Polymerization of ethylenically unsaturated monomer employing a catalyst system comprising dialkylpyrocarbonate, organic acid anhydride, alkaline reagent and H.sub.2 O.sub.2
US3985720A · kind A · utility
5Cited by
10References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 30, 1975 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | May 30, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S260/28
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Ethylenically unsaturated material susceptible to free-radical polymerization, e.g., vinyl chloride monomer, is polymerized, e.g., in an aqueous medium, with an initiator system comprising, in combination, alkaline reagent, e.g., sodium bicarbonate, organic acid anhydride, e.g., isobutyric anhydride, peroxygen compound selected from organic peroxy acid (peracid), e.g., peracetic acid, and hydrogen peroxide, and alkyl pyrocarbonate, e.g., diethyl pyrocarbonate. The initiator system is added to the polymerization medium in amounts sufficient to polymerize the ethylenically unsaturated material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.