摘要:
Production of polyacyloxalamidrazones, especially a very high molecular weight polyterephthaloyloxalamidrazone having recurring units of the formula BY AN INTERFACIAL POLYCONDENSATION OF OXALIC ACID BISAMIDRAZONE WITH AN ACYL DIHALIDE MONOMER SUCH AS TEREPHTHALIC ACID DICHLORIDE AT TEMPERATURES OF 0*C. to 60*C. in a two-phase solvent system consisting essentially of water and a waterimmiscible, inert organic solvent, in the presence of an acid acceptor and in the presence of a substantial amount of a neutral alkali metal salt. High molecular weight polymer films or filaments can be formed from an alkaline solution of the polymer.
摘要:
THIS INVENTION RELATES TO HYDROXYBOROXIN-AMINE SALTS WHICH ARE PREPARED BY REACTING BORIC ACID WITH AN AMINE AS DESCRIBED HEREINAFTER. THE COMPOUNDS ARE USEFUL INTER ALIA AS FUNGICIDES AND ADDITIVES FOR LUBRICATING OILS.
摘要:
AROMATIC AZO BLOCK COPOLYMERS HAVING AN AZO GROUP CONTAINING WHOLLY AROMATIC BLOCK POLYMER UNIT AND A SECOND WHOLLY AROMATIC NON-AZO BLOCK POLYMER UNIT ARE PREPARED AND ARE USEFUL IN THE PREPARATION OF FIBERS, FILAMENTS, FILMS AND OTHER SHAPED ARTICLES FOR APPLICATION WHERE THERMAL RESISTANCE, LIGHT STABILITY, SEMI-CONDUCTING AND PHOTOCHROMIC PROPERTIES ARE DESIRED.
摘要:
FIBER FORMING AZO POLYMERS ARE PREPARED FROM AROMATIC PRIMARY DIAMINES WHICH CONTAIN AN INTERNAL HETEROCYCLIC LINKAGE BY OXIDATIVE SOLUTION POLYMERIZATION.
摘要:
CARBONIUM AND OXONIUM HEXAFLUORO PHOSPHATE COMPOUNDS ARE USED AS CATALYSTS IN THE POLYMERIZATION OF MONOMERIC MATERIALS SUCH AS CYCLIC ETHERS, FORMALS, ACETALS, N-ARYLIMINO COMPOUNDS, ALKYL VINYL ETHERS, AROMATIC VINYL COMPOUNDS AND ALKENES.