EP0328975A2
Expired / Lapsed
EP
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Process for producing styrene-based polymers and apparatus for producing said polymers
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1989-02-04
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Granted: —
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Expires: 2009-02-04
Abstract
Abstract A process for producing styrene-based polymers, which comprises polymerization styrene or styrene derivatives at a temperature of not higher than 110°C while applying sufficient shearing force to maintain a polydispersive state, so as to make a substantially solid-state polydispersoid of the product and reaction apparatus suitable fcr performing said process. According to the process and apparatus, when polymerizing styrene or styrene derivatives, styrene-based polymers having mainly syndiotactic configuration with uniform particle size can be obtained efficiently without adhesion of scale to the reaction tank or agitating blades, and moreover, it is possible to control the particle size of polymers, and post-treatment and other treatments becomes easier.
Inventors
- 👤 Daigo Shirota
- 👤 Kazutoshi Ishikawa
- 👤 Koji Yamamoto
- 👤 Hideki Imabayashi
- 👤 Takashi Izumi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 07:33
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/20; B01F; B01F27/00; B01F27/05; B01F27/09; B01F27/091; C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
70 words
In a process for producing styrene-based polymers having mainly syndiotactic configuration, of the type which comprises polymerizing a reaction mixture of styrene monomer or styrene derivative monomer the improvement comprising polymerizing the mixture at a temperature of up to 150°C while adding a sufficient shearing force to the reaction mixture to keep the reaction mixture in a polydispersive state so as to make a substantially solid-state polydispersoid of the polymer.
Claim 2
Dependent Claim
70 words
In a process for producing styrene-based polymers having mainly syndiotactic configuration, of the type which comprises polymerizing a reaction mixture of styrene monomer or styrene derivative monomer the improvement comprising polymerizing the mixture at a temperature of up to 150°C while adding a sufficient shearing force to the reaction mixture to keep the reaction mixture in a polydispersive state so as to make a substantially solid-state polydispersoid of the polymer.
Claim 3
Dependent Claim
13 words
The process of Claim 1, wherein the polymerization temperature is up to 120°C.
Claim 4
Dependent Claim
20 words
The process of Claim 1, wherein a shearing force of at least 0.005 kilowatt per liter of monomer is applied.
Claim 5
Dependent Claim
18 words
The process of Claim 3, wherein the shearing force is 0.01 to 1 kilowatt per liter of monomer.
Claim 6
Dependent Claim
13 words
The process of Claim 3, wherein the polymerization temperature is up to 120°C.
Claim 7
Dependent Claim
18 words
The process of Claim 5, wherein the shearing force is 0.01 to 1 kilowatt per liter of monomer.
Claim 8
Dependent Claim
49 words
The process for producing styrene-based polymers according to Claim 1, wherein a reaction apparatus is used for said shearing force, provided with agitating mechanism having agitating blades comprising: (a) double helical ribbon blades, b) planetary-rotating blades, (c) rotary blades on one axis, or (d) rotary blades on two axis.
Claim 9
Dependent Claim
97 words
The process for producing styrene-based polymers according to Claim 1 comprising applying said shearing force by agitating the mixture in a cylindrical reactor provided with two or more round rod paddles set in the higher part of said reactor, two or more tilt flat-paddles fixed of the lower part in said reactor, and scrapers attached to the paddles positioned higher than 1/4 of axial length of said reactor from its bottom, with their ends spaced by not more than 10 mm from the inner wall of said reactor, said scraper being set in shifted phases of rotation.
Claim 10
Dependent Claim
74 words
The process for producing styrene-based polymers according to Claim 1 comprising applying said shearing force by agitating the mixture in a cylindrical reactor provided with agitating blades having helical blades and scrapers attached to the ends of said helical blades positioned higher than 1/4 of the axial length of the reactor from its bottom, the ends of said scrapers being spaced by not more than 10 mm from the inner wall of the reactor.
Claim 11
Dependent Claim
63 words
The process for producing styrene-based polymers according to Claim 1 comprising applying the shearing force by agitating the mixture in a cylindrical reactor provided with lower agitating-blades consisting of paddle blades or anchor blades in the lower part of the reactor, and at least two agitating rods planted in vertical direction at different distances from the rotary axis above the said lower agitating-blades.
Claim 12
Independent Claim
117 words
An apparatus for producing styrene-based polymers having mainly syndiotactic configuration, comprising a cylindrical reactor having upper and bottom parts and a vertical axis; agitating blades rotatably fitted in said reactor, having two or more flat paddles fixed with their longer faces in vertical direction or flat paddles fixed with certain angles to the vertical line; and scrapers attached on the ends of said paddles positioned higher than 1/4 of a length along the axis of the reactor from the bottom, with the ends of said scrapers spaced by not more than 10 mm from the inner wall of the reactor, said scrapers being set in shifted phases of rotation with respect to each other in adjacent relation.
Claim 13
Independent Claim
117 words
An apparatus for producing styrene-based polymers having mainly syndiotactic configuration, comprising a cylindrical reactor having upper and bottom parts and a vertical axis; agitating blades rotatably fitted in said reactor, having two or more flat paddles fixed with their longer faces in vertical direction or flat paddles fixed with certain angles to the vertical line; and scrapers attached on the ends of said paddles positioned higher than 1/4 of a length along the axis of the reactor from the bottom, with the ends of said scrapers spaced by not more than 10 mm from the inner wall of the reactor, said scrapers being set in shifted phases of rotation with respect to each other in adjacent relation.
Claim 14
Independent Claim
116 words
An apparatus for producing styrene-based polymers having mainly syndiotactic configuration, comprising a cylindrical reactor having upper and bottom parts and a vertical axis; agitating blades rotatably fitted having two or more round paddles fixed in the upper part of said reactor, and two or more flat paddles fixed with certain angles to the vertical axis, placed in the lower part of said reactor; and round rod scrapers attached on the ends of said paddles positioned higher than 1/4 of the axial length of said reactor from its bottom; said scrapers being set with their ends spaced from the inner wall of the reactor by 10 mm, and in shifted phase of rotation with vertically adjacent scrapers.
Claim 15
Independent Claim
116 words
An apparatus for producing styrene-based polymers having mainly syndiotactic configuration, comprising a cylindrical reactor having upper and bottom parts and a vertical axis; agitating blades rotatably fitted having two or more round paddles fixed in the upper part of said reactor, and two or more flat paddles fixed with certain angles to the vertical axis, placed in the lower part of said reactor; and round rod scrapers attached on the ends of said paddles positioned higher than 1/4 of the axial length of said reactor from its bottom; said scrapers being set with their ends spaced from the inner wall of the reactor by 10 mm, and in shifted phase of rotation with vertically adjacent scrapers.
Claim 16
Independent Claim
77 words
An apparatus for producing styrene-based polymer, having mainly syndiotactic configuration, comprising a cylindrical reactor having upper and bottom parts and a vertical axis; agitating blades rotatably fitted along said axis and having helical blades; and scrapers on the ends of said helical blades located higher than 1/4 of the axial length of said reactor from its bottom, said scraper being spaced with their ends by not more than 10 mm from the inner wall of the reactor.
Claim 17
Independent Claim
77 words
An apparatus for producing styrene-based polymer, having mainly syndiotactic configuration, comprising a cylindrical reactor having upper and bottom parts and a vertical axis; agitating blades rotatably fitted along said axis and having helical blades; and scrapers on the ends of said helical blades located higher than 1/4 of the axial length of said reactor from its bottom, said scraper being spaced with their ends by not more than 10 mm from the inner wall of the reactor.
Claim 18
Independent Claim
67 words
An apparatus for producing styrene-based polymer having mainly syndiotactic configuration, comprising a cylindrical reactor having upper and bottom parts and a vertical axis; lower agitating-blades rotatably fitted in the lower part of said reactor and consisting of paddle blades or anchor blades; and at least two agitating rods secured in vertical direction at the positions above the said lower agitating-blades at different distances from the rotation axis.
Claim 19
Independent Claim
67 words
An apparatus for producing styrene-based polymer having mainly syndiotactic configuration, comprising a cylindrical reactor having upper and bottom parts and a vertical axis; lower agitating-blades rotatably fitted in the lower part of said reactor and consisting of paddle blades or anchor blades; and at least two agitating rods secured in vertical direction at the positions above the said lower agitating-blades at different distances from the rotation axis.
References Cited (Backward Citations)
No citation records indexed.
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