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US 5,556,708 AGranted
Process for grafting of nitrogen containing polymers and polymers obtained thereby
AssigneeSartorius AG
InventorsHans-Heinrich Horl, Dietmar Nussbaumer, Eberhard Wunn
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Abstract
There is disclosed a method for grafting unsaturated monomers to nitrogen-containing polymers in an aqueous environment and in the presence of carbon tetrachloride and certain reducing agents.
Claims17
A method of conducting a graft polymerization reaction between the components A and B, wherein
- component A comprises at least one ethylenically unsaturated monomer and
- component B comprises a nitrogen-containing polymer selected from the group consisting of polyamides, polysulfonamides, polyurethanes, and polymers having primary or secondary amino groups in a side chain,
- the method comprising contacting component B with component A in an aqueous environment in the presence of two reactants, said two reactants consisting essentially of (1) carbon tetrachloride and (2) a reducing agent selected from of sodium dithionite, rongalite, hydrazine, and ascorbic acid.
Dependencies are inferred from the claim text.