A method for the preparation of elastomeric Polyurethane microcellular foams; microcellular Foam obtained and a reaction System for Said method

摘要

A method of extracting an elastic polyurethane microcellular foam from a reaction mixture containing at least 85% by weight of 4.4-diisocyanodiphenyl ether or one of the Ariane components, The composition of the polymer includes at least one polyoxycarbinol with 2-6 hydroxy function on its surface, with an average weight of equivalent hydroxyl of at least 1300, and an average weight of 50-85% monohydroxyethylene, which is a chain extension with an average weight of equivalent hydroxyl. From 15 to 250, and choose a cross agent,The weight of the hard block is more than 45%. The non visible effect concentration elastic meter has valuable performance, can be processed to high hardness, and is used in various applications, such as sole and automobile flyer. It also refers to the elastic microcellular foam D and polyurethane produced by this process, with a density of less than 1000 kg / m3 and a shore hardness of at least 75 degrees. In addition, it refers to the reaction system implementing the method.