US 11,046,807 B2 · Flame-resistant polymer polyol dispersion

Abstract

The invention relates to a process for preparing a flame-resistant polymer-modified polyol having a solids content of 1 to 65 wt. % wherein (i) at least one polyisocyanate and (ii) an olamine are reacted in (iii) a base polyol having at least two active hydrogen containing groups of which more than 50% are primary active hydrogen containing groups and wherein the olamine has at least one phosphonic ester group attached to a tertiary nitrogen atom and contains at least two hydroxyl groups. The invention further relates to a flame-resistant polymer-modified polyol obtainable with the process of the invention, to a process for preparing optionally foamed plastics using the polymer-modified polyol of the invention, and to the use of a polymer-modified polyol for the preparation of flexible polyurethane foams.

Claims20

Dependent claims

A method for preparing a flame-resistant polymer-modified polyol dispersion having a solid content from 1 to 65 wt % based on the total weight of the dispersion comprising:

reacting at least one polyisocyanate and an olamine in the presence of a base polyol having at least two active hydrogen containing groups of which more than 50% are primary active hydrogen containing groups, and a cross-linking agent having a weight average molecular weight from 500 to 800 g/mol,
wherein the olamine has at least one phosphonic ester group attached to a tertiary nitrogen atom and has at least two hydroxyl groups;
and
wherein the ratio of NCO:OH equivalents between the NCO groups of the at least one polyisocyanate and the at least two hydroxyl groups of the olamine is in the range from 0.5:1 to 1.5:1.

1 more element

Dependencies are inferred from the claim text.

Flame-resistant polymer polyol dispersion

Life of this patent

Flame-resistant polymer polyol dispersion

Life of this patent

Abstract

Claims20