EP0210615A2
Expired / Lapsed
EP
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Styrene polymers
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1986-07-26
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Granted: —
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Expires: 2006-07-26
Abstract
Abstract Styrene polymers the stereoregularity of which is mainly syndiotactic are disclosed, having a repeating unit represented by the general formula (I): (wherein all symbols are as defined in the appended claims) and a degree of polymerization of not less than 5. These styrene polymers are much superior in heat resistance to conventional atactic styrene polymers because of their syndiotactic structure and also are excellent in chemical resistance. Thus they are useful in production of molded articles which are needed to have such high heat resistance and chemical resistance.
Inventors
- 👤 Nobuhide Ishihara
- 👤 Masahiko Kuramoto
- 👤 Michitake Uoi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 18:33
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A styrene polymer having a repeating unit represented by the general formula (I): (wherein R represents a hydrogen atom, a halogen atom or a substituent containing a carbon atom, an oxygen atom, a nitrogen atom, a sulfur atom, a phosphorus atom or a silicon atom, and n represents an integer of 1 to 3), a degree of polymerization of not less than 5, and a stereoregularity which is mainly syndiotactic.
Claim 2
Dependent Claim
70 words
A styrene polymer having a repeating unit represented by the general formula (I): (wherein R represents a hydrogen atom, a halogen atom or a substituent containing a carbon atom, an oxygen atom, a nitrogen atom, a sulfur atom, a phosphorus atom or a silicon atom, and n represents an integer of 1 to 3), a degree of polymerization of not less than 5, and a stereoregularity which is mainly syndiotactic.
Claim 3
Dependent Claim
20 words
The sytrene polymer of Claim 1, wherein the syndiotacticity in terms of the racemic pentad is not less than 50%.
Claim 4
Dependent Claim
29 words
The styrene polymer of Claim 1, which is a polymer selected from the group consisting of polystyrene, poly(alkylstyrene), poly(halogenated styrene), poly(halogen-substituted alkylstyrene), poly(alkoxystyrene), poly(carboxyesterstyrene), poly(alkyletherstyrene), poly(alkylsilylstyrene), poly(ethylvinylbenzenesulfonate), and poly(vinylbenzyldimethoxyphosphide).
References Cited (Backward Citations)
No citation records indexed.
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