Process for the production of a cellular polyurethane
AssigneeBayer Aktiengesellschaft
InventorsClaus-Dieter Sommerfeld, Werner Rasshofer
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Abstract
The present invention is directed to a process for preparing a cellular polyurethane by reacting with an NCO-reactive component in the presence of a homogeneous mixture of an optionally water-containing adduct of carbon dioxide an amine containing at least one secondary amino group, low primary amino groups and at least one primary or secondary hydroxyl group (provided there are not more primary hydroxyl groups than amino groups), an amine catalyst and optionally monofluorotrichlormethane. The present invention is directed to the homogeneous mixture these three components.
Claims12
A process for the production of a cellular polyurethane which comprises reacting:
- (A) a polyisocyanate with
- (B) an NCO-reactive component comprising
- (1) a compound containing at least one NCO-reactive group and having a molecular weight of 60 to 1999 and a functionality of 2 to 8,
- (2) optionally a compound containing at least one NCO-reactive group and having a molecular weight of 1000 to about 12,000 and a functionality of 2 to 8,
- in the presence of a homogeneous mixture which comprises, based on 100 parts by weight of B 1. +B 2.,
- (3) about 0.05 to 25 parts by weight of an optionally water-containing adduct of carbon dioxide with an -amine-containing at least one secondary amino group, no primary amino groups, and at least one primary or secondary hydroxyl group provided there are not more primary hydroxyl groups than amino groups, and
- (4) about 0.05 to 25 parts by weight of an amine catalyst, and
- (5) about 0.5 50 parts by weight of monofluorotrichloromethane, optionally in the presence of
- (C) water and/or further inorganic or organic blowing agents, foam stabilizers and other additives usual in the production of cellular polyurethanes.
A homogeneous mixture consisting of
- (3) about 0.05 to 25 parts by weight of an optionally water-containing adduct of carbon dioxide with an amine containing at least one secondary amino group, no primary amino groups and at least one primary or secondary hydroxyl group provided there are not more primary hydroxyl groups than amino groups,
- (4) about 0,05 to 25 parts by weight of an amine catalyst and
- (5) about 0.5 to 50 parts by weight of monofluorotrichloromethane.
Dependencies are inferred from the claim text.