Amine-modified polyethers
AssigneeThe Dow Chemical Company
InventorsRichard H. Symm, Byford D. Sheffield
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Abstract
Water-soluble amine-modified polyethers are made by reacting an excess of alkylene polyamine such as ethylenediamine or diethylenetriamine with a halogen-containing polyether prepared by Reacting with a poly epoxide: A. a halogen-containing alkylene oxide monomer, or B. a mixture thereof with a non-halogen-containing alkylene oxide monomer, wherein said mixture contains at least about 50 mole percent of said halogen-containing monomer. These amine modified polyethers may be additionally crosslinked by reacting with a difunctional compound, e.g. ethylene dichloride, to an extent which does not appreciably affect its solubility in water. The products are useful as drainage aids in paper pulp slurries and as flocculants.
Claims12
A water-soluble amine-modified polyether made by reacting an excess of an alkylene polyamine with a halogen-containing polyether prepared by
- reacting with 0.1 to 10 mole percent of a poly-1,2-epoxide:
- a. a halogen-containing alkylene oxide monomer, or
- b. a mixture thereof with a non-halogen-containing alkylene oxide monomer, wherein said mixture contains at least about 50 mole percent of said halogen-containing monomer.
A water-soluble amine-modified polyether made by reacting an excess of ethylene diamine with a halogen containing polyether prepared by reacting epichlorohydrin with 0.1 to 10 mole percent of the diglycidyl ether of bisphenol A.
Dependencies are inferred from the claim text.