Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1982-09-29
1984-07-10
Anderson, Philip E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
264 453, 264 455, 264 467, 2643286, 264DIG83, 521163, C08G 1810, C08G 1832, B29D 2704
Patent
active
044593996
ABSTRACT:
A polyamine mixture formed from formaldehyde, an ortho-alkylaniline, and an ortho,ortho-dialkylaniline. The polyamine mixture is prepared by heating one of the anilines with formaldehyde, mixing the other aniline with an acid catalyst, and slowly adding the former to the latter. The mixtures are useful as chain extenders in polyurethane processes including reaction injection molding. The novel mixtures give unexpected mold gel and set times as compared to corresponding unmixed compounds formed from a single aniline or formed by previous typical condensation reactions. Also, the proportion of polyamines made by the novel mixtures may be varied to give excellent physical characteristics.
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Ihrman Kryn G.
Keblys Kestutis A.
Lucast Donald H.
Anderson Philip E.
Ethyl Corporation
Hunt John F.
Johnson Donald L.
Sieberth John F.
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