EP0342234A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Styrenic polymer moldings
Assignee: Idemitsu Petrochemical Co Ltd
•
Filing: 1987-11-17
•
Granted: —
•
Expires: 2007-11-17
Abstract
Abstract Moldings excellent in mechanical strengths and heat resistance can be obtained by stretching styrenic polymers of not less than 100,000 in average molecular weight having mainly a syndiotactic structure. The moldings find various applications including ropes, cables, and reinforced composite materials.
Inventors
- 👤 Akikazu Idemitsu Kosan Company Limited Nakano
- 👤 Masakazu Idemitsu Kosan Company Limited Suzuki
- 👤 Nobuhide Idemitsu Kosan Company Limited Ishihara
- 👤 Masahiko Idemitsu Kosan Company Limited Kuramoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 19:37
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; B; B29; B29C; B29C55/00; B29C55/005; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08; B29K; B29K2025/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
27 words
A shaped article of a styrene-based polymer prepared by drawing a styrene-based polymer having a weight-average molecular weight of at least 100,000 and a mainly syndiotactic structure.
Claim 2
Dependent Claim
27 words
A shaped article of a styrene-based polymer prepared by drawing a styrene-based polymer having a weight-average molecular weight of at least 100,000 and a mainly syndiotactic structure.
Claim 3
Dependent Claim
37 words
The shaped article according to claim 1 wherein the styrene-based polymer has a stereospecificity of syndiotacticity of at least 85% in the racemic pentad as determined by the nuclear magnetic resonance spectrometric analysis with a carbon isotope.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.