Abstract:
HIGH YIELDS OF 1,3-CYCLOHEXYLENE DIISOCYANATES ARE PREPARED BY CONTACTING 1,3-CYCLOHEXANEDIAMINES WITH PHOSGENE IN THE PRESENCE OF HYDROGEN CHLORIDE. THE DIISOCYANATES WHEN REACTED WITH POLYESTER OR POLYETHER POLYOLS PROVIDE URETHANE COMPOSITIONS THAT ARE ESPECIALLY SUITABLE FOR USE AS COATINGS, SEALANTS, AND ELASTOMERS.
Abstract:
Carbodiimide-isocyanurate foams containing urethane linkages are prepared by mixing a polyisocyanate, a polyol and a catalyst system comprising an s-triazine compound and a catalyst which promotes urethane linkages. The resulting foams are characterized by low friability and good flame resistance.
Abstract:
A PROCESS FOR THE PREPARATION OF 1,3-CYCLOHEXYLENE DIISOCYANATES IN WHICH 1,3-CYCLOHEXANEDIAMINES ARE CONTACTED WITH HYDOGEN CHLORIDE TO FORM DIHYDROCHLORIDE SALTS WHICH ARE SUBSEQUENTLY REACTED WITH PHOSGENE TO PROVIDE 1,3-CYCLOHEXYLENE DIISOCYANATES.
Abstract:
NOVEL CARBODIMIDE FOAMS ARE PREPARED BY CONDENSING AN ORGANIC POLYISOCYANATE IN THE PRESENCE OF A CATALYTICALLY SUFFICIENT AMOUNT OF A 2,4,6-TRIS(DIALKANOLOAMINO)-S-TRIAZINE CATALYST. THE FOAMS OF THE PRESENT INVENTION ARE RIGID, DENSE CELLULAR COMPOSITIONS WHICH EXHIBIT EXCELLENT FLAME RETARDANCY AND LOW SMOKING CHARACTERISTICS.
Abstract:
2,4,6-Tris(alkanolsubstituted amino)-s-triazines are prepared by reacting stoichiometric quantites of secondary alkanolamines and aqueous cyanuric chloride in the presence of certain inorganic compounds and a coupling or wetting agent. By the process it is possible to prepare 2,4,6-tris(N-methylethanolamino)-s-triazine, a catalytic compound useful in the preparation of rigid foams characterized by carbodiimide linkages.
Abstract:
A PROCESS AND A CATALYST FOR THE PREPARATION OF 1,3CYCLOHEXANEDIAMINES ARE PROVIDED. THE PROCESS COMPRISES HYDROGENATING 1,3-PHENYLENEDIAMINES IN THE PRESENCE OF AN ALKALI-PROMOTED CATALYST CONSISTING OF COBALTOUS OXIDE, CALCIUM OXIDE, AND SODIUM CARBONATE AT ELEVATED TEMPERATURE AND UNDER MODERATE PRESSURE TO FORM 1,3-CYCLOHEXANEDIAMINES. THE ALIPHATIC DIAMINES ARE USEFUL AS INTERMEDIATES IN THE PREPARATION OF POLYURETHANE, POLYUREA, POLYURETHANE-POLYUREA AND POLYAMIDE COATINGS, SEALANTS, AND ELASTOMERS.