Production of chlorofluorocarbon-free, urethane-containing moldings having a cellular core and a compacted peripheral zone
First Claim
1. A process for the production of chlorofluoro-carbon-free, urethane- or urethane- and urea-containing moldings having a cellular core and a compacted peripheral zone, by reactinga) an organic and/or modified organic polyisocyanate withb) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, and, if optionally,c) a low-molecular-weight chain extender and/or crosslinking agent, in the presence ofd) a blowing agent,e) a catalyst,f) additives and, if optionally,g) assistants,in a closed mold with compaction, wherein one of the additives (f) is microporous activated charcoal, microporous carbon molecular sieve or a mixture thereof.
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Accused Products
Abstract
A process for the production of chlorofluorocarbon-free, urethane- or urethane- and urea-containing, soft-elastic, semirigid or rigid moldings having a cellular core and a compacted peripheral zone and an essentially pore-free, smooth surface involves reacting
a) an organic and/or modified organic polyisocyanate with
b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, and, if desired,
c) a low-molecular-weight chain extender and/or cross-linking agent,
in the presence of
d) a blowing agent,
e) a catalyst,
f) at least one microporous activated charcoal and/or microporous carbon molecular sieve which preferably has a mean pore diameter with a frequency of occurrence of more than 40% in the range from 0.3 to 3 nm, a pore volume of from 0.20 to 1.4 ml/g and a BET surface area of from 500 to 2500 m2 /g, and, if desired, further additives and
g) assistants,
in a closed mold with compaction.
32 Citations
16 Claims
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1. A process for the production of chlorofluoro-carbon-free, urethane- or urethane- and urea-containing moldings having a cellular core and a compacted peripheral zone, by reacting
a) an organic and/or modified organic polyisocyanate with b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, and, if optionally, c) a low-molecular-weight chain extender and/or crosslinking agent, in the presence of d) a blowing agent, e) a catalyst, f) additives and, if optionally, g) assistants, in a closed mold with compaction, wherein one of the additives (f) is microporous activated charcoal, microporous carbon molecular sieve or a mixture thereof.
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16. A process for the production of moldings for the inside or outside of vehicles.
Specification