Improvements in or relating to the manufacture of polyurethanes

A process for the manufacture of polyurethanes comprises interacting at least one organic diisocyanate with castor oil partially esterified with 0.3 to 0.6 of an equivalent (per mol. of oil) of a mono- or di-carboxylic acid so as to have an acid value lower than 8 mgm. KOH per gm. Acids specified ar...

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Bibliographische Detailangaben
Hauptverfasser:	SHEARING HERBERT JACKSON, GUDGEON HERBERT, ABBOTSON WILLIAM
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR LAUNDERING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF TEXTILES OR THE LIKE WALL, FLOOR OR LIKE COVERING MATERIALS, e.g. LINOLEUM,OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF AFIBROUS WEB COATED WITH A LAYER OF MACROMOLECULARMATERIAL
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Beschreibung
Zusammenfassung:	A process for the manufacture of polyurethanes comprises interacting at least one organic diisocyanate with castor oil partially esterified with 0.3 to 0.6 of an equivalent (per mol. of oil) of a mono- or di-carboxylic acid so as to have an acid value lower than 8 mgm. KOH per gm. Acids specified are oleic, lauric, coconut oil fatty acids, succinic, adipic, isophthalic and phthalic acids. Tolylene, diphenyl methane, mixed diaryl methane diisocyanates and 1 : 1-bis-(4-isocyanatophenyl)-cyclohexane are specified. The reaction may be effected in the presence of tertiary amines and of fillers such as mica or silica. The initial part of the reaction may be effected under reduced pressure. The products are useful for potting electrical components and for making resilient rollers.