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US 9,000,101 B2Granted
Anhydride end-capping of polymers
AssigneeXerox Corporation
InventorsAndrew J. Myles, Jordan H. Wosnick, Karen A. Moffat, Valerie M. Farrugia
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Abstract
The disclosure describes a neat, one-pot scheme for reacting a hydroxyl propagating end of a polymer with a cyclic acid anhydride to form a free acid terminus.
Claims20
A process comprising:
- polymerizing a first cyclic component and an optional second cyclic component to form a homopolymer or a copolymer resin using a ring opening polymerization (ROP) process;
- and,
- reacting a cyclic acid anhydride with a propagating terminal hydroxyl group of the homopolymer or copolymer with at least one catalyst and an optional initiator to form a free acid end group,
- wherein the polymerizing and reacting occur under neat Conditions, and standard pressure and humidity, in a single vessel.
1 more element
A process comprising;
- polymerizing as first cyclic, monomer with at least one catalyst and at least one optional initiator to form a homopolymer;
- polymerizing a carbonate monomer to said homopolymer to form a second block of a diblock copolymer;
- polymerizing a second cyclic component to said second block of the diblock copolymer to form a third block of a triblock copolymer, wherein said third block comprises a terminal propagating hydroxyl group;
- and
- reacting a cyclic acid anhydride with said hydroxyl group to form a terminal free acid group, wherein the polymerizing and reacting steps are carried out under neat conditions in a single vessel under standard pressure and ambient humidity.
2 more elements
Dependencies are inferred from the claim text.