| abstract |
PURPOSE: To improve gas permeability by polymerizing a polyamine component contg. a component having a specific repetitive unit and a polyiscocyanate component contg. a specific siloxane structure. n CONSTITUTION: A titled permeable membrane consists of a polyamide component and a polyisocyanate component which are polymerized like a film on a microporous backing membrane. ≥30mol% said polyamide component has the repetitive unit expressed by the formula I and/or formula II [R 1 is a methyl group, ethyl group, propyl group or phenyl group, X is a residual alaphat., alicyclic or arom. group having ≥1 primary or secondary amino group, (n) is 1W10 integers]. ≥50mol% said isocyanate component contains a siloxane polyisocyanate having ≥1 siloxane structure expressed by the formula III (R 2 and R 3 are the same or different 1W4C alkyl groups or phenyl groups) in a molecule and having ≥2 isocyanate groups. n COPYRIGHT: (C)1984,JPO&Japio |