Polymeric materials with acid end groups
AssigneeE. I. Du Pont de Nemours and Company
InventorFrank N. Jones
Life of this patent
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Abstract
Polymeric materials represented by the general structure ##STR1## WHERE Q is a polymeric segment of ethylenically unsaturated monomers, lacking Zerewitinoff hydrogen atoms; X is the residue of a chain transfer agent; Y is the residue of a di-, tri- or tetraisocyanate radical after removal of isocyanate groups; A is the residue of an acid radical having a pk.sub.a value of -1 to 6; and m and n are 1, 2 or 3, (the total not exceeding 4), Are useful as aids for dispersing solid particles in organic liquids.
Claims14
A polymeric material represented by the structure ##STR17## where Q is a non-resinous polymeric or copolymeric segment of
- a. an ester of acrylic acid or methacrylic acid with an alkanol of 1-18 carbon atoms;
- b. styrene or acrylonitrile;
- c. a vinyl ester derived from an acid of 2 through 18 carbon atoms;
- or
- d. a vinyl ether;
- X is the residue of a chain transfer agent;
- Y is the residue of a di-, tri-, or tetraisocyanate radical after removal of isocyanate groups;
- A is the residue of an acid radical having a pk.sub.a value of -1 to 6;
- and
- m and n are 1, 2 or 3, the total not exceeding 4, provided that when n is 2 or 3, only one of A need be as defined.
A polymeric material represented by the structure ##STR21## where Q is a non-resinous methyl methacrylate /2-ethylhexyl acrylate polymeric segment.
A polymeric material represented by the structure ##STR22## where Q is a non-resinous lauryl methacrylate/ethyl acrylate/methyl methacrylate polymer segment.
Dependencies are inferred from the claim text.