NON-DUSTING CROSS-LINKING AGENT FOR CAST URETHANE ELASTOMERS AND PROCESS FOR PREPARING SAID AGENT Russian patent published in 1994 - IPC

FIELD: use as a non-dusting cross-linking agent. SUBSTANCE: the product is a composition comprising (%): 92-98 4,4′ diamino-3,3′-dichlorodiphenylmethane; 2-8 phthalic or sebacic acid dibutyl or dioctyl ester. Reagent 1: an aqueous suspension comprises 4,4′-deamino-3,3′- dichlorodiphenylmethane. Reagent 2: an emulsion comprises (%) 60-65 phthalic or sebacic acid dibutyl or dioctyl ester; 0.1-1.0 polyacrylamide and water, the balance. Reaction conditions: at 50-70 C; the emulsion is used in an amount of 3.4-13.4 wt % per 4,4′-deamino- 3,3′-dichlorodiphenylmethan. EFFECT: improved properties of the non-dusting cross-linking agent and greater efficiency of the process.