Synthesis of Polymer Polyols by Using Preformed Aqueous Polymeric Lattices

1 Synthesis of Polymer Polyols by Using Preformed Aqueous Polymeric Lattices 

A very simple method to obtain polymeric dispersions in liquid polyethers is to make a mixture between a polyether polyol and a polymeric latex, such as the azeotropic copolymer styrene - ACN (StACN copolymer), obtained by emulsion copolymerisation, having around 20-40% solid content. The water is eliminated step-by-step by vacuum 

The advantage of the method is its simplicity in fact it is a simple distillation. The disadvantages are that a large volume of water needs to be distilled, a large volume of waste water results, and there is a high energy consumption in the water distillation. 

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