Vinyl polybutadiene bisimide copolymers
US4216297A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1978 |
| Grant date | Aug 5, 1980 |
| Priority date | — |
| Expiry date | Feb 13, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3415
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Vinyl polybutadiene bisimide copolymers which are peroxide curable are provided by two methods of formation. In the first method a bisimide cross-linked vinyl polybutadiene prepolymer is formed by combining a high vinyl content polybutadiene providing pendant vinyl groups with a bisimide in the presence of a first free radical initiating catalyst. The resultant cross-linked prepolymer is cured to a hard resin by the formation of additional cross-linkages through the pendant vinyl groups by heating the prepolymer to a temperature of at least about 300.degree. F. in the presence of a second free radical initiating catalyst. The second method discloses a method wherein the bisimide cross-linkages are formed in situ. In the second method, a high vinyl content polybutadiene providing pendant vinyl groups is reacted with maleic anhydride to form a maleic anhydride vinyl polybutadiene adduct. The adduct is subsequently combined with an aromatic polyamine and a free radical initiating catalyst. The mixture is heated to about 250.degree. F. to form a prepolymer having bisimide cross-linkages between the vinyl polybutadiene backbone segments. By continuing to heat the prepolymer to at least …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.