US3886130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyzed production of heat stable fiber-forming vinyl chloride
Assignee: Czech Academy of Sciences
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Filing: 1972-06-29
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Granted: 1975-05-27
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Expires: 1992-06-29
Abstract
Abstract Method for the polymerization of vinyl chloride which is catalyzed by a lithium complex prepared by reacting alkyllithium with an organocompound of a metal(s) of Group IV or with an alkoxide of a metal of Groups I through III of the Periodic Table of Elements, preferably in the presence of an electron-donor. The polymerization is carried out at a temperature in a range of from about 20* C below zero to about 30* C above zero.
Inventors
- 👤 Drahoslav Lim
- 👤 Miloslav Kolinsky
- 👤 Vaclava Jisova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:11
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
A METHOD FOR PREPARING HEAT STABLE FIBER FORMING VINYL CHLORIDE POLYMERS COMPRISING THE STEPS OF POLYMERIZING MONOMERIC VINYL CHLORIDE AT A TEMPERATURE IN A ANRANGE OF FROM ABOUT -20*C TO ABOUT +30*C IN THE PRESENCE OF A LITHIUM COMPLEX CATALYST PREPARED BY REACTING AN ALKYL LITHIUM COMPOUND, THE ALKYL GROUP OF WHICH CONTAINS FROM 2 TO 16 CARBON ATOMS WITH AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANOMETAL COMPOUNDS OF GROUP IV METALS AND ALKOXIDE METAL COMPOUNDS OF GROUP I THROUGH III METALS OF THE PERIODIC TABLE OF ELEMENTS WHICH EFFECTS A DECREASE OF BASICITY AND METALLATION OF SAID ALKYL LITHIUM COMPOUND.
Claim 2
Independent Claim
105 words
A METHOD FOR PREPARING HEAT STABLE FIBER FORMING VINYL CHLORIDE POLYMERS COMPRISING THE STEPS OF POLYMERIZING MONOMERIC VINYL CHLORIDE AT A TEMPERATURE IN A ANRANGE OF FROM ABOUT -20*C TO ABOUT +30*C IN THE PRESENCE OF A LITHIUM COMPLEX CATALYST PREPARED BY REACTING AN ALKYL LITHIUM COMPOUND, THE ALKYL GROUP OF WHICH CONTAINS FROM 2 TO 16 CARBON ATOMS WITH AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANOMETAL COMPOUNDS OF GROUP IV METALS AND ALKOXIDE METAL COMPOUNDS OF GROUP I THROUGH III METALS OF THE PERIODIC TABLE OF ELEMENTS WHICH EFFECTS A DECREASE OF BASICITY AND METALLATION OF SAID ALKYL LITHIUM COMPOUND.
Claim 3
Dependent Claim
25 words
The method as defined in claim 1 wherein the alkyl lithium is selected from the groups comprising ethyl lithium, butyl lithium and tertiary butyl lithium.
Claim 4
Dependent Claim
19 words
The method as defined in claim 1 wherein the organo metal compounds are compounds of titanium, tin, or lead.
Claim 5
Dependent Claim
15 words
The method as defined in claim 3 wherein the organo metal compound is dicyclopentadienetitanium dichloride.
Claim 6
Dependent Claim
20 words
The method as defined in claim 1 wherein the polymerization is carried out in the presence of an Electron donor.
Claim 7
Dependent Claim
31 words
The method as defined in claim 5 wherein the electron donor is selected from the group consisting of amines, alcohols, ethers, carbonyl compounds, carboxyl compounds including heterocyclic substances and mixtures thereof.
Claim 8
Dependent Claim
13 words
The method as defined in claim 6 wherein the electron donor is diethylether.
Claim 9
Dependent Claim
13 words
The method as defined in claim 6 wherein the electron donor is acetone.
Claim 10
Dependent Claim
14 words
The method as defined in claim 6 wherein the electron donor is ethyl acetate.
Claim 11
Dependent Claim
13 words
The method as defined in claim 6 wherein the electron donor is pyridine.
Claim 12
Dependent Claim
13 words
The method as defined in claim 6 wherein the electron donor is tetrahydrofuran.
References Cited (Backward Citations)
US3422082A
Cited
US3108993A
Cited
US3076794A
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US3162621A
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US3196137A
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US3278508A
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US3573268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |