Process for the production of flame-retardant polyurethane foams
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United States of America Patent
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Apr 9, 1991
Issued Date -
N/A
app pub date -
Aug 3, 1989
filing date -
Sep 24, 1987
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Expired
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Abstract
This invention relates to a process for preparing flame-retardant polyurethane foams comprising impregnating an open-cell polyurethane foam with a mixture of a cross-linkable polychloroprene elastomer latex; a flame-retarding zinc salt of a metaboric or polyboric acid; a crosslinking agent, preferably zinc oxide; and, optionally, aluminum hydroxide and other additives. This invention further relates to the use of the low flammability, non-melting polyurethane foams for the manufacture of upholstery materials.
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