Method for the prevention of hydrolysis of polyesterification catalysts
US4433135A · kind A · utility
15Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1982 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Jul 14, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/82
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The use of aluminum sulfate as a dessicant for drying the starting materials used in polymerization reactions employing readily hydrolyzable catalysts is disclosed. The aluminum sulfate is allowed to remain in the reaction mixture during polymerization, and, indeed, may advantageously be allowed to remain in the reaction product without any deleterious effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.