Abstract:
The invention provides a chemical-mechanical polishing composition comprising (a) an abrasive selected from the group consisting of alumina, ceria, titania, and zirconia, (b) a cationic copolymer comprising (A) a cationic monomer comprising a quaternary amino group and (B) a nonionic monomer, and (c) water. The invention also provides a method of polishing a substrate using the aforementioned polishing composition.
Abstract:
A controlled free radical polymerization process, which includes the steps of: adding a monofunctional iniferter compound to an oxygen-free solvent; heating the solution to a temperature sufficient to allow the iniferter compound to form two carbon centered radical residues; adding a first monomer composition comprising one or more monomers to the solution containing the radical containing residues; polymerizing the first monomer composition to form a quasi-living polymer; and optionally polymerizing a second monomer composition comprising one or more monomers, which are different than the first monomer composition. The resulting non-random copolymer having the general formula: φ-[-Ap-Bs-]t-φ where A and B are different compositions of ethylenically unsaturated monomers; p is an integer from 1 to 1,000; s is an integer from 0 to 1,000; t is an integer from 1 to 100; and φ is a residue from the iniferter.
Abstract:
Powder coating compositions having improved mar and scratch resistance are disclosed. The coatings generally comprise one or more particles that have been modified to render the particles more surface active. The improved resistance is achieved without affecting the appearance or mechanical performance of the coatings. Methods for using the coatings, and the substrates coated therewith, are also disclosed.
Abstract:
A thermosetting composition comprising a co-reactable solid, particulate mixture of (a) beta-hydroxyalkylamide crosslinking agent, e.g., bis(N,N-di-2-hydroxyethyl)adipamide, and (b) polycarboxylic acid functional polymer, is described. The polycarboxylic acid functional polymer is prepared by atom transfer radical polymerization and has well defined polymer chain architecture and polydispersity index of less than 2.5. The thermosetting compositions of the present invention have utility as powder coatings compositions.
Abstract:
A thermosetting composition comprising a co-reactable solid, particulate mixture of (a) beta-hydroxyalkylamide crosslinking agent, e.g., bis(N,N-di-2-hydroxyethyl)adipamide, and (b) polycarboxylic acid functional polymer, is described. The polycarboxylic acid functional polymer is prepared by atom transfer radical polymerization and has well defined polymer chain architecture and polydispersity index of less than 2.5. The thermosetting compositions of the present invention have utility as powder coatings compositions.
Abstract:
A thermosetting composition that includes: (a) a crosslinking agent having at least two functional groups reactive with hydroxyl groups; and (b) a non-gelled, hydroxyl functional polymer prepared by atom transfer radical polymerization. The polymer contains at least one of the following polymer chain structures: —{(M)p—(G)q}x— or —{(G)q—(M)p}x— wherein M is a residue, that is free of hydroxyl functionality, of at least one monomer; G is a residue, that has hydroxyl functionality, of at least one monomer; p and q represent average numbers of residues occurring in a block of residues in each polymer chain structure; and p, q, and x are each independently selected for each structure such that the hydroxyl functional polymer has a number average molecular weight of at least 250. Also provided are methods of coating a substrate using compositions of the present invention and substrates coated by such methods, as well as color-plus-clear composite coatings.
Abstract:
A thermosetting composition is provided comprising: (a) a crosslinking agent having at least two functional groups that are reactive with hydroxyl groups; and (b) a non-gelled, hydroxyl functional polymer prepared by atom transfer radical polymerization, in the presence of an initiator having at least one radically transferable group. The polymer contains at least one of the following polymer chain structures: —{(M)p—(G)q}x— or —{(G)q—(M)p}x— wherein M is a residue, that is free of hydroxyl functionality, of at least one ethylenically unsaturated radically polymerizable monomer; G is a residue, that has hydroxyl functionality, of at least one ethylenically unsaturated radically polymerizable monomer; p and q represent average numbers of residues occurring in a block of residues in each polymer chain structure; and p, q, and x are each independently selected for each structure such that the hydroxyl functional polymer has a number average molecular weight of at least 250.
Abstract:
A thermosetting composition comprising a co-reactable solid, particulate mixture of (a) polycarboxylic acid functional polymer, and (b) epoxy functional polymer, is described. The polycarboxylic acid functional polymer and epoxy functional polymer are each prepared by atom transfer radical polymerization and have well defined polymer chain architecture and polydispersity index of less than 2.5. The thermosetting compositions of the present invention have utility as powder coatings compositions.
Abstract:
The CMP compositions of the invention comprise not more than about 1 percent by weight of a particulate abrasive, a polyelectrolyte, which preferably has a weight average molecular weight of at least about 10,000 grams-per-mole (g/mol), a copper-complexing agent, and an aqueous carrier therefor. The polyelectrolyte can be an anionic polymer (e.g., an acrylate polymer or copolymer) or a cationic polymer (e.g., poly(2-[(methacryloyloxy)ethyl] trimethyl-ammonium halide). When an anionic polyelectrolyte is utilized, the copper-complexing agent preferably comprises an amino polycarboxylate compound (e.g., iminodiacetic acid or a salt thereof). When a cationic polyelectrolyte is utilized, the copper-complexing agent preferably comprises an amino acid (e.g., glycine). Preferably, the particulate abrasive comprises metal oxide such as titanium dioxide or silicon dioxide. Methods of polishing copper-containing substrates with the compositions are also disclosed.
Abstract:
A pigment dispersion that includes a pigment, an aqueous carrier, and a pigment dispersant. The pigment dispersant is prepared by atom transfer radical polymerization initiated and has the polymer chain structure: &phgr;—(G)p—(E)a—T where G is a residue of at least One ethylenically unsaturated monomer; E is a hydrophilic residue of at least one ethylenically unsaturated monomer; &phgr; is a hydrophobic residue of or derived from an initiator; T is or is derived from a radically transferable group from the initiator, p and s represent average numbers of residues occurring in a block of residues; p and s are each individually selected such that said pigment dispersant has a number average molecular weight of at least 250.