Preparation of cellular polyurethanes
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United States of America Patent
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Nov 26, 1996
Grant Date -
N/A
app pub date -
Oct 12, 1995
filing date -
Nov 10, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for the production of cellular polyurethanes by reacting a) at least one organic and/or modified organic polyisocyanate, b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, if desired c) low-molecular-weight chain extenders and/or crosslinking agents, in the presence of d) blowing agents, e) catalysts, and, if desired, f) auxiliaries and/or additives, wherein the blowing agent d) is at least one acetal.
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