Process for dewatering a grafted rubber latex
US4284737A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1979 |
| Grant date | Aug 18, 1981 |
| Priority date | — |
| Expiry date | Nov 5, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a process for dewatering an aqueous latex containing rubber particles grafted with alkenyl aromatic and alkenyl nitrile monomers and emulsified with an anionic surfactant wherein alkenyl aromatic and alkenyl nitrile monomers are dispersed in said latex along with a cationic surfactant in an amount sufficient to deemulsify said grafted rubber particles. The grafted rubber particles are extracted from the aqueous phase into the monomer phase as a liquid oil phase, with the aid of the cationic surfactant, said aqueous phase forming a separate water phase essentially free of said oil phase followed by separating said water phase from said liquid oil phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.