Process for the production of aqueous polymer latices

Claim 1

A PROCESS FOR THE PRODUCTION OF POLYMER LATICES IN THE AQUEOUS PHASE COMPRISING POLYMERIZING A MIXTURE OF MONOMERS IN AN AQUEOUS SOLUTION AT ELEVATED TEMPERATURES, SAID MONOMER MIXTURE CONSISTING, BY WEIGHT, A. 40-65 PERCENT OF MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, SUNSTITUTED STYRENE, AND MIXTURES THEREOF, B. 30-55 PERCENT OF A FUMARIC ACID DIESTER HAVING 2-4 CARBON ATOMS IN THE ALCOHOL COMPONENT, g C. 1-10 PERCENT OF A DIENE COMPOUND OF 4-5 CARBON ATOMS, D. 0.3-4 PERCENT OF AN ETHYLENICALLY UNSATURATED ACID HAVING ONE TO TWO CARBOXYLIC GROUPS, SAID AQUEOUS SOLUTION COMPRISING THE FOLLOWING MATERIALS EACH BASED ON 300 PARTS OF MONOMER MIXTURE, E. 0.1-1.0 PARTS OF AN ANIONIC EMULSIFIER SELECTED FROM THE GROUP CONSISTING OF (1) ALKYL SULFATES HAVING 10-20 CARBON ATOMS, ALKYL SULFONATES HAVING 10-20 CARBON ATOMS, AND MIXTURES THEREOF, (2) ALKYLARYL SULFONATES HAVING 8-12 CARBON ATOMS IN THE ALKYL CHAIN AND MIXTURE THEREOF, (3) AMMONIUM SALTS OF A-SULFOFATTY ACIDS HAVING 10-20 CARBON ATOMS AND MIXTURES THEREOF, (4) ALKALI SALTS OF A-SULFOFATTY ACIDS HAVING 10-20 CARBON ATOMS, AND MIXTURES THEREOF, F. 0.2-2 PARTS OF A NIONIC EMULSIFIER SELECTED FROM THE GROUP CONSISTING OF A POLYGLYCOL ESTER PRODUCED BY THE REACTION OF 1 MOL OF FATTY ALCOHOLS OF 10-20 CARBON ATOMS WITH 3-30 MOL OF ETHYLENE OXIDE, A POLYGLYCOL ETHER PRODUCED BY THE REACTION OF 1 MOL OF ALKYL PHENOLS OF 4-12 CARBON ATOMS IN THE ALKYL CHAIN WITH 3-30 MOL OF ETHYLENE OXIDE, AND MIXTURES THEREOF, G. 0.5-2 PARTS OF A WATER SOLUBLE PEROXYDISULFATE, SAID POLYMER LATICES PRODUCED HAVING A LOW VISCOSITY WITH A HIGH SOLIDS CONTENT, BEING STABLE TO ELECTROLYTES, HAVING A LOW COAGULATE CONTENT, AND BEING SUBSTANTIALLY FREE OF GELS.