Method for thickening a polyester resin
US6409949B1 · kind B1 · utility
26Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2000 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Mar 24, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/0005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A polyester resin is thickened in a chamber 4 by first introducing the feed resin through a port 2 and dehydrating in a drying section 14 under reduced pressure. A chemical agent is then added to the dehydrated feed resin and mixed therewith in a thickening section 15. The mixing occurs while deaerating under reduced pressure. The chemical agent functions to either increase the viscosity of the feed resin or suppress the lowering thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.