Tin and transition metal free polyurethane foams
AssigneeBASF SE
InventorMarco Ortalda
Life of this patent
Estimating the term…
Abstract
The invention relates to tin-free polyurethane foams which are obtainable by reacting polyisocyanates (a) with compounds having isocyanate-reactive hydrogen atoms (b) in the presence of bismuth carboxylates as catalysts (c1).
Claims9
A shoe sole comprising a tin-free polyurethane foam that has a density of from 100 to 800 g/l and is obtained by reacting
- a) polyisocyanates with
- b) compounds having isocyanate-reactive hydrogen atoms in the presence of
- c1)bismuth carboxylates as catalysts, with the bismuth carboxylates being used in an amount of from 0.2 to 2% by weight, based on the total weight of the component b).
A process for producing shoe soles comprising tin-free polyurethane foams that have a density of from 200 to 800 g/l, the process comprising reacting
- a) polyisocyanates with
- b) compounds having isocyanate-reactive hydrogen atoms in the presence of
- c1)bismuth carboxylates as catalysts, with the bismuth carboxylates being used in an amount of from 0.2 to 2% by weight, based on the total weight of the component b).
In a process for the production of polyurethane foams using organic metal catalysts, the improvement comprising using bismuth carboxylates as the sole organic metal catalysts.
(canceled)
Dependencies are inferred from the claim text.