Chloral copolymers
US3932318A · kind A · utility
4Cited by
2References
31Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1974 |
| Grant date | Jan 13, 1976 |
| Priority date | — |
| Expiry date | Dec 6, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2913
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Chloral is copolymerized with one or more isocyanate, isothiocyanate, diisocynate, diisothiocyanate or ketene compounds to produce copolymers which are nonflammable and which can be made into a variety of useful, shaped objects. The process of making the copolymers involves preparing a homogeneous mixture of monomers and polymerization initiator at a temperature above the threshold polymerization temperature of the mixture, cooling the homogeneous mixture below the threshold polymerization temperature and maintaining the homogeneous mixture quiescent during the polymerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.