Two-step process for the preparation of (co) polychloroprene
US6034173A · kind A · utility
3Cited by
2References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 23, 1996 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Feb 23, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F36/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to the preparation of (co)polychloroprene latex in water emulsion, in the presence of an emulsifying system which comprises a first step (A) wherein a fraction f.sub.1 of monomers is used together with an emulsifying system which comprises a non-carboxylic ionic emulsifying agent (Ea1), a non-ionic emulsifying agent with a low HLB (Eb1) and a non-ionic emulsifying agent with a high HLB (Eb2), and a second step (B) wherein the reaction medium of step (A) is fed with the remaining fraction f.sub.2 of (co)monomers and the remaining emulsifying system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.