Rigid foams deformable by heat and processes for their preparation and use
AssigneeBayer Aktiengesellschaft
InventorsEberhard Konig, Uwe F. Gronemeier, Karl-Josef Kraft
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Abstract
Thermoformable rigid foams are made by reacting an organic polyisocyanate with a polyol component. The polyol component includes at least one organic polyhydroxyl compound having a hydroxyl number of from 28 to 1200, a foaming agent, a catalyst and a compound which masks isocyanate groups. Preferred isocyanate masking compounds are .epsilon.-caprolactam and nonyl phenol. The foam thus obtained may then be molded and crosslinked by heating it to a temperature of from 150.degree. to 190.degree. C. These foams are particularly useful as interior trim for motor vehicles.
Claims10
A thermoformable rigid foam which is the reaction product of
- (a) an organic polyisocyanate and
- (b) a polyol component containing
- (b1) at least one organic polyhydroxyl compound having a hydroxyl number of from 78 to 1200,
- (b2) a foaming agent, foam stabilizer and catalyst, and
- (b3) from 1 to 25 wt. % based on total weight of polyol compound (b) of at least one compound which masks isocyanate groups.
A process for the production of a thermoformable rigid foam in which
- (a) an organic polyisocyanate is reacted with
- (b) a polyol component containing
- (b1) at least one organic polyhydroxyl compound having a hydroxyl number of from 28 to 1200,
- (b2) a foaming agent and catalyst, and
- (b3) from 1-25 wt. % (based on total weight of polyol component (b)) of at least one compound which masks isocyanate groups.
Dependencies are inferred from the claim text.