Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1975-05-02
1977-03-08
Czaja, Donald E.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 25AC, 260431, 428310, 428313, 428314, B32B 520, C08G 1818
Patent
active
040111806
ABSTRACT:
A novel catalyst combination for the trimerization of polyisocyanates to polyisocyanurates is disclosed. The catalyst combination comprises (i) an alkali metal salt of an N-substituted amide, (ii) an alkali metal salt of an N-(2-hydroxyphenyl)methyl glycine, and optionally a tertiary amine trimerization catalyst. The use of these catalyst combinations in the preparation of polyisocyanurate foams results in the facile continuous formation of laminate board stock. The polyisocyanurate foams produced using the novel catalyst combinations of the invention are characterized by having high resistance to heat distortion and volume change.
REFERENCES:
patent: 3516950 (1970-06-01), Haggis
patent: 3801421 (1974-04-01), Allen et al.
patent: 3814659 (1974-06-01), Nadeau
patent: 3903346 (1975-09-01), DeLeon et al.
Lockwood Robert J.
Reymore, Jr. Harold E.
Thompson Edward J.
Czaja Donald E.
Firth Denis A.
Rose James S.
The Upjohn Company
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