Suspension polymerization of vinylidene aromatic compounds

Claim 1

IN A PROCESS FOR PREVENTING GRANULAR POLYMERIZATION PRODUCTS, THE IMPROVEMENT WHICH COMPRISES POLYMERIZING IN AQUEOUS DISPERSION A POLYMERIZABLE MATERIAL CONTAINING AN AROMATIC MONOMER OF THE GROUP CONSISTING OF A MONOVINYLIDENE AROMATIC HYDROCARBON, A RING-HALOGENATED MONOVINYLIDENE AROMATIC HYDROCARBON, AND MIXTURES THEREOF IN THE PRESENCE OF A DISPERSING AGENT OF THE GROUP CONSISTING OF: (A) A WATER-SOLUBLE INTERPOLYMER CONTAINING FROM 1+4N TO 10+5N MOL PERCENT OF A COMBINED (C6-C7 ALKYL) ESTER, (B) A WATER-SOLUBLE INTERPOLYMER CONTAINING FROM 0.5+1N TO 5+3N MOL PERCENT OF A COMBINED (C8-C9 ALKYL) ESTER, (E) A WATER-SOLUBLE INTERPOLYMER CONTAINING FROM 0.5+0.5N TO 2+5N MOL PERCENT OF A COMBINED (C10-C11 ALKYL) ESTER, (D) A WATER-SOLUBLE INTERPOLYMER CONTAINING FROM 0.3+0.7N TO 1.5+4.5N MOL PERCENT OF A COMBINED (C12-C15 ALKYL) ESTER, AND (E) A WATER-SOLUBLE INTERPOLYMER CONTAINING FROM 0.1+0.4N TO 1+1.5N MOL PERCENT OF A COMBINED (C16-C16 ALKYL) ESTER; EACH OF SAID ALKYL ESTERS BEING IN A MEMBER OF THE GROUP CONSISTING OF AN ALKYL ACRYLATE, AN ALKYL METHACRYLATE AND MIXTURES THEREOF; THE REMAINDER OF THE COMPOSITION OF EACH OF SAID WATER-INSOLUBLE INTERPOLYMERS BEING CONSTITUTED BY A COMBINED ACID OF THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, AND MIXTURES THEREOF; N IN THE ABOVE FORMULAS REPRESENTING THE MOL FRACTION OF ACRYLIC ACID INCLUDED IN THE ACIDIC COMPONENT OF THE INTERPOLYMER.