Invention Grant
- Patent Title: High molecular weight polycondensates from solid phase condensation
- Patent Title (中): 高分子量缩聚物由固相缩合而成
-
Application No.: US635364Application Date: 1975-11-26
-
Publication No.: US4080317APublication Date: 1978-03-21
- Inventor: Gottfried Morawetz , Lothar Buxbaum
- Applicant: Gottfried Morawetz , Lothar Buxbaum
- Applicant Address: CH Basel
- Assignee: Ciba-Geigy AG
- Current Assignee: Ciba-Geigy AG
- Current Assignee Address: CH Basel
- Priority: OE9572/70 19701023; OE9573/70 19701023
- Main IPC: C08G63/80
- IPC: C08G63/80 ; C08G63/82 ; C08G63/14 ; C08G63/18 ; C08G63/26
Abstract:
Polyester precondensates are catalytically polycondensed in solid phase at a constant temperature with a linear increase (during polycondensation) in intrinsic viscosity. The linear increase makes possible an accurate advance determination of reaction time required to produce thermoplastic polycondensate of the desired intrinsic viscosity.
Public/Granted literature
- US5799972A Inflator for inflating an air bag having magnetically coupled internal ignition Public/Granted day:1998-09-01
Information query
