Aromatic diisocyanates containing N,N-disubstituted sulfonamide

Details Aromatic diisocyanates containing N,N-disubstituted sulfonamide Aromatic diisocyanates containing N,N-disubstituted sulfonamide

1982-07-22

1985-01-29

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2602396, 2603977R, 260453AM, 260453P, 528 44, 548518, 548542, C07C119048

Patent

active

044964919

ABSTRACT:
Diisocyanates corresponding to the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 (an isocyanate-containing radical) are as defined herein are made by several processes. These diisocyanates may be made by phosgenating the diamine in which the diisocyanate is based. They may also be produced by treating the bis-urethane of the tertiary alcohol corresponding to the diisocyanate with phosgene. Such diisocyanates may also be made by treating a specific type of bis-urea with hydrogen chloride. The diisocyanates corresponding to the above-given formula are particularly useful in the production of polyurethanes having good flame-proof and mechanical properties.

REFERENCES:
patent: 3242208 (1966-03-01), Martin
patent: 3576872 (1971-04-01), Singhal
Abstract Netherlands, No. 7,105,350, 10/24/72.
Abstract Japanese, No. 73 16 502, 5/22/73.

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