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US 4,048,106 AGranted
Novel polyureas prepared by reaction of a diamine with a diisocyanate or a diisothiocyanate
Assignees.a. Texaco Belgium n.v.
InventorJohny C. Hermans
Life of this patent
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Abstract
Polyureas containing phosphorus are prepared by the reaction of a diisocyanate or a diisothiocyanate with a diamine. In a typical reaction, phenyl bispiperazidophosphate is reacted with tolylene -2,4-diisocyanate to yield a polyurea product which may be cast into a non-burning, flexible film.
Claims13
Polyureas containing repeating groups of the formula ##STR15## X is absent or represents an oxygen or sulphur atom or a group of the formula =N-R in which R represents an aliphatic, cycloaliphatic or aromatic group or a heterocyclic group;
- X' represents an oxygen or sulphur atom;
- Y represents an aliphatic, cycloaliphatic or aromatic hydrocarbon group or heterocyclic group;
- a group of the formula -NR.sub.2 wherein R has the meaning given above or wherein the two groups R and the nitrogen atom to which they are attached together represent a N-containing heterocyclic ring;
- a group of the formula --OR in which R has the meaning given above;
- or a group of the formula ##STR16## R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent a substituent on the piperazine ring said substituents R.sup.1, R.sup.2 and R.sup.3 containing no active hydrogen atoms reactive with isocyanate or isothiocyanate groups, and substituent R.sup.4 being hydrogen or a substituted or unsubstituted aliphatic, cycloaliphatic or aromatic hydrocarbon group, a heterocyclic group, an acyl group, a sulphonyl group, or a substituted carbamoyl group, --CO--NHR, wherein R has the meaning give above,
- n.sup.1, n.sup.2 and n.sup.3, which may be the same or different each represents O or an integer;
- and
- Z represents the residue obtained by removal of the NCO or NCS groups from an organic diisocyanate or diisothiocyanate.
5 more elements
Dependencies are inferred from the claim text.