Polyester polymers and aqueous dispersions thereof
First Claim
1. A water dispersible polyester polymer comprising one or more polyester chains and one or more non-ionic polyoxyalkylene chains in which at least 40% of the repeating oxyalkylene units are oxyethylene units, said polyester polymer having a structure in which one or more of the polyoxyalkylene chains are pendent to at least one of the polyester chains.
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Abstract
A water dispersible polyester polymer is described having one or more polyester chains and one or more non-ionic polyoxyalkylene chains in which at least 40% of the repeating oxyalkylene units are oxyethylene units. The polyester polymer has a structure in which one or more of the polyoxyalkylene chains are pendent to at least one of the polyester chains. The poloxyalkylene chains provide the polyester with non-ionic stabilization enabling the polyester to form aqueous dispersions which possess good colloid stability.
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Citations
36 Claims
- 1. A water dispersible polyester polymer comprising one or more polyester chains and one or more non-ionic polyoxyalkylene chains in which at least 40% of the repeating oxyalkylene units are oxyethylene units, said polyester polymer having a structure in which one or more of the polyoxyalkylene chains are pendent to at least one of the polyester chains.
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14. A process for preparing a water dispersible polyester polymer comprising one or more polyester chains and one or more non-ionic polyoxyalkylene chains in which at least 40% of the repeating oxyalkylene units are oxyethylene units, said polyester polymer having a structure in which one or more of the polyoxyalkylene chains are pendent to at least one of the polyester chains, said process comprising at least the steps of:
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(A) preparing a polyester precursor polymer comprising one or more reactive functional groups and polymerised units derived from esterifiable monomers; and (B) incorporation of the polyoxyalkylene chain(s) by reacting the polyester precursor polymer with a compound having a polyoxyalkylene chain and a reactive functional group which is co-reactive with the reactive functional group(s) of the polyester precursor polymer. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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- 29. An aqueous dispersion of a water dispersible polyester polymer comprising one or more polyester chains and one or more non-ionic polyoxyalkylene chains in which at least 40% of the repeating oxyalkylene units are oxyethylene units, said polyester polymer having a structure in which one or more of the polyoxyalkylene chains are pendent to at least one of the polyester chains.
Specification