A process for reducing the heat-seal temperature requirements of films and coatings produced from high vinylidene chloride polymer latexes comprising having present in films or coatings formed from such latexes, prior to fusion thereof, from about 0.5 to about 5 percent by weight of latex polymer solids of an adduct of an aliphatic alcohol or aliphatic acid and ethylene oxide, such adduct having the formula R-Y CH.sub.2 CH.sub.2 --O .sub.n Z where R is alkyl having from four to about 18 carbon atoms, Y is ##SPC1## n is an integer of from 4 to 25 and Z is hydrogen.
The invention relates to a method of using aqueous polymer dispersions based on acrylate-methacrylate copolymers as lamination adhesives for heat sealed glossy films, where the aqueous polymer dispersions have a solids content of from 20 to 65% by weight, the copolymer has a glass transition temperature of from -35.degree. to -10.degree. C., a K value of from 40 to 100 and a mean particle size of less than 200 nm, and the copolymer is obtainable by free-radical emulsion polymerization of: a) from 50 to 80 parts by weight of one or more comonomers from the group consisting of alkyl acrylates of alcohols having 2 to 10 carbon atoms, b) from 10 to 25 parts by weight of one or more comonomers from the group consisting of alkyl methacrylates of alcohols having 1 to 10 carbon atoms, and c1) from 0 to 10 parts by weight of one or more vinyl-aromatic comonomers, c2) from 0.1 to 4.0 parts by weight of one or more .alpha.,.beta.-unsaturated, monoolefinic carboxylic acids, c3) from 0 to 4.0 parts by weight of one or more .alpha..beta.-unsaturated, monoolefinic carboxamides, c4) from 0 to 8 parts by weight of one or more comonomers from the group consisting of hydroxyalkyl (meth)acrylates made from esters of acrylic acid or methacrylic acid and diols having 2 to 10 carbon atoms, and c5) from 0.1 to 4.0 parts by weight of one or more .alpha..beta.-unsaturated, monoolefinic compounds containing sulfonyl or sulfonate groups.
