Invention Grant
- Patent Title: Syndiotactic polypropylene
- Patent Title (中): 间规聚丙烯
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Application No.: US854150Application Date: 1992-03-20
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Publication No.: US5476914APublication Date: 1995-12-19
- Inventor: John A. Ewen , Abbas Razavi
- Applicant: John A. Ewen , Abbas Razavi
- Applicant Address: TX Dallas
- Assignee: Fina Technology, Inc.
- Current Assignee: Fina Technology, Inc.
- Current Assignee Address: TX Dallas
- Main IPC: C08F10/06
- IPC: C08F10/06 ; C08F4/602 ; C08F4/642 ; C08F4/659 ; C08F4/6592 ; C08F8/00 ; C08F110/06
Abstract:
The invention provides for highly crystalline syndiotactic polypropylene comprising a high percentage of racemic (r) dyads. The high crystallinity may be due to the polymerization mechanism of metallocene catalysts of a particular structure which appear to produce syndiotactic polypropylene of a new microstructure.
Public/Granted literature
- US5940791A Method and apparatus for speech analysis and synthesis using lattice ladder notch filters Public/Granted day:1999-08-17
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