Process for the preparation of polyurethane resins using low molecular weight polyhydroxyl compounds prepared by the condensation of formaldehyde

This invention relates to a process for the preparation of polyurethane resins by the reaction of polyisocyanates with a mixture of various low molecular weight hydroxyaldehydes, hydroxyketones and polyhydric alcohols obtained by an improved process for the condensation of formaldehyde with itself.

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Bibliographische Detailangaben
Hauptverfasser:	WAGNER, KUNO
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON DERIVATIVES THEREOF GENERAL METHODS OF ORGANIC CHEMISTRY HUMAN NECESSITIES HYGIENE MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MEDICAL OR VETERINARY SCIENCE METALLURGY NUCLEIC ACIDS NUCLEOSIDES NUCLEOTIDES ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS SUGARS THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	This invention relates to a process for the preparation of polyurethane resins by the reaction of polyisocyanates with a mixture of various low molecular weight hydroxyaldehydes, hydroxyketones and polyhydric alcohols obtained by an improved process for the condensation of formaldehyde with itself.