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US 3,946,038 AGranted
N,N'-bis(1,1-dioxohydrothienyl)diaminoalkanes
AssigneeUniroyal, Inc.
InventorsChung-Ling Mao, Lynn A. Bakker
Life of this patent
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Abstract
Certain N,N'-bis(1,1-dioxohydrothienyl)diamino-alkanes, e.g., N,N'-bis(1,1-dioxotetrahydro-3-thienyl)-1,2-diaminopropane, useful as chain extenders for poly-urethanes, especially high resiliency, flexible poly-urethane foams.
Claims24
An N,N'-bis(1,1-dioxohydrothienyl)diaminoalkane having one of the following formulas I or II:
- ##SPC9##
- wherein
- X and Z are the same or different and are hydrogen, an alkyl group having 1 to 5 carbon atoms or halogen,
- Y is hydrogen, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group having 1 to 5 carbon atoms;
- R.sub.1 is hydrogen, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or halogen;
- R is an alkylene group having 1 to 16 carbon atoms, a cycloalkylene group having 4 to 6 carbon atoms, ##SPC10##
- where R.sub.2, R.sub.3 and R.sub.4 are the same or different and are hydrogen or an alkyl group having 1 to 5 carbon atoms.
4 more elements
Dependencies are inferred from the claim text.