Polymer blends and compatibilizers
AssigneeZeneca Limited
InventorsAlfred J. P. Buckman, Denis G. H. Ballard
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Abstract
Blends of biodegradable polymers of hydroxybutyric acid and polyolefines of improved properties are produced by incorporating a compatibilising agent which comprises a block copolymer in which at least half of the mass of one block is represented by alkyl side chains and at least half of the mass of another block is represented by side chains which comprise hydroxy acid residues.
Claims16
A compatibilising agent which comprises a block copolymer in which in at least one block (Block A) at least half of the mass of the block is represented by alkylene or alkyl side chains and in which in at least one other block (Block B) at least half of the mass of the block is represented by side chains which comprise hydroxybutyric acid residues and optionally also other hydroxyalkanoate residues.
Dependencies are inferred from the claim text.