An aqueous polymer dispersion is disclosed for use in coating compositions comprising monomer compositions A and B, wherein the difference of the T.sub.g of A and B after monomer polymerization is at least 60.degree. C. and with the highest of such T.sub.g being at least 40.degree. C., with the overall monomer composition being formed by ethylenically unsaturated compounds comprising: 1) one or more compounds selected from alkenyl aromatic monomer, acrylonitrile, an alkyl, (hetero)cycloalkyl or aralkyl ester of acrylic acid and methacrylic acid having 4-22 carbon atoms, acrylamide and methacrylamide, acrylamide and methacrylamide N-substituted with an alkyl, cycloalkyl or aralkyl group having 1-18 carbon atoms, vinyl acetate and vinyl versatate, optionally having a second functional group for reacting with curing agent, 2) an ethylenically unsaturated carboxylic acid and 3) a nitrogenous adhesion promoting, copolymerizable monomer.

_ uno acuoso polímero dispersión ser divulgar para utilizar en cubrir composición comprising monomer composición uno y b, en donde diferencia T.sub.g uno y b después monomer polimerización ser por lo menos 60.degree. _ c. _ y con alto tal T.sub.g ser por lo menos 40.degree. _ c., con total monomer composición ser formar por ethylenically no saturado componer comprising: _ 1) uno o más componer seleccionar alkenyl aromático monomer, acrylonitrile, uno alkyl, (hetero)cycloalkyl o aralkyl éster de acrílico ácido y methacrylic ácido tener 4-22 carbón átomo, acrilamida y methacrylamide, acrilamida y methacrylamide n-sustituido con uno alkyl, cycloalkyl o aralkyl grupo tener 1-18 carbón átomo, vinilo acetato y vinilo versatate, opcional tener uno segundo funcional grupo para reacting con curing agente, 2) uno ethylenically no saturado carboxylic ácido y 3) uno nitrogenado adherencia promoting, copolymerizable monomer. _