Seed process for salt dispersion polymer
US6133368A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1993 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Dec 9, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/60
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A dispersant system useful in the formation of dispersions of water soluble polymers is disclosed. The dispersant system comprises two polymers, the first being a copolymer of diallyldimethyl ammonium chloride with a C.sub.6 to C.sub.20 quaternary ammonium salt of a monomer selected the from the group consisting of dialkylaminoalkylacrylates, dialkylaminoalkylmethacrylates, dialkylaminoalkylacrylamides, and dialkylaminoalky (meth) acrylamides as well as certain alkyl esters of acrylic acid. The second polymer is a water soluble cationic polymer composed of at least 20 mole percent of a cationic monomer represented by the formula: ##STR1## where R.sub.4 is either hydrogen or CH.sub.3 ; R.sub.5 and R.sub.6 are each an alkyl group having 1 to 2 carbon atoms; R.sub.7 is a hydrogen atom or an alkyl group having 1 to 2 carbon atoms; A.sub.2 is either an oxygen atom or NH; B.sub.2 is either an alkylene group having 2 to 4 carbon atoms or a hydroxypropylene group and X.sub.2.sup.- is an anionic counterion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.