Organic compounds -- part of the class 532-570 series – Organic compounds – Isocyanate esters
Patent
1982-04-02
1986-10-21
Torrence, Dolph H.
Organic compounds -- part of the class 532-570 series
Organic compounds
Isocyanate esters
521159, C07C12724
Patent
active
046187065
ABSTRACT:
This invention relates to a process for the preparation of aromatic polyisocyanates containing urea and/or biuret groups, optionally in the form of a mixture of homologues and/or isomers, by the reaction of aromatic diisocyanates with diamines having primary or secondary amino groups at about 20.degree. to 180.degree. C., and at an equivalent ratio of isocyanate groups to amino groups in the range of 5:1 to 100:1, at least 25 mol percent of the diisocyanates put into the process and/or at least 25 mol percent of the diamines put into the process being alkyl-phenylene diisocyanates or, respectively, alkyl-phenylene diamines, in which the alkyl substituents have 6 to 18 carbon atoms, and the use of the products of the process, optionally as solutions in excess starting diisocyanate, as isocyanate components in the production of polyurethanes.
REFERENCES:
patent: 3824266 (1974-07-01), Dieterich et al.
patent: 4264519 (1981-04-01), Hennig et al.
patent: 4292255 (1981-09-01), Hennig et al.
Polyurethanes, Chemistry & Technology Part I p. 190 et seq., Saunders & Frisch, Interscience Publishers 1962.
Hettel Hans
Scholl Hans-Joachim
Bayer Aktiengesellschaft
Gil Joseph C.
Harsh Gene
Roy Thomas W.
Torrence Dolph H.
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