Production of polyurethane systems
AssigneeEvonik Operations GmbH
InventorsEva Emmrich-Smolczyk, Mladen Vidakovic, Kai-Oliver Feldmann, Annegret Terheiden
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Abstract
The invention provides a process for production of polyurethane systems by reacting at least one polyol component with at least one isocyanate component in the presence of one or more catalysts for the isocyanate-polyol and/or isocyanate-water reactions and/or the trimerization of isocyanate, wherein said reacting is carried out in the presence of carrier material and polyamine P.
Claims14
A process for production of polyurethane systems, comprising;
- reacting a reaction mixture comprising 25-75 wt. % of a polyol component comprising a polyetherol, and optionally water;
- an isocyanate component;
- one or more catalysts for reaction of the isocyanate component and the polyetherol, for reaction of the isocyanate component and water, and/or
- trimerization of the isocyanate component,
- a carrier material;
- and
- a polyamine P
- wherein wt. % is based on a weight of said reaction mixture and
- said reacting is carried out in the presence of a mass fraction of in total from 0.01 to 10 parts by weight of said carrier material and said polyamine P based on 100 parts by weight of the polyol component and wherein a relative amount of carrier material based on an amount of polyamine P is 0.1 to 10 wt. %, wherein the polyamine P results from the reaction of a guanidine salt with a polyamine of formula (I)
- H2N—CH2—CH2—NH—(CH2—CH2—NH)x—CH2—CH2—NH2 (I)
- where x=1, and
- wherein said carrier material used is a hydrophobized
- silica.
A process for reducing aldehyde emission from polyurethane systems, comprising admixing to the polyurethane systems or precursors thereof a carrier material and a polyamine P wherein the polyamine P is a reaction product wherein the polyamine P results from the reaction of a guanidine salt with a polyamine of formula (I)
- H2N—CH2—CH2—NH—(CH2—CH2—NH)x—CH2—CH2—NH2 (I)
- where x=1,
- in an amount of from 0.001 to 10 wt %, based on the overall weight of the polyurethane systems and wherein a relative amount of carrier material based on an amount of polyamine P is 0.1 to 10 wt. %, wherein the admixing takes place before and/or during the production of the polyurethane systems,
- wherein the carrier material used is a hydrophobized silica.
A process for reducing aldehyde emission comprising formaldehyde, acetaldehyde, acrolein and benzaldehyde, from polyurethane foam systems, comprising admixing to the polyurethane foam systems or precursors thereof a carrier material and a polyamine P wherein the polyamine P results from the reaction of a guanidine salt with a polyamine of formula (I)
- H2N—CH2—CH2—NH—(CH2—CH2—NH)x—CH2—CH2—NH2 (I)
- where x=1, in an amount of from 0.01 to 5 wt %, based on the overall weight of the polyurethane foam systems, wherein the admixing may take place before and/or during the production of the polyurethane foam systems, and
- wherein the carrier material used is a hydrophobized silica and a relative amount of carrier material based on an amount of polyamine P is 0.1 to 10 wt. %.
Dependencies are inferred from the claim text.