AQUEOUS COMPOSITIONS OF POLYALDEHYDES FROM OXIDATION OF POLYSACCHARIDES AND THEIR THERMOSETTING RESINS

摘要

PROBLEM TO BE SOLVED: To provide a formaldehyde-free aqueous thermosetting binder composition used for glass or mineral wool fiber insulator and mats.SOLUTION: The present invention provides thermosetting aqueous binder compositions, comprising a diprimary amine or poly(primary amine) and one or more water-soluble oxidized dextrin made by oxidizing: a dextrin having a DE value of from 2 to 25 and having from 2 to 10 millieq CHO/g of dry oxidized dextrin; or a larger oxidized dextrin or an oxidized dextrin made by oxidizing a dextrin having a DE value of below 2 and having from 0.25 to 5 millieq CHO/g of dry oxidized dextrin. The thermosetting aqueous binder compositions provide hot wet tensile strength when heat cured.