Isocyanurate preparation by catalytic, aminosilyl initiated cyclotrimerization of isocyanates
First Claim
1. A process for the preparation of a monomeric or polymeric isocyanurate compound, comprising catalytically cyclotrimerizing an isocyanate in which the isocyanate moiety is not directly bonded to an aromatic carbon atom, in the presence of an effective amount of an aminosilyl catalysis initiator having the structural formula:
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space="preserve" listing-type="equation">R.sub.(4-n) Si--NR'"'"'R"].sub.n (I)wherein R is a saturated or unsaturated, aliphatic, cycloaliphatic, aryl, aralkyl or alkylaryl monovalent hydrocarbon radical, or halo or cyano substituted such radical, and further wherein any two radicals R may together form a single divalent such hydrocarbon radical;
R'"'"' is R, SiR3 or an amido radical having the structural formula;
##STR4## wherein R'"'"'" is R or SiR3, with R being as above defined, and further wherein R'"'"', when R'"'"' is neither the amido radical nor SiR3, may, together with the radical R", form a single divalent such radical;
R" is R, or a hydrogen atom when R'"'"' is not the amido radical; and
n is either 1 or 2, but when n is 2, R'"'"' is R.
1 Assignment
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Accused Products
Abstract
Monomeric or polymeric isocyanurates, e.g., polyisocyanate/polyisocyanurates, are prepared by catalytically cyclotrimerizing an isocyanate, e.g., an aliphatic or cycloaliphatic isocyanate, in the presence of an aminosilyl catalysis initiator, e.g., a mono- or diaminosilane, a silylurea or a silazane, having the structural formula:
R.sub.(4-n) Si--NR'"'"'R"].sub.n (I)
wherein R is a saturated or unsaturated, aliphatic, cycloaliphatic, aryl, aralkyl or alkylaryl monovalent hydrocarbon radical, or halo or cyano substituted such radical, and further wherein any two radicals R may together form a single divalent such hydrocarbon radical; R'"'"' is R, SiR3 or an amido radical having the structural formula: ##STR1## wherein R'"'"'" is R or SiR3, with R being as above defined, and further wherein R'"'"', when R'"'"' is neither the amido radical nor SiR3, may, together with the radical R", form a single divalent such radical; R" is R, or a hydrogen atom when R'"'"' is not the amido radical; and n is either 1 or 2, but when n is 2, R'"'"' is R.
48 Citations
20 Claims
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1. A process for the preparation of a monomeric or polymeric isocyanurate compound, comprising catalytically cyclotrimerizing an isocyanate in which the isocyanate moiety is not directly bonded to an aromatic carbon atom, in the presence of an effective amount of an aminosilyl catalysis initiator having the structural formula:
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space="preserve" listing-type="equation">R.sub.(4-n) Si--NR'"'"'R"].sub.n (I)wherein R is a saturated or unsaturated, aliphatic, cycloaliphatic, aryl, aralkyl or alkylaryl monovalent hydrocarbon radical, or halo or cyano substituted such radical, and further wherein any two radicals R may together form a single divalent such hydrocarbon radical;
R'"'"' is R, SiR3 or an amido radical having the structural formula;
##STR4## wherein R'"'"'" is R or SiR3, with R being as above defined, and further wherein R'"'"', when R'"'"' is neither the amido radical nor SiR3, may, together with the radical R", form a single divalent such radical;
R" is R, or a hydrogen atom when R'"'"' is not the amido radical; and
n is either 1 or 2, but when n is 2, R'"'"' is R. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification