Patent TW-440586-B (TW)
Title: Polymers suitable as dispersing resins
Inventor: WEINGART FRANZ
IPC: C09K23/52
Filed: 1997-01-20
Granted: 2001-06-16
Abstract: A polymer which is suitable as a dispersing resin and is obtainable by reacting (A) 10 to 90% by weight of a polymer (A) obtainable by reacting at least one compound selected from the group consisting of (a1) at least one ester of acrylic acid or methacrylic acid and at least one alkyl alcohol selected form the group consisting of 2-ethylhexanol, nonanol, stearyl alcohol, lauryl alcohol, methanol, ethanol, n-propanol, isopropanol, n-butanol, secbutanol, tert-butanol, isobutanol, tert-butane-1-o1, (a2) at least one ester of vinyl alcohol and a saturated carboxylic acid selected from the group consisting of formic acid, butyric acid, isopropyl carboxylic acid, acetic acid and propionic acid, (a3) vinyl chloride and (a4) styrene or 4-ethyl styrene in the presence of at least one compound which contains an N-oxyl radical function selected from the group consisting of 2,2,6,6-tetramethyl-1-piperidinyloxy, 4-oxo-2,2,6,6,-tetramethyl-1-piperidinyloxy, 2,6-diphenyl-2,6-dimethyl-piperidinyloxy, 4-hydroxy-2,2,6,6-tetramethyl-1-piperidinyloxy, 2,2,5,5-tetramethyl-1-1-pyrrolidinyloxy, 3-carboxy-2,2,5,5-tetramethyl-1-pyrrolidinyloxy and di-tert-butyl nitroxide with (B) 10 to 90% by weight of one compound (B) comprising (b1) 50 to 100% by weight of, based on B of at least one compound selected from the group consisting of (b11) at least one ester of acrylic acid or methacrylic acid and at least one alcohol selected from the group consisting of 1,2-ethanediol, 1,3-propanediol, 1,4-butanediol, N,N,-dimethylaminoalcohol, ethylene glycolmonoethyl ether, 2-sulfoethanol, isethionic acid and 3-sulfopropanol (b12) at least one amide of acrylic acid or methacrylic acid and ammonia or at least one amide selected from the group consisting of 2-methyl-2-aminopropanesulfonic acid, 2-aminoethanesulfonic acid, 3-aminopropanesulfonic acid and metals salts thereof, (b13) at least one N-vinyl compound selected form the group consisting of N-vinylformaide, N-vinylpyrrolidone, N-vinylcaprolactam, N-vinylimidazole, vinylbenzesulfonic acid, (b14) styrene or 4-ethyl styrene and (b2) from 0 to 50% by weight, based on B, of at least one compound selected form the group consisting of (b21) at least one ester of acrylic acid or methacrylic acid and at least one alkyl alcohol selected form the group consisting of 2-ethylhexanol, nonanol, stearyl alcohol, lauryl alcohol, methanol, ethanol, n-propanol, isopropanol, n-butanol, sec-butanol, tert-butanol, isobutanol, tert-butane-1-o1, (b22) at least one ester of vinyl alcohol and a saturated carboxylic acid selected from the group consisting of formic acid, butyric acid, isopropyl carboxylic acid, acetic acid and propionic acid, (b23) vinyl chloride and (b244) styrene or 4-ethyl styrene, in the presence of at least one compound which contains an N-oxyl radical function selected from the group consisting of 2,2,6,6-tetramethyl-1-piperidinyloxy, 4-oxo-2,2,6,6-tetramethyl-1-piperidinyloxy, 2,6-diphenyl-2,6-dimethyl-piperidinyloxy, 4-hydroxy-2,2,6,6-tetramethyl-1-piperidinyloxy, 2,2,5,5-tetramethyl-1-pyrrolidinyloxy, 3-carboxy-2,2,5,5-tetramethyl-1-pyrrolidinyloxy and di-tert-butyl nitroxide. The polymer may be used as dispersing resins for pigment-containing coatings.