Hydrocarbon/ethylene oxide random graft copolymers
US4254238A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1975 |
| Grant date | Mar 3, 1981 |
| Priority date | — |
| Expiry date | Dec 1, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08C19/42
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Random graft copolymers comprising an essentially linear hydrocarbon base polymer having grafted thereto at least three ethylene oxide polymer chains, at least one of the ethylene oxide polymer chains being randomly located on the base polymer, are useful for preparing films and as antistatic agents for fiber forming polymers. These graft copolymers are formed by the steps of PA1 (a) contacting an essentially linear hydrocarbon base polymer containing at least three active sites selected from the group consisting of terminal lithium atoms and randomly located lithiatable hydrogen atoms, at least one of the active sites being a randomly located lithiatable hydrogen atom with a hydrocarbyllithium in the presence of a tertiary aliphatic diamine, PA1 (b) contacting the resulting lithiated base polymer with ethylene oxide followed by protonation with acid, PA1 (c) contacting the resulting hydroxyethylated base polymer with hydrocarbylpotassium, PA1 (d) contacting the resulting potassium oxyethylated base polymer with ethylene oxide in an amount sufficient to provide at least three ethylene oxide polymer chains, at least one of the ethylene oxide polymer chains being randomly located. Al…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.