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US 5,208,271 AGranted
Flexible polyurethane foams with reduced tendency for shrinkage
AssigneeBASF SE
InventorJames A. Gallagher
Life of this patent
Estimating the term…
Abstract
A perfluorinated sulfonamide surfactant is provided which reduces polyurethane foam shrinkage upon demolding. The surfactant is particularly useful to reduce shrinkage of water-blown flexible polyurethane foams without the need for mechanical crushing.
Claims10
A polyol composition comprising a polyoxyalkylene polyether polyol and a perfluorinated sulfonamide surfactant having the following formula:
- ##STR2## wherein R.sub.1 and R.sub.2 are each independently hydrogen or a branched or unbranched alkyl, aryl, aralkyl having 1-20 carbon atoms;
- with R.sub.1 and/or R.sub.2 optionally being bonded end to end as a heterocyclic ring;
- and R.sub.1 and/or R.sub.2 optionally containing as internal to an alkyl chain the groups --NR'--, --NR'.sub.2 --, --O--, --SO.sub.2 --, --OOC--, --COO--, --CO--, --CONR'--, --NR'CO--, or --SO.sub.2 NR';
- and/or as terminal to an alkyl chain the groups --OH, --COOH--, --NH.sub.2, --NHR.sup.1, --COH, and R' is independently a branched or unbranched alkyl having up to 18 carbon atoms;
- and wherein n is from 4 to 20.
2 more elements
A process for the preparation of a polyol composition comprising blending a polyoxyalkylene polyether polyol and a perfluorinated sulfonamide surfactant having the following formula:
- ##STR3## wherein R.sub.1 and R.sub.2 are each independently hydrogen or a branched or unbranched alkyl, aryl, aralkyl having 1-20 carbon atoms;
- with R.sub.1 and/or R.sub.2 optionally being bonded end to end as a heterocyclic ring;
- and R.sub.1 and/or R.sub.2 optionally containing as internal to an alkyl chain the groups --NR'--, --NR'.sub.2 --, --O--, --SO.sub.2 --, --OOC--, --COO--, --CO--, --CONR'--, --NR'CO--, or --SO.sub.2 NR';
- and/or as terminal to an alkyl chain the groups --OH, --COOH--, --NH.sub.2, --NHR.sup.1, --COH, and R' is independently a branched or unbranched alkyl having up to 18 carbon atoms;
- and wherein n is from 4 to 20.
2 more elements
Dependencies are inferred from the claim text.