Regulation of the degree of polymerization of vinyl or vinylidene monomers with 2,5-dihydrofurans
US3985942A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1975 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | Jan 15, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/38
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing vinyl or vinylidene polymers comprising polymerizing vinyl or vinylidene monomers in the presence of 0.1 to 5.0 % by weight of at least one compound represented by the following formula based upon the total weight of monomers, wherein the degree of polymerization of the vinyl or vinylidene polymers is controlled, ##EQU1## wherein R.sub.1 is --CR.sub.5 R.sub.6).sub.n wherein R.sub.5 and R.sub.6 are hydrogen atoms or alkyl groups containing 1 to 4 carbon atoms and n is an integer of 1 or more; R.sub.2 is a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms; and R.sub.3 and R.sub.4 are hydrogen atoms or alkyl groups containing 1 to 4 carbon atoms may be combined to form a ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.