Graft copolymers prepared by two staged aqueous emulsion polymerization
AssigneeRohm and Haas Company
InventorsDavid R. Amick, William D. Emmons, Dennis P. Lorah
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Abstract
This invention relates to a two stage aqueous emulsion polymerization process for making graft copolymers. In the first stage, at least one first ethylenically unsaturated monomer is polymerized in the presence of at least one mercapto-olefin compound to form a macromonomer with terminal functional groups. In the second stage, at least one second ethylenically unsaturated monomer is polymerized in the presence of the macromonomer such that a copolymer is formed with a backbone of polymerized units of the at least one second ethylenically unsaturated monomer and side chains of the macromonomer.
Claims24
A graft copolymer comprising:
- a) a macromonomer side chain with a degree of polymerization of 5 to 500 of polymerized monomer units of at least one first ethylenically unsaturated monomer;
- b) a backbone of polymerized units of at least one second ethylenically unsaturated monomer;
- and
- c) a mercapto-olefin compound attached to both the macromonomer and the backbone wherein a mercapto portion of the mercapto-olefin compound is attached to the macromonomer and a vinyl portion of the mercapto-olefin compound is attached to the backbone.
A polymer composition comprising a graft copolymer dispersed in water wherein the graft copolymer is composed of;
- a) a macromonomer side chain with a degree of polymerization of 5 to 500 of polymerized monomer units of at least one first ethylenically unsaturated monomer;
- b) a backbone of polymerized units of at least one second ethylenically unsaturated monomer;
- and
- c) a mercapto-olefin compound attached to both the macromonomer and the backbone wherein a mercapto portion of the mercapto-olefin compound is attached to the macromonomer and a vinyl portion of the mercapto-olefin compound is attached to the backbone.
Dependencies are inferred from the claim text.