Thermosetting polymers and prepolymers and a process for making them by polycondensation of a pyridine having at least three methyl substituants
US3994862A · kind A · utility
13Cited by
3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1975 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | Feb 6, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2918
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The thermosetting polymers and prepolymers of the invention are obtained by ondensing a pyridine comprising at least three methyl groups, such as trimethyl-2,4,6 pyridine, with an aromatic dialdehyde, such as trephthalic aldehyde at a temperature ranging from about 150.degree. to about 220.degree. C. They can be shaped and set by maintaining the temperature between about 200.degree. and about 300.degree. C. They are suitable for making laminates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.