3, 5-dioxabicyclo(5.4.0) undecane and copolymers thereof

Copolymers are made by copolymerizing 3,5-dioxabicyclo-(5,4,0) -undecane having the formula with formaldehyde or with a formaldehyde source which forms formaldehyde under the conditions of polymerization such as trioxane or paraformaldehyde. Polymerization is preferably effected in a common solvent...

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Bibliographische Detailangaben
1. Verfasser:	JR. THOMAS H. WICKER
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON HETEROCYCLIC COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	Copolymers are made by copolymerizing 3,5-dioxabicyclo-(5,4,0) -undecane having the formula with formaldehyde or with a formaldehyde source which forms formaldehyde under the conditions of polymerization such as trioxane or paraformaldehyde. Polymerization is preferably effected in a common solvent such as cyclohexane, catalysed by boron fluoride butyl etherate. Preferred polymers contain 90 to 98.8% formaldehyde units and may be used for the production of films, fibres and moulded objects. Unstable products of the polymerization reaction may be removed by heat treatment or stabilized by acylation.ALSO:3,5 - Dioxabicyclo - (5.4.0) undecane having the formula is made by reacting 1,2-cyclohexanedimethanol and paraformaldehyde in the presence of an acidic catalyst with removal of water produced by the reaction.