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US 2002/0120028 A1Published application
Polyurethane elastomers which exhibit improved stability to hydrolysis
OwnerKlaus Lorenz, Marc Schutze +2inventors
InventorsKlaus Lorenz, Marc Schutze, Erhard Michels, Alexander Eckhardt
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Abstract
A solid and/or cellular polyurethane elastomers which are produced using polyester polyols are disclosed. The elastomers which exhibit improved stability to hydrolysis are characterized in that their preparation is carried out in the presence of at least one disulphonates or polysulphonates.
Claims5
A polyurethane elastomer comprising the product of the reaction of
- a) at least one diisocyanate and/or polyisocyanate with
- b) at least one polyester polyol having an OH number of 20 to 280 and a functionality of 1 to 3, and optionally with
- c) one or more polyether polyol or polyether ester polyol each having an OH number of 10 to 149 and a functionality of 2 to 8, and optionally with
- d) one or more members selected from the group consisting of chain extenders having molecular weights lower than 800 and crosslinking agents with having OH numbers of 150 to 1870. in the presence of
- e) at least one amine catalyst,
- f) at least one member selected from the group consisting of disulphonates and polysulphonates, and optionally
- g) a foaming agent, and optionally
- h) one or more conventional additives,
- wherein the maximum ratio of the number of sulphonate groups in said f) to the number of amino groups in e) is 1.0.
6 more elements
Dependencies are inferred from the claim text.