Titanate esters useful as polymerization initiators for macrocylic polyester oligomers
US5661214A · kind A · utility
37Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1996 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Aug 5, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/85
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Macrocyclic polyester oligomer compositions are polymerized to high molecular weight polyesters by heating with a titanate ester composition comprising moieties having oxygen or nitrogen chelated with a titanium atom or having two titanium atom connected by alkylene ester units. Depending on the chemical nature of the initiator, the polymerization reaction may be extremely rapid as desired for structural reaction injection molding, or may have an induction period as desired for resin transfer molding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.