larger percentage of higher alkyl groups and a lower percentage of lower alkyl groups compared to alkylating the phosphine with all of the mixed α-olefins in a single reaction. The shift in higher alkyl groups decreases the volatility of the trialkylphosphine mixture and is an advantage when preparing plastic compositions at higher formulation temperatures.
Inventors
- 👤 Louis T. Gunkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:21
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5397; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/5004; C07F9/53; C07F9/5304; Y; Y10; Y10S; Y10S524/00; Y10S524/91; Y10S524/912
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 words
In a process of producing liquid mixtures of trialkylphosphine oxides by alkylating phosphine with a mixture of α-olefins in the presence of a free radical source and oxidizing the resulting trialkylphosphine mixture; the improvement of decreasing the volatility of the trialkylphosphine oxide mixture by increasing therein the ratio of higher trialkyl groups to lower trialkyl groups and oxidizing the trialkylphosphine mixture, comprising: a. forming an initial reaction mixture of alkylated phosphines containing the higher alkyl groups and unreacted phosphine by alkylating excess phosphine with a mixture of the corresponding higher α-olefins; b. forming a final reaction mixture of trialkylphosphines by alkylating the initial reaction mixture with a lower α-olefin, and c. oxidizing the reaction mixture of step b. to the corresponding mixture of trialkylphosphine oxides.
Claim 2
Dependent Claim
125 words
In a process of producing liquid mixtures of trialkylphosphine oxides by alkylating phosphine with a mixture of α-olefins in the presence of a free radical source and oxidizing the resulting trialkylphosphine mixture; the improvement of decreasing the volatility of the trialkylphosphine oxide mixture by increasing therein the ratio of higher trialkyl groups to lower trialkyl groups and oxidizing the trialkylphosphine mixture, comprising: a. forming an initial reaction mixture of alkylated phosphines containing the higher alkyl groups and unreacted phosphine by alkylating excess phosphine with a mixture of the corresponding higher α-olefins; b. forming a final reaction mixture of trialkylphosphines by alkylating the initial reaction mixture with a lower α-olefin, and c. oxidizing the reaction mixture of step b. to the corresponding mixture of trialkylphosphine oxides.
Claim 3
Dependent Claim
16 words
The process according to claim 1 wherein the trialkyl groups are derived from three different α-olefins.
Claim 4
Dependent Claim
20 words
The process according to claim 2 wherein the α-olefins are selected from the class consisting of 1-hexene, 1-octene and 1-decene.
Claim 5
Dependent Claim
8 words
The product of the process of claim 1.
Claim 6
Dependent Claim
8 words
The product of the process of claim 2.
Claim 7
Dependent Claim
8 words
The product of the process of claim 3.
References Cited (Backward Citations)
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US3709852A
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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) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |