US3923764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjuvant for improving the polymerisation of ethylene-hydrocarbons
Assignee: ATO Chimie SA
•
Filing: 1972-12-11
•
Granted: 1975-12-02
•
Expires: 1992-12-11
Abstract
Abstract The invention relates to an adjuvant to a catalyst system for polymerising ethylene, more particularly vinyl, hydrocarbons. The adjuvant is a nitrogenous substance such as an amide, ammonia or an ammonia compound liberating ammonia in the reaction medium; it is added together with sulphur dioxide or an SO2liberating compound to the monomer containing a hydroperoxide and/or organic peracid catalyst. The polymers, which are obtained with an improved conversion rate, have very good characteristics and are suitable, e.g., for the manufacture of rigid sectional members, hot-water piping and various building components.
Inventors
- 👤 Henri Fassy
- 👤 Philippe Lalet
- 👤 Andre Miletto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:04
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
74 words
IN A PROCESS OF POLYMERIZING AN ETHYLENE HYDROCARBON OR VINYL CHLORIDE EMPLOYING A REDOX CATALYST, WHEREIN ONE COMPONENT OF SAID REDOX CATALYST IS A HYDROPEROXIDE, ORGANIC PERACID OR MIXTURE THEREOF AND THE OTHER COMPONENT IS SO2 OR AN SO2 LIBERATING COMPOUND, THE IMPROVEMENT WHICH COMPRISES ADDITIONALLY EMPLOYING AN ADJUVANT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AMIDE, ALKALINE EARTH METAL AMIDE, ALKALI METAL AMIDO-SULFINATE ALKALINE EATH METAL AMIDO-SULFINATE, AMMONIUM SULFITE, AND MIXTURES THEREOF.
Claim 2
Dependent Claim
74 words
IN A PROCESS OF POLYMERIZING AN ETHYLENE HYDROCARBON OR VINYL CHLORIDE EMPLOYING A REDOX CATALYST, WHEREIN ONE COMPONENT OF SAID REDOX CATALYST IS A HYDROPEROXIDE, ORGANIC PERACID OR MIXTURE THEREOF AND THE OTHER COMPONENT IS SO2 OR AN SO2 LIBERATING COMPOUND, THE IMPROVEMENT WHICH COMPRISES ADDITIONALLY EMPLOYING AN ADJUVANT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AMIDE, ALKALINE EARTH METAL AMIDE, ALKALI METAL AMIDO-SULFINATE ALKALINE EATH METAL AMIDO-SULFINATE, AMMONIUM SULFITE, AND MIXTURES THEREOF.
Claim 3
Dependent Claim
51 words
The process of claim 1 wherein the amount of adjuvant is 5 X 10 4 to 5 X 10 3 mols per mol of monomer and 0.5 to 5 mols per mol of SO2, and wherein the amount of total catalyst is 0.01-3 percent based on the weight of the monomer.
Claim 4
Dependent Claim
27 words
The process of claim 2 wherein the amount of adjuvant is 1-3 mols per mol of SO2 and wherein the amount of total catalyst is 0.05-0.5 percent.
Claim 5
Dependent Claim
37 words
The process of claim 1 wherein said monomer is vinyl chloride, wherein the molar ratio of SO2 to hydroperoxide is 0.5-10 and SO2 is not more than 1 percent based on the weight of the vinyl chloride.
Claim 6
Dependent Claim
11 words
The process of claim 4 wherein said molar ratio is 1-3.
Claim 7
Dependent Claim
11 words
The process of claim 4 wherein said adjuvant is sodium amide.
Claim 8
Dependent Claim
52 words
In a process of polymerizing an ethylene hydrocarbon or vinyl chloride employing a redox catalyst, wherein one component of said redox catalyst is a hydroperoxide, organic peracid or mixture thereof, and the other component is SO2 or an SO2 liberating compound, the improvement which comprises additionally employing sodium amide as an adjuvant.
Claim 9
Dependent Claim
52 words
In a process of polymerizing an ethylene hydrocarbon or vinyl chloride employing a redox catalyst, wherein one component of said redox catalyst is a hydroperoxide, organic peracid or mixture thereof, and the other component is SO2 or an SO2 liberating compound, the improvement which comprises additionally employing sodium amide as an adjuvant.
Claim 10
Dependent Claim
69 words
The process of claim 7 wherein said monomer is vinyl chloride, the total amount of catalyst is 0.01-3 percent based on the weight of the monomer, the molar ratio of SO2 to hydroperoxide is 0.5-10, the amount of SO2 is not greater than 1 percent based on the weight of the vinyl chloride monomer, and said adjuvant is used in an amount of 0.5-5 mols per mol of SO2.
Claim 11
Dependent Claim
32 words
The process of claim 8 where in the amount of total catalyst is 0.05-0.5 percent, the molar ratio is 1-3 and the amount of adjuvant is 1-3 mols per mol of SO2.
Claim 12
Dependent Claim
51 words
The process of claim 7 wherein the amount of adjuvant is 5 X 10 4 to 5 X 10 3 mols per mol of monomer and 0.5 to 5 mols per mol of SO2, and wherein the amount of total catalyst is 0.01-3 percent based on the weight of the monomer.
Claim 13
Dependent Claim
27 words
The process of claim 10 wherein the amount of adjuvant is 1-3 mols per mol of SO2 and wherein the amount of total catalyst is 0.05-0.5 percent.
Claim 14
Dependent Claim
14 words
The process of claim 7 wherein the reaction temperature is -70* to +100* C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |