초록 ▼

A composition comprising a polymer which comprises repeat units derived from a first unsaturated amide, a hydroxy acrylate, and at least two monomers selected from the group consisting of (1) a vinyl pyridine or derivative thereof and acrylic acid or salt thereof, (2) a vinyl morpholine and a second

A composition comprising a polymer which comprises repeat units derived from a first unsaturated amide, a hydroxy acrylate, and at least two monomers selected from the group consisting of (1) a vinyl pyridine or derivative thereof and acrylic acid or salt thereof, (2) a vinyl morpholine and a second unsaturated amide; (3) acrylic acid or salt thereof and a second unsaturated amide; (4) acrylic acid or salt thereof, a vinyl pyridine, and a vinyl morpholine; and combination of two or more thereof wherein said first unsaturated amide is not the same as said second unsaturated amide.

대표청구항 ▼

[ That which is claimed is:] [1.] A composition comprising cement and a polymer which comprises repeat units derived from a first unsaturated amide, a hydroxy acrylate, and at least two monomers selected from the group consisting of (1) acrylic acid or a salt thereof and a monomer selected from the

[ That which is claimed is:] [1.] A composition comprising cement and a polymer which comprises repeat units derived from a first unsaturated amide, a hydroxy acrylate, and at least two monomers selected from the group consisting of (1) acrylic acid or a salt thereof and a monomer selected from the group consisting of 4-vinyl pyridine 2-vinyl pyridine, vinylpyridylacetic acid, vinyl pyridylacetonitrile, dicarbonitrile vinyl pyridine, vinylpyridine-N-oxide, 2-methyl-4-vinylpyridine, 2-phenyl-4-vinylpyridine, and combinations of two or more thereof; (2) a vinyl morpholine and a second unsaturated amide; (3) acrylic acid salt selected from the group consisting of ammonium and metal salts of acrylic acid and a second unsaturated amide; (4) acrylic acid or salt thereof, a vinyl pyridine, and a vinyl morpholine; and combination of two or more thereof wherein said first unsaturated amide is not the same as said second unsaturated amide.