Process for molding microcellular elastomeric polurethane articles and microcellular elastomeric polyurethanes therefor

摘要

A novel, particularly flexible, improved process for molding microcellular elastomer polyurethane articles comprises reacting a first type quasi-polyurethane, having a molecular weight of from 600 to 2200 and a free isocyanate group percent content of from 14 to 3.8, with at least one of a second type of quasi-polyurethane, having a molecular weight of from 3000 to 8000 and a free hydroxyl group percent content of from 1.13 to 0.48, and a glycol and optionally in the presence of water. The process according to the invention is particularly well-suited for automation by means of a processor. Also, the preparation of certain microcellular elastomer polyurethanes that are useful in the improved molding process is described.