Abstract: Stain resistant composition comprises a hyperbranched polymer having pendent olefinic groups and comprising polymer units derived from one or more terminally-unsaturated, acyclic aliphatic diene and polymer units derived from maleic anhydride. Optionally, the hyperbranched polymer may further comprise polymer units derived from one or more 1-alkenes and/or a chain transfer agent. A method to provide stain resistance to a substrate comprises applying the stain resistant composition to said substrate. Suitable substrates include textiles and hard surfaces.

Abstract: A hyperbranched polymer having pendent olefinic groups and comprising polymer units derived from one or more terminally-unsaturated, acyclic aliphatic diene and polymer units derived from maleic anhydride. Optionally, the hyperbranched polymer may further comprise polymer units derived from one or more 1-alkenes and/or a chain transfer agent. A process to prepare the hyperbranched polymer comprises contacting maleic anhydride with at least one terminally unsaturated acyclic aliphatic diene having at least 7 carbon atoms in the presence of an effective amount of a radical initiator in an aprotic solvent under dilute conditions.

Abstract: A method for attaching chitosan to the surface of polymers that includes at least one rehydration step has been developed to provide more effective and stable chitosan coating. Polymers produced using this method and articles that are made with these polymers provide antibacterial and anti-odor properties.