Process for the production of polyureas

Details Process for the production of polyureas Process for the production of polyureas

1975-07-18

1977-06-07

Person, Sandra M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08G 1806

Patent

active

040283100

ABSTRACT:
This invention relates to a process for the production of polyureas by reacting organic polyisocyanates with diamines, optionally in the presence of other polyfunctional compounds, i.e. polyfunctional in the isocyanate polyaddition context, having isocyanate-reactive hydrogen atoms, which is distinguished by the fact that the polyisocyanates used have an NCO-content of about 0.5 to 25%, by weight, and which, in addition, have an acylated urea group ##STR1## content of about 0.5 to 50% by weight and, optionally, a carbodiimide group (-N=C=N-) content of about 0 to 25% by weight.
The invention also relates to the use of the polyureas obtained by this process for the production of coatings, lacquer finishes and impregnations.

REFERENCES:
patent: 3314923 (1967-04-01), Muller et al.
patent: 3578639 (1971-05-01), Sheffer
patent: 3850880 (1974-11-01), Hakanson et al.

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