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US 7,402,624 B2Granted
Graft copolymers with segmented arms and their preparation and use
AssigneeE.I. du Pont de Nemours and Company
InventorSheau-Hwa Ma
Life of this patent
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Abstract
Graft copolymers with segmented (or block) arms and a process for preparing the same. Such polymers are particularly useful in formulating air-dry clear coat and color coat lacquers used in automotive refinishing.
Claims22
A composition, comprising a graft copolymer having segmented arm(s), wherein the graft copolymer has a polymeric backbone and at least two polymeric segments that form the arms, said segments being grafted onto the backbone, wherein
- (a) the backbone is of polymerized ethylenically unsaturated monomers;
- and
- (b) the segmented arm(s) are of polymerized ethylenically unsaturated monomers that are attached to the backbone via a single point on the segmented arms, and wherein the at least two polymeric segments comprise differing compositions from those of adjacent segment(s), and
- (c) wherein the segmented arms are either:
- (i) block type segments formed from combinations of two monomers (AB) or three monomers (ABC) or (ii) tapered structure.
2 more elements
Dependencies are inferred from the claim text.