USRE28475E
Expired / Lapsed
US
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Process for copolymerization of maleic anhydride with 1-olefins
Assignee: —
•
Filing: 1974-03-13
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Granted: 1975-07-08
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Expires: 1994-03-13
Abstract
Abstract Maleic anhydride and polymerizable liquid 1-olefins having from 4 to 14 carbon atoms are copolymerized employing a liquid-liquid dispersion as the reaction mixture by use of excess liquid 1olefin as a diluent and a minor amount of a copolymer of maleic anhydride with an aliphatic 1-olefin having from 14 to 18 carbon atoms as a dispersing agent. Maleic anhydride and a polymerization initiator becomes dispersed in the mixture of olefin and dispersing agent and polymerization takes place when the temperature is raised to about 80* C. with agitation.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:52
CPC Classifications
C; C08; C08F; C08F267/00; C08F267/04; C08F10/00; C08F22/00; C08F22/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
166 words
A DISPERSION PROCESS FOR MANUFACTURING A COPOLYMER OF MALEIC ANHYDRIDE WITH AN ALIPHATIC 1-OLEFIN COMPRISING THE STEPS: A. FORMING A REACTION MIXTURE BY MIXING TOGETHER AT LEAST ONE POLYMERIZABLE LIQUID 1-OLEFIN HAVING FROM 4 TO 14 CARBON ATOMS, A MINOR AMOUNT OF AN EQUIMOLECULAR COPOLYMER OF MALEIC ANHYDRIDE WITH A LINEAR ALIPHATIC 1-OLEFIN HAVING FROM 14 TO 18 CARBON ATOMS AS A DISPERSING AGENT, A POLYMERIZATION INITIATOR AND A QUANTITY OF MALEIC ANHYDRIDE WHICH IS LESS THAN A MOLAR EQUIVALENT OF THE AMOUNT OF 1-OLEFIN PRESENT, B. AGITATING THE REACTION MIXTURE OF STEP (A) AND HEATING TO INCREASE THE TEMPERATURE TO THE POINT AT WHICH THE POLYMERIZATION REACTION IS INITIATED, C. CONTINUING AGITATION OF THE REACTION MIXTURE AT A TEMPERATURE NEAR THE DECOMPOSITION TEMPERATURE OF THE POLYMERIZATION INITIATOR UNTIL A DISPERSION OF SOLID COPOLYMER PARTICLES IN LIQUID 1-OLEFIN IS OBTAINED AS A POLYMERIZATION PRODUCT MIXTURE, AND D. RECOVERING THE SOLID PARTICLES OF PRODUCT FROM THE POLYMERIZATION PRODUCT MIXTURE BY FILTRATION OR EVAPORATION OF THE LIQUID 1-OLEFIN.
Claim 2
Dependent Claim
166 words
A DISPERSION PROCESS FOR MANUFACTURING A COPOLYMER OF MALEIC ANHYDRIDE WITH AN ALIPHATIC 1-OLEFIN COMPRISING THE STEPS: A. FORMING A REACTION MIXTURE BY MIXING TOGETHER AT LEAST ONE POLYMERIZABLE LIQUID 1-OLEFIN HAVING FROM 4 TO 14 CARBON ATOMS, A MINOR AMOUNT OF AN EQUIMOLECULAR COPOLYMER OF MALEIC ANHYDRIDE WITH A LINEAR ALIPHATIC 1-OLEFIN HAVING FROM 14 TO 18 CARBON ATOMS AS A DISPERSING AGENT, A POLYMERIZATION INITIATOR AND A QUANTITY OF MALEIC ANHYDRIDE WHICH IS LESS THAN A MOLAR EQUIVALENT OF THE AMOUNT OF 1-OLEFIN PRESENT, B. AGITATING THE REACTION MIXTURE OF STEP (A) AND HEATING TO INCREASE THE TEMPERATURE TO THE POINT AT WHICH THE POLYMERIZATION REACTION IS INITIATED, C. CONTINUING AGITATION OF THE REACTION MIXTURE AT A TEMPERATURE NEAR THE DECOMPOSITION TEMPERATURE OF THE POLYMERIZATION INITIATOR UNTIL A DISPERSION OF SOLID COPOLYMER PARTICLES IN LIQUID 1-OLEFIN IS OBTAINED AS A POLYMERIZATION PRODUCT MIXTURE, AND D. RECOVERING THE SOLID PARTICLES OF PRODUCT FROM THE POLYMERIZATION PRODUCT MIXTURE BY FILTRATION OR EVAPORATION OF THE LIQUID 1-OLEFIN.
Claim 3
Dependent Claim
161 words
A dispersion process for manufacturing a copolymer of maleic anhydride with 1-hexene consisting essentially of the steps: a. forming a reaction mixture by mixing together 1-hexene, a minor amount, between 1 and 2 weight percent concentration, of an equimolar copolymer of maleic anhydride with a linear aliphatic 1-olefin having from 14 to 18 carbon atoms as a dispersing agent, a polymerization initiator and a quantity of maleic anhydride which is less than a molar equivalent of the amount of 1-hexene present, b. agitating the reaction mixture of step (a) and heating to increase the temperature to the point at which the polymerization reaction is initiated, c. continuing agitation of the reaction mixture at a temperature near the decomposition temperature of the polymerization initiator until a dispersion of solid copolymer particles in liquid 1-hexene is obtained as a polymerization product mixture, and d. recovering the solid particles of product from the polymerization product mixture by filtration or vaporization of the liquid 1-hexene.
Claim 4
Dependent Claim
161 words
A dispersion process for manufacturing a copolymer of maleic anhydride with 1-hexene consisting essentially of the steps: a. forming a reaction mixture by mixing together 1-hexene, a minor amount, between 1 and 2 weight percent concentration, of an equimolar copolymer of maleic anhydride with a linear aliphatic 1-olefin having from 14 to 18 carbon atoms as a dispersing agent, a polymerization initiator and a quantity of maleic anhydride which is less than a molar equivalent of the amount of 1-hexene present, b. agitating the reaction mixture of step (a) and heating to increase the temperature to the point at which the polymerization reaction is initiated, c. continuing agitation of the reaction mixture at a temperature near the decomposition temperature of the polymerization initiator until a dispersion of solid copolymer particles in liquid 1-hexene is obtained as a polymerization product mixture, and d. recovering the solid particles of product from the polymerization product mixture by filtration or vaporization of the liquid 1-hexene.
Claim 5
Dependent Claim
161 words
A dispersion process for manufacturing a copolymer of maleic anhydride with 1-decene consisting essentially of the steps: a. forming a reaction mixture by mixing together 1-decene, a minor amount, between 1 and 2 weight percent concentration, of an equimolecular copolymer of maleic anhydride with a linear aliphatic 1-olefin having from 14 to 18 carbon atoms as a dispersing agent, a polymerization initiator and a quantity of maleic anhydride which is less than a molar equivalent of the amount of 1-decene present, b. agitating the reaction mixture of step (a) and heating to increase the temperature to the point at which the polymerization reaction is initiated, c. continuing agitation of the reaction mixture at a temperature near the decomposition temperature of the polymerization initiator until a dispersion of solid copolymer particles in liquid 1-decene is obtained as a polymerization product mixture, and d. recovering the solid particles of product from the polymerization product mixture by filtration or vaporization of the liquid 1-decene.
Claim 6
Dependent Claim
161 words
A dispersion process for manufacturing a copolymer of maleic anhydride with 1-decene consisting essentially of the steps: a. forming a reaction mixture by mixing together 1-decene, a minor amount, between 1 and 2 weight percent concentration, of an equimolecular copolymer of maleic anhydride with a linear aliphatic 1-olefin having from 14 to 18 carbon atoms as a dispersing agent, a polymerization initiator and a quantity of maleic anhydride which is less than a molar equivalent of the amount of 1-decene present, b. agitating the reaction mixture of step (a) and heating to increase the temperature to the point at which the polymerization reaction is initiated, c. continuing agitation of the reaction mixture at a temperature near the decomposition temperature of the polymerization initiator until a dispersion of solid copolymer particles in liquid 1-decene is obtained as a polymerization product mixture, and d. recovering the solid particles of product from the polymerization product mixture by filtration or vaporization of the liquid 1-decene.
Claim 7
Dependent Claim
146 words
A dispersion process for manufacturing a copolymer of maleic anhydride with an aliphatic 1-olefin comprising the steps: a. forming a reaction mixture by mixing together at least one polymerizable liquid 1-olefin having from 4 to 14 carbon atoms, a minor amount of an equimolecular copolymer of maleic anhydride with a linear aliphatic 1-olefin having from 14 to 18 carbon atoms as a dispersing agent, a polymerization initiator and a quantity of maleic anhydride which is less than a molar equivalent of the amount of 1-olefin present, b. agitating the reaction mixture of step (a) and heating to increase the temperature to the point at which the polymerization reaction is initiated, and c. continuing agitation of the reaction mixture at a temperature near the decomposition temperature of the polymerization initiator until a dispersion of solid copolymer particles in liquid 1-olefin is obtained as a polymerization product mixture.
Claim 8
Dependent Claim
146 words
A dispersion process for manufacturing a copolymer of maleic anhydride with an aliphatic 1-olefin comprising the steps: a. forming a reaction mixture by mixing together at least one polymerizable liquid 1-olefin having from 4 to 14 carbon atoms, a minor amount of an equimolecular copolymer of maleic anhydride with a linear aliphatic 1-olefin having from 14 to 18 carbon atoms as a dispersing agent, a polymerization initiator and a quantity of maleic anhydride which is less than a molar equivalent of the amount of 1-olefin present, b. agitating the reaction mixture of step (a) and heating to increase the temperature to the point at which the polymerization reaction is initiated, and c. continuing agitation of the reaction mixture at a temperature near the decomposition temperature of the polymerization initiator until a dispersion of solid copolymer particles in liquid 1-olefin is obtained as a polymerization product mixture.
Claim 9
Dependent Claim
141 words
A dispersion process for manufacturing a copolymer of maleic anhydride with 1-hexane consisting essentially of the steps: a. forming a reaction mixture by mixing together 1-hexane, a minor amount, between 1 and 2 weight percent concentration, of an equimolecular copolymer of maleic anhydride with a linear aliphatic 1-olefin having from 14 to 18 carbon atoms as a dispersing agent, a polymerization initiator and a Quantity of maleic anhydride which is less than a molar equivalent of the amount of 1-hexane present, b. agitating the reaction mixture of step (a) and heating to increase the temperature to the point at which the polymerization reaction is initiated, and c. continuing agitation of the reaction mixture at a temperature near the decomposition temperature of the polymerization initiator until a dispersion of solid copolymer particles in liquid 1-hexane is obtained as a polymerization product mixture.
Claim 10
Dependent Claim
141 words
A dispersion process for manufacturing a copolymer of maleic anhydride with 1-hexane consisting essentially of the steps: a. forming a reaction mixture by mixing together 1-hexane, a minor amount, between 1 and 2 weight percent concentration, of an equimolecular copolymer of maleic anhydride with a linear aliphatic 1-olefin having from 14 to 18 carbon atoms as a dispersing agent, a polymerization initiator and a Quantity of maleic anhydride which is less than a molar equivalent of the amount of 1-hexane present, b. agitating the reaction mixture of step (a) and heating to increase the temperature to the point at which the polymerization reaction is initiated, and c. continuing agitation of the reaction mixture at a temperature near the decomposition temperature of the polymerization initiator until a dispersion of solid copolymer particles in liquid 1-hexane is obtained as a polymerization product mixture.
Claim 11
Dependent Claim
141 words
A dispersion process for manufacturing a copolymer of maleic anhydride with 1-decane consisting essentially of the steps: a. forming a reaction mixture by mixing together 1-decane, a minor amount, between 1 and 2 weight percent concentration, of an equimolecular copolymer of maleic anhydride with a linear aliphatic 1-olefin having from 14 to 18 carbon atoms as a dispersing agent, a polymerization initiator and a quantity of maleic anhydride which is less than a molar equivalent of the amount of 1-decene present, b. agitating the reaction mixture of step (a) and heating to increase the temperature to the point at which the polymerization reaction is initiated, and c. continuing agitation of the reaction mixture at a temperature near the decomposition temperature of the polymerization initiator until a dispersion of solid copolymer particles in liquid 1-decene is obtained as a polymerization product mixture.
Claim 12
Dependent Claim
141 words
A dispersion process for manufacturing a copolymer of maleic anhydride with 1-decane consisting essentially of the steps: a. forming a reaction mixture by mixing together 1-decane, a minor amount, between 1 and 2 weight percent concentration, of an equimolecular copolymer of maleic anhydride with a linear aliphatic 1-olefin having from 14 to 18 carbon atoms as a dispersing agent, a polymerization initiator and a quantity of maleic anhydride which is less than a molar equivalent of the amount of 1-decene present, b. agitating the reaction mixture of step (a) and heating to increase the temperature to the point at which the polymerization reaction is initiated, and c. continuing agitation of the reaction mixture at a temperature near the decomposition temperature of the polymerization initiator until a dispersion of solid copolymer particles in liquid 1-decene is obtained as a polymerization product mixture.
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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |