Branched Ionomers with Metal Methacrylates as Comonomers
AssigneeFina Technology, Inc.
InventorsOlga Khabashesku, Scott Cooper
Life of this patent
Estimating the term…
Abstract
A branched aromatic ionomer is prepared with a first monomer having an unsaturated moiety and a second monomer having an unsaturated moiety and an ionic moiety, wherein the ionic moiety comprises a polyvalent metal with a coordination number greater than its oxidation number. An example of the first monomer is styrene, and the product ionomer can be a variety of general purpose polystyrene. Examples of the second monomer are zirconium methacrylate and titanium methacrylate, which may be co-polymerized with at least 0.5 molar equivalents of methacrylic acid as an in-situ formed ionomeric crosslinker.
Claims23
A branched ionomer comprising the product of co-polymerizing a first monomer comprising an unsaturated alkyl moiety with a second monomer comprising an unsaturated moiety and an ionic moiety, wherein the ionic moiety comprises an anionic group and a cationic group, wherein the cationic group comprises a polyvalent metal having a coordination number greater than its oxidation number.
A process for preparing a branched ionomer comprising copolymerizing a first monomer comprising an unsaturated alkyl moiety and a second monomer comprising an ionic moiety and at least one unsaturated moiety, wherein the ionic moiety comprises an anionic group and a cationic group, wherein the cationic group comprises a polyvalent metal having a coordination number greater than its oxidation number.
A process of estimating the melt strength of a branched ionomer containing a polyvalent metal having a coordination number greater than its oxidation number comprising:
- determining the linear relationship between the polyvalent metal loading and melt flow rate of the branched ionomer;
- determining the linear relationship between the polyvalent metal loading and melt strength of the branched ionomer;
- determining the linear relationship between the melt flow rate and melt strength of the branched ionomer;
- measuring the melt flow rate of a sample of the branched ionomer;
- and
- estimating the melt strength of the branched ionomer sample from the linear relationship between the melt flow rate and melt strength of the branched ionomer.
Dependencies are inferred from the claim text.