US4232137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling an alpha-methylstyrene polymerization mass
Assignee: Phillips Petroleum Co
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Filing: 1978-09-14
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Granted: 1980-11-04
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Expires: 1998-09-14
Abstract
Abstract An alpha-methylstyrene polymerization reaction mass is cooled by including therein a component which is readily vaporizable under the conditions of polymerization thereby to remove undesirable or excess heat, thus controlling the reaction temperature to a desired value. In one embodiment a living polymer is produced followed by addition of a second monomer to the living polymer still in solution followed by polymerization onto the living polymer, forming a living block copolymer which is coupled with a linking agent.
Inventors
- 👤 Howard B. Irvin
- 👤 Ronnie L. Lewis
- 👤 George A. Moczygemba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:34
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/12; C08G; C08G81/00; C08G81/02; C08G81/021; C08G81/022
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
127 words
A method for producing a polymeric mass from an alpha-methylstyrene which comprises preparing a solution of it in an inert diluent, the inert diluent having two components other than said alpha-methyl styrene and being composed of at least one solvent of a character and present in the solution in an amount sufficient to maintain a polymer when produced in solution in the polymeric mass and a liquid component which is readily vaporizable under the desired conditions of polymerization, said component being of a character and being present in an amount such as to remove by vaporization of at least a portion thereof undesirable or excess heat from the reaction mass and then producing said mass under polymerization conditions including the vaporization of said portion of said component.
Claim 2
Independent Claim
127 words
A method for producing a polymeric mass from an alpha-methylstyrene which comprises preparing a solution of it in an inert diluent, the inert diluent having two components other than said alpha-methyl styrene and being composed of at least one solvent of a character and present in the solution in an amount sufficient to maintain a polymer when produced in solution in the polymeric mass and a liquid component which is readily vaporizable under the desired conditions of polymerization, said component being of a character and being present in an amount such as to remove by vaporization of at least a portion thereof undesirable or excess heat from the reaction mass and then producing said mass under polymerization conditions including the vaporization of said portion of said component.
Claim 3
Dependent Claim
39 words
A method according to claim 1 wherein the diluent is at least 1 selected from n-hexane, n-heptane, cyclohexane, cyclopentane, benzene, toluene, xylenes, and 2,2,4-trimethylpentane and said component which is readily vaporizable is selected from propane, ethane, propylene, and ethylene.
Claim 4
Dependent Claim
20 words
A method according to claim 1 wherein the diluent is cyclohexane and the component which is readily vaporizable is propane.
Claim 5
Dependent Claim
55 words
A method according to claim 1 wherein the polymeric mass still containing diluent and some of said component is admixed with a conjugated diene and in presence of a coupling agent a block copolymer is produced, readily vaporizable component is removed from the final reaction mass thus obtained for reuse in producing said polymeric mass.
Claim 6
Dependent Claim
85 words
A method according to claim 1 wherein said alpha-methylstyrene is selected from it and substituted alpha-methylstyrenes having 1 or more substituents on the aromatic ring, said substituents being selected from alkyl, cycloalkyl, aryl radical and combinations thereof, each having 1--8 carbon atoms per substituent and the polymerized mass is admixed with a conjugated diene and in presence of a coupling agent a block copolymer is produced, readily vaporizable component is recovered from the final reaction mass thus obtained for reuse in producing said polymeric mass.
Claim 7
Dependent Claim
18 words
A method according to claim 5 wherein the conjugated diene is one having 4--12 carbon atoms per molecule.
Claim 8
Dependent Claim
20 words
A method according to claim 6 wherein the conjugated diene is selected from 1,3-butadiene, 2,3-dimethyl-1, 3-butadiene, 2-methyl-1,3-pentadiene, 2,3-dimethyl-1,3-pentadiene, and 2-phenyl-1,3-butadiene.
Claim 9
Dependent Claim
86 words
A method according to claim 5 wherein a block copolymer is produced by polymerizing the alpha-methylstyrene in solution and in presence of said component with aid of a monofunctional anionic initiator, into a living polymer in solution, conjugated diene is then added to the solution, the living polymer initiating polymerization of the diene, wherein the living block copolymer is coupled with a reactive multifunctional linking agent, and wherein vaporizable component is recovered from the final reaction mass thus obtained for reuse in producing said polymeric mass.
Claim 10
Dependent Claim
115 words
A method according to claim 1 wherein an alpha-methylstyrene dissolved in a diluent comprising a component which is readily vaporizable under desired conditions of reaction is polymerized with the aid of a catalyst to produce a living polymer, the temperature of the reacting mass being controlled with aid of said vaporizable component, some of it being allowed to vaporize to remove heat from said mass, wherein a conjugated diene is then added to the mass to polymerize the same and a coupling agent is used to couple living block copolymer thus produced to form said block copolymer; and wherein additional component is recovered from the final reaction mass thus obtained for reuse in the method.
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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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |