EP0376748A2
Expired / Lapsed
EP
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Methacrylimide containing polymer
Assignee: Mitsubishi Chemical Corp
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Filing: 1989-12-29
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Granted: —
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Expires: 2009-12-29
Abstract
Abstract A methacrylimide containing polymer, which is a thermoplastic polymer comprising from 2 to 100% by weight of a structural unit represented by the general formula (I): <CHEM> where R represents a hydrogen atom or an aliphatic group, aromatic group or cycloaliphatic hydrocarbon group with 1 to 20 carbon atoms, and from 0 to 98% by weight of a structural unit derived from an ethylenic monomer, in which a distribution range of an imidization ratio of the polymer is less than 5%. The methacrylimide containing polymer has excellent transparency and heat resistance.
Inventors
- 👤 Isao C/O Central Research Laboratories Saski
- 👤 Kozi Toyama Plants Mitsubishi Rayon Co.Lt Nishida
- 👤 Hisao Central Research Laboratories Anzai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 20:04
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C08F8/48; C08F20/00; C08F20/02; C08F20/52
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
73 words
A methacrylimide containing polymer comprising from 2 to 100% by weight of a structural unit represented by the general formula (I): where R represents a hydrogen atoms or an aliphatic group, aromatix group or cycloaliphatic hydrocarbon group with 1 to 20 carbon atoms, and from 0 to 98% by weight of a structural unit derived from an ethylenic monomer characterised in that the distribution range of the imidization ratio is less than 5%.
Claim 2
Dependent Claim
73 words
A methacrylimide containing polymer comprising from 2 to 100% by weight of a structural unit represented by the general formula (I): where R represents a hydrogen atoms or an aliphatic group, aromatix group or cycloaliphatic hydrocarbon group with 1 to 20 carbon atoms, and from 0 to 98% by weight of a structural unit derived from an ethylenic monomer characterised in that the distribution range of the imidization ratio is less than 5%.
Claim 3
Dependent Claim
37 words
The methacrylimide containing polymer as defined in claim 1, wherein the number of fine particles sized from 0.5µm to 25µm in the polymer as measured by a fine particle counter is less than 50,000/g of the polymer.
Claim 4
Dependent Claim
26 words
The methacrylimide containing polymer as defined in claim 1 or claim 2, wherein the molecular weight (Mw) as measured by GPC is from 50,000 to 200,000.
Claim 5
Dependent Claim
25 words
The methacrylimide containing polymer as defined in any preceding claim wherein the content of amide segments in the polymer is less than 5% by weight.
Claim 6
Dependent Claim
49 words
The methacrylimide containing polymer as defined in any preceding claim wherein the amount of low molecular weight amide derivatives as a volatile ingredient in the polymer is less than 1000 ppm and the amount of the residual monomers as the volatile ingredient in the polymer is less than 500ppm.
Claim 7
Dependent Claim
27 words
The methacylimide containing polymer as defined in any preceding claim wherein a YI (yellow index) value as measured by a color difference meter is 3 or below.
Claim 8
Dependent Claim
41 words
A process for preparing the polymer according to any preceding claim wherein the polymer is obtained by a continuous imidizing device capable of obtaining products of substantially identical imidization ratio stably even during continuous operation for a long period of time.
References Cited (Backward Citations)
No citation records indexed.
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