Patent ID: 11919994
Assignee: COVESTRO DEUTSCHLAND AG
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A process for producing flexible polyurethane foam, the process comprising reacting a composition to obtain the flexible polyurethane foam, the composition comprising:
a component A1 containing at least one filled polyol,
a component A2 containing isocyanate-reactive compounds having an OH number according to DIN 53240-1, method without catalyst, June 2013, of ≥20 to <100 mg KOH/g and wherein the component A2 contains no filled polyol,
a component A3 containing water and/or at least one physical blowing agent,
a component A4 containing auxiliary and additive substances and
a component B containing di- and/or polyisocyanates,
wherein production is carried out at an index of 90 to 140,, and wherein the reaction is carried out in the presence of
0.5 to 3.0 parts by weight, based on the sum of the components A1 and A2, of an organic urea derivative as component C which is obtained by reaction of urea with a difunctional amine, wherein the difunctional amine has a number-average molecular weight determined according to DIN 55672-1 March 2016, part 1, with gel permeation chromatography using polystyrene standards and tetrahydrofuran as eluent of 200 to 1000 g/mol.