Vinyl chloride (co)polymer with low monomeric vinyl chloride content - by suspension polymerisation in presence of porosity improver and wax

The (co)polymer is prepd. by addn. of a porosity improver and a wax before polymerisation, and polymerising at 30-75 degrees C(45-72 degrees C) in presence of an initiator (system), pref. an organic peroxide, and of a suspending agent, in a system contg. an aq. and an organic phase. Pref. the polymer is PVC or a copolymer of vinyl chloride with is not >50 (is not >30) wt.% of vinyl acetate, vinylidenen chloride, vinyl bromide, esters of acrylic, fumaric or maleic acid, vinyl ethers of lauryl, cetyl or stearyl alcohol, ethylene, propylene or butylene. Pref. porosity improvers are nonionic emulsifiers, esp. partial esters and ethers of polyols with >2 OH gps., e.g. glycerol, pentaerythritol, or esp. sorbitol and sorbitan, with 10-20C fatty acids and alcohols, and ehters and esters of ethylene oxide oligomers. The (c)polymer may be used to produce containers for food and drink. Residual monomer is removed easily by de-gassing. The (co)polymer has high bulk density. The K value is not affected. There is little crust formation.