Multi-stage latex polymers, process of making the same, and coating compositions made thereof
AssigneesDow Global Technologies LLC, Rohm and Haas Company
InventorsWei Cui, Tao Wang, Longlan Cui, James C. Bohling
Life of this patent
Estimating the term…
Abstract
A latex polymer of multi-stage polymerization comprising a first stage polymer and a second stage polymer wherein the first stage polymer comprises a first portion of an acrylic monomer and a first portion of a phosphorus acid monomer, and the second stage polymer comprises a second portion of an acrylic monomer and a second portion of a phosphorus acid monomer. A process of making such latex polymer.
Claims9
A latex polymer of multi-stage polymerization comprising a first stage polymer and a second stage polymer wherein the first stage polymer comprises a first portion of an acrylic monomer and a first portion of a phosphorus acid monomer, and the second stage polymer comprises a second portion of an acrylic monomer and a second portion of a phosphorus acid monomer;
- wherein the amount of the first portion of the phosphorus acid monomer is from 4 to 6 weight percent of total weight of the first stage polymer;
- the amount of the second portion of the phosphorus acid monomer is from 49 to 99 weight percent of total weight of the first portion of the phosphorus acid monomer;
- the first portion of the acrylic monomer is from 8 to 15 weight percent of total weight of the first and the second portions of the acrylic monomer;
- the Tg of the latex polymer is in the range of 0° C. to 30° C.,
- wherein at least one of the first and the second portions of the phosphorus acid monomer is selected from phosphoethyl methacrylate and phosphopropyl methacrylate;
- and
- at least one of the first and the second portions of the acrylic monomers comprises methyl methacrylate.
Dependencies are inferred from the claim text.