Low Molecular Weight Graft Copolymers
AssigneeAkzo Nobel N.V.
InventorsKlin A. Rodrgues, Jannifer Sanders
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Abstract
Low molecular weight graft copolymer comprising a synthetic component formed from at least one or more olefinically unsaturated carboxylic acid monomers or salts thereof, and a natural component formed from a hydroxyl-containing natural moiety. The number average molecular weight of the graft copolymer is about 100,000 or less, and the weight percent of the natural component in the graft copolymer is about 50 wt % or greater based on total weight of the graft copolymer. Processes for preparing such graft copolymers are also disclosed.
Claims39
Low molecular weight graft copolymer comprising:
- a synthetic component formed from at least one or more olefinically unsaturated carboxylic acid monomers or salts thereof, and
- a natural component formed from a hydroxyl-containing natural moiety,
- wherein the number average molecular weight of the graft copolymer is about 100,000 or less, and
- wherein the weight percent of the natural component in the graft copolymer is about 5 wt % or greater based on total weight of the graft copolymer.
Process for producing low molecular weight graft copolymers having a synthetic component and a natural component, the process comprising:
- degrading the natural component to a number average molecular weight of about 100,000 or less,
- reacting the natural component with a free radical initiating system having a metal ion to generate free radicals on the natural component, and
- polymerizing the free radical-containing natural component with a synthetic component,
- wherein the low molecular weight graft copolymer has a Gardner color of about 12 or less.
A graft copolymer comprising:
- a synthetic component formed from at least one or more olefinically unsaturated carboxylic acid monomers or salts thereof, and
- a natural component formed from a hydroxyl-containing natural moiety,
- wherein the weight percent of the natural component in the graft copolymer is about 5 wt % or greater based on total weight of the graft copolymer.
Dependencies are inferred from the claim text.