Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1980-07-21
1981-08-25
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
528 49, 521128, C08G 1814
Patent
active
042860725
ABSTRACT:
Polyisocyanurate catalysts are disclosed which have the formula: ##STR1## where R.sub.1 and R.sub.2 are independently selected from alkyl groups of less than about 3 carbon atoms or where R.sub.1 and R.sub.2 together comprise cycloalkyl or morpholino groups and where R.sub.3 is hydrogen or alkyl groups containing less than about 3 carbon atoms. Said catalysts are useful in promoting the reaction between a polyol and an aromatic polyisocyanate to prepare a polymer containing recurring isocyanurate and urethane linkages.
REFERENCES:
patent: 3516950 (1970-06-01), Haggis
patent: 3580868 (1971-05-01), Diehr et al.
patent: 3620986 (1971-11-01), Diehr et al.
patent: 3625872 (1971-12-01), Ashida
patent: 3635848 (1972-01-01), Rambosek
patent: 3725319 (1973-04-01), Frisch
patent: 3745133 (1973-07-01), Communale et al.
McEntire Edward E.
Zimmerman Robert L.
Kulason Robert A.
Priem Kenneth R.
Ries Carl G.
Texaco Development Corp.
Welsh Maurice J.
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