| 摘要 |
Homopolymers, copolymers or graft polymers of vinyl chloride which contain at least 85% by weight, based on the total polymer, of polymerized vinyl chloride and which optionally contain further comonomers and/or graft polymers in copolymerized form are prepared continuously in aqueous emulsion in the presence of at least one water-soluble catalyst and in the presence of from 1.5 to 3.5% by weight, based on the monomer employed, of at least one water-soluble emulsifier. The water-soluble emulsifier used is at least one water-soluble salt of an aliphatic, saturated monocarboxylic acid of the formula I or a mixture of a salt as mentioned above with at least one sodium, potassium or ammonium salt of a sulphate- or sulpho-containing organic compound which is effective as an emulsifier. The substituents in the formula I are as defined in Claim 1. <IMAGE> |
