摘要:
A novel heterogeneous liquid phase catalytic process for dehydration of monoethanolamine to ethylenimine and water has been discovered. The process utilizes a novel catalyst made by modifying a cation exchange resin in the hydrogen ion form. The process using the catalyst is performed in a solution of monoethanolamine in a solvent.
摘要:
A film having a width of at least about one foot as defined by the cross machine direction thereof and a substantially uniform average thickness of less than about 10 mils is formed of a crosslinkable thermoplastic olefin polymer, a crosslinking agent, and preferably a flame retardant. The film can be combined with a suitable substrate to form a prepreg or coated substrate, and the prepreg or coated substrate can be subsequently treated under conditions to crosslink the olefin polymer and to form a rigid composite structure. The composite structure is particularly useful for printed circuit board applications.