Modified copolymers
US3998994A · kind A · utility
10Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 1975 |
| Grant date | Dec 21, 1976 |
| Priority date | — |
| Expiry date | May 12, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Modified copolymers which have viscosities which vary very markedly with changes in temperature are obtained by malaxating a statistical copolymer of ethylene and maleic anhydride containing between 0.5 and 20% by weight of units derived from maleic anhydride and having a melt index of between 0.1 and 500 dg/min, in the molten state with at least one chemical reagent containing at least two reactive groups which are amine or alcoholic --OH groups but at most primary or secondary amine group and at least one alcoholic --OH group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.